WO2009113307A1 - 信号分波器とこれを用いた電子機器、アンテナ装置およびこれらに使われる信号伝送方式 - Google Patents
信号分波器とこれを用いた電子機器、アンテナ装置およびこれらに使われる信号伝送方式 Download PDFInfo
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- WO2009113307A1 WO2009113307A1 PCT/JP2009/001107 JP2009001107W WO2009113307A1 WO 2009113307 A1 WO2009113307 A1 WO 2009113307A1 JP 2009001107 W JP2009001107 W JP 2009001107W WO 2009113307 A1 WO2009113307 A1 WO 2009113307A1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/48—Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/46—Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
- H03H7/463—Duplexers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0682—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission using phase diversity (e.g. phase sweeping)
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
Definitions
- the present invention relates to a signal demultiplexer or signal multiplexer used for electronic parts that perform transmission, reception, and transmission of high-frequency signals such as cellular phones, and electronic devices using these.
- FIG. 43 is a block diagram of a conventional switch duplexer.
- a circuit configuration of an antenna switch duplexer in a composite terminal of a system called GSM of 900 MHz band and a system called 1.8 GHz band DCS in a mobile phone served in Europe will be described as an example.
- reference numerals 1001 to 1005 are input / output ports
- 1006 and 1007 are control terminals
- 1008 to 1011 are diodes
- 1012 and 1013 are transmission lines
- 1014 and 1015 are band pass filters
- 1016 is a diplexer.
- the diplexer 1016 is generally composed of a circuit that combines a low-pass filter 1016a and a high-pass filter 1016b.
- HPF indicates a high-pass filter
- LPF indicates a low-pass filter
- BPF indicates a band-pass filter.
- An antenna (not shown) is connected to the input / output port 1005, and a signal caught by the antenna is first divided into a GSM band signal and a DCS band signal by a diplexer 1016.
- the transmission lines 1012 and 1013 are set to a quarter of the wavelength in the GSM band and the DCS band, respectively, and when a positive voltage is applied to the control terminal 1006 and a current flows, the diodes 1008 and 1010 are turned on, The input / output port 1005 and the input / output port 1001 are connected. Similarly, when a positive voltage is applied to the control terminal 1007 and a current flows, the diodes 1009 and 1011 are turned on, and the input / output port 1005 and the input / output port 1003 are connected. When no voltage is applied to the control terminals 1006 and 1007, the diodes 1008 to 1011 are turned off, and the input / output port 1005 and the input / output ports 1002 and 1004 are connected.
- the input / output ports 1001 and 1003 are transmission ports
- the bandpass filters 1014 and 1015 are reception band limiting filters
- the input / output ports 1002 and 1004 are used as reception input / output ports.
- Patent Document 1 is known.
- the diplexer 1016 is composed of a circuit combining a low-pass filter 1016a and a high-pass filter 1016b, so that signals in different frequency bands can be separated, but two signals of the same frequency are separated. There was a problem that I could not do it.
- the switch duplexer composed of the control terminals 1006 and 1007, the diodes 1008 to 1011, and the transmission lines 1012 and 1013 is an input / output port that is temporally connected to the diplexer 1016 depending on the state of the diodes 1008 to 1011. Therefore, two signals having the same frequency can be used while being temporally switched.
- two signals having the same frequency cannot be transmitted and received at the same time. For example, in a mobile phone, the data transmission / reception speed becomes slow.
- the present invention provides a signal demultiplexer that can transmit and receive two signals of the same frequency at the same time.
- the signal demultiplexer of the present invention is a signal demultiplexer connected to a network having at least four terminals, the first line having one connected to the first terminal of the network, and the first of the network A second line, one of which is connected to the two terminals, a third line, one of which is connected to the third terminal of the network, and a fourth line, one of which is connected to the fourth terminal of the network,
- the other of the first line and the other of the second line are connected at the first intersection, and the other of the third line and the other of the fourth line are connected at the second intersection.
- the signal branching filter of this invention inputs a signal from the 1st intersection, the phase of the signal which appears on the 2nd intersection side of the 3rd line, and the phase of the signal which appears on the 2nd intersection side of the 4th line Is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the phase of the signal appearing on the second intersection side of the third line and the phase of the signal appearing on the second intersection side of the fourth line Since the phase difference is approximately 180 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0), the isolation between the first intersection point and the second intersection point can be generally obtained, whereby the first intersection point and the first intersection point can be obtained.
- signals can be exchanged with the network independently of each other. This makes it possible to provide a signal demultiplexer that can transmit and receive two signals having the same frequency at the same time.
- FIG. 1 is a block diagram of a signal demultiplexer according to Embodiment 1 of the present invention.
- FIG. 2 is a block diagram of a signal demultiplexer according to Embodiment 2 of the present invention.
- FIG. 3 is a block diagram of the signal demultiplexer 1 according to the third embodiment of the present invention.
- FIG. 4 is a conceptual diagram of a general diversity antenna.
- FIG. 5 is a block diagram of an antenna apparatus according to Embodiment 4 of the present invention.
- FIG. 6 is a block diagram of an antenna apparatus according to Embodiment 5 of the present invention.
- FIG. 7 is a block diagram of an antenna device 701 according to Embodiment 6 of the present invention.
- FIG. 8 is a diagram illustrating a signal transmission method using the signal demultiplexer according to Embodiment 7 of the present invention.
- FIG. 9 is a diagram for explaining the operation of the antenna using the signal branching filter according to the seventh embodiment of the present invention.
- FIG. 10 is a diagram illustrating an operating principle of an antenna using a signal demultiplexer according to Embodiment 7 of the present invention.
- FIG. 11 shows an antenna apparatus according to Embodiment 7 of the present invention.
- FIG. 12 shows another antenna apparatus according to Embodiment 7 of the present invention.
- FIG. 13 is a diagram showing an example of designing the antenna device of the seventh embodiment at 620 MHz.
- FIG. 14 is a diagram showing an example of designing the antenna device of the seventh embodiment at 620 MHz.
- FIG. 15 is a diagram showing an example of designing the antenna device of the seventh embodiment at 620 MHz.
- FIG. 16 is a diagram showing an example of designing the antenna device of the seventh embodiment at 620 MHz.
- FIG. 17 is a diagram showing an example of designing the antenna device of the seventh embodiment at 620 MHz.
- FIG. 18 is a diagram showing an example of designing the antenna device of the seventh embodiment at 620 MHz.
- FIG. 19 is a diagram showing an example of designing the antenna device of the seventh embodiment at 620 MHz.
- FIG. 20 is a diagram showing an example of designing the antenna device of the seventh embodiment at 620 MHz.
- FIG. 21 is a diagram showing an example of designing the antenna device of the seventh embodiment at 620 MHz.
- FIG. 22 is a diagram showing an example of designing the antenna device of the seventh embodiment at 620 MHz.
- FIG. 23 is a block diagram when the antenna device according to Embodiments 4 to 6 of the present invention is used in an electronic apparatus.
- FIG. 24 is a diagram showing another antenna apparatus according to Embodiment 8 of the present invention.
- FIG. 25 is a block diagram of a signal transmission method used in a general mobile phone.
- FIG. 26 is a block diagram of a signal transmission method according to the ninth embodiment of the present invention.
- FIG. 27 is a block diagram of a signal transmission scheme according to Embodiment 10 of the present invention.
- FIG. 28 is a block diagram of a signal transmission scheme according to Embodiment 11 of the present invention.
- FIG. 29 is a diagram showing a cross-sectional shape of a two-terminal pair line used in the signal transmission system according to the eleventh embodiment of the present invention.
- FIG. 30 is a diagram showing a cross-sectional shape of a two-terminal pair line used in the signal transmission system according to the eleventh embodiment of the present invention.
- FIG. 31 is a diagram showing another cross-sectional shape of a two-terminal pair line used in the signal transmission system according to the eleventh embodiment of the present invention.
- FIG. 32 is a diagram showing another cross-sectional shape of a two-terminal pair line used in the signal transmission method according to the eleventh embodiment of the present invention.
- FIG. 33 is a diagram showing an example of designing the signal transmission method of the twelfth embodiment at 620 MHz.
- FIG. 34 is a diagram showing an example of designing the signal transmission method of the twelfth embodiment at 620 MHz.
- FIG. 35 is a diagram showing an example of designing the signal transmission method of the twelfth embodiment at 620 MHz.
- FIG. 36 is a diagram showing an example of designing the signal transmission method of the twelfth embodiment at 620 MHz.
- FIG. 37 is a diagram showing an example of designing the signal transmission method of the twelfth embodiment at 620 MHz.
- FIG. 38 is a diagram illustrating an example of designing the signal transmission method according to the twelfth embodiment at 620 MHz.
- FIG. 39 is a diagram showing an example of designing the signal transmission method of the twelfth embodiment at 620 MHz.
- FIG. 40 is a diagram showing an example of designing the signal transmission method of the twelfth embodiment at 620 MHz.
- FIG. 41 is a diagram showing an example of designing the signal transmission method of the twelfth embodiment at 620 MHz.
- FIG. 42 is a diagram showing an example of designing the signal transmission method of the twelfth embodiment at 620 MHz.
- FIG. 43 is a block diagram of a conventional switch duplexer.
- FIG. 1 is a block diagram of a signal demultiplexer according to Embodiment 1 of the present invention.
- the signal branching filter 1 according to the first embodiment is connected to a network 6 having at least four terminals of a first terminal 2, a second terminal 3, a third terminal 4, and a fourth terminal 5.
- This is a signal branching filter 1.
- the first line 7 is connected to the first terminal 2 of the network 6,
- the second line 8 is connected to the second terminal 3 of the network 6, and the third terminal 4 is connected to the network 6.
- the third line 9 is connected to the first terminal 7 and the fourth line 10 is connected to the fourth terminal 5 of the network 6.
- the other of the first line 7 and the other of the second line 8 are Connected at the first intersection 11, the other of the third line 9 and the other of the fourth line 10 are connected at the second intersection 12.
- the signal branching filter 1 includes a first matching circuit 13 and a first phase shifter 17 that are connected in the middle of the first line 7, and a second that is connected in the middle of the second line 8.
- a fourth phase shifter 20 is connected.
- a first load circuit 21 is connected between the first intersection 11 and the ground, and a second load circuit 22 is connected between the second intersection 12 and the ground.
- the network 6 has a fifth terminal 23, a sixth terminal 24, a seventh terminal 25, and an eighth terminal 26.
- the phase difference between the phase of the signal appearing on the second intersection 12 side of the third line 9 and the phase of the signal appearing on the second intersection 12 side of the fourth line 10. Is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the phase difference from the phase is also approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the lengths of the first line 7, the second line 8, the third line 9, and the fourth line 10, the first matching circuit 13, the second matching circuit 14, and the third matching circuit 15 are set so as to satisfy the above-described conditions.
- the fourth matching circuit 16, the first phase shifter 17, the second phase shifter 18, the third phase shifter 19, and the fourth phase shifter 20 are designed to have appropriate values.
- the signal transmitted from the first load circuit 21 includes the phase of the signal appearing on the second intersection 12 side of the third line 9 and the phase of the signal appearing on the second intersection 12 side of the fourth line 10. Is approximately 180 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0), and therefore, it does not propagate from the second intersection 12 to the second load circuit 22 side.
- the signal transmitted from the second load circuit 22 also has the phase of the signal appearing on the first intersection 11 side of the first line 7 and the phase of the signal appearing on the first intersection 11 side of the second line 8. Since the phase difference is approximately 180 ° ⁇ 360 ° * n (n is an integer equal to or greater than 0), the phase difference does not generally propagate from the first intersection 11 to the first load circuit 21 side.
- the first load circuit 21 and the second load circuit 22 can exchange signals with the circuit network 6 independently of each other. That is, the first load circuit 21 and the second load circuit 22 can exchange signals independently of each other without having to make a temporal or frequency selection.
- the circuit 15, the fourth matching circuit 16, the first phase shifter 17, the second phase shifter 18, the third phase shifter 19, and the fourth phase shifter 20 may be designed.
- the absolute value of the amplitude of the signal appearing on the first intersection 11 side of the first line 7 and the signal appearing on the first intersection 11 side of the second line 8 are shown.
- the third matching circuit 15 and the fourth matching circuit 16, and the first phase shifter 17, the second phase shifter 18, the third phase shifter 19, and the fourth phase shifter 20 may be designed. Thereby, the advantageous effect that the isolation between the 1st load circuit 21 and the 2nd load circuit 22 can be made still higher is acquired.
- the phase of the signal appearing on the first intersection 11 side of the first line 7 and the second The line lengths of the first line 7 and the second line 8 so that the difference from the phase of the signal appearing on the first intersection 11 side of the line 8 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the first matching circuit 13, the second matching circuit 14, the first phase shifter 17, and the second phase shifter 18 may be designed.
- the phase difference is zero. Therefore, when a signal having the same phase and the same amplitude is input to the first terminal 2 and the second terminal 3, the phase of the signal appearing on the first intersection 11 side of the first line 7 and the second Since the difference from the phase of the signal appearing on the first intersection 11 side of the line 8 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more), the current of the common mode signal at the first intersection 11 Are canceled out, and the signal in the common mode does not propagate from the first intersection 11 to the first load circuit side.
- the phase of the signal appearing on the first intersection 11 side of the first line 7 when a signal having the same phase and the same amplitude is input to the first terminal 2 and the second terminal 3, the phase of the signal appearing on the first intersection 11 side of the first line 7;
- the signal demultiplexer 1 By designing the signal demultiplexer 1 so that the difference from the phase of the signal appearing on the first intersection 11 side of the second line 8 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more). Only the differential mode signal generated between the first terminal 2 and the second terminal 3 can be selected and propagated to the first load circuit 21.
- the phase of the signal appearing on the first intersection 11 side of the first line 7 and the second When a signal is input from the first intersection point 11 under the condition that the difference from the phase of the signal appearing on the first intersection point 11 side of the line 8 is approximately 180 ⁇ 360 degrees * n (n is an integer of 0 or more)
- n is an integer of 0 or more
- the first The difference between the phase change amount from the terminal 2 to the second intersection 12 and the phase change amount from the second terminal 3 to the second intersection 12 is zero. That is, the current of the common mode signal generated between the first terminal 2 and the second terminal 3 is added in phase at the second intersection 12 and is generally propagated from the second intersection 12 to the second load circuit 22 side. Go.
- the current of the differential mode signal generated between the first terminal 2 and the second terminal 3 is added and canceled in the opposite phase at the second intersection 12, and the second load circuit 22 starts from the second intersection 12. It is not propagated to the side. Therefore, the differential mode signal generated between the first terminal 2 and the second terminal 3 is propagated only to the first load circuit 21 side, and between the first terminal 2 and the second terminal 3. The generated common mode signal is propagated only to the second load circuit 22 side.
- the signal duplexer 1 can separately extract the signals in the two modes generated between the first terminal 2 and the second terminal 3.
- the amplitude of the signal appearing on the first intersection 11 side of the first line 7 is used.
- the first line 7 and the second line 8 and the first matching circuit so that the absolute value of the first line 7 and the absolute value of the amplitude of the signal appearing on the first intersection 11 side of the second line 8 are substantially the same.
- the second matching circuit 14, the first phase shifter 17, and the second phase shifter 18 may be designed. Thereby, the current of the common mode signal appearing at the first intersection 11 can be canceled more accurately, and the ratio of the differential mode signal component of the signal propagating from the first intersection 11 to the first load circuit 21 is improved. You can make it.
- the third line 9 is connected to the second intersection 12 side.
- the line lengths of the third line 9 and the fourth line 10 so that the absolute value of the amplitude of the appearing signal and the absolute value of the amplitude of the signal appearing on the second intersection 12 side of the fourth line 10 are substantially the same.
- the third matching circuit 15, the fourth matching circuit 16, the third phase shifter 19, and the fourth phase shifter 20 may be designed. Thereby, the current of the differential mode signal appearing at the second intersection 12 can be canceled more accurately, and the ratio of the common mode signal component of the signal propagating from the second intersection 12 to the second load circuit 22 is improved. You can make it.
- the amount of phase change from the first terminal 2 to the first intersection 11 is approximately 90 ° ⁇ 360 ° * n (n is an integer of 0 or more), and the phase change from the second terminal 3 to the first intersection 11
- the first phase shifter 17 and the second phase shifter 18 may be designed.
- the amount of phase change from the first terminal 2 to the first intersection 11 is approximately 90 ° ⁇ 360 ° * n (n is And the amount of phase change from the second terminal 3 to the first intersection 11 is approximately ⁇ 90 degrees ⁇ 360 degrees * n (n is an integer greater than or equal to 0). Will cancel the common mode signal.
- the first intersection point 11 is a virtually grounded location. Since the phase change amounts from the first intersection 11 virtually grounded to the first terminal 2 and the second terminal 3 are 90 degrees and ⁇ 90 degrees, respectively, the first terminal 2 and the second terminal 3 The input impedance when viewing the first intersection 11 side is infinite.
- the common mode signal generated between the first terminal 2 and the second terminal 3 does not propagate to the first intersection 11 side, but propagates to the second intersection 12 side. .
- the ratio of the common mode signal to the differential mode signal propagating to the second load circuit 22 can be further improved, and the ratio of the differential mode signal to the common mode signal propagating to the first load circuit 21 can be improved. Can be further improved.
- the amount of phase change from the first terminal 2 to the second intersection 12 is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more), and the phase change from the second terminal 3 to the second intersection 12
- the lengths of the third line 9 and the fourth line 10, the third matching circuit 15, and the fourth matching circuit 16 are set so that the amount is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more).
- the third phase shifter 17 and the fourth phase shifter 18 may be designed.
- the second intersection 12 is a virtually grounded location.
- the phase change amounts from the virtually intersected second intersection 12 to the first terminal 2 and the second terminal 3 are both 90 degrees, the second intersection from the first terminal 2 and the second terminal 3 respectively.
- the input impedance is infinite. Therefore, the differential mode signal generated between the first terminal 2 and the second terminal 3 does not generally propagate to the second intersection 12 side but propagates to the first intersection 11 side. . Accordingly, the ratio of the differential mode signal to the common mode signal propagating to the first load circuit 21 can be further improved, and the ratio of the common mode signal to the differential mode signal propagating to the second load circuit 22 can be improved. Can be further improved.
- the amount of phase change from the third terminal 4 to the second intersection 12 is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more) and the phase change from the fourth terminal 5 to the second intersection 12
- the lengths of the third line 9 and the fourth line 10, the third matching circuit 15, and the fourth matching circuit 16 are set so that the amount is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more).
- the third phase shifter 19 and the fourth phase shifter 20 may be designed.
- the second intersection 12 is a virtually grounded location. Since the phase change amounts from the virtually intersected second intersection 12 to the third terminal 4 and the fourth terminal 5 are both 90 degrees, the second intersection from the third terminal 4 and the fourth terminal 5 respectively.
- the input impedance is infinite.
- the differential mode signal generated between the third terminal 4 and the fourth terminal 5 does not generally propagate to the second intersection 12 side but propagates to the first intersection 11 side. Accordingly, the ratio of the differential mode signal to the common mode signal propagating to the first load circuit 21 can be further improved, and the ratio of the common mode signal to the differential mode signal propagating to the second load circuit 22 can be improved. Can be further improved.
- a configuration in which at least one of the phase shifters 20 is eliminated may be employed.
- the transmission loss in the first line 7, the second line 8, the third line 9, and the fourth line 10 can be reduced, and the number of necessary parts can be reduced, thereby reducing the size and weight. it can.
- a matching circuit may be connected between at least one of the first intersection 11 and the first load circuit 21 and between the second intersection 12 and the second load circuit 22.
- the matching state between the signal branching filter 1 and the first load circuit 21 of the present embodiment and between the signal branching filter 1 and the second load circuit 22 can be improved,
- the reflection loss between them can be reduced, and as a result, the communication quality of the electronic device can be improved.
- the first matching circuit 13, the second matching circuit 14, the third matching circuit 15, the fourth matching circuit 16, the first phase shifter 17, the second phase shifter 18, the third phase shifter 19, and the fourth phase shifter 20 Is basically designed by a reactance element circuit, but when a signal is input from the first intersection 11, the absolute value of the amplitude of the signal appearing on the second intersection 12 side of the third line 9 and the fourth In order to satisfy the condition that the absolute value of the amplitude of the signal appearing on the second intersection 12 side of the line 10 is the same, a resistance element or an amplifier circuit (for example, the first line 7 has a transmission path and a reception path).
- the circuit may be designed with a circuit including a transmission amplifier circuit, a reception amplifier circuit, and the like.
