WO2010013430A1 - アンテナ装置と、これを用いた通信機器 - Google Patents
アンテナ装置と、これを用いた通信機器 Download PDFInfo
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- WO2010013430A1 WO2010013430A1 PCT/JP2009/003513 JP2009003513W WO2010013430A1 WO 2010013430 A1 WO2010013430 A1 WO 2010013430A1 JP 2009003513 W JP2009003513 W JP 2009003513W WO 2010013430 A1 WO2010013430 A1 WO 2010013430A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/24—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
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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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
Definitions
- the present invention relates to a diversity reception type television receiver mounted in a car or the like, a communication apparatus such as a MIMO (data transmission / reception using a plurality of antennas) system, and an antenna apparatus used for the communication apparatus.
- a communication apparatus such as a MIMO (data transmission / reception using a plurality of antennas) system
- an antenna apparatus used for the communication apparatus.
- a conventional television receiving diversity antenna device mounted on a vehicle will be described with reference to FIGS.
- FIG. 30 is a diagram showing an example of mounting a conventional diversity antenna on a vehicle.
- a conventional television reception diversity antenna includes a first film antenna 101 attached to the upper region of the windshield 100 and a first antenna attached to the upper region of the windshield 100 apart from the first film antenna 101. 2 film antenna 102.
- a first active circuit 103 is connected to the first film antenna 101, and a second active circuit 104 is connected to the second film antenna 102.
- the conventional television reception diversity antenna apparatus includes a first transmission line 105 connected to the first active circuit 103 and a second transmission line 106 connected to the second active circuit 104, which It is connected to the unit (107 in FIG. 31).
- FIG. 31 is a circuit block diagram of a conventional antenna apparatus for diversity reception for television reception.
- a conventional television receiving diversity antenna device 108 includes a first active circuit 103 connected to the first film antenna 101 and a second active circuit 104 connected to the second film antenna 102.
- the conventional television receiving diversity antenna device includes a first transmission line 105 connected to the first active circuit 103 and a second transmission line 106 connected to the second active circuit 104.
- the first transmission line 105 and the second transmission line 106 are connected to an electronic unit 107 that performs diversity control.
- the first active circuit 103 includes a first variable matching circuit 109 to which a television signal received by the first film antenna 101 is input, a first amplifier 110 connected to the output side of the first variable matching circuit 109, and a first A third high-pass filter 111 connected to the output side of the amplifier 110 and connected to the first transmission line 105 is included. Further, the first active circuit 103 includes a third low-pass filter 112, a first regulator 113, and a first control signal determination circuit 114. The third low-pass filter 112 is connected to the first transmission line 105, and receives a signal in which a power supply voltage supplied via the first transmission line 105 and a control signal are superimposed. The first regulator 113 and the first control signal determination circuit 114 are connected to the output side of the third low-pass filter 112.
- the second active circuit 104 includes a second variable matching circuit 115 to which a television signal received by the second film antenna 102 is input, and a second amplifier 116 connected to the output side of the second variable matching circuit 115. And a fourth high-pass filter 117 connected to the output side of the second amplifier 116 and connected to the second transmission line 106.
- the second active circuit 104 includes a fourth low-pass filter 118, a second regulator 119, and a second control signal determination circuit 120.
- the fourth low-pass filter 118 is connected to the second transmission line 106 and receives a signal in which a power supply voltage supplied via the second transmission line 106 and a control signal are superimposed.
- the second regulator 119 and the second control signal determination circuit 120 are connected to the output side of the fourth low-pass filter 118.
- the electronic unit 107 includes a first high-pass filter 121 to which a television signal is input via the first transmission line 105, a first RF circuit 122 connected to the output side of the first high-pass filter 121, and the first transmission line 105. And a first low-pass filter 124 to which a signal in which a power supply voltage generated in the first power / control signal generation circuit 123 and a control signal are superimposed is input.
- the electronic unit 107 includes a second high-pass filter 125 to which a television signal is input via the second transmission line 106, a second RF circuit 126 connected to the output side of the second high-pass filter 125, and the second transmission line 106. And a second low-pass filter 128 to which a signal in which a power supply voltage generated by the second power supply / control signal generation circuit 127 and a control signal are superimposed is input.
- a demodulation circuit 129 is connected to the output sides of the first RF circuit 122 and the second RF circuit 126 to demodulate the television signal.
- FIG. 32 is a diagram illustrating characteristics of a signal in which a power supply voltage and a control signal are superimposed in a conventional diversity antenna device. A waveform of a signal in which a power supply voltage and a control signal generated in the first power supply / control signal generation circuit 123 and the second power supply / control signal generation circuit 127 are superimposed is shown.
- the horizontal axis represents time
- the vertical axis represents voltage value.
- the signal 130 in which the power supply voltage and the control signal are superimposed always has a voltage value larger than the minimum voltage value 131 that can be smoothed by the first regulator 113 and the second regulator 119.
- the signal 130 sets four voltage values of a first voltage value 132, a second voltage value 133, a third voltage value 134, and a fourth voltage value 135 at a voltage equal to or higher than the minimum voltage value 131, and between them.
- the voltage value is switched over time.
- the first power supply / control signal generation circuit 123 and the second power supply / control signal generation circuit 127 are used. Controls the first variable matching circuit 109 and the second variable matching circuit 115, respectively.