- signals are input / output from the fifth terminal 23, the sixth terminal 24, the seventh terminal 25, and the eighth terminal 26.
- the number of input / output terminals is not limited to this. It is sufficient that a signal is input / output from at least one input / output terminal.
- FIG. 2 is a block diagram of a signal demultiplexer according to Embodiment 2 of the present invention.
- symbol is described and it demonstrates below centering on a different structure.
- the signal demultiplexer 1 is a signal demultiplexer 1 connected to a circuit network 6 having at least three terminals, one of which is connected to the first terminal 2 of the circuit network 6.
- the other of the first line 7 and the other of the second line 8 are connected to the first intersection 11.
- the phase of the signal appearing on the first intersection 11 side of the first line 7 and the phase of the signal appearing on the first intersection 11 side of the second line 8 are compared.
- the second matching circuit 14 and the third matching circuit 15, and the first phase shifter 17, the second phase shifter 18, and the third phase shifter 19 are designed.
- the signal transmitted from the first load circuit 21 is canceled at the other side of the third line 9 and the third terminal, and therefore does not propagate to the second load circuit 22 side.
- the signal transmitted from the second load circuit 22 also has the phase of the signal appearing on the first intersection 11 side of the first line 7 and the phase of the signal appearing on the first intersection 11 side of the second line 8. Since the phase difference is approximately 180 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0), the phase difference does not generally propagate from the first intersection 11 to the first load circuit 21 side.
- the first load circuit 21 and the second load circuit 22 can exchange signals with the circuit network 6 independently of each other. That is, the first load circuit 21 and the second load circuit 22 can exchange signals independently of each other without having to make a temporal or frequency selection.
- the signal branching filter 1 according to the second embodiment is different from the signal branching filter 1 according to the first embodiment in the number of lines connecting the third terminal 4 and the second load circuit 22 and a matching circuit. Since the number and the number of phase shifters can be reduced, the size and weight can be reduced.
- the first matching circuit 13 and the second matching circuit 14 the first phase shifter 17 and the second phase shifter 18. And may be designed. Thereby, the advantageous effect that the isolation between the 1st load circuit 21 and the 2nd load circuit 22 can be made still higher is acquired.
- the phase of the signal appearing on the first intersection 11 side of the first line 7 and the second The line lengths of the first line 7 and the second line 8 so that the difference from the phase of the signal appearing on the first intersection 11 side of the line 8 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the first matching circuit 13, the second matching circuit 14, the first phase shifter 17, and the second phase shifter 18 may be designed.
- the phase difference is zero. Therefore, when a signal having the same phase and the same amplitude is input to the first terminal 2 and the second terminal 3, the phase of the signal appearing on the first intersection 11 side of the first line 7 and the second Since the difference from the phase of the signal appearing on the first intersection 11 side of the line 8 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more), the current of the common mode signal at the first intersection 11 Are canceled out, and the signal in the common mode does not propagate from the first intersection 11 to the first load circuit side.
- the differential mode signal when a differential mode signal is input between the first terminal 2 and the second terminal 3, the current level of the differential mode signal between the first terminal 2 and the second terminal 3.
- the phase difference is ⁇ 180 degrees. Therefore, when a signal having a phase difference of ⁇ 180 degrees and having the same amplitude is input to the first terminal 2 and the second terminal 3, the phase of the signal appearing on the first intersection 11 side of the first line 7. And the phase of the signal appearing on the first intersection 11 side of the second line 8 is approximately 0 ° ⁇ 360 ° * n (n is an integer of 0 or more), so that the differential mode at the first intersection 11 Thus, the differential mode signal generally propagates from the first intersection 11 to the first load circuit side.
- the phase of the signal appearing on the first intersection 11 side of the first line 7 when a signal having the same phase and the same amplitude is input to the first terminal 2 and the second terminal 3, the phase of the signal appearing on the first intersection 11 side of the first line 7;
- the signal demultiplexer 1 By designing the signal demultiplexer 1 so that the difference from the phase of the signal appearing on the first intersection 11 side of the second line 8 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more). Only the differential mode signal generated between the first terminal 2 and the second terminal 3 can be selected and propagated to the first load circuit 21.
- the phase of the signal appearing on the first intersection 11 side of the first line 7 and the second When a signal is input from the other side of the third line under the condition that the difference from the phase of the signal appearing on the first intersection 11 side of the line 8 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more)
- n is an integer of 0 or more
- the difference between the phase change amount from the first terminal 2 to the second intersection point 12 and the phase change amount from the second terminal 3 to the second intersection point 12 is zero.
- the current of the common mode signal generated between the first terminal 2 and the second terminal 3 is added in phase at the third terminal 4 and is generally propagated to the second load circuit 22 side.
- the current of the differential mode signal generated between the first terminal 2 and the second terminal 3 is added and canceled in the opposite phase at the third terminal 4, and is generally propagated to the second load circuit 22 side. Absent. Therefore, the differential mode signal generated between the first terminal 2 and the second terminal 3 is propagated only to the first load circuit 21 side, and between the first terminal 2 and the second terminal 3.
- the generated common mode signal is propagated only to the second load circuit 22 side.
- the signal demultiplexer 1 can separately extract the signals of the two modes generated between the first terminal 2 and the second terminal 3.
- the amplitude of the signal appearing on the first intersection 11 side of the first line 7 is used.
- the absolute value of the first line 7 and the absolute value of the amplitude of the signal appearing on the first intersection 11 side of the second line 8 are substantially the same.
- the second matching circuit 14, the first phase shifter 17, and the second phase shifter 18 may be designed.
- the current of the common mode signal appearing at the first intersection 11 can be canceled more accurately, and the differential mode signal with respect to the common mode signal of the signal propagating from the first intersection 11 to the first load circuit 21 side.
- the ratio of can be improved.
- the amount of phase change from the first terminal 2 to the first intersection 11 is approximately 90 ° ⁇ 360 ° * n (n is an integer of 0 or more), and the phase change from the second terminal 3 to the first intersection 11
- the first phase shifter 17 and the second phase shifter 18 may be designed.
- the amount of phase change from the first terminal 2 to the first intersection 11 is approximately 90 ° ⁇ 360 ° * n (n is And the amount of phase change from the second terminal 3 to the first intersection 11 is approximately ⁇ 90 degrees ⁇ 360 degrees * n (n is an integer greater than or equal to 0).
- the first intersection 11 is a virtually grounded location. Since the phase change amounts from the first intersection 11 virtually grounded to the first terminal 2 and the second terminal 3 are 90 degrees and ⁇ 90 degrees, respectively, the first terminal 2 and the second terminal 3 The input impedance when viewing the first intersection 11 side is infinite. Therefore, the common mode signal generated between the first terminal 2 and the second terminal 3 does not propagate to the first intersection 11 side, but propagates to the second intersection 12 side. .
- the ratio of the differential mode signal to the common mode signal propagating to the first load circuit 21 can be further improved, and the ratio of the common mode signal to the differential mode signal propagating to the second load circuit 22 can be improved. Can be further improved.
- At least one of the first matching circuit 13, the second matching circuit 14, the first phase shifter 17, and the second phase shifter 18 may be omitted. Thereby, the transmission loss in the first line 7 and the second line 8 can be reduced, the number of necessary parts can be reduced, and the size and weight can be reduced.
- a matching circuit may be connected between at least one of the first intersection 11 and the first load circuit 21 and between the third terminal 4 and the second load circuit 22.
- the first matching circuit 13, the second matching circuit 14, the first phase shifter 17, and the second phase shifter 18 are basically designed as reactance element circuits, but from the other end of the third line 9.
- the absolute value of the amplitude of the signal appearing on the first intersection 11 side of the first line 7 and the absolute value of the amplitude of the signal appearing on the first intersection 11 side of the second line 8 are substantially the same.
- a resistance element, an amplifier circuit for example, a configuration in which the first line 7 has a transmission path and a reception path, and each has a transmission amplifier circuit and a reception amplifier circuit, etc.
- signals are input / output from the fifth terminal 23, the sixth terminal 24, the seventh terminal 25, and the eighth terminal 26, but the number of input / output terminals is not limited to this. It is sufficient that a signal is input / output from at least one input / output terminal.
- FIG. 3 is a block diagram of the signal demultiplexer 1 according to the third embodiment of the present invention.
- symbol is described and it demonstrates below centering on a different structure.
- the signal branching filter 1 includes a first line 7 that is connected to the first terminal 2, a third line 9 that is connected to the first terminal 2,
- the second line 8 is connected to the second terminal 3 and the fourth line 10 is connected to the second terminal 3.
- the other of the first line 7 and the other of the second line 8 are Connected to one intersection 11, the other of the third line 9 and the other of the fourth line 10 are connected to the second intersection 12.
- the phase difference between the phase of the signal appearing on the second intersection 12 side of the third line 9 and the phase of the signal appearing on the second intersection 12 side of the fourth line 10 is
- the first matching circuit, the line lengths of the first line 7, the second line 8, the third line 9, and the fourth line 10 so as to be approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- 13 the second matching circuit 14, the third matching circuit 15, and the fourth matching circuit 16, and the first phase shifter 17, the second phase shifter 18, the third phase shifter 19, and the fourth phase shifter 20 are designed. ing.
- the signal transmitted from the first load circuit 21 includes the phase of the signal appearing on the second intersection 12 side of the third line 9 and the phase of the signal appearing on the second intersection 12 side of the fourth line 10. Is approximately 180 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0), and therefore, it does not propagate from the second intersection 12 to the second load circuit 22 side.
- the signal transmitted from the second load circuit 22 also has the phase of the signal appearing on the first intersection 11 side of the first line 7 and the phase of the signal appearing on the first intersection 11 side of the second line 8. Since the phase difference is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more), the phase difference does not generally propagate from the first intersection 11 to the first load circuit 21 side.
- the first load circuit 21 and the second load circuit 22 can exchange signals with the circuit network 6 independently of each other. That is, the first load circuit 21 and the second load circuit 22 can exchange signals independently of each other without having to make a temporal or frequency selection.
- the signal demultiplexer 1 according to the third embodiment can be connected to the network 6 with only two connection terminals, and the signal demultiplexer 1 shown in the first and second embodiments. Compared to the above, the structure can be simplified.
- the circuit 15, the fourth matching circuit 16, the first phase shifter 17, the second phase shifter 18, the third phase shifter 19, and the fourth phase shifter 20 may be designed.
- the absolute value of the amplitude of the signal appearing on the first intersection 11 side of the first line 7 and the signal appearing on the first intersection 11 side of the second line 8 are shown.
- the third matching circuit 15 and the fourth matching circuit 16, and the first phase shifter 17, the second phase shifter 18, the third phase shifter 19, and the fourth phase shifter 20 may be designed. Thereby, the advantageous effect that the isolation between the 1st load circuit 21 and the 2nd load circuit 22 can be made still higher is acquired.
- the phase of the signal appearing on the first intersection 11 side of the first line 7 and the second The line lengths of the first line 7 and the second line 8 so that the difference from the phase of the signal appearing on the first intersection 11 side of the line 8 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the first matching circuit 13, the second matching circuit 14, the first phase shifter 17, and the second phase shifter 18 may be designed.
- the phase of the signal appearing on the first intersection 11 side of the first line 7 when a signal having the same phase and the same amplitude is input to the first terminal 2 and the second terminal 3, the phase of the signal appearing on the first intersection 11 side of the first line 7;
- the difference between the phase of the signal appearing on the first intersection 11 side of the second line 8 to be approximately 180 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0)
- Only a differential mode signal generated between the second terminal 3 and the second terminal 3 can be selected and propagated to the first load circuit 21.
- the phase of the signal appearing on the first intersection 11 side of the first line 7 and the second When a signal is input from the first intersection point 11 under the condition that the difference from the phase of the signal appearing on the first intersection point 11 side of the line 8 is approximately 180 ⁇ 360 degrees * n (n is an integer of 0 or more)
- n is an integer of 0 or more
- the first The difference between the phase change amount from the terminal 2 to the second intersection 12 and the phase change amount from the second terminal 3 to the second intersection 12 is zero.
- the current of the common mode signal generated between the first terminal 2 and the second terminal 3 is added in phase at the second intersection 12 and is generally propagated from the second intersection 12 to the second load circuit 22 side. Go.
- the differential mode signal generated between the first terminal 2 and the second terminal 3 is propagated only to the first load circuit 21 side, and between the first terminal 2 and the second terminal 3.
- the generated common mode signal is generally propagated only to the second load circuit 22 side. That is, the signal demultiplexer 1 according to the third embodiment can separately extract the signals of the two modes generated between the first terminal 2 and the second terminal 3.
- the amplitude of the signal appearing on the first intersection 11 side of the first line 7 is used.
- the first line 7 and the second line 8 and the first matching circuit so that the absolute value of the first line 7 and the absolute value of the amplitude of the signal appearing on the first intersection 11 side of the second line 8 are substantially the same.
- the second matching circuit 14, the first phase shifter 17, and the second phase shifter 18 may be designed. Thereby, the current of the common mode signal appearing at the first intersection 11 can be canceled more accurately, and the differential mode signal with respect to the common mode signal of the signal propagating from the first intersection 11 to the first load circuit 21 side. The ratio of can be improved.
- the signal appearing on the second intersection 12 side of the third line 9 The line lengths of the third line 9 and the fourth line 10 and the third matching so that the absolute value of the amplitude and the absolute value of the amplitude of the signal appearing on the second intersection 12 side of the fourth line 10 are substantially the same.
- the circuit 15, the fourth matching circuit 16, the third phase shifter 19, and the fourth phase shifter 20 may be designed. As a result, the current of the differential mode signal appearing at the second intersection 12 can be canceled more accurately, and the common mode signal with respect to the differential mode signal of the signal propagating from the second intersection 12 to the second load circuit 22 side. The ratio of can be improved.
- the amount of phase change from the first terminal 2 to the first intersection 11 is approximately 90 ° ⁇ 360 ° * n (n is an integer of 0 or more), and the phase change from the second terminal 3 to the first intersection 11
- the first phase shifter 17 and the second phase shifter 18 may be designed.
- the amount of phase change from the first terminal 2 to the first intersection 11 is approximately 90 ° ⁇ 360 ° * n (n is And the amount of phase change from the second terminal 3 to the first intersection 11 is approximately ⁇ 90 degrees ⁇ 360 degrees * n (n is an integer greater than or equal to 0). Will cancel the common mode signal.
- the first intersection point 11 is a virtually grounded location. Since the phase change amounts from the first intersection 11 virtually grounded to the first terminal 2 and the second terminal 3 are 90 degrees and ⁇ 90 degrees, respectively, the first terminal 2 and the second terminal 3 The input impedance when viewing the first intersection 11 side is infinite.
- the common mode signal generated between the first terminal 2 and the second terminal 3 does not propagate to the first intersection 11 side, but propagates to the second intersection 12 side. .
- the ratio of the common mode signal to the differential mode signal propagating to the second load circuit 22 can be further improved, and the ratio of the differential mode signal to the common mode signal propagating to the first load circuit 21 can be improved. Can be further improved.
- the amount of phase change from the first terminal 2 to the second intersection 12 is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more), and the phase change from the second terminal 3 to the second intersection 12
- the lengths of the third line 9 and the fourth line 10, the third matching circuit 15, and the fourth matching circuit 16 are set so that the amount is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more).
- the third phase shifter 19 and the fourth phase shifter 20 may be designed.
- the second intersection 12 is a virtually grounded location. Since the phase change amounts from the virtually intersected second intersection 12 to the first terminal 2 and the second terminal 3 are both 90 degrees, the second intersection from the first terminal 2 and the second terminal 3 respectively. When looking at the 12th side, the input impedance is infinite.
- the differential mode signal generated between the first terminal 2 and the second terminal 3 does not generally propagate to the second intersection 12 side but propagates to the first intersection 11 side. Accordingly, the ratio of the differential mode signal to the common mode signal propagating to the first load circuit 21 can be further improved, and the ratio of the common mode signal to the differential mode signal propagating to the second load circuit 22 can be improved. Can be further improved.
- a configuration in which at least one of the phase shifters 20 is eliminated may be employed.
- the transmission loss in the first line 7, the second line 8, the third line 9, and the fourth line 10 can be reduced, and the number of necessary parts can be reduced, thereby reducing the size and weight. it can.
- a matching circuit may be connected between at least one of the first intersection 11 and the first load circuit 21 and between the second intersection 12 and the second load circuit 22.
- the first matching circuit 13, the second matching circuit 14, the third matching circuit 15, the fourth matching circuit 16, the first phase shifter 17, the second phase shifter 18, the third phase shifter 19, and the fourth phase shifter 20 Is basically designed by a reactance element circuit, but when a signal is input from the first intersection 11, the absolute value of the amplitude of the signal appearing on the second intersection 12 side of the third line 9 and the fourth In order to satisfy the condition that the absolute value of the amplitude of the signal appearing on the second intersection side 12 of the line 10 is substantially the same, a resistance element or an amplifier circuit (for example, the first line 7 has a transmission path and a reception path).
- Each circuit may be designed with a circuit including a transmission amplifier circuit, a reception amplifier circuit, and the like.
- signals are input / output from the fifth terminal 23, the sixth terminal 24, the seventh terminal 25, and the eighth terminal 26, but the number of input / output terminals is not limited to this. It is sufficient that a signal is input / output from at least one input / output terminal.
- Embodiment 4 an antenna device which is an example of an electronic apparatus using the signal branching filter of the present invention will be described.
- a diversity antenna used in a wireless terminal such as a general mobile phone will be described with reference to FIG.
- the antenna device using the signal branching filter of the present invention will be described.
- FIG. 4 is a conceptual diagram of a general diversity antenna.
- the mobile phone 4100 has a first antenna 4101 and a second antenna 4102 which are arranged at a certain distance.
- the first antenna 4101 and the second antenna 4102 are connected to the switch 4103, and the switch 4103 and the signal processing unit 4104 are further connected.
- Signals received by the first antenna 4101 and the second antenna 4102 are sent to the signal processing unit 4104 via the switch 4103, and are demodulated after being subjected to frequency conversion, noise removal, signal amplification, and the like in the signal processing unit 4104.
- the signal processing unit 4104 derives a signal quality value (for example, BER) of the demodulated signal, and then controls the state of the switch 4103 based on the derived signal quality value. Specifically, the signal processing unit 4104 compares the quality values of the signals received by the first antenna 4101 and the second antenna 4102 and switches the state of the switch 4103 for an antenna that can realize higher signal quality. select.
- a signal quality value for example, BER
- the first antenna 4101 and the second antenna 4102 need to be arranged apart from each other in order to ensure isolation between the antennas, and the first antenna 4101 and the switch 4103 are arranged.
- the signal line to be connected and the signal line to connect the second antenna 4102 and the switch 4103 need to be routed in the mobile phone 4100 for a long distance.
- the antenna device provides a diversity antenna that can input and output two signals that are isolated by one antenna.
- An antenna device includes an antenna element having a first terminal, a second terminal, a third terminal, and a fourth terminal, and an antenna device connected to the antenna element.
- the antenna device includes: a first line connected to the first terminal; a second line connected to the second terminal; a third line connected to the third terminal; A fourth line connected to one of the four terminals, the other of the first line and the other of the second line are connected at the first intersection, and the other of the third line and the other of the fourth line are the second. Connected at the intersection.
- the phase difference between the phase of the signal appearing on the second intersection side of the third line and the phase of the signal appearing on the second intersection side of the fourth line is approximately 180 degrees ⁇ 360 degrees * n (n is an integer of 0 or more).
- the antenna device using the signal demultiplexer of the present invention has such a configuration, when a signal is input from the first intersection, the phase of the signal appearing on the second intersection side of the third line, Since the phase difference from the phase of the signal appearing on the second intersection point side of the fourth line is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more), the isolator between the first intersection point and the second intersection point is I can take a general adjustment.
- the first intersection and the second intersection can exchange signals with the antenna element independently of each other. Therefore, using one antenna device, two isolated signals can be obtained. Input / output is possible. Accordingly, it is possible to provide a diversity antenna that can input and output two signals that are isolated by one antenna.
- FIG. 5 is a block diagram of an antenna device according to Embodiment 4 of the present invention.
- an antenna device 501 according to the fourth embodiment includes an antenna element 506 having at least four terminals of a first terminal 502, a second terminal 503, a third terminal 504, and a fourth terminal 505, and the antenna element 506.
- the first line 507 is connected to the first terminal 502
- the second line 508 is connected to the second terminal 503 of the antenna element 506,
- the third terminal 504 is connected to the third terminal 504 of the antenna element 506.
- the third line 509 and the fourth line 510, one of which is connected to the fourth terminal 505 of the antenna element 506, and the other of the first line 507 and the other of the second line 508 are at a first intersection 511.
- the other of the third line 509 and the other of the fourth line 510 are connected at the second intersection 512.
- the antenna device 501 of the fourth embodiment includes a first matching circuit 513 and a first phase shifter 517 connected in the middle of the first line 507, and a second matching circuit connected in the middle of the second line 508. 514, the second phase shifter 518, the third matching circuit 515 and the third phase shifter 519 connected in the middle of the third line 509, the fourth matching circuit 516 connected in the middle of the fourth line 510, and the fourth And a phase shifter 520.
- first load circuit 521 is connected between the first intersection 511 and the ground
- second load circuit 522 is connected between the second intersection 512 and the ground.
- the antenna element 506 has a fifth terminal 523, a sixth terminal 524, a seventh terminal 525, and an eighth terminal 526.
- the phase difference between the phase of the signal appearing on the second intersection point 512 side of the third line 509 and the phase of the signal appearing on the second intersection point 512 side of the fourth line 510. Is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the phase difference between the phase of the signal appearing on the first intersection 511 side of the first line 507 and the phase of the signal appearing on the first intersection 511 side of the second line 508 is also It is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the fourth matching circuit 516, the first phase shifter 517, the second phase shifter 518, the third phase shifter 519, and the fourth phase shifter 520 are designed to have appropriate values.
- the signal transmitted from the first load circuit 521 includes the phase of the signal appearing on the second intersection 512 side of the third line 509 and the phase of the signal appearing on the second intersection 512 side of the fourth line 510. Is approximately 180 ° ⁇ 360 ° * n (n is an integer equal to or greater than 0), and therefore, the phase difference does not generally propagate from the second intersection 512 to the second load circuit 522 side.
- phase difference is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more), the phase difference does not generally propagate from the first intersection 511 to the first load circuit 521 side.
- the signal does not propagate between the first load circuit 521 and the second load circuit 522, and isolation can be ensured between the first load circuit 521 and the second load circuit 522.
- the first load circuit 521 and the second load circuit 522 can exchange signals independently through the single antenna element 506.
- the first load circuit 521 and the second load circuit 522 can exchange signals independently of each other without being restricted in terms of time and frequency.
- the absolute value of the amplitude of the signal appearing on the second intersection point 512 side of the third line 509 and the second intersection point 512 side of the fourth line 510 are set.
- the lengths of the first line 507, the second line 508, the third line 509, and the fourth line 510, the first matching circuit 513, and the second matching are set so that the absolute values of the amplitudes of the appearing signals are substantially the same.
- the circuit 514, the third matching circuit 515, and the fourth matching circuit 516, and the first phase shifter 517, the second phase shifter 518, the third phase shifter 519, and the fourth phase shifter 520 may be designed.
- the line lengths of the first line 507, the second line 508, the third line 509, and the fourth line 510, the first matching circuit 513, and the absolute value of the amplitude of the signal appearing on the 511 side are substantially the same.
- the second matching circuit 514, the third matching circuit 515, and the fourth matching circuit 516, the first phase shifter 517, the second phase shifter 518, the third phase shifter 519, and the fourth phase shifter 520 are designed. Also good. Thereby, the advantageous effect that the isolation between the 1st load circuit 521 and the 2nd load circuit 522 can be made still higher is acquired.
- the line length, the first matching circuit 513, the second matching circuit 514, the first phase shifter 517, and the second phase shifter 518 may be designed.
- the phase difference is zero. Therefore, when a signal having the same phase and the same amplitude is input to the first terminal 502 and the second terminal 503, the phase of the signal appearing on the first intersection 511 side of the first line 507 Since the difference from the phase of the signal appearing on the first intersection 511 side of the second line 508 is approximately 180 ° ⁇ 360 ° * n (n is an integer equal to or greater than 0), The signal current is canceled out, and the signal in the common mode does not propagate from the first intersection 511 to the first load circuit side.
- phase difference of the current of the differential mode signal between the first terminal 502 and the second terminal 503 is ⁇ 180 degrees. Therefore, when a signal having a phase difference of ⁇ 180 degrees and an equal absolute value is input to the first terminal 502 and the second terminal 503, the signal appears on the first intersection 511 side of the first line 507.
- the first intersection 511 Since the difference between the phase of the signal and the phase of the signal appearing on the first intersection 511 side of the second line 508 is approximately 0 ° ⁇ 360 ° * n (n is an integer of 0 or more), the first intersection 511 The currents of the differential mode signals are added together, and the signal generally propagates from the first intersection 511 to the first load circuit side.
- the signal demultiplexer 501 is designed so that the difference between the phase and the phase of the signal appearing on the first intersection 511 side of the second line 508 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- n is an integer of 0 or more.
- the phase of the signal appearing on the first intersection 511 side of the first line 507 The signal is input from the first intersection 511 under the condition that the difference from the phase of the signal appearing on the first intersection 511 side of the second line 508 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- n is an integer of 0 or more.
- the case where the phase difference between the phase of the signal appearing on the second intersection 512 side of the third line 509 and the phase of the signal appearing on the second intersection 512 side of the fourth line 510 is approximately 180 degrees.
- the difference between the phase change amount from the first terminal 502 to the second intersection 512 and the phase change amount from the second terminal 503 to the second intersection 512 is zero. That is, the current of the common mode signal generated between the first terminal 502 and the second terminal 503 is added in phase at the second intersection 512 and is generally propagated from the second intersection 512 to the second load circuit 522 side. Go.
- the antenna device 501 of the fourth embodiment can separately extract two modes of signals generated between the first terminal 502 and the second terminal 503 via the antenna element 506.
- the first matching circuit 513, the second matching circuit 514, the first phase shifter 517, and the second phase shifter 518 may be designed.
- the current of the common mode signal appearing at the first intersection 511 can be canceled more accurately, and the differential mode signal with respect to the common mode signal of the signal propagating from the first intersection 511 to the first load circuit 521 side.
- the ratio of components can be improved.
- the second line 509 has a second intersection 512 side.
- the line lengths of the third line 509 and the fourth line 510 so that the absolute value of the amplitude of the appearing signal and the absolute value of the amplitude of the signal appearing on the second intersection 512 side of the fourth line 510 are substantially the same.
- the third matching circuit 515, the fourth matching circuit 516, the third phase shifter 519, and the fourth phase shifter 520 may be designed.
- the current of the differential mode signal appearing at the second intersection 512 can be canceled more accurately, and the common mode signal relative to the differential mode signal propagating from the second intersection 512 to the second load circuit 522 side can be obtained.
- the ratio of components can be improved.
- the amount of phase change from the first terminal 502 to the first intersection 511 is approximately 90 ° ⁇ 360 ° * n (n is an integer of 0 or more), and the phase change from the second terminal 503 to the first intersection 511
- the first phase shifter 517 and the second phase shifter 518 may be designed.
- the amount of phase change from the first terminal 502 to the first intersection 511 is approximately 90 ° ⁇ 360 ° * n (n is Since the phase change amount from the second terminal 503 to the first intersection 511 is approximately ⁇ 90 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0), the first intersection 511 Will cancel the common mode signal. That is, for the common mode signal, the first intersection point 511 is a virtually grounded location.
- the first terminal 2 and the second terminal 503 Since the phase change amounts from the first intersection 511 virtually grounded to the first terminal 502 and the second terminal 503 are 90 degrees and ⁇ 90 degrees, respectively, the first terminal 2 and the second terminal 503 The input impedance when viewing the first intersection 511 side is infinite. Therefore, the common mode signal generated between the first terminal 502 and the second terminal 503 does not propagate to the first intersection point 511 side, but propagates to the second intersection point 512 side. Thereby, the ratio of the common mode signal propagating to the second load circuit 522 to the differential mode signal can be further improved. Further, the ratio of the differential mode signal to the common mode signal propagating to the first load circuit 521 can be improved.
- the first intersection 511 side of the first line 507 The line lengths of the first line 507 and the second line 508 are such that the absolute value of the amplitude of the signal appearing on the first line 508 and the absolute value of the amplitude of the signal appearing on the first intersection 511 side of the second line 508 are substantially the same.
- the first matching circuit 513, the second matching circuit 514, the first phase shifter 517, and the second phase shifter 518 may be designed.
- the current of the common mode signal appearing at the first intersection 511 can be canceled more accurately, and the differential mode signal with respect to the common mode signal of the signal propagating from the first intersection 511 to the first load circuit 521 side.
- the ratio of can be improved.
- a common mode signal having a low correlation coefficient generated in the antenna element 506 and a differential signal can be accurately separated, and a small diversity antenna capable of obtaining two signals having a low correlation coefficient can be realized. .
- the amount of phase change from the first terminal 502 to the second intersection 512 is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more), and the phase change from the second terminal 503 to the second intersection 512
- the lengths of the third line 509 and the fourth line 510, the third matching circuit 515, and the fourth matching circuit 516 are set so that the amount is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more).
- the third phase shifter 519 and the fourth phase shifter 520 may be designed.
- the differential mode signal is generated between the first terminal 502 and the second terminal 503, the amount of phase change from the first terminal 2 to the second intersection 12 and the second terminal 3 to the second terminal Since the phase change amount up to the intersection point 12 is the same amount, the differential mode signal is canceled at the second intersection point 512. That is, for the differential mode signal, the second intersection 512 is a virtually grounded location. Since the phase change amounts from the second intersection 512 to the first terminal 502 and the second intersection 512 to the second terminal 503, both of which are virtually grounded, are 90 degrees, the first terminal 502 and the second terminal 503 The input impedance when viewing the second intersection 512 side is infinite.
- the differential mode signal generated between the first terminal 502 and the second terminal 503 does not generally propagate to the second intersection 512 side but propagates to the first intersection 511 side.
- the ratio of the differential mode signal to the common mode signal propagating to the first load circuit 521 can be improved, and the ratio of the common mode signal to the differential mode signal propagating to the second load circuit 522 can be increased. Can be improved.
- the current of the differential mode signal appearing at the second intersection 512 can be more accurately canceled, and the differential mode signal of the common mode signal propagating from the second intersection 512 to the second load circuit 522 side can be obtained.
- the ratio to can be improved. Accordingly, a common mode signal having a low correlation coefficient generated in the antenna element 506 and a differential mode signal can be accurately separated, and a small diversity antenna capable of obtaining two signals having a low correlation coefficient can be realized.
- the phase change amount from the third terminal 504 to the second intersection point 511 is approximately +90 degrees ⁇ 180 degrees * n (n is an integer of 0 or more), and the phase change amount from the fourth terminal 505 to the second intersection point 512 is
- the lengths of the third line 509 and the fourth line 510, the third matching circuit 515, and the fourth matching circuit 516 are set so that the amount is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more).
- the third phase shifter 519 and the fourth phase shifter 520 may be designed.
- the second intersection 512 is a virtually grounded location. Since the phase change amounts from the virtually grounded second intersection 512 to the third terminal 504 and the fourth terminal 505 are both 90 degrees, the second intersection from the third terminal 504 and the fourth terminal 505, respectively.
- the input impedance when looking at the 512 side becomes infinite.
- the differential mode signal generated between the third terminal 504 and the fourth terminal 505 does not generally propagate to the second intersection 512 side but propagates to the first intersection 511 side. Accordingly, the ratio of the differential mode signal to the common mode signal propagating to the first load circuit 521 can be further improved, and the ratio of the common mode signal to the differential mode signal propagating to the second load circuit 522 can be improved. Can be further improved.
- the second intersection of the third line 509 is obtained.
- the length, the third matching circuit 515, the fourth matching circuit 516, the third phase shifter 519, and the fourth phase shifter 520 may be designed.
- the current of the differential mode signal appearing at the second intersection 512 can be more accurately canceled, and the ratio of the common mode signal propagating from the second intersection 512 to the second load circuit 522 side with respect to the differential mode signal is increased. Can be improved.
- a common mode signal having a low correlation coefficient generated in the antenna element 506 and a differential signal can be accurately separated, and a small diversity antenna capable of obtaining two signals having a low correlation coefficient can be realized.
- a matching circuit may be connected between at least one of the first intersection 511 and the first load circuit 521 and between the second intersection 512 and the second load circuit 522.
- the first matching circuit 513, the second matching circuit 514, the third matching circuit 515, the fourth matching circuit 516, the first phase shifter 517, the second phase shifter 518, the third phase shifter 519, and the fourth phase shifter 520 Is basically designed by a circuit of a reactance element. However, when a signal is input from the first intersection point 511, the absolute value of the amplitude of the signal appearing on the second intersection point 512 side of the third line 509 and the absolute value of the amplitude of the signal appearing on the second intersection point 512 side of the fourth line 510.
- a resistance element or an amplifier circuit for example, the first line 7 has two paths, a transmission path and a reception path, and each path is a transmission amplifier circuit. Or a circuit having a receiving amplifier circuit, etc.).
- FIG. 6 is a block diagram of an antenna apparatus according to Embodiment 5 of the present invention.
- FIG. 6 is a block diagram of an antenna apparatus according to Embodiment 5 of the present invention.
- symbol is described and it demonstrates below centering on a different structure.
- an antenna device 601 according to Embodiment 605 includes an antenna element 606 having at least three terminals, a first line 607 that is connected to the first terminal 602 of the antenna element 606, and a second antenna element 606.
- the second line 608, one of which is connected to the terminal 603, and the third line 609, one of which is connected to the third terminal 604 of the antenna element 606, have the other of the first line 607 and the other of the second line 608. Is connected to the first intersection 611.
- the phase of the signal appearing on the first intersection 611 side of the first line 607 and the phase of the signal appearing on the first intersection 611 side of the second line 608 are compared.
- the second matching circuit 614 and the third matching circuit 615, and the first phase shifter 617, the second phase shifter 618, and the third phase shifter 619 are designed.
- the signal transmitted from the first load circuit 621 is canceled at the other side of the third line 609 and the third terminal 604, and therefore does not generally propagate to the second load circuit 622 side.
- the phase of the signal appearing on the first intersection 611 side of the first line 607 and the phase of the signal appearing on the first intersection 611 side of the second line 608 are also shown. Since the phase difference is approximately 180 ° ⁇ 360 ° * n (n is an integer equal to or greater than 0), the phase difference does not generally propagate from the first intersection 611 to the first load circuit 621 side.
- the antenna device 601 of the fifth embodiment is different from the antenna device of the fourth embodiment in the number of lines connecting the third terminal 604 and the second load circuit 622, the number of matching circuits, and the number of phase shifters. Since the number can be reduced, the size and weight can be reduced.
- the absolute value of the amplitude of the signal appearing on the first intersection 611 side of the first line 607 and the amplitude of the signal appearing on the first intersection 611 side of the second line 608 are shown.
- the first line 607 and the second line 608, the first matching circuit 613 and the second matching circuit 614, the first phase shifter 617 and the second phase shifter 618. And may be designed. Thereby, the advantageous effect that the isolation between the 1st load circuit 621 and the 2nd load circuit 622 can be made still higher is acquired.
- the phase of the signal appearing on the first intersection 611 side of the first line 607 The first line 607 and the second line 608 so that the difference from the phase of the signal appearing on the first intersection 611 side of the second line 608 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the line length, the first matching circuit 613, the second matching circuit 614, the first phase shifter 617, and the second phase shifter 618 may be designed.
- the phase difference is zero. Therefore, when a signal having the same phase and the same amplitude is input to the first terminal 602 and the second terminal 603, the phase of the signal appearing on the first intersection 611 side of the first line 607 Since the difference from the phase of the signal appearing on the first intersection 611 side of the second line 608 is approximately 180 ° ⁇ 360 ° * n (n is an integer equal to or greater than 0), The signal current is canceled out, and the signal in the common mode does not propagate from the first intersection 611 to the first load circuit 621 side.
- the first intersection 611 Since the difference between the phase of the signal and the phase of the signal appearing on the first intersection 611 side of the second line 608 is approximately 0 ° ⁇ 360 ° * n (n is an integer of 0 or more), the first intersection 611 The differential mode signal currents are added together, and the differential mode signal propagates generally from the first intersection 611 to the first load circuit 621 side.
- the first Only a differential mode signal generated between the terminal 602 and the second terminal 603 can be selected and propagated to the first load circuit 621.
- the phase of the signal appearing on the first intersection 611 side of the first line 607 when a signal having the same phase and the same absolute value of amplitude is input to the first terminal 602 and the second terminal 603, the phase of the signal appearing on the first intersection 611 side of the first line 607 ,
- the condition that the phase difference of the signal appearing on the first intersection 611 side of the second line 608 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more), and the signal from the other of the third line 609 Considering the condition that the phase difference between the phase of the signal appearing on the first intersection 611 side of the first line 607 and the phase of the signal appearing on the first intersection 61 side of the second line 608 is approximately 180 degrees when input.
- the difference between the phase change amount from the first terminal 602 to the third terminal 604 and the phase change amount from the second terminal 603 to the third terminal 604 is zero.
- the current of the common mode signal generated between the first terminal 602 and the second terminal 603 is added in phase at the third terminal 604 and is generally propagated to the second load circuit 622 side.
- the current of the differential mode signal generated between the first terminal 602 and the second terminal 603 is added and canceled in the opposite phase at the third terminal 604 and is generally propagated to the second load circuit 622 side. Absent.
- the differential mode signal generated between the first terminal 602 and the second terminal 603 is propagated to only the first load circuit 621 side, and conversely, the first terminal 602 and the second terminal 603
- the common mode signal generated during the period is propagated only to the second load circuit 622 side.
- the antenna device 601 can separately extract two modes of signals generated between the first terminal 602 and the second terminal 603.
- signals having the same phase and the same absolute value of amplitude are input to the first terminal 602 and the second terminal 603, they appear on the first intersection 611 side of the first line 607.
- the line lengths of the first line 607 and the second line 608 are set so that the absolute value of the amplitude of the signal and the absolute value of the amplitude of the signal appearing on the first intersection 611 side of the second line 608 are substantially the same.
- the first matching circuit 613, the second matching circuit 614, the first phase shifter 617, and the second phase shifter 618 may be designed.
- the current of the common mode signal appearing at the first intersection 611 can be canceled more accurately, and the ratio of the differential mode signal component of the signal propagating from the first intersection 611 to the first load circuit 621 is improved. You can make it. Accordingly, it is possible to realize a diversity antenna capable of accurately separating a common mode signal having a low correlation coefficient generated in the antenna element 606 and a differential signal, and obtaining two signals having a low correlation coefficient.
- the phase change amount from the first terminal 602 to the first intersection point 611 is approximately 90 ° ⁇ 360 ° * n (n is an integer of 0 or more), and the phase change amount from the second terminal 603 to the first intersection point 611 is The line lengths of the first line 607 and the second line 608, the first matching circuit 613, the second matching circuit 614, and the like so that the amount is approximately ⁇ 90 degrees ⁇ 360 degrees * n (n is an integer of 0 or more)
- the first phase shifter 617 and the second phase shifter 618 may be designed.
- the amount of phase change from the first terminal 602 to the first intersection 611 is approximately 90 ° ⁇ 360 ° * n (n is Since the phase change amount from the second terminal 603 to the first intersection 611 is approximately ⁇ 90 degrees ⁇ 360 degrees * n (n is an integer greater than or equal to 0), the first intersection 611 Will cancel the common mode signal.
- the first intersection point 611 is virtually grounded. Since the phase change amounts from the first intersection 611 virtually grounded to the first terminal 602 and the second terminal 603 are 90 degrees and ⁇ 90 degrees, respectively, the first terminal 602 and the second terminal 603 The input impedance when viewing the first intersection 611 side is infinite. Therefore, the common mode signal generated between the first terminal 602 and the second terminal 603 does not propagate to the first intersection 611 side but propagates to the second intersection 612 side.
- the ratio of the common mode signal propagating to the second load circuit 622 to the differential mode signal can be further improved, and the ratio of the differential mode signal propagating to the first load circuit 621 to the common mode signal can be improved. Can be further improved.
- the first line 607 on the first intersection 611 side The line lengths of the first line 607 and the second line 608 are set so that the absolute value of the amplitude of the signal appearing on the first line 608 and the absolute value of the amplitude of the signal appearing on the first intersection 611 side of the second line 608 are substantially the same.
- the first matching circuit 613, the second matching circuit 614, the first phase shifter 617, and the second phase shifter 618 may be designed.
- the current of the common mode signal appearing at the first intersection point 611 can be canceled more accurately, and the ratio of the differential mode signal propagating from the first intersection point 611 to the first load circuit 621 side with respect to the common mode signal. Can be improved.
- a common mode signal having a low correlation coefficient generated in the antenna element 606 and a differential signal can be accurately separated, and a small diversity antenna capable of obtaining two signals having a low correlation coefficient can be realized.
- At least one of the first matching circuit 613, the second matching circuit 614, the first phase shifter 617, and the second phase shifter 618 may be omitted.
- transmission loss in the first line 607 and the second line 608 can be reduced, the number of necessary parts can be reduced, and miniaturization and weight reduction can be achieved.
- a matching circuit may be connected between at least one of the first intersection 611 and the first load circuit 621 and between the third terminal 604 and the second load circuit 622.
- the first matching circuit 613, the second matching circuit 614, the first phase shifter 617, and the second phase shifter 618 are basically designed as a reactance element circuit. However, when a signal is input from the other side of the third line 609, the absolute value of the amplitude of the signal appearing on the first intersection 611 side of the first line 607 and the amplitude of the signal appearing on the first intersection 611 side of the second line 608.
- a resistance element or an amplifier circuit for example, the first line 607 has a transmission path and a reception path.
- the circuit may be designed with a circuit including a configuration such as Thereby, high isolation characteristics between the first load circuit 621 and the second load circuit 622 can be realized, and transmission / reception characteristics of the electronic device can be improved.
- FIG. 7 is a block diagram of an antenna device 701 according to Embodiment 6 of the present invention.
- symbol is described and it demonstrates below centering on a different structure.
- the antenna device 701 includes an antenna element 706 having at least two terminals of a first terminal 702 and a second terminal 703, and a first line 707, one of which is connected to the first terminal 702.
- the other of the first line 707 and the other of the second line 708 are connected to the first intersection 711, and the other of the third line 709 and the other of the fourth line 710 are connected to the second intersection 712. .
- the phase difference between the phase of the signal appearing on the second intersection 712 side of the third line 709 and the phase of the signal appearing on the second intersection 712 side of the fourth line 710 is
- the lengths of the first line 707, the second line 708, the third line 709, and the fourth line 710, and the first matching circuit so as to be approximately 180 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0) 713, the second matching circuit 714, the third matching circuit 715, and the fourth matching circuit 716, the first phase shifter 717, the second phase shifter 718, the third phase shifter 719, and the fourth phase shifter 720 are designed. ing.
- the signal transmitted from the first load circuit 721 includes the phase of the signal appearing on the second intersection 712 side of the third line 709 and the phase of the signal appearing on the second intersection 712 side of the fourth line 710. Is approximately 180 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0), and therefore, it does not propagate from the second intersection 712 to the second load circuit 722 side.
- phase difference is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more), the phase difference does not generally propagate from the first intersection 711 to the first load circuit 721 side.
- the first load circuit 721 and the second load circuit 722 can exchange signals independently of each other via the antenna element 706.
- the first load circuit 721 and the second load circuit 722 can exchange signals independently of each other without having to make a time and frequency selection.
- the antenna device 701 according to the sixth embodiment can be connected to the antenna element 706 with only two connection terminals as compared with the antenna device according to the fourth embodiment, thereby simplifying the structure. Can be achieved.
- the absolute value of the amplitude of the signal appearing on the second intersection 712 side of the third line 709 and the second intersection 712 side of the fourth line 710 are displayed.
- the lengths of the first line 707, the second line 708, the third line 709, and the fourth line 710, the first matching circuit 713, and the second matching are set so that the absolute values of the amplitudes of the appearing signals are substantially the same.
- the circuit 714, the third matching circuit 715, and the fourth matching circuit 716, and the first phase shifter 717, the second phase shifter 718, the third phase shifter 719, and the fourth phase shifter 720 may be designed.
- the absolute value of the amplitude of the signal appearing on the first intersection 711 side of the first line 707 and the first intersection of the second line 708 is substantially the same.
- the second matching circuit 714, the third matching circuit 715, and the fourth matching circuit 716, the first phase shifter 717, the second phase shifter 718, the third phase shifter 719, and the fourth phase shifter 720 are designed. Also good. Thereby, the advantageous effect that the isolation between the 1st load circuit 721 and the 2nd load circuit 722 can be made still higher is acquired.
- the phase of the signal appearing on the first intersection 711 side of the first line 707 are such that the difference from the phase of the signal appearing on the first intersection 711 side of the second line 708 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the first line matching circuit 713, the second matching circuit 714, the first phase shifter 717, and the second phase shifter 718 may be designed.
- the phase difference is zero. Therefore, when signals having the same phase and the same absolute value of amplitude are input to the first terminal 702 and the second terminal 703, the phase of the signal appearing on the first intersection 711 side of the first line 707 Since the difference from the phase of the signal appearing on the first intersection 711 side of the second line 708 is approximately 180 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0), at the first intersection 711, the common mode The signal current is canceled out, and the signal in the common mode does not propagate from the first intersection 711 to the first load circuit 721 side.
- the phase difference is ⁇ 180 degrees. Therefore, when signals having a phase difference of ⁇ 180 degrees and an equal absolute value are input to the first terminal 702 and the second terminal 703, they appear on the first intersection 711 side of the first line 707. Since the difference between the phase of the signal and the phase of the signal appearing on the first intersection 711 side of the second line 708 is approximately 0 ⁇ 360 degrees * n (n is an integer of 0 or more), the first intersection 711 The differential mode signal currents are added together, and the differential mode signal propagates from the first intersection 711 to the first load circuit 721 side.
- the first terminal 702 and the second terminal 703 when signals having the same phase and the same amplitude and absolute value are input to the first terminal 702 and the second terminal 703, the signal appearing on the first intersection 711 side of the first line 707
- the difference between the phase and the phase of the signal appearing on the first intersection 711 side of the second line 708 to be approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more)
- the first Only a differential mode signal generated between the terminal 702 and the second terminal 703 can be selected and propagated to the first load circuit 721.
- the phase of the signal appearing on the first intersection 711 side of the first line 707 The signal is input from the first intersection 711 under the condition that the difference from the phase of the signal appearing on the first intersection 711 side of the second line 708 is approximately 180 ⁇ 360 degrees * n (n is an integer of 0 or more).
- n is an integer of 0 or more.
- the case where the phase difference between the phase of the signal appearing on the second intersection 712 side of the third line 709 and the phase of the signal appearing on the second intersection 712 side of the fourth line 710 is approximately 180 degrees.
- the difference between the phase change amount from the first terminal 702 to the second intersection point 712 and the phase change amount from the second terminal 703 to the second intersection point 712 is zero.
- the current of the common mode signal generated between the first terminal 702 and the second terminal 703 is added in phase at the second intersection point 712 and is generally propagated from the second intersection point 712 to the second load circuit 722 side.
- the current of the differential mode signal generated between the first terminal 702 and the second terminal 703 is added in the opposite phase at the second intersection point 712 and is canceled out. It is not generally propagated to the load circuit 722 side.
- the differential mode signal generated between the first terminal 702 and the second terminal 703 is propagated only to the first load circuit 721 side, and between the first terminal 702 and the second terminal 703.
- the generated common mode signal is generally propagated only to the second load circuit 722 side. That is, the antenna device 701 according to the sixth embodiment can separately extract two modes of signals generated between the first terminal 702 and the second terminal 703.
- the second line 709 has a second intersection 712 side.
- the line lengths of the third line 709 and the fourth line 710 so that the absolute value of the amplitude of the appearing signal and the absolute value of the amplitude of the signal appearing on the second intersection 712 side of the fourth line 710 are substantially the same.
- the third matching circuit 715, the fourth matching circuit 716, the third phase shifter 719, and the fourth phase shifter 720 may be designed. Thereby, the current of the differential mode signal appearing at the second intersection point 712 can be canceled more accurately, and the differential mode signal of the common mode signal propagating from the second intersection point 712 to the second load circuit 722 side can be corrected.
- the ratio to can be improved.
- a common mode signal having a low correlation coefficient generated in the antenna element 706 and a differential mode signal can be accurately separated, and a small diversity antenna capable of obtaining two signals having a low correlation coefficient can be realized.
- the amount of phase change from the first terminal 702 to the first intersection 711 is approximately 90 ° ⁇ 360 ° * n (n is an integer of 0 or more), and the phase change from the second terminal 703 to the first intersection 711
- the first phase shifter 719 and the second phase shifter 720 may be designed.
- the amount of phase change from the first terminal 702 to the first intersection 711 is approximately 90 ° ⁇ 360 ° * n (n is Since the phase change amount from the second terminal 703 to the first intersection 711 is approximately ⁇ 90 degrees ⁇ 360 degrees * n (n is an integer greater than or equal to 0), the first intersection 711 The common mode signal is canceled.
- the first intersection 711 is a virtually grounded location. Since the phase change amounts from the first intersection 711 virtually grounded to the first terminal 702 and the second terminal 703 are 90 degrees and ⁇ 90 degrees, respectively, from the first terminal 702 and the second terminal 703. When viewed from the first intersection 711 side, the input impedance is infinite. Therefore, the common mode signal generated between the first terminal 2 and the second terminal 703 does not propagate substantially to the first intersection 711 side, but propagates to the second intersection 712 side.
- the ratio of the common mode signal propagating to the second load circuit 22 to the differential mode signal can be further improved, and the ratio of the differential mode signal propagating to the first load circuit 21 to the common mode signal can be further improved. Can be further improved.
- the first intersection 711 side of the first line 707 is input.
- the line lengths of the first line 707 and the second line 708 are such that the absolute value of the amplitude of the signal appearing on the first line 708 and the absolute value of the amplitude of the signal appearing on the first intersection 711 side of the second line 708 are substantially the same.
- the first matching circuit 713, the second matching circuit 714, the first phase shifter 717, and the second phase shifter 718 may be designed.
- the current of the common mode signal appearing at the first intersection 711 can be canceled more accurately, and the common mode signal of the differential mode signal propagating from the first intersection 711 to the first load circuit 721 side can be obtained.
- the ratio to can be improved.
- a common mode signal having a low correlation coefficient generated in the antenna element 706 and a differential signal can be accurately separated, and a small diversity antenna capable of obtaining two signals having a low correlation coefficient can be realized. .
- the phase change amount from the first terminal 702 to the second intersection point 711 is approximately +90 degrees ⁇ 180 degrees * n (n is an integer of 0 or more), and the phase change amount from the second terminal 703 to the second intersection point 712 is
- the line lengths of the third line 709 and the fourth line 710, the third matching circuit 715, and the fourth matching circuit 716 are set so that the amount is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more).
- the third phase shifter 719 and the fourth phase shifter 720 may be designed.
- the second intersection point 712 is a virtually grounded location. Since the phase change amounts from the second ground point 712 virtually grounded to the first terminal 702 and the second terminal 703 are both 90 degrees, the second point of intersection from the first terminal 702 and the second terminal 703 respectively.
- the input impedance when viewing the 712 side is infinite.
- the differential mode signal generated between the first terminal 702 and the second terminal 703 does not generally propagate to the second intersection 712 side, but generally propagates to the first intersection 711 side.
- the ratio of the differential mode signal propagating to the first load circuit 721 to the advisor mode signal can be further improved, and the ratio of the common mode signal propagating to the second load circuit 722 to the differential mode signal can be improved. Can be further improved.
- the current of the differential mode signal appearing at the second intersection point 712 can be canceled more accurately, and the ratio of the common mode signal propagating from the second intersection point 712 to the second load circuit 722 side with respect to the differential mode signal is increased.
- a common mode signal having a low correlation coefficient generated in the antenna element 706 and a differential signal can be accurately separated, and a small diversity antenna capable of obtaining two signals having a low correlation coefficient can be realized. .
- transmission loss in the first line 707, the second line 708, the third line 709, and the fourth line 710 can be reduced, and the number of necessary components can be reduced, thereby reducing the size and weight. it can.
- a matching circuit may be connected between at least one of the first intersection 711 and the first load circuit 721 and between the second intersection 712 and the second load circuit 722.
- the first matching circuit 713, the second matching circuit 714, the third matching circuit 715, the fourth matching circuit 716, the first phase shifter 717, the second phase shifter 718, the third phase shifter 719, and the fourth phase shifter 720 Is basically designed by a circuit of a reactance element. However, when a signal is input from the first intersection 711, the absolute value of the amplitude of the signal appearing on the second intersection 712 side of the third line 709 and the absolute value of the amplitude of the signal appearing on the second intersection 712 side of the fourth line 710.
- a resistance element and an amplifier circuit for example, the first line 707 has a transmission path and a reception path, and each has a transmission amplifier circuit and a reception amplifier circuit.
- Such a configuration may be designed with a circuit including the above. Accordingly, high isolation characteristics between the first load circuit 721 and the second load circuit 722 can be realized, and transmission / reception characteristics of the electronic device can be improved.
- FIG. 8 is a diagram illustrating a signal transmission method using the signal demultiplexer according to Embodiment 7 of the present invention.
- FIG. 8 is a diagram illustrating a signal transmission method using the signal demultiplexer according to Embodiment 7 of the present invention.
- symbol is described and it demonstrates below centering on a different structure.
- the antenna element 806 includes two pairs of antenna elements: an antenna element composed of a first element 835 and a third element 837 and an antenna element composed of a second element 836 and a fourth element 838. This shows a case where a dipole antenna is used.
- a first terminal 802 is provided at the end of the third element 837, and a second terminal 803 is provided at the end of the fourth element 838.
- the first line 807 and the third line 809 connected to the first terminal 802, the second line 808 and the fourth line 810 connected to the second terminal 803, the first phase shifter 817, the second phase shifter. 818, the third phase shifter 819, the fourth phase shifter 820, and the first load circuit 821 and the second load circuit 822 are generally arranged above the ground plate 834 built in the electronic device (not shown). Has been.
- first line 807 and the first phase shifter 817 are designed so that the amount of phase change from the first terminal 802 to the first intersection 811 becomes +90 degrees, and from the second terminal 803 to the first intersection 811.
- the second line 808 and the second phase shifter 818 are designed so that the phase change amount of ⁇ 90 degrees becomes ⁇ 90 degrees, and the phase change amount from the first terminal 802 to the second intersection 812 becomes +90 degrees.
- the third line 809 and the third phase shifter 819 are designed, and the fourth line 810 and the fourth phase shifter 820 are such that the amount of phase change from the second terminal 803 to the second intersection 812 is +90 degrees. Designed.
- the first element 835 and the second element 836 are disposed substantially parallel to the end of the ground plate 834, and the third element 837 and the fourth element 838 are substantially perpendicular to the end of the ground plate 834. Is arranged.
- FIG. 9 is an operation explanatory diagram of an antenna using the signal demultiplexer according to the seventh embodiment of the present invention.
- FIG. 9 shows a case where a differential mode signal is generated in the antenna element 806.
- the first element 835 and the second element 836 generate currents having the same direction (shown by arrows in FIG. 9), and the third element 837 and the fourth element 838 have currents having opposite directions. Will occur.
- the phase difference between the signals generated at the first terminal 802 and the second terminal 803 is 180 degrees.
- a signal appears at the first intersection 711, but a signal appears at the second intersection 812 according to the principle described in Embodiment 6. It does not appear. That is, when a differential mode signal is generated in the antenna element 806, the first load circuit 821 receives the signal, but the second load circuit 822 does not receive the signal.
- this signal is not propagated to the second load circuit 822, and most of the signal is supplied to the antenna element 806.
- the supplied signal generates a differential mode current in the antenna element 806 (see FIG. 9), and is radiated into the air as an electromagnetic wave.
- the current vector on the antenna element 806 contributing to radiation is mainly the current vector generated in the first element 835 and the second element 836, and the current vector generated in the third element 837 and the fourth element 838 is Since the directions of the current vectors are opposite to each other, they do not greatly contribute to radiation.
- the radiation pattern when the differential mode is generated in the antenna element 806 is a radiation pattern 839 as shown by a dotted line. Therefore, when an electromagnetic wave mainly coming from the vertical direction is received with respect to the first element 835 and the second element 836, a differential mode is generated on the antenna element 806, and only from the first load circuit 821. The signal is taken out.
- FIG. 10 is a diagram illustrating the operating principle of an antenna using a signal demultiplexer according to Embodiment 7 of the present invention.
- FIG. 10 shows a case where a common mode signal is generated in the antenna element 806.
- the first element 835 and the second element 836 generate currents with opposite directions (shown by arrows in FIG. 10), and the third element 837 and the fourth element 838 have currents with the same direction. appear. Therefore, the phase difference between signals generated at the first terminal 802 and the second terminal 803 is substantially 0 degree.
- the current vector on the antenna element 806 that contributes to radiation is mainly a current vector generated on the third element 837 and the third element 838 and a current vector 841 on the ground plate 834 generated in conjunction therewith.
- the directions of the current vectors are opposite to each other, and thus do not greatly contribute to radiation. Therefore, the radiation pattern when the common mode is generated in the antenna element 806 is a radiation pattern 840 as shown by a dotted line in FIG. Therefore, when an electromagnetic wave mainly coming from the vertical direction is received with respect to the third element 837 and the fourth element 838, a common mode is generated on the antenna element 806, and the second load circuit 822 is generated. The signal is taken out only from.
- the antenna element 806 for example, a dipole antenna
- the antenna device can be reduced in size and weight.
- the reason why the antenna element 806 having the symmetrical structure as shown in FIGS. 8 to 10 is intentionally used is that a common mode signal and a differential mode signal are generated between the first terminal 802 and the second terminal 803, respectively. This is because the directions of the current vectors contributing to radiation can be made orthogonal to each other (which can also be understood from the fact that the current vectors contributing to radiation in FIGS. 9 and 10 are orthogonal). Therefore, it is possible to maximize the diversity gain of the directional diversity antenna realized by only one antenna element, which is a feature of the antenna device using the signal distributor of the present invention.
- the antenna element 806 does not have a symmetric structure, it is possible to realize a small directional diversity antenna having two polarization axes (although not orthogonal to each other).
- the ground plate 834 may have a shape that is line-symmetric with respect to an arbitrary line 844 as in the antenna element 806 (see FIG. 8).
- a common mode signal is generated between the first terminal 802 and the second terminal 803, a current vector contributing to radiation is also generated in the ground plate 834. If it is designed to have a symmetric structure, a directional diversity antenna with a high diversity gain can be realized.
- FIG. 11 is a diagram showing an antenna apparatus according to Embodiment 7 of the present invention. 11, in FIG. 11, at the midpoint (not shown) of the first terminal 802 and the second terminal 803 on the first straight line (not shown) connecting the first terminal 802 and the second terminal 803,
- the antenna element 806 has a substantially line-symmetric shape with respect to a line 844 perpendicular to the first straight line. Further, at a midpoint (not shown) between the third terminal 804 and the fourth terminal 805 on the third straight line (not shown) connecting the third terminal 804 and the fourth terminal 805, the perpendicular to the third straight line is provided.
- the antenna element 806 has a substantially line-symmetric shape with respect to the line 844. By adopting such a shape as the antenna element 806, it is possible to maximize the diversity gain of the directional diversity antenna.
- FIG. 12 is a diagram showing another antenna apparatus according to Embodiment 7 of the present invention.
- the antenna element 806 has a substantially line-symmetric shape with respect to the vertical line 844, and the third terminal 804 substantially exists on the line 844.
- the antenna device 801 of the seventh embodiment has high isolation characteristics between the first load circuit 821 and the second load circuit 822, it can be said that it also has a function of a duplexer. .
- the first load circuit 821 as a reception side circuit and the second load circuit 822 as a transmission side circuit.
- the antenna device 801 of the present invention is also used as a duplexer, it is possible to ensure isolation between the first load circuit 821 and the second load circuit 822 even if the transmitted and received signals have the same frequency. It is possible to realize characteristics that could not be realized with this duplexer.
- the first intersection 811 that receives the differential mode signal generated in the antenna element 806 may be connected to the reception side circuit.
- a symmetrical antenna element (dipole antenna) is used.
- the antenna element need not be limited to a symmetrical structure, and an antenna element having an asymmetric structure may be used as long as the antenna element has at least two connection terminals.
- the antenna device 801 according to Embodiment 7 of the present invention is used, even when an asymmetrical antenna element is used, the two modes of the common mode and the differential mode generated in the asymmetrical antenna element are independent of each other. Can be received and transmitted, and equivalently function as two antenna elements. As a result, it is possible to realize an antenna device that is optimal for a small electronic device having a small volume allowed for the antenna element.
- the antenna device of the seventh embodiment may be used for an in-vehicle antenna that receives a television broadcast or a radio broadcast.
- the antenna element 806 of the present embodiment created on the transparent resin film is attached to the windshield, and the antenna device of the seventh embodiment is realized.
- An antenna can be realized.
- the first intersection 811 and the first load circuit 821 for example, a receiver such as a TV tuner or a demodulation circuit
- the second intersection 812 and the second load circuit 822 for example, a TV
- the receiver is connected to a receiver such as a tuner or a demodulation circuit by a coaxial cable of about 5 m.
- the number of signal lines can be reduced from two to one by adopting the transmission method described in the following embodiment 8 or later. This can reduce the weight and improve the production efficiency.
- an amplifier is connected between the third element 837 and the first terminal 802 and between the fourth element 838 and the second terminal 803 in FIG. 8, so that the antenna is connected to the antenna from the first terminal 802 and the second terminal 803. It is possible to reduce NF characteristic deterioration due to loss on the device 801 side.
- freq indicates the frequency
- impedance indicates the impedance.
- FIG. 13 is a diagram showing a case where the antenna element 806 according to the seventh embodiment of the present invention operates in the differential mode.
- FIG. 14 is a diagram showing a case where the antenna element 806 according to Embodiment 7 of the present invention operates in the common mode.
- the antenna element 806 is operating in the differential mode (see FIG. 13)
- the antenna element composed of the first element 835 and the third element 837 and the antenna element composed of the second element 836 and the fourth element 838 are Since they are connected in series, the input impedance of the antenna element 806 viewed from the first terminal 802 and the second terminal 803 is 100 ⁇ .
- the antenna element 806 When the antenna element 806 is operating in the common mode (see FIG. 14), the antenna element composed of the first element 835 and the third element 837 and the antenna element composed of the second element 836 and the fourth element 838 are Since they are connected in parallel, the input impedance of the antenna element 806 viewed from the first terminal 802 and the second terminal 803 is 25 ⁇ .
- the input impedance of the antenna element 806 (port number 3) in FIG. 13 is 100 ⁇
- the input impedance of the antenna element 806 (port number 6) in FIG. 14 is 25 ⁇ . Yes.
- the high frequency circuit is designed with 50 ⁇
- the first load circuit 821 (port number 1) and the second load circuit 822 (port number 2) in FIG. 13 and the first load circuit 821 in FIG. (Port number 4) and the second load circuit 822 (port number 5) were designed with their input impedance set to 50 ⁇ . 13 and 14, the first phase shifter 817, the second phase shifter 818, the third phase shifter 819, and the fourth phase shifter 820 are each realized by 803 reactance elements.
- FIG. 15 is a diagram showing pass characteristics of the antenna device according to Embodiment 7 of the present invention. 15, the antenna element 806 (port number 3), the first load circuit 821 (port number 1), and the second load circuit 822 (port number 2) when the antenna element 806 shown in FIG. 13 operates in the differential mode.
- the pass characteristic between is shown.
- S (3, 1) indicates a passing characteristic from the first load circuit 821 (port number 1) to the antenna element 806 (port number 3).
- the pass characteristic S (3, 1) from the first load circuit 821 (port number 1) to the antenna element 806 (port number 3) is approximately 0 dB at 620 MHz, and is in a conductive state.
- the pass characteristic S (3, 2) from the second load circuit 822 (port number 2) to the antenna element 806 (port number 3) is ⁇ 30 dB or less at 620 MHz, and high isolation is obtained.
- the passing characteristic S (2, 1) from the first load circuit 821 (port number 1) to the second load circuit 822 (port number 2) is ⁇ 30 dB or less at 620 MHz, and high isolation is obtained. I understand that.
- FIG. 16 is a diagram showing pass characteristics of another antenna device according to Embodiment 7 of the present invention. 16, the antenna element 806 (port number 6), the first load circuit 821 (port number 4), and the second load circuit 822 (port number 5) when the antenna element 806 shown in FIG. 14 operates in the common mode.
- the pass characteristic between is shown.
- S (6, 4) indicates a passing characteristic from the first load circuit 821 (port number 4) to the antenna element 806 (port number 6).
- the pass characteristic S (6, 5) from the second load circuit 822 (port number 5) to the antenna element 806 (port number 6) is approximately 0 dB at 620 MHz, which is a conductive state.
- the pass characteristic S (6, 4) from the first load circuit 821 (port number 4) to the antenna element 806 (port number 6) is ⁇ 30 dB or less at 620 MHz, and high isolation is obtained.
- the passing characteristic S (5, 4) from the first load circuit 821 (port number 4) to the second load circuit 822 (port number 5) is ⁇ 30 dB or less at 620 MHz, and high isolation is obtained. I understand that.
- FIGS. 17 to 22 show impedance characteristics at ports 1 to 6. 17 to 22, for example, S (1,1) indicates the input impedance characteristic when the first intersection 811 side is viewed from the first load circuit 821 in FIG. 13.
- the antenna element 806 and the signal demultiplexer in FIG. 8 are connected to the first intersection while the characteristic impedances of the first line, the second line, the third line, and the fourth line are all Zo.
- the input impedance of the antenna element 806 viewed from the second terminal may be designed to be approximately Zo / 2. This is because the antenna device shown in FIG. 8 is represented by the equivalent circuit shown in FIG. 13 and FIG.
- FIGS. 14 and 15 satisfy the above-described impedance relationship, and as a result, good electrical characteristics can be realized as shown in FIGS.
- first load circuit and the second load circuit in the above-described fourth to seventh embodiments actually represent communication circuits that receive and transmit signals, and are mounted inside electronic devices. It is mounted on a mounting board.
- the first terminal and the first intersection are composed of a first line that is one line, one first matching circuit, and one first phase shifter. ing. However, it may be composed of a plurality of lines, a plurality of matching circuits, and a plurality of phase circuits. The same applies to the second terminal and the first intersection, the third terminal and the second intersection, and the fourth terminal and the second intersection.
- the “first line”, “second line”, “third line”, and “fourth line” include those composed of a plurality of lines.
- the “first matching circuit”, “second matching circuit”, “third matching circuit”, and “fourth matching circuit” include those configured by a plurality of matching circuits.
- the “one phase shifter”, “second phase shifter”, “third phase shifter”, and “fourth phase shifter” include those composed of a plurality of phase shifters.
- FIG. 23 is a block diagram when the antenna device according to Embodiments 4 to 6 of the present invention is used in an electronic apparatus.
- FIG. 23 is a block diagram when the antenna device according to Embodiments 4 to 6 of the present invention is used in an electronic apparatus.
- symbol is described and it demonstrates below centering on a different structure.
- an antenna element 906 having a first terminal 902 and a second terminal 903 is connected to the first amplifier 942 through the first terminal 2, and is connected to the 902 amplifier 943 through the second terminal 903. It is connected.
- the first amplifier 942 is connected to the two-terminal pair line 927 at the ninth terminal 928
- the second amplifier 943 is connected to the two-terminal pair line 927 at the tenth terminal 929.
- the first matching circuit 913 and the third matching circuit 915 of the first signal demultiplexer 930 are connected to the first terminal 902 of the two-terminal pair line 927, and the second of the first signal demultiplexer 930 is connected.
- the matching circuit 914 and the fourth matching circuit 916 are connected to the second terminal 903 of the two-terminal pair line 927.
- first phase shifter 917 is connected between the first matching circuit 913 and the first intersection 911
- second phase shifter 918 is connected between the second matching circuit 914 and the first intersection 911
- third phase shifter 919 is connected between the third matching circuit 915 and the second intersection 912
- fourth phase shifter 920 is connected between the fourth matching circuit 916 and the second intersection 912.
- the line lengths of the first line 907, the second line 908, the third line 909, and the fourth line 910 of the first signal duplexer 930 of FIG. 23, the first matching circuit 913, and the second matching circuit 914 are shown.
- the third matching circuit 915 and the fourth matching circuit 916, and the first phase shifter 917, the second phase shifter 918, the third phase shifter 919, and the fourth phase shifter 920 are designed.
- the signal 1 propagates through the two-terminal pair line 927 in the differential mode, and the signal 2 is a two-terminal pair. It propagates along the line 927 in the common mode. That is, the signal 1 and the signal 2 are mixed and propagated in the two-terminal pair line 927.
- These mixed signals can be separated with high accuracy by the first signal demultiplexer 930.
- only the signal 1 propagated in the differential mode is received by the first load circuit 921, and only the signal 2 propagated in the common mode is received by the second load circuit 922. Received at. That is, by using the antenna device of the present invention, two types of signals can be transmitted and received using one antenna element 906.
- the antenna device according to the eighth embodiment is different from the fifth terminal 923 and the sixth terminal 924 of the two-terminal pair line 927 or the seventh terminal 925 and the eighth terminal 926 in the differential mode and the common mode.
- the first signal and the second signal may be input / output, received by the first signal demultiplexer 930, and transmitted by the antenna element 906.
- data can be transmitted and received between the load circuits at high speed.
- the fifth terminal 923, the sixth terminal 924, the seventh terminal 925, and the eighth terminal 926 are deleted, and the first terminal 902 and the second terminal 903 are connected to one end of the two-terminal pair line 927,
- the ninth terminal 928 and the tenth terminal 929 may be connected to the other end.
- the structure of the two-terminal pair line 927 can be simplified.
- the two-terminal pair line 927 may have a shape that is plane-symmetric with respect to an arbitrary plane. By adopting such a shape, for example, it is possible to prevent a common mode signal from being converted to the differential mode while propagating through the two-terminal pair line 927.
- the outside of the two-terminal pair line 927 may be shielded.
- S / N Signal / Noise
- a modulation method with a large transmission amount for example, 64QAM or 16QAM
- the modulation method has a relatively small transmission amount and does not require high reception sensitivity (for example, QPSK or BPSK). Or the like may be used in accordance with the transmission mode.
- the antenna device of the eighth embodiment it is possible to grasp the amount of noise received by the two-terminal pair circuit 927 in the second load circuit 922 that receives the common mode. This is because noise coming from the outside and leaking into the two-terminal pair circuit 927 propagates mainly on the two-terminal pair line 927 in the common mode.
- the frequency of the signal 1 and the signal 2 may be the same or different. This is because the first load circuit 921 and the second load circuit 922 can be input / output independently of each other.
- the first amplifier 942 and the second amplifier 943 can be operated as a low noise amplifier.
- the NF characteristic degradation of the receiving system due to the loss of the subsequent circuit of the first amplifier 942 and the second amplifier 943 is reduced. be able to.
- the two-terminal pair line 927 also operates as a part of the antenna. Can be increased equivalently, and the radiation resistance of the antenna device can be increased.
- the length of the two-terminal pair line 27 is increased to about 5 m. It will be. This effect becomes more prominent when the first amplifier 42 and the second amplifier 43 are not provided.
- FIG. 24 is a diagram showing another antenna apparatus according to Embodiment 8 of the present invention.
- the second signal branching filter 931 is connected to the ninth terminal 928 and the tenth terminal 929 in FIG. 24 connects the first intersection 911 of the second signal demultiplexer 931 and, for example, at least one first intersection 911 of the antenna apparatus of FIGS.
- the second intersection 912 of the waver 931 is connected to at least one second intersection 912 of the antenna device of FIGS. 5 to 7 for use.
- a differential mode signal obtained from the two-terminal pair line 927 and the antenna element 906 is taken out at the first intersection point 911, and obtained from the two-terminal pair line 927 and the antenna element 906 at the second intersection point 912.
- FIG. 25 is a block diagram of a signal transmission method used in a general mobile phone.
- a general signal transmission method 5100 includes a first high-frequency circuit 5101 and a second high-frequency circuit 5102.
- the first high-frequency circuit 5101 and the second high-frequency circuit 5102 include the first transmission line 5103 and the second high-frequency circuit 5102.
- the transmission line 5104 and the two-terminal pair line 5105 are electrically connected.
- the signal output to the first transmission line 5103 and the signal input from the second transmission line 5104 are generally substantially the same.
- the state of transmission of such a signal is referred to as a differential mode.
- the arrows in FIG. 25 exemplify the current direction of the signal.
- the two-terminal pair line 5105 a feeder line, a coaxial line or the like is used as the two-terminal pair line 5105.
- the two-terminal pair line 5105, the first high-frequency circuit 5101, and the second high-frequency circuit 5102 may receive noise from an external device.
- a common mode filter may be connected in the middle of the two-terminal pair line 5105 to remove noise.
- the signal transmission system according to the ninth embodiment of the present invention provides a signal transmission system that can transmit two signals of the same frequency at the same time.
- the signal transmission method according to the ninth embodiment of the present invention is configured to transmit the first signal in the differential mode and transmit the second signal in the common mode using a two-terminal pair line.
- the first signal is transmitted in the differential mode and the second signal is transmitted in the common mode using a two-terminal pair line. For this reason, for example, it is possible to provide a signal transmission method capable of transmitting the first signal and the second signal, which are two signals of the same frequency, through one two-terminal pair line at the same time. It becomes.
- FIG. 26 is a block diagram of a signal transmission method according to the ninth embodiment of the present invention.
- the signal transmission method 201 of the ninth embodiment includes a two-terminal pair line 206 having at least four terminals of a first terminal 202, a second terminal 203, a third terminal 204, and a fourth terminal 205,
- the first line 207 one of which is connected to the first terminal 202 of the two-terminal pair line 206
- the second line 208 one of which is connected to the second terminal 203 of the two-terminal pair line 206
- the third line 209, one of which is connected to the third terminal 204, and the fourth line 210, one of which is connected to the fourth terminal 205 of the two-terminal pair line 206, are connected to the other of the first line 207 and the second line 207.
- the other of the line 208 is connected at the first intersection 211, and the other of the third line 209 and the other of the fourth line 210 are connected at the second
- the signal transmission method 201 includes a first matching circuit 213 and a first phase shifter 217 connected in the middle of the first line 7, and a second matching connected in the middle of the second line 208.
- a first load circuit 221 is connected between the first intersection 211 and the ground, and a second load circuit 222 is connected between the second intersection 212 and the ground.
- the two-terminal pair line 206 has a sixth terminal 223, a seventh terminal 224, an eighth terminal 225, and a ninth terminal 226.
- the phase difference between the phase of the signal appearing on the second intersection 212 side of the third line 209 and the phase of the signal appearing on the second intersection 212 side of the fourth line 210. Is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the phase difference between the phase of the signal appearing on the first intersection 211 side of the first line 207 and the phase of the signal appearing on the first intersection 211 side of the second line 208 is also It is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the lengths of the first line 207, the second line 208, the third line 209, and the fourth line 210, the first matching circuit 213, the second matching circuit 214, and the third matching circuit 215 are set so as to satisfy the above conditions.
- the fourth matching circuit 216, the first phase shifter 217, the second phase shifter 218, the third phase shifter 219, and the fourth phase shifter 220 are designed to have appropriate values. From this, for example, the signal transmitted from the first load circuit 221 includes the phase of the signal appearing on the second intersection 212 side of the third line 209 and the phase of the signal appearing on the second intersection 212 side of the fourth line 210. Is approximately 180 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0), and therefore, it does not substantially propagate from the second intersection 212 to the second load circuit 222 side.
- phase difference is approximately 180 ° ⁇ 360 ° * n (n is an integer equal to or greater than 0), the phase difference does not substantially propagate from the first intersection 211 to the first load circuit 221 side.
- the first load circuit 221 and the second load circuit 222 can exchange signals with the two-terminal pair line 206 independently of each other. That is, the first load circuit 221 and the second load circuit 222 do not need to be restricted in terms of time and frequency, and can exchange signals independently of each other.
- the first matching circuit 213, the second matching circuit 214, the first phase shifter 217, and the second phase shifter 218 are designed.
- the phase difference is zero.
- the phase of the signal appearing on the first intersection 211 side of the first line 207 Since the difference from the phase of the signal appearing on the first intersection 211 side of the second line 208 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more), the common mode at the first intersection 211 is The signal current is canceled out, and the signal in the common mode does not propagate from the first intersection 211 to the first load circuit side.
- the first intersection 211 Since the difference between the phase of the signal and the phase of the signal appearing on the first intersection 211 side of the second line 208 is approximately 0 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0), the first intersection 211 The currents of the differential mode signals are added together, and the signal substantially propagates from the first intersection 211 to the first load circuit side.
- the phase of the signal appearing on the first intersection 211 side of the first line 207 when a signal having the same phase and the same amplitude is input to the first terminal 202 and the second terminal 203, the phase of the signal appearing on the first intersection 211 side of the first line 207, By designing the signal demultiplexer 201 so that the difference from the phase of the signal appearing on the first intersection 211 side of the second line 208 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more). Only the differential mode signal generated between the first terminal 202 and the second terminal 203 can be selected and propagated to the first load circuit 221.
- the phase of the signal appearing on the first intersection 211 side of the first line 207 The signal is input from the first intersection 211 under the condition that the difference from the phase of the signal appearing on the first intersection 211 side of the second line 208 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- n is an integer of 0 or more.
- the case where the phase difference between the phase of the signal appearing on the second intersection 212 side of the third line 209 and the phase of the signal appearing on the second intersection 212 side of the fourth line 210 is approximately 180 degrees.
- the difference between the phase change amount from the first terminal 202 to the second intersection 212 and the phase change amount from the second terminal 203 to the second intersection 212 is substantially zero.
- the current of the common mode signal generated between the first terminal 202 and the second terminal 203 is added in phase at the second intersection 212 and substantially from the second intersection 212 to the second load circuit 222 side. Propagated.
- the current of the differential mode signal generated between the first terminal 202 and the second terminal 203 is added and reversed in the opposite phase at the second intersection 212, and the second load circuit 222 starts from the second intersection 212. It is not propagated to the side.
- the differential mode signal generated between the first terminal 202 and the second terminal 203 is substantially propagated only to the first load circuit 221 side, and between the first terminal 202 and the second terminal 203.
- the common mode signal generated therebetween is substantially propagated only to the second load circuit 222 side. That is, the signal transmission method 201 according to the ninth embodiment can separately extract two modes of signals generated between the first terminal 202 and the second terminal 203.
- the first signal transmitted in the differential mode and the second signal having the same frequency as the first signal transmitted in the common mode are transmitted via the two-terminal pair line 206,
- the first signal is extracted to the first load circuit 221 via the first intersection 211 and the second signal is extracted to the second load circuit 222 via the second intersection 212 without substantially interfering with each other.
- the first signal and the second signal can be transmitted via the two-terminal pair line 206.
- the first matching circuit 213, the second matching circuit 214, the first phase shifter 217, and the second phase shifter 218 may be designed.
- the current of the common mode signal appearing at the first intersection 211 can be canceled more accurately, and the common mode signal of the differential mode signal propagating from the first intersection 211 to the first load circuit 221 side.
- the ratio to can be improved.
- the third line 209 has a second intersection 212 side.
- the line lengths of the third line 209 and the fourth line 210 so that the absolute value of the amplitude of the appearing signal and the absolute value of the amplitude of the signal appearing on the second intersection 212 side of the fourth line 210 are substantially the same.
- the third matching circuit 215, the fourth matching circuit 216, the third phase shifter 219, and the fourth phase shifter 220 may be designed.
- the current of the differential mode signal appearing at the second intersection 212 can be more accurately canceled, and the ratio of the common mode signal propagating from the second intersection 212 to the second load circuit 222 side with respect to the differential mode signal is increased. Can be improved.
- the absolute value of the amplitude of the signal appearing on the second intersection 212 side of the third line 209 and the absolute value of the amplitude of the signal appearing on the second intersection 212 side of the fourth line 210 are also shown.
- the line lengths of the first line 207, the second line 208, the third line 209, and the fourth line 210, the first matching circuit 213, the second matching circuit 214, and the third matching so that the values are substantially the same.
- the circuit 215, the fourth matching circuit 216, the first phase shifter 217, the second phase shifter 218, the third phase shifter 219, and the fourth phase shifter 220 may be designed.
- the absolute value of the amplitude of the signal appearing on the first intersection 211 side of the first line 207 and the signal appearing on the first intersection 211 side of the second line 208 are similar.
- the third matching circuit 215 and the fourth matching circuit 216, and the first phase shifter 217, the second phase shifter 218, the third phase shifter 219, and the fourth phase shifter 220 may be designed. Thereby, an advantageous effect that the isolation between the first load circuit 221 and the second load circuit 222 can be further increased is obtained.
- the amount of phase change from the first terminal 202 to the first intersection 211 is approximately 90 ° ⁇ 360 ° * n (n is an integer of 0 or more), and the phase change from the second terminal 203 to the first intersection 211
- the first phase shifter 217 and the second phase shifter 218 may be designed.
- the amount of phase change from the first terminal 202 to the first intersection 211 is approximately 90 ° ⁇ 360 ° * n (n is Since the phase change amount from the second terminal 3 to the first intersection 211 is approximately ⁇ 90 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0), the first intersection 211 The common mode signal is canceled.
- the first intersection 211 is a virtually grounded location.
- the amount of phase change from the first intersection 211 that is virtually grounded to the first terminal 202 and the second terminal 203 is 90 degrees and ⁇ 90 degrees, respectively, and therefore from the first terminal 202 and the second terminal 203.
- the input impedance when viewing the first intersection 211 side is infinite. Therefore, the common mode signal generated between the first terminal 202 and the second terminal 203 does not generally propagate to the first intersection 211 side but propagates to the second intersection 212 side. .
- the ratio of the common mode signal propagating to the second load circuit 222 to the differential mode signal can be further improved, and the ratio of the differential mode signal propagating to the first load circuit 221 to the common mode signal can be improved. Can be further improved.
- the first intersection 211 side of the first line 207 The line lengths of the first line 207 and the second line 208 are such that the absolute value of the amplitude of the signal appearing on the first line 207 and the absolute value of the amplitude of the signal appearing on the first intersection 211 side of the second line 208 are substantially the same.
- the first matching circuit 213, the second matching circuit 214, the first phase shifter 217, and the second phase shifter 218 may be designed. As a result, the current of the common mode signal appearing at the first intersection 211 can be canceled more accurately, and the ratio of the differential mode signal propagating from the first intersection 211 to the first load circuit 221 side with respect to the common mode signal. Can be improved.
- the amount of phase change from the first terminal 202 to the second intersection 211 is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more), and the phase change from the second terminal 203 to the second intersection 212
- the lengths of the third line 209 and the fourth line 210, the third matching circuit 215, and the fourth matching circuit 216 are set so that the amount is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more).
- the third phase shifter 217 and the fourth phase shifter 218 may be designed.
- the second intersection 212 is a virtually grounded location. Since the phase change amounts from the virtually intersected second intersection 212 to the first terminal 202 and the second terminal 203 are both 90 degrees, the second intersection from the first terminal 202 and the second terminal 203, respectively.
- the input impedance when viewing the 212 side is infinite. Therefore, the differential mode signal generated between the first terminal 202 and the second terminal 203 does not generally propagate to the second intersection 212 side, but generally propagates to the first intersection 211 side. .
- the ratio of the differential mode signal propagating to the first load circuit 222 to the common mode signal can be further improved, and the ratio of the common mode signal propagating to the second load circuit 222 to the differential mode signal can be further improved. Can be further improved.
- the current of the differential mode signal appearing at the second intersection 212 can be canceled more accurately, and the ratio of the signal of the common mode that propagates from the second intersection 212 to the second load circuit 222 side with respect to the differential mode. Can be improved.
- the amount of phase change from the third terminal 204 to the second intersection 211 is approximately + 90 ° ⁇ 180 ° * n (n is an integer equal to or greater than 0), and the phase change from the fourth terminal 205 to the second intersection 212
- the lengths of the third line 209 and the fourth line 210, the third matching circuit 215, and the fourth matching circuit 216 are set so that the amount is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more).
- the third phase shifter 217 and the fourth phase shifter 218 may be designed.
- the differential mode signal is generated between the third terminal 204 and the fourth terminal 205, the amount of phase change from the third terminal 204 to the second intersection 211, and the second terminal 205 to the second terminal Since the phase change amount up to the intersection point 212 is the same amount, the differential mode signal is canceled at the second intersection point 212.
- the second intersection 212 is a virtually grounded location. Since the amount of phase change from the virtually grounded second intersection 212 to the third terminal 204 and the fourth terminal 205 is both 90 degrees, the second intersection from the third terminal 204 and the fourth terminal 205, respectively.
- the input impedance when viewing the 212 side is infinite. Therefore, the differential mode signal generated between the third terminal 204 and the fourth terminal 205 does not generally propagate to the second intersection 212 side, but generally propagates to the first intersection 211 side.
- the ratio of the differential mode signal propagating to the first load circuit 222 to the common mode signal can be further improved, and the ratio of the common mode signal propagating to the second load circuit 222 to the differential mode signal can be further improved. Can be further improved.
- the first matching circuit 213, second matching circuit 214, third matching circuit 215, fourth matching circuit 216, first phase shifter 217, second phase shifter 218, third phase shifter 219, fourth A configuration in which at least one of the phase shifters 220 is eliminated may be employed.
- transmission loss in the first line 207, the second line 208, the third line 209, and the fourth line 210 can be reduced, and the number of necessary components can be reduced, thereby reducing the size and weight. it can.
- a matching circuit may be connected between at least one of the first intersection 211 and the first load circuit 221 and between the second intersection 212 and the second load circuit 222.
- the first matching circuit 213, the second matching circuit 214, the third matching circuit 215, the fourth matching circuit 216, the first phase shifter 217, the second phase shifter 218, the third phase shifter 219, the fourth phase shifter 220, and the like. Is basically designed by a circuit of a reactance element. However, in a circuit including a resistance element, an amplifier circuit (for example, a configuration in which the first line 207 has a transmission path and a reception path, each having a transmission amplifier circuit and a reception amplifier circuit, etc.) May be designed. Thereby, while being able to implement
- signals are input / output from the sixth terminal 223, the seventh terminal 224, the eighth terminal 225, and the ninth terminal 226.
- the number of input / output terminals is not limited to this, and it is sufficient that signals are input / output from at least one input / output terminal.
- FIG. 27 is a block diagram of a signal transmission scheme according to Embodiment 10 of the present invention.
- Embodiment 10 of the present invention.
- code symbol is described and it demonstrates below centering on a different structure.
- the signal transmission method 301 of the tenth embodiment includes a two-terminal pair line 306 having at least four terminals of a first terminal 302, a second terminal 303, a third terminal 304, and a fourth terminal 305, and a third
- the fifth terminal 336 is provided on the short-circuit line 327 that connects the terminal 304 and the fourth terminal 305, the phase change amount from the first terminal 302 to the fifth terminal 336, and the second terminal 303 to the fifth terminal 336.
- the phase change amounts of are substantially the same.
- the first line 307 one of which is connected to the first terminal 302 of the two-terminal pair line 306, and the second terminal 303 of the two-terminal pair line 306 are connected.
- the phase of the signal appearing on the first intersection 311 side of the first line 307 and the phase of the signal appearing on the first intersection 311 side of the second line 308 are compared.
- the line lengths of the first line 307, the second line 308, and the third line 309, the first matching circuit 313, the first line 309, and the like so that the phase difference is approximately 180 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0).
- the second matching circuit 314 and the third matching circuit 315, and the first phase shifter 317, the second phase shifter 318, and the third phase shifter 319 are designed.
- the signal transmitted from the first load circuit 321 to the second load circuit 322 side is canceled at the other side of the third line 309 and the third terminal, so that the signal to the second load circuit 322 side is approximately. Do not propagate.
- the signal transmitted from the second load circuit 322 to the first load circuit 321 side also includes the phase of the signal appearing on the first intersection 311 side of the first line 307 and the first intersection 311 side of the second line 308. Since the phase difference from the phase of the signal appearing at is approximately 180 ° ⁇ 360 ° * n (n is an integer equal to or greater than 0), the signal hardly propagates from the first intersection 311 to the first load circuit 321 side.
- the signal does not propagate between the first load circuit 321 and the second load circuit 322, and isolation can be ensured between the first load circuit 321 and the second load circuit 322. Accordingly, the first load circuit 321 and the second load circuit 322 can exchange signals with the two-terminal pair line 306 independently of each other. That is, the first load circuit 321 and the second load circuit 322 do not need to be restricted in terms of time and frequency, and can exchange signals independently of each other.
- the signal transmission method 301 according to the tenth embodiment reduces the number of lines, matching circuits, and the number of phase shifters connecting the third terminal 304 and the second load circuit 322 as compared with the ninth embodiment. Therefore, the size and weight can be reduced.
- the absolute value of the amplitude of the signal appearing on the first intersection 311 side of the first line 307 and the amplitude of the signal appearing on the first intersection 311 side of the second line 308 are shown.
- the phase of the signal appearing on the first intersection 311 side of the first line 307 is such that the difference from the phase of the signal appearing on the first intersection 311 side of the second line 308 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the line length, the first matching circuit 313, the second matching circuit 314, the first phase shifter 317, and the second phase shifter 318 are designed.
- the phase difference is zero.
- the phase of the signal appearing on the first intersection 311 side of the first line 307 Since the difference from the phase of the signal appearing on the first intersection 311 side of the second line 308 is approximately 180 ° ⁇ 360 ° * n (n is an integer equal to or greater than 0), The signal current is canceled out, and the signal in the common mode does not propagate from the first intersection 311 to the first load circuit side.
- n is an integer equal to or greater than 0
- the first terminal 302 and the second terminal 303 when signals having the same phase and the same absolute value of amplitude are input to the first terminal 302 and the second terminal 303, the signal appearing on the first intersection 311 side of the first line 307.
- the difference between the phase and the phase of the signal appearing on the first intersection 311 side of the second line 308 to be approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more)
- the first Only a differential mode signal generated between the terminal 302 and the second terminal 303 can be selected and propagated to the first load circuit 321.
- the phase of the signal appearing on the first intersection 311 side of the first line 307 The signal is input from the first intersection 311 under the condition that the difference from the phase of the signal appearing on the first intersection 311 side of the second line 308 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- n is an integer of 0 or more.
- the case where the phase difference between the phase of the signal appearing on the second intersection 312 side of the third line 309 and the phase of the signal appearing on the second intersection 312 side of the fourth line 310 is approximately 180 degrees.
- the difference between the phase change amount from the first terminal 302 to the second intersection point 312 and the phase change amount from the second terminal 303 to the second intersection point 312 is substantially zero.
- the current of the common mode signal generated between the first terminal 302 and the second terminal 303 is added in phase at the third terminal 304, and is generally propagated to the second load circuit 322 side.
- the current of the differential mode signal generated between the first terminal 302 and the second terminal 303 is added in the opposite phase at the third terminal 304 to be canceled out, and is generally propagated to the second load circuit 322 side. Absent.
- the differential mode signal generated between the first terminal 302 and the second terminal 303 is substantially propagated only to the first load circuit 321 side, and the first terminal 302 and the second terminal 303 The common mode signal generated therebetween is substantially propagated only to the second load circuit 322 side. That is, the signal transmission method 301 according to the tenth embodiment can separately extract two modes of signals generated between the first terminal 302 and the second terminal 303.
- the first signal transmitted in the differential mode and the second signal having the same frequency as the first signal transmitted in the common mode are transmitted via the two-terminal pair line 306,
- the first signal is extracted to the first load circuit 321 via the first intersection 311 and the second signal is extracted to the second load circuit 322 via the third terminal 304 without substantially interfering with each other.
- first signal from the first load circuit 321 is input to the first intersection 311 and the second signal from the second load circuit 322 is input to the third terminal 304 without substantially interfering with each other.
- the first signal and the second signal can be transmitted via the two-terminal pair line 6.
- the amount of phase change from the first terminal 302 to the first intersection 311 is approximately 90 ° ⁇ 360 ° * n (n is an integer of 0 or more), and the phase change from the second terminal 303 to the first intersection 311.
- the first phase shifter 317 and the second phase shifter 318 may be designed.
- the amount of phase change from the first terminal 302 to the first intersection 311 is approximately 90 ° ⁇ 360 ° * n (n is Since the phase change amount from the second terminal 303 to the first intersection 311 is approximately ⁇ 90 degrees ⁇ 360 degrees * n (n is an integer greater than or equal to 0), the first intersection 311 The common mode signal is canceled. That is, for the common mode signal, the first intersection 311 is a virtually grounded location.
- the phase change amounts from the first intersection 311 virtually grounded to the first terminal 302 and the second terminal 303 are 90 degrees and ⁇ 90 degrees, respectively, from the first terminal 302 and the second terminal 303
- the input impedance is infinite. Therefore, the common mode signal generated between the first terminal 302 and the second terminal 303 does not generally propagate to the first intersection 311 side but propagates to the second intersection 312 side.
- the ratio of the common mode signal propagating to the second load circuit 322 to the differential mode signal can be further improved, and the ratio of the differential mode signal propagating to the first load circuit 321 to the common mode signal can be improved. Can be further improved.
- the first intersection 311 side of the first line 307 is obtained.
- the line lengths of the first line 307 and the second line 308 are set so that the absolute value of the amplitude of the signal appearing on the first line 308 and the absolute value of the amplitude of the signal appearing on the first intersection 311 side of the second line 308 are substantially the same.
- the first matching circuit 313, the second matching circuit 314, the first phase shifter 317, and the second phase shifter 318 may be designed. As a result, the current of the common mode signal appearing at the first intersection 311 can be canceled more accurately, and the common mode signal of the differential mode signal propagating from the first intersection 311 to the first load circuit 321 side. The ratio to can be improved.
- At least one of the first matching circuit 313, the second matching circuit 314, the first phase shifter 317, and the second phase shifter 318 may be eliminated.
- transmission loss in the first line 307 and the second line 308 can be reduced, and the number of necessary components can be reduced, thereby reducing the size and weight.
- a matching circuit may be connected between at least one of the first intersection 311 and the first load circuit 321 and between the third terminal 304 and the second load circuit 322.
- the first matching circuit 313, the second matching circuit 314, the first phase shifter 317, and the second phase shifter 318 are basically designed as a reactance element circuit. However, when a signal is input from the other side of the third line 309, the absolute value of the amplitude of the signal appearing on the first intersection 311 side of the first line 307 and the amplitude of the signal appearing on the first intersection 311 side of the second line 308.
- a resistance element and an amplifier circuit for example, the first line 307 has a transmission path and a reception path, respectively, and a transmission amplifier circuit and a reception amplifier circuit are respectively provided.
- the circuit may be designed with a circuit including a configuration such as Thereby, while being able to implement
- signals are input / output from the sixth terminal 323, the seventh terminal 324, the eighth terminal 325, and the ninth terminal 326, but the number of input / output terminals is not limited to this. It is sufficient that a signal is input / output from at least one input / output terminal.
- the first terminal 302, the third terminal 304, the second terminal 303, and the fourth terminal 305 are configured at different positions, but the first terminal 302 and the third terminal 304 are provided. Even if the second terminal 303 and the fourth terminal 305 are configured at the same position, the same effect as described above can be obtained and the number of terminals on the two-terminal pair line 306 can be reduced. Thus, the structure of the two-terminal pair line 306 can be simplified.
- the first terminal 302 and the second terminal 303 When signals having the same phase and the same amplitude are input to the first terminal 302 and the second terminal 303, the absolute value of the amplitude of the signal appearing on the first intersection 311 side of the first line 307, When the absolute values of the amplitudes of the signals appearing on the first intersection 311 side of the two lines 308 are substantially the same, the first terminal 302 and the third terminal 304, and the second terminal 303 and the fourth terminal 305 are configured at the same position.
- FIG. 28 is a block diagram of a signal transmission scheme according to Embodiment 11 of the present invention.
- Embodiment 9 Only the same code
- the signal transmission method 401 includes a first signal demultiplexer 430 connected to a first terminal 402 and a second terminal 403, a tenth terminal 428, and an eleventh terminal 429. And a second signal demultiplexer 431 connected thereto.
- the first signal demultiplexer 430 has one first line 407 connected to the first terminal 402, one third line 409 connected one to the first terminal 402, and one connected to the second terminal 403.
- the second line 408 and the fourth line 410 one of which is connected to the second terminal 403, the other of the first line 407 and the other of the second line 408 are connected to the first intersection 411,
- the other of the three lines 409 and the other of the fourth line 410 are connected to the second intersection 412.
- the second signal demultiplexer 431 includes a first line 407, one connected to the tenth terminal 428, a third line 409, one connected to the first terminal 402, and one to the eleventh terminal 429.
- the second line 408 to be connected and the fourth line 410 to which one is connected to the second terminal 403 are provided.
- the other of the first line 407 and the other of the second line 408 are connected to the first intersection 411.
- the other of the third line 409 and the other of the fourth line 410 are connected to the second intersection 412.
- the operation principle of the first signal demultiplexer 430 will be described in detail below (the operation principle of the second signal demultiplexer 431 is also the same as that of the first signal demultiplexer 430).
- the phase of the signal appearing on the second intersection 412 side of the third line 409 and the signal appearing on the second intersection 412 side of the fourth line 410 are Line lengths of the first line 407, the second line 408, the third line 409, and the fourth line 410 so that the phase difference from the phase is approximately 180 ⁇ 360 degrees * n (n is an integer of 0 or more).
- the device 420 is designed.
- the signal transmitted from the first load circuit 421 includes the phase of the signal appearing on the second intersection 412 side of the third line 409 and the phase of the signal appearing on the second intersection 412 side of the fourth line 410. Is approximately 180 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0), and therefore, the phase difference does not substantially propagate from the second intersection 412 to the second load circuit 422 side.
- phase of the signal appearing on the first intersection 411 side of the first line 407 and the phase of the signal appearing on the first intersection 411 side of the second line 408 are also shown. Since the phase difference is also substantially 180 degrees ⁇ 360 degrees * n (n is an integer of 0 or more), the phase difference does not substantially propagate from the first intersection 411 to the first load circuit 421 side. Therefore, no signal is propagated between the first load circuit 421 and the second load circuit 422, and isolation can be ensured between the first load circuit 421 and the second load circuit 422.
- the first load circuit 421 and the second load circuit 422 can exchange signals with the two-terminal pair line 406 independently of each other.
- the first load circuit 421 and the second load circuit 422 do not need to be restricted in terms of time and frequency, and can exchange signals independently of each other.
- first signal demultiplexer 430 (same as the second signal demultiplexer 431) of the eleventh embodiment can be connected to the two-terminal pair line 406 with only two connection terminals. It becomes possible to simplify the structure.
- the absolute value of the amplitude of the signal appearing on the second intersection 412 side of the third line 409 and the absolute value of the amplitude of the signal appearing on the second intersection 412 side of the fourth line 410 are shown.
- the circuit 415, the fourth matching circuit 416, the first phase shifter 417, the second phase shifter 418, the third phase shifter 419, and the fourth phase shifter 420 may be designed.
- the lengths of the first line 407, the second line 408, the third line 409, and the fourth line 410, the first matching circuit 413, the second matching circuit 414, and the absolute value of the amplitude are substantially the same.
- the third matching circuit 415 and the fourth matching circuit 416, and the first phase shifter 417, the second phase shifter 418, the third phase shifter 419, and the fourth phase shifter 420 may be designed. Thereby, the advantageous effect that the isolation between the 1st load circuit 421 and the 2nd load circuit 422 can be made still higher is acquired.
- the phase of the signal appearing on the first intersection 411 side of the first line 407 The first line 407 and the second line 408 so that the difference from the phase of the signal appearing on the first intersection 411 side of the second line 408 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the line length, the first matching circuit 413, the second matching circuit 414, the first phase shifter 417, and the second phase shifter 418 are designed.
- the phase difference is zero. Therefore, when a signal having the same phase and the same absolute value of amplitude is input to the first terminal 402 and the second terminal 403, the phase of the signal appearing on the first intersection 411 side of the first line 407 Since the difference from the phase of the signal appearing on the first intersection 411 side of the second line 408 is approximately 180 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0), at the first intersection 411, the common mode The signal current is canceled out, and the common mode signal does not substantially propagate from the first intersection 411 to the first load circuit side.
- the first intersection 411 Since the difference between the phase of the signal and the phase of the signal appearing on the first intersection 411 side of the second line 408 is approximately 0 ° ⁇ 360 ° * n (n is an integer of 0 or more), the first intersection 411 The differential mode signal currents are added together, and the differential mode signal propagates substantially from the first intersection 411 to the first load circuit side.
- the first terminal 402 and the second terminal 403 when signals having the same phase and the same absolute value of amplitude are input to the first terminal 402 and the second terminal 403, the signal appearing on the first intersection 411 side of the first line 407
- the difference between the phase and the phase of the signal appearing on the first intersection 411 side of the second line 408 to be approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more)
- the first Only a differential mode signal generated between the terminal 402 and the second terminal 403 can be selected and propagated to the first load circuit 421.
- the second line 408 has a condition where the difference from the phase of the signal appearing on the first intersection 411 side is approximately 180 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0), and the first signal is connected to the two terminals in the differential mode.
- n is an integer greater than or equal to 0
- the current of the common mode signal generated between the first terminal 402 and the second terminal 403 is added in phase at the second intersection point 412, and substantially from the second intersection point 412 to the second load circuit 422 side.
- the current of the differential mode signal generated between the first terminal 402 and the second terminal 403 is added in the opposite phase at the second intersection point 412 and canceled out. It is not substantially propagated to the second load circuit 422 side.
- the differential mode signal generated between the first terminal 402 and the second terminal 403 is propagated only to the first load circuit 421 side, and between the first terminal 402 and the second terminal 403.
- the generated common mode signal is generally propagated only to the second load circuit 422 side. That is, the signal transmission method 401 according to the eleventh embodiment can separately extract two modes of signals generated between the first terminal 402 and the second terminal 403.
- the first signal transmitted in the differential mode and the second signal having the same frequency as the first signal transmitted in the common mode are transmitted via the two-terminal pair line 6
- the first signal is extracted to the first load circuit 421 via the first intersection 411 and the second signal is extracted to the second load circuit 422 via the second intersection 412 without substantially interfering with each other.
- first signal and the second signal can be transmitted via the two-terminal pair line 406.
- the third line 409 is connected to the second intersection 412 side.
- the line lengths of the third line 409 and the fourth line 410 so that the absolute value of the amplitude of the appearing signal and the absolute value of the amplitude of the signal appearing on the second intersection 412 side of the fourth line 410 are substantially the same.
- the third matching circuit 415, the fourth matching circuit 416, the third phase shifter 419, and the fourth phase shifter 420 may be designed.
- the phase change amount from the first terminal 402 to the first intersection point 411 is approximately 90 ° ⁇ 360 ° * n (n is an integer of 0 or more), and the phase change amount from the second terminal 403 to the first intersection point 411 is The lengths of the first line 407 and the second line 8, the first matching circuit 413, the second matching circuit 414, and the like so that the amount is approximately ⁇ 90 degrees ⁇ 360 degrees * n (n is an integer of 0 or more)
- the first phase shifter 417 and the second phase shifter 418 may be designed.
- the amount of phase change from the first terminal 402 to the first intersection 411 is approximately 90 ° ⁇ 360 ° * n (n is Since the phase change amount from the second terminal 403 to the first intersection 411 is approximately ⁇ 90 degrees ⁇ 360 degrees * n (n is an integer greater than or equal to 0), the first intersection 411 Will cancel the common mode signal.
- the first intersection 411 is virtually grounded. Since the phase change amounts from the first intersection 411 virtually grounded to the first terminal 402 and the second terminal 403 are 90 degrees and ⁇ 90 degrees, respectively, from the first terminal 402 and the second terminal 403 The input impedance when viewing the first intersection 411 side is infinite. Therefore, the common mode signal generated between the first terminal 402 and the second terminal 403 does not substantially propagate to the first intersection 411 side, but substantially propagates to the second intersection 412 side. Thereby, the ratio of the common mode signal propagating to the second load circuit 422 to the differential mode signal can be further improved, and the ratio of the differential mode signal propagating to the first load circuit 421 to the common mode signal can be improved. Can be further improved.
- the first intersection 411 side of the first line 407 is obtained.
- the length, the first matching circuit 413, the second matching circuit 414, the first phase shifter 417, and the second phase shifter 418 may be designed.
- the phase change amount from the first terminal 402 to the second intersection point 411 is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more) and the phase change amount from the second terminal 403 to the second intersection point 412
- the lengths of the third line 409 and the fourth line 410, the third matching circuit 415, and the fourth matching circuit 416 are set so that the amount is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more).
- the third phase shifter 417 and the fourth phase shifter 418 may be designed.
- the second intersection 412 is a virtually grounded location. Since the phase change amounts from the virtually intersected second intersection 412 to the first terminal 402 and the second terminal 403 are both 90 degrees, the second intersection from the first terminal 402 and the second terminal 403, respectively.
- the input impedance when viewing the 412 side is infinite. Therefore, the differential mode signal generated between the first terminal 402 and the second terminal 403 does not substantially propagate to the second intersection 412 side, but propagates substantially to the first intersection 411 side. go.
- the ratio of the differential mode signal propagating to the first load circuit 422 to the common mode signal can be further improved, and the ratio of the common mode signal propagating to the second load circuit 422 to the differential mode signal can be improved. Can be further improved.
- the first matching circuit 413, the second matching circuit 414, the third matching circuit 415, the fourth matching circuit 416, the first phase shifter 417, the second phase shifter 418, the third phase shifter 419, the fourth A configuration in which at least one of the phase shifters 420 is eliminated may be employed.
- transmission loss in the first line 407, the second line 408, the third line 409, and the fourth line 410 can be reduced, and the number of necessary components can be reduced, thereby reducing the size and weight. it can.
- a matching circuit may be connected between at least one of the first intersection point 411 and the first load circuit 421 and between the second intersection point 412 and the second load circuit 422.
- the first matching circuit 413, the second matching circuit 414, the third matching circuit 415, the fourth matching circuit 416, the first phase shifter 417, the second phase shifter 418, the third phase shifter 419, the fourth phase shifter 420, and the like. Is basically designed by a circuit of a reactance element.
- a resistance element and an amplifier circuit for example, the first line 407 has a transmission path and a reception path, and It may be designed by a circuit including a trust amplifier circuit, a reception amplifier circuit, etc.). Accordingly, high isolation characteristics between the first load circuit 421 and the second load circuit 422 can be realized, and transmission / reception characteristics of the electronic device can be improved.
- signals are input / output from the sixth terminal 423, the seventh terminal 424, the eighth terminal 425, and the ninth terminal 426, but the number of input / output terminals is not limited to this. It is sufficient that a signal is input / output from at least one input / output terminal.
- the first matching circuit 413 and the third matching circuit 415 of the first signal demultiplexer 430 are connected to the first terminal 402 of the two-terminal pair line 406, and the first signal demultiplexer 430
- the second matching circuit 414 and the fourth matching circuit 416 are connected to the second terminal 403 of the two-terminal pair line 427.
- the first matching circuit 413 and the third matching circuit 415 of the second signal demultiplexer 431 are connected to the tenth terminal 428 of the two-terminal pair line 406, and the second signal demultiplexer 431 has the second The matching circuit 414 and the fourth matching circuit 416 are connected to the eleventh terminal 429 of the two-terminal pair line 406.
- the first intersection 411 of the first signal demultiplexer 430 and the first load circuit 421 are connected, and the second intersection 412 of the first signal demultiplexer 430 and the second load circuit 422 are connected, Further, the first intersection 411 of the second signal demultiplexer 431 and the third load circuit 432 are connected, and the second intersection 412 of the second signal demultiplexer 431 and the fourth load circuit 433 are connected.
- the first signal is differentially transmitted through the two-terminal pair line 427.
- the second signal propagates in the common mode through the two-terminal pair line 427. That is, the first signal and the second signal are mixed in the two-terminal pair line 427 and propagate.
- the signal transmission method according to the eleventh embodiment of the present invention it is possible to transmit and receive two types of signals using only one two-terminal pair line 406. Therefore, it is possible to increase the amount of signal transmission by performing signal transmission using both the differential mode and the common mode.
- the signal transmission method 401 according to the eleventh embodiment is different from the sixth terminal 423 and the seventh terminal 424 of the two-terminal pair line 406 or the differential mode and the common mode from the eighth terminal 425 and the ninth terminal 426, for example.
- the first signal and the second signal may be input / output and the first signal demultiplexer 430 and the second signal demultiplexer 431 may receive them.
- signals can be transmitted to a number of load circuits hanging on the network.
- the cross-sectional shape of the two-terminal pair line 406 may have a shape that is substantially plane-symmetric. By adopting such a shape, for example, it is possible to prevent a common mode signal from being converted to the differential mode while propagating through the two-terminal pair line 406.
- 29 and 30 are diagrams showing a cross-sectional shape of a two-terminal pair line used in the signal transmission method according to the eleventh embodiment of the present invention.
- the two-terminal pair line 406 includes a first transmission line 434 and a second transmission line 435, and a shield conductor 437 is provided so as to surround the first transmission line 434 and the second transmission line 435.
- the first transmission line 434, the second transmission line 435, and the shield conductor 437 have a substantially plane-symmetrical configuration with respect to the plane 438.
- the two-terminal pair line 406 includes a first transmission line 434 and a second transmission line 435, and a shield conductor so as to surround the first transmission line 434 and the second transmission line 435. 437.
- the first transmission line 434, the second transmission line 435, and the shield conductor 437 have a substantially plane-symmetrical configuration with respect to the plane 438.
- a common mode signal is transmitted through the two-terminal pair line 406. It is possible to prevent the conversion to the differential mode. Accordingly, it is possible to prevent interference between two signals of the differential mode and the common mode transmitted through the two-terminal pair line 406.
- the two-terminal pair line 406 shown in FIGS. 29 and 30 has a shield conductor 437 on the outer side so as to surround the first transmission line 434 and the second transmission line 435.
- the two-terminal pair line 406 has a shield conductor 437, and consideration is given to prevent noise from leaking onto the two-terminal pair line 406 by the shield conductor 437. ing.
- the two-terminal pair line 406 shown in FIGS. 29 and 30 has a shield conductor 437. 29 and 30, the shield conductor 437 is shown as a single one. However, this may be replaced with a double or more. As a result, resistance to noise from the outside is improved, and common mode radiation can be further suppressed.
- FIGS. 31 and 32 are diagrams showing another cross-sectional shape of a two-terminal pair line used in the signal transmission system according to the eleventh embodiment of the present invention.
- the two-terminal pair line 406 includes a first transmission line 434 and a second transmission line 435 and a shield conductor 437 adjacent to the first transmission line 434 and the second transmission line 435.
- the first transmission line 434, the second transmission line 435, and the shield conductor 437 are formed on the surface layer of the high-frequency substrate 439 (which may be an inner layer, and may not be DC-conductive with the shield conductor 437).
- the first transmission line 434, the second transmission line 435, and the shield conductor 437 have a substantially plane-symmetrical configuration with respect to the plane 438.
- the shield conductor 437 is also formed in the layer where the first transmission line 434 and the second transmission line 435 are formed. Yes. 32, the first transmission line 434, the second transmission line 435, and the shield conductor 437 are substantially plane-symmetric with respect to the plane 438.
- a common mode signal is transmitted through the two-terminal pair line 406. It is possible to prevent the conversion to the differential mode. Accordingly, it is possible to prevent interference between two signals of the differential mode and the common mode transmitted through the two-terminal pair line 406.
- the shield conductor 437 functions so that noise does not leak onto the two-terminal pair line 406, and the common being transmitted through the two-terminal pair line 406. It functions so that the mode signal does not radiate.
- first transmission line 434 and the second transmission line 435 shown in FIG. 31 have the shield conductor 437 disposed only below them, but the shield conductor may be disposed further above. Thereby, the shielding effect is further enhanced.
- a modulation scheme having a large transmission amount for example, 64QAM or 16QAM
- a signal having a relatively small transmission amount for example, QPSK or BPSK
- a high signal quality value is required at the time of reception. Therefore, it is possible to increase the transmission amount as a whole by assigning a signal requiring a high signal quality value to a transmission signal in a differential mode that is more resistant to noise.
- the “signal quality value” indicates, for example, an index representing a signal / noise ratio such as a C / N ratio or an S / N ratio.
- the amount of noise received by the two-terminal pair circuit 406 can be grasped in the second load circuit 422 or the fourth load circuit 433 that receives the common mode. Is possible.
- the fourth load circuit 433 receives external noise received by the two-terminal pair line 406, and the above condition is satisfied for the amplitude and phase of this noise (the absolute value of the amplitude is equal, and the transfer is in reverse phase).
- the signal quality of signal 1 can be obtained by combining the signal 1 received by the third load circuit 432 while canceling the noise leaked into the signal 1 during transmission through the two-terminal pair line 406. Can be improved.
- the ratio of noise received by the fourth load circuit 433 to signal 1 (noise / signal 1) can be made very large. Therefore, a very good noise cancellation system can be constructed. This is because most of external noise can be extracted by the fourth load circuit 433 because the external noise is mainly transmitted through the two-terminal pair line 406 in the common mode.
- the fact that the signal 1 is hardly received by the fourth load circuit 433 is one of the reasons why the noise cancellation system having the configuration as in the eleventh embodiment of the present invention has very excellent performance. Yes. If the fourth load circuit 433 receives the signal 1 together with the noise, when the signal 1 received by the third load circuit 432 is combined, the signal 1 itself is reduced. is there.
- the frequencies of the first signal and the second signal may be the same or different.
- a system that transmits and receives signals by a pair of the first signal demultiplexer 430 and the second signal demultiplexer 431 can be configured.
- the present invention is not limited thereto, and three or more signal demultiplexers may be connected to the two-terminal pair line 406 to perform transmission / reception using a plurality of signal demultiplexer pairs.
- the frequencies used may be different or transmission / reception timings may be shifted. Thereby, interference between each pair of signal demultiplexers can be reduced.
- the first signal transmitted from the first load circuit 421 to the first intersection 411 and the second signal transmitted from the second load circuit 422 to the second intersection 412 may be the same signal. Thereby, it becomes possible to transmit a signal more reliably.
- the first signal and the second signal are the same signal, when the signal is input from the first terminal 2, the signal appearing on the first intersection 411 side of the first line 407 and the second signal of the third line 409 are displayed.
- the first intersection 411 of the second line 408 when the phase difference from the signal appearing on the intersection 412 side is 90 ° ⁇ 180 ° * n (n is an integer of 0 or more) and the signal is input from the second terminal 403.
- the first signal demultiplexer so that the phase difference between the signal appearing on the side and the signal appearing on the second intersection 412 side of the fourth line 410 is 90 ° ⁇ 180 ° * n (n is an integer of 0 or more).
- 430 and the second signal duplexer 431 may be designed.
- the first signal and the second signal are combined with a phase difference of 90 ° ⁇ 180 ° * n (n is an integer of 0 or more) on the two-terminal pair line 406. Therefore, as the first signal and the second signal are combined on the two-terminal pair line 406 with a phase difference of 0 ° ⁇ 180 ° * n (n is an integer of 0 or more), the two-terminal pair It is possible to prevent large amplitudes of current and voltage from being generated on the line 406, and to prevent breakage due to the voltage and current generated by the two-terminal pair line 406.
- FIG. 33 shows a case where a differential mode signal is transmitted to the two-terminal-pair line 1906
- FIG. 34 shows a case where a common-mode signal is transmitted to the two-terminal-pair line 1906.
- the input impedance of the first transmission line 1934 viewed from the first terminal 1902 and the input impedance of the second transmission line 1935 viewed from the second terminal 1903 are in series. Therefore, the input impedance of the two-terminal pair line 1906 viewed from the first terminal 1902 and the second terminal 1903 is 100 ⁇ .
- the input impedance of the first transmission line 1934 viewed from the first terminal 1902 and the input impedance of the second transmission line 1935 viewed from the second terminal 1903 are parallel. Therefore, the input impedance of the two-terminal pair line 1906 viewed from the first terminal 1902 and the second terminal 1903 is 25 ⁇ .
- the input impedance of the two-terminal pair line 1906 (port number 3) in FIG. 33 is 100 ⁇
- the first load circuit 1921 (port number 1) and the second load circuit 1922 (port number 2) in FIG. 33 and the first load circuit 1921 in FIG. (Port number 4) and the second load circuit 1922 (port number 5) were designed with their input impedance set to 50 ⁇ .
- the first phase shifter 1917, the second phase shifter 1918, the third phase shifter 1919, and the fourth phase shifter 1920 are each realized by three reactance elements.
- FIG. 35 shows a two-terminal pair line 1906 (port number 3), a first load circuit 1921 (port number 1), and a second terminal when a differential mode signal is transmitted to the two-terminal pair line 1906 shown in FIG.
- the passing characteristic with the load circuit 1922 (port number 2) is shown.
- S (3, 1) indicates a passing characteristic from the first load circuit 1921 (port number 1) to the two-terminal pair line 1906 (port number 3).
- the passing characteristic S (3, 1) from the first load circuit 1921 (port number 1) to the two-terminal-pair line 1906 (port number 3) is almost 0 dB at 620 MHz, indicating that it is in a conductive state. I understand.
- the pass characteristic S (3, 2) from the second load circuit 1922 (port number 2) to the two-terminal pair line 1906 (port number 3) is ⁇ 30 dB or less at 620 MHz, and high isolation is achieved. You can see that it is removed.
- the pass characteristic S (2, 1) from the first load circuit 1921 (port number 1) to the second load circuit 1922 (port number 2) is ⁇ 30 dB or less at 620 MHz, and high isolation is obtained. I understand that.
- FIG. 36 shows a two-terminal pair line 1906 (port number 6), a first load circuit 1921 (port number 4), and a second one when a common mode signal is transmitted to the two-terminal pair line 1906 shown in FIG.
- the passing characteristic with the load circuit 1922 (port number 5) is shown.
- S (6, 4) indicates a passing characteristic from the first load circuit 1921 (port number 4) to the two-terminal pair line 1906 (port number 6).
- the pass characteristic S (6, 5) from the second load circuit 1922 (port number 5) to the two-terminal-pair line 1906 (port number 6) is almost 0 dB at 620 MHz, indicating that it is in a conductive state. I understand.
- the pass characteristic S (6, 4) from the first load circuit 1921 (port number 4) to the two-terminal pair line 1906 (port number 6) is ⁇ 30 dB or less at 620 MHz, and high isolation is achieved. You can see that it is removed. Also, the passing characteristic S (5, 4) from the first load circuit 1921 (port number 4) to the second load circuit 1922 (port number 5) is ⁇ 30 dB or less at 620 MHz, and high isolation is obtained. I understand that.
- FIGS. 37 to 42 show impedance characteristics of the ports having port numbers 1 to 6.
- S (1,1) indicates an input impedance characteristic when the first intersection 1911 side is viewed from the first load circuit 1921 in FIG.
- the characteristic impedances of the first line, the second line, the third line, and the fourth line are all Zo and connected to the first intersection.
- Input impedance viewed from the first intersection of the first load circuit, input impedance viewed from the second intersection of the second load circuit connected to the second intersection, and the first transmission line viewed from the first terminal You may design so that both input impedance and the input impedance of the 2nd transmission line seen from the 2nd terminal may be substantially Zo / 2.
- impedance matching between the two-terminal-pair line 1906, the first signal distributor 1930, and the first load circuit 1921 or the second load circuit 1922 can be easily achieved, and reflection loss can be reduced.
- FIG. 33 and FIG. 34 satisfy the above-mentioned impedance relationship, and as a result, good electrical characteristics can be realized as shown in FIG. 35 to FIG.
- the first load circuit, the second load circuit, the third load circuit, and the fourth load circuit in the ninth to eleventh embodiments are actually communication circuits that receive and transmit signals, It represents a signal processing unit and is mounted on a mounting board or the like mounted inside the electronic device.
- the “signal processing unit” means, for example, a circuit that demodulates a signal to be transmitted, amplifies, band-limits, frequency conversion, and the like, or amplifies a received signal to receive a signal, band-limits, frequency It refers to a circuit that performs operations such as conversion, extraction, and data extraction after demodulation.
- the first line 1907 which is one line, one first matching circuit 1913, and one first phase shifter.
- it may be configured by a plurality of lines, a plurality of matching circuits, and a plurality of phase circuits.
- the “first line”, “second line”, “third line”, and “fourth line” include those composed of a plurality of lines.
- the “first matching circuit”, “second matching circuit”, “third matching circuit”, and “fourth matching circuit” include those configured by a plurality of matching circuits.
- the “one phase shifter”, “second phase shifter”, “third phase shifter”, and “fourth phase shifter” include those composed of a plurality of phase shifters.
- the signal demultiplexer according to the present invention can generally provide isolation between the first intersection and the second intersection, and the first intersection and the second intersection can be separated from the network. Since signals can be exchanged independently of each other, a duplexer that can transmit and receive signals of the same frequency at the same time, a small diversity antenna, etc. can be realized and used for small portable communication terminals, etc. Can do.
- the antenna device using the signal branching filter of the present invention can generally provide isolation between the first intersection and the second intersection, thereby the first intersection and the second intersection.
- Means that a diversity antenna that can send and receive signals of the same frequency at the same time can be realized and can be used for small portable communication terminals. I can do it.
- the signal transmission method using the signal demultiplexer according to the present invention can transmit and receive signals of the same frequency at the same time using one two-terminal pair line, and can reduce the amount of data transmitted. It can be used for communication equipment that needs to be improved.
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Abstract
Description
2 第1端子
3 第2端子
4 第3端子
5 第4端子
6 回路網
7 第1線路
8 第2線路
9 第3線路
10 第4線路
11 第1交点
12 第2交点
13 第1整合回路
14 第2整合回路
15 第3整合回路
16 第4整合回路
17 第1位相器
18 第2位相器
19 第3位相器
20 第4位相器
21 第1負荷回路
22 第2負荷回路
501 アンテナ装置
834 グランド板
835 第1エレメント
836 第2エレメント
837 第3エレメント
838 第4エレメント
927 2端子対線路
図1は、本発明の実施の形態1に係る信号分波器のブロック図である。図1において、本実施の形態1の信号分波器1は、第1端子2、第2端子3、第3端子4、および第4端子5の4端子を少なくとも有する回路網6に接続される信号分波器1である。そして、回路網6の第1端子2に一方が接続される第1線路7と、回路網6の第2端子3に一方が接続される第2線路8と、回路網6の第3端子4に一方が接続される第3線路9と、回路網6の第4端子5に一方が接続される第4線路10とを有し、第1線路7の他方と第2線路8の他方とは第1交点11において接続され、第3線路9の他方と第4線路10の他方とは第2交点12において接続されている。
図2は、本発明の実施の形態2に係る信号分波器のブロック図である。尚、実施の形態1と同様の構成については、同一符号のみ記載し、異なる構成を中心に、以下に説明する。
図3は、本発明の実施の形態3に係る信号分波器1のブロック図である。尚、実施の形態1と同様の構成については、同一符号のみ記載し、異なる構成を中心に、以下に説明する。
以下、実施の形態4において、本発明の信号分波器を利用した電子機器の一例であるアンテナ装置について、説明する。理解が容易となるように、最初に、一般的な携帯電話等の無線端末で用いられるダイバーシティアンテナについて、図4を用いて説明する。その後、本発明の信号分波器を利用したアンテナ装置の説明を行う。
図6は、本発明の実施の形態5に係るアンテナ装置のブロック図である。尚、実施の形態4と同様の構成については、同一符号のみ記載し、異なる構成を中心に、以下に説明する。
図7は、本発明の実施の形態6に係るアンテナ装置701のブロック図である。尚、実施の形態4と同様の構成については、同一符号のみ記載し、異なる構成を中心に、以下に説明する。
図8は本発明の実施の形態7に係る信号分波器を使用した信号伝送の方法を示す図である。尚、実施の形態6と同様の構成については、同一符号のみ記載し、異なる構成を中心に、以下に説明する。
図23は本発明の実施の形態4~6に係るアンテナ装置を電子機器に使用した場合のブロック図である。尚、実施の形態6と同様の構成については、同一符号のみ記載し、異なる構成を中心に、以下に説明する。
以下、実施の形態9として、本発明の信号分波器を用いた電子機器の一例として、信号伝送方式の事例を説明する。理解を容易にするために、最初に一般の信号伝送方式について図25を用いて説明し、その後、本発明の信号分配器を用いた、又は、その原理を利用した信号伝送方式について説明する。
図27は、本発明の実施の形態10に係る信号伝送方式のブロック図である。尚、実施の形態9と同様の構成については、同一符号のみ記載し、異なる構成を中心に、以下に説明する。
図28は、本発明の実施の形態11に係る信号伝送方式のブロック図である。尚、実施の形態9と同様の構成については、同一符号のみ記載し、異なる構成を中心に、以下に説明する。
図33から図42には、第1端子1902から2端子対線路1906を見たときの入力インピーダンスが50Ωとなり、第2端子1903から2端子対線路1906を見たときの入力インピーダンスが50Ωとなる2端子対線路1906を用いて、620MHzにおいて本実施の形態12の信号伝送方式1901を設計した一例を示している。図33から図42において、freqは周波数を示し、impedanceはインピーダンスを示す。
Claims (35)
- 少なくとも4端子を有する回路網に接続される信号分波器であって、
この回路網の第1端子に一方が接続される第1線路と、
前記回路網の第2端子に一方が接続される第2線路と、
前記回路網の第3端子に一方が接続される第3線路と、
前記回路網の第4端子に一方が接続される第4線路と、を有し、
前記第1線路の他方と前記第2線路の他方とは第1交点において接続され、
前記第3線路の他方と前記第4線路の他方とは第2交点において接続され、
前記第1交点から信号を入力した場合、
前記第3線路の前記第2交点側に現れる信号の位相と、前記第4線路の前記第2交点側に現れる信号の位相との位相差が180度となる
信号分波器。 - 第1端子に一方が接続される第1線路と、
前記第1端子に一方が接続される第3線路と、
第2端子に一方が接続される第2線路と、
前記第2端子に一方が接続される第4線路と、を有し、
前記第1線路の他方と前記第2線路の他方とは第1交点に接続され、
前記第3線路の他方と前記第4線路の他方とは第2交点に接続され、
前記第1交点から信号を入力した場合、
前記第3線路の前記第2交点側に現れる信号の位相と、前記第4線路の前記第2交点側に現れる信号の位相との位相差が180度となる
信号分波器。 - 前記第1交点から信号を入力した場合、
前記第3線路の前記第2交点側に現れる信号の振幅の絶対値と、前記第4線路の前記第2交点側に現れる信号の振幅の絶対値とが同一である
請求項1または請求項2のいずれか一つに記載の信号分波器。 - 少なくとも3端子を有する回路網に接続される信号分波器であって、
この回路網の第1端子に一方が接続される第1線路と、
前記回路網の第2端子に一方が接続される第2線路と、
前記回路網の第3端子に一方が接続される第3線路と、を有し、
前記第1線路の他方と前記第2線路の他方とは第1交点に接続され、
前記第3線路の他方から信号を入力した場合、
前記第1線路の前記第1交点側に現れる信号の位相と、前記第2線路の前記第1交点側に現れる信号の位相との位相差が180度となる
信号分波器。 - 前記第3線路の他方から信号を入力した場合、
前記第1線路の前記第1交点側に現れる信号の振幅の絶対値と、前記第2線路の前記第1交点側に現れる信号の振幅の絶対値とが同一である
請求項4に記載の信号分波器。 - 前記第1端子と、前記第2端子とに、同位相であり、且つ、同振幅の信号を入力した場合、
前記第1線路の前記第1交点側に現れる信号の位相と、前記第2線路の前記第1交点側に現れる信号の位相との差が180度となる
請求項1、請求項2、請求項4のいずれか一つの請求項に記載の信号分波器。 - 前記第1端子から前記第1交点までの位相変化量が90度±360度*n(nは0以上の整数)であると共に、
前記第2端子から前記第1交点までの位相変化量が-90度±360度*n(nは0以上の整数)である
請求項1、請求項2、請求項4のいずれか一つの請求項に記載の信号分波器。 - 前記第1端子と、前記第2端子とに、同位相であり、且つ、同振幅の信号を入力した場合、
前記第1線路の前記第1交点側に現れる信号の振幅の絶対値と、前記第2線路の前記第1交点側に現れる信号の振幅の絶対値とが同一となる
請求項6または請求項7のいずれか一つに記載の信号分波器。 - 前記第1端子又は前記第3端子から前記第2交点までの位相変化量が+90度±180度*n(nは0以上の整数)であると共に、
前記第2端子又は前記第4端子から前記第2交点までの位相変化量が+90度±180度*n(nは0以上の整数)である
請求項1又は請求項2のいずれか一つに記載の信号分波器。 - 前記第1端子と、前記第2端子とに位相差180度であり、且つ、同振幅の信号を入力した場合、又は、
前記第3端子と、前記第4端子とに位相差180度であり、且つ、同振幅の信号を入力した場合に、
前記第3線路の前記第2交点側に現れる信号の振幅の絶対値と、前記第4線路の前記第2交点側に現れる信号の振幅の絶対値とが同一となる
請求項1または請求項2のいずれか一つに記載の信号分波器。 - 前記第1端子と前記第2端子とは、前記回路網に接続される
請求項2に記載の信号分波器。 - 請求項1、請求項2、請求項4のいずれか一つに記載の信号分波器と、
前記信号分波器に接続された前記回路網と、
前記信号分波器に接続された信号処理部と、を有する
電子機器。 - 請求項1に記載の信号分波器を備え、
前記回路網は、前記第1端子と前記第2端子と前記第3端子と前記第4端子とを有するアンテナ素子であることを特徴とする
アンテナ装置。 - 請求項4に記載の信号分波器を備え、
前記回路網は、前記第1端子と前記第2端子と前記第3端子とを有するアンテナ素子であることを特徴とする
アンテナ装置。 - 請求項11に記載の信号分波器を備え、
前記回路網は、前記第1端子と前記第2端子とを有するアンテナ素子であることを特徴とする
アンテナ装置。 - 前記第1端子と前記第2端子とを結ぶ第1直線上の前記第1端子と前記第2端子との中点において、前記第1直線に垂直な第2直線または第1面に対して、前記アンテナ素子は線対称形状または面対称形状を有すると共に、
前記第3端子と前記第4端子とを結ぶ第3直線上の前記第3端子と前記第4端子との中点において、前記第3直線に垂直な第2直線または第1面に対して、前記アンテナ素子は線対称形状または面対称形状を有する
請求項13に記載のアンテナ装置。 - 前記第1端子と前記第2端子とを結ぶ第1直線上の前記第1端子と前記第2端子との中点において、前記第1直線に垂直な第2直線または第1面に対して、前記アンテナ素子は線対称形状または面対称形状を有する
請求項15に記載のアンテナ装置。 - 前記第1端子と前記第2端子とを結ぶ第1直線上の前記第1端子と前記第2端子との中点において、前記第1直線に垂直な第2直線または第1面に対して、前記アンテナ素子は線対称形状または面対称形状を有すると共に、
前記第2直線上、又は前記第1面上に前記第3端子が存在する
請求項14に記載のアンテナ装置。 - 前記第1線路と、前記第2線路と、前記第3線路と、前記第4線路の特性インピーダンスが共にZoであると共に、
前記第1交点に接続される第1負荷回路の前記第1交点から見た入力インピーダンスと、
前記第2交点に接続される第2負荷回路の前記第2交点から見た入力インピーダンスと、
前記第1端子から見た前記アンテナ素子の入力インピーダンスと、
前記第2端子から見た前記アンテナ素子の入力インピーダンスとが共にZo/2である
請求項13、請求項14、請求項15のいずれか一つに記載のアンテナ装置。 - 第1信号をディファレンシャルモードにより2端子対線路を用いて伝送し、
第2信号をコモンモードにより前記2端子対線路を用いて伝送する
信号伝送方式。 - 前記2端子対線路は、その断面において、前記2端子対線路を囲むシールド導体を有する
請求項20に記載の信号伝送方式。 - 前記2端子対線路の断面形状は面対称である
請求項20に記載の信号伝送方式。 - 前記第1信号を受信する上で必要となる信号品質値は、
前記第2信号を受信する上で必要となる信号品質値よりも高い
請求項20に記載の信号伝送方式。 - 前記2端子対線路は、第1伝送線と第2伝送線とを備えており、
前記第1伝送線は、第1端子と第3端子とを有し、
前記第2伝送線は、第2端子と第4端子とを有していると共に、
前記信号伝送方式は、
前記第1端子に一方が接続される第1線路と、
前記第2端子に一方が接続される第2線路と、
前記第3端子に一方が接続される第3線路と、
前記第4端子に一方が接続される第4線路と、を有した信号分波器を備え、
前記第1線路の他方と前記第2線路の他方とは第1交点において接続され、
前記第3線路の他方と前記第4線路の他方とは第2交点において接続され、
前記第1交点から信号を入力した場合、
前記第3線路の前記第2交点側に現れる信号の位相と、前記第4線路の前記第2交点側に現れる信号の位相との位相差が180度となり、
前記第1端子と、前記第2端子とに、同位相であり、且つ、同振幅の信号を入力した場合、
前記第1線路の前記第1交点側に現れる信号の位相と、前記第2線路の前記第1交点側に現れる信号の位相との差が180度となると共に、
前記第1信号の伝送は第1交点から行われ、
前記第2信号の伝送は第2交点から行われる
請求項20に記載の信号伝送方式。 - 前記2端子対線路は、第1伝送線と第2伝送線とを備えており、
前記第1伝送線は、第1端子を有し、
前記第2伝送線は、第2端子を有していると共に、
前記信号伝送方式は、
前記第1端子に一方が接続される第1線路と、
前記第1端子に一方が接続される第3線路と、
前記第2端子に一方が接続される第2線路と、
前記第2端子に一方が接続される第4線路と、を有した信号分波器を備え、
前記第1線路の他方と前記第2線路の他方とは第1交点に接続され、
前記第3線路の他方と前記第4線路の他方とは第2交点に接続され、
前記第1交点から信号を入力した場合、
前記第3線路の前記第2交点側に現れる信号の位相と、前記第4線路の前記第2交点側に現れる信号の位相との位相差が180度となり、
前記第1端子と、前記第2端子とに、同位相であり、且つ、同振幅の信号を入力した場合、
前記第1線路の前記第1交点側に現れる信号の位相と、前記第2線路の前記第1交点側に現れる信号の位相との差が180度となると共に、
前記第1信号の伝送は第1交点から行われ、
前記第2信号の伝送は第2交点から行われる
請求項20に記載の信号伝送方式。 - 前記第1交点から信号を入力した場合、
前記第3線路の前記第2交点側に現れる信号の振幅の絶対値と、前記第4線路の前記第2交点側に現れる信号の振幅の絶対値とが同一である
請求項24または請求項25のいずれか一つに記載の信号伝送方式。 - 前記2端子対線路は、第1伝送線と第2伝送線とを備えており、
前記第1伝送線は、第1端子と第3端子とを有し、
前記第2伝送線は、第2端子と第4端子とを有し、
前記第3端子と前記第4端子とを接続する短絡線上に第5端子を有すると共に、
前記信号伝送方式は、
前記第1端子に一方が接続される第1線路と、
前記第2端子に一方が接続される第2線路と、
前記第5端子に一方が接続される第3線路と、を有した信号分波器を備え、
前記第1線路の他方と前記第2線路の他方とは第1交点に接続され、
前記第3線路の他方から信号を入力した場合、
前記第1線路の前記第1交点側に現れる信号の位相と、前記第2線路の前記第1交点側に現れる信号の位相との位相差が180度となり、
前記第1端子から前記第5端子までの位相変化量と、前記第2端子から前記第5端子までの位相変化量はに同一となり、
前記第1端子と、前記第2端子とに、同位相であり、且つ、同振幅の信号を入力した場合、
前記第1線路の前記第1交点側に現れる信号の位相と、前記第2線路の前記第1交点側に現れる信号の位相との差が180度となると共に、
前記第1信号の伝送は第1交点から行われ、
前記第2信号の伝送は第2交点から行われる
請求項20に記載の信号伝送方式。 - 前記第3線路の他方から信号を入力した場合、
前記第1線路の前記第1交点側に現れる信号の振幅の絶対値と、前記第2線路の前記第1交点側に現れる信号の振幅の絶対値とが同一である
請求項27に記載の信号伝送方式。 - 前記第1端子から前記第1交点までの位相変化量が+90度±360度*n(nは0以上の整数)であると共に、
前記第2端子から前記第1交点までの位相変化量が-90度±360度*n(nは0以上の整数)である
請求項24、請求項25、請求項27いずれか一つに記載の信号伝送方式。 - 前記第1端子と、前記第2端子とに、同位相であり、且つ、同振幅の信号を入力した場合、
前記第1線路の前記第1交点側に現れる信号の振幅の絶対値と、前記第2線路の前記第1交点側に現れる信号の振幅の絶対値とが同一となる請求項24、請求項25、請求項27いずれか一つの請求項に記載の信号伝送方式。 - 前記第1端子又は前記第3端子から前記第2交点までの位相変化量が+90度±180度*n(nは0以上の整数)であると共に、
前記第2端子又は前記第4端子から前記第2交点までの位相変化量が+90度±180度*n(nは0以上の整数)である
請求項24又は請求項25のいずれか一つに記載の信号伝送方式。 - 前記第1端子と、前記第2端子とに位相差180度であり、且つ、同振幅の信号を入力した場合、又は、
前記第3端子と、前記第4端子とに位相差180度であり、且つ、同振幅の信号を入力した場合に、
前記第3線路の前記第2交点側に現れる信号の振幅の絶対値と、前記第4線路の前記第2交点側に現れる信号の振幅の絶対値とが同一となる
請求項24または請求項25のいずれか一つに記載の信号伝送方式。 - 前記第1線路と、前記第2線路と、前記第3線路と、前記第4線路の特性インピーダンスが共にZoであると共に、
前記第1交点に接続される第1負荷回路の前記第1交点から見た入力インピーダンスと、
前記第2交点に接続される第2負荷回路の前記第2交点から見た入力インピーダンスと、
前記第1端子から見た前記第1伝送線の入力インピーダンスと、
前記第2端子から見た前記第2伝送線の入力インピーダンスと、が共にZo/2である
請求項24、請求項25、請求項27のいずれか一つに記載の信号伝送方式。 - 前記第1信号と前記第2信号が同一の信号である
請求項24、請求項25、請求項27のいずれか一つに記載の信号伝送方式。 - 前記第1端子から信号を入力した場合に、
前記第1線路の前記第1交点側に現れる信号と、前記第3線路の前記第2交点側に現れる信号との位相差が90度±180度*n(nは0以上の整数)であり、
前記第2端子から信号を入力した場合に、
前記第2線路の前記第1交点側に現れる信号と、前記第4線路の前記第2交点側に現れる信号との位相差が90度±180度*n(nは0以上の整数)である
請求項34に記載の信号伝送方式。
Priority Applications (4)
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CN2009801087419A CN101971492A (zh) | 2008-03-13 | 2009-03-12 | 信号分波器和使用它的电子设备、天线装置及信号传输方法 |
JP2010502726A JPWO2009113307A1 (ja) | 2008-03-13 | 2009-03-12 | 信号分波器とこれを用いた電子機器、アンテナ装置およびこれらに使われる信号伝送方式 |
EP09719425A EP2251978A1 (en) | 2008-03-13 | 2009-03-12 | Signal branching filter, electronic device using the same, antenna apparatus, and signal transmission system used in all of the above |
US12/921,577 US8816794B2 (en) | 2008-03-13 | 2009-03-12 | Signal branching filter, electronic device using the same, antenna apparatus, and signal transmission system used in all of the above |
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EP (1) | EP2251978A1 (ja) |
JP (1) | JPWO2009113307A1 (ja) |
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JP2014053813A (ja) * | 2012-09-07 | 2014-03-20 | Renesas Electronics Corp | 無線通信システムおよび無線通信装置 |
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JP5380997B2 (ja) * | 2008-10-15 | 2014-01-08 | パナソニック株式会社 | ダイバーシティアンテナ装置と、これを用いた電子機器 |
US8515365B2 (en) * | 2011-02-11 | 2013-08-20 | Realtek Semiconductor Corp. | Signal processing circuit and method thereof |
US9628752B2 (en) * | 2011-09-06 | 2017-04-18 | Comcast Cable Communications, Llc | Transmitting signals using directional diversity over a network |
US9503250B2 (en) * | 2011-10-28 | 2016-11-22 | Koninklijke Philips N.V. | Data communication with interventional instruments |
EP2741422B1 (en) * | 2012-12-05 | 2015-07-01 | Nxp B.V. | A concurrent multiband transceiver |
EP2741424A1 (en) | 2012-12-05 | 2014-06-11 | Nxp B.V. | A concurrent multiband transceiver |
CN103258630B (zh) * | 2013-06-03 | 2016-02-17 | 国网新疆电力公司吐鲁番供电公司 | 低噪音变压器 |
CN105453338A (zh) * | 2013-06-28 | 2016-03-30 | 诺基亚技术有限公司 | 用于天线的方法和设备 |
CN105637770B (zh) * | 2013-10-16 | 2018-07-10 | 株式会社村田制作所 | 收发装置 |
CN104993240A (zh) * | 2015-06-25 | 2015-10-21 | 上海安费诺永亿通讯电子有限公司 | 一种大幅度提高天线隔离度的方法及天线 |
CN106487614A (zh) * | 2015-08-26 | 2017-03-08 | 中兴通讯股份有限公司 | 电话线与网线复用的方法及装置 |
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- 2009-03-12 EP EP09719425A patent/EP2251978A1/en not_active Withdrawn
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- 2009-03-12 CN CN2013102695373A patent/CN103401522A/zh active Pending
- 2009-03-12 WO PCT/JP2009/001107 patent/WO2009113307A1/ja active Application Filing
- 2009-03-12 KR KR1020107020285A patent/KR20100132952A/ko not_active Application Discontinuation
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JPS61270903A (ja) * | 1985-03-30 | 1986-12-01 | ビ−・エス・エイチ、エレクトロニクス、リミテツド | 信号分離装置 |
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CN103401522A (zh) | 2013-11-20 |
CN101971492A (zh) | 2011-02-09 |
US8816794B2 (en) | 2014-08-26 |
KR20100132952A (ko) | 2010-12-20 |
EP2251978A1 (en) | 2010-11-17 |
US20110038429A1 (en) | 2011-02-17 |
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