- the signal 130 generated in the first power / control signal generation circuit 123 passes through the first low-pass filter 124 and is supplied to the first transmission line 105.
- the signal 130 is a signal having a very low frequency as compared with the television signal, the signal 130 cannot pass through the first high-pass filter 121 through which the television signal passes and does not reach the first RF circuit.
- the signal 130 supplied to the first transmission line 105 reaches the third low-pass filter 112 via the first transmission line 105, then passes through the third low-pass filter 112, and the first regulator 113 and the first control signal determination To the circuit 114.
- the signal 130 cannot pass through the third high-pass filter 111 for the same reason as described above.
- the signal 130 is smoothed to a voltage value lower than the lowest voltage value 131 in FIG. 32 and supplied to the first amplifier 110 and the first control signal determination circuit 114 as a power supply voltage.
- the first control signal determination circuit 114 it is determined which voltage value level the signal 130 corresponds to among the first voltage value 132, the second voltage value 133, the third voltage value 134, and the fourth voltage value 135. Is done.
- a control signal is supplied from the first control signal determination circuit 114 to the first variable matching circuit so as to be in the state of the first variable matching circuit 109 assigned in advance to each voltage value level.
- the state of the first variable matching circuit is changed by the control signal so as to be in a state most suitable for the frequency band of the television signal to be received.
- the television signal received by the first film antenna 101 Since the television signal received by the first film antenna 101 has a very high frequency compared to the signal 130, most of the television signal is supplied to the first transmission line 105 without passing through the third low-pass filter 112. . Then, it passes through the first high-pass filter 121 and is supplied to the first RF circuit 122. In the first RF circuit, the television signal is amplified, noise-removed, frequency converted and quantized, and then supplied to the demodulating circuit 129 and demodulated. Similarly, a television signal received by the second film antenna 102 is also supplied to the demodulation circuit 129, and each television signal is demodulated by the demodulation circuit 129. After demodulation, the two television signals are combined at the maximum ratio to improve the reception characteristics.
- the power supply voltage and the control signal supplied to the first active circuit 103 and the second active circuit 104 are supplied to the first power supply / control signal generation circuit 123 and the second power supply / control signal generation circuit 127.
- the signal is superimposed as shown in FIG. For this reason, the potential width allowed for the control signal is limited to the region of the minimum voltage value 131 or more, and it is difficult to control the first active circuit 103 and the second active circuit 104 using a large potential width. .
- control signal since the control signal is superimposed on the power supply voltage as in the signal 130 shown in FIG. 32, it cannot be used as the power supply voltage in this state, and the first active circuit 103 and the second active circuit 104 The 1st regulator 113 and the 2nd regulator 119 which smooth a value are required. For this reason, it is difficult to reduce the size of the first active circuit 103 and the second active circuit 104.
- Patent Documents 1 and 2 are known.
- the antenna device of the present invention corresponds to an active circuit to which a reception signal is input from a first antenna and a second antenna, a first transmission line connected to an active circuit corresponding to the first antenna, and a second antenna.
- a second transmission line connected to the active circuit.
- the power of the active circuit is supplied via the first transmission line from the power supply circuit of the electronic unit to which the first transmission line and the second transmission line are connected.
- the active circuit is controlled by a control signal supplied from the control signal generation circuit of the electronic unit via the second transmission line.
- FIG. 1 is a block diagram of an antenna device according to the first embodiment.
- FIG. 2 is a diagram illustrating the power supply voltage characteristics of the antenna device according to the first embodiment.
- FIG. 3 is a diagram illustrating the characteristics of the control signal of the antenna device according to the first embodiment.
- FIG. 4 is a diagram illustrating characteristics of other control signals of the antenna device according to the first embodiment.
- FIG. 5 is a block diagram of another active circuit of the antenna device according to the first embodiment.
- FIG. 6 is a block diagram of an antenna apparatus according to the second embodiment.
- FIG. 7 is a block diagram of a control signal determination circuit of the antenna device according to the second embodiment.
- FIG. 8 is a block diagram of the first antenna unit according to the third embodiment.
- FIG. 9 is a block diagram of a third antenna unit according to the fourth embodiment.
- FIG. 10 is a block diagram of the second antenna unit according to the fifth embodiment.
- FIG. 11 is a diagram in which the second antenna unit according to the fifth embodiment is incorporated in an antenna module.
- FIG. 12 is a diagram illustrating the operation of the antenna element in the differential mode according to the fifth embodiment.
- FIG. 13 is a diagram illustrating an operation in the common mode of the antenna element according to the fifth embodiment.
- FIG. 14 is a block diagram of the first antenna unit according to the fifth embodiment.
- FIG. 15 is a block diagram of the third antenna unit according to the fifth embodiment.
- FIG. 16 is a diagram illustrating a design example in the differential mode of the second antenna unit according to the fifth embodiment.
- FIG. 17 is a diagram illustrating a design example in the common mode of the second antenna unit according to the fifth embodiment.
- FIG. 18 is a diagram illustrating pass characteristics of the antenna device according to the fifth embodiment in the differential mode.
- FIG. 19 is a diagram illustrating pass characteristics in the common mode of the antenna device according to the fifth embodiment.
- FIG. 20 is a diagram illustrating impedance characteristics at port number 1 of the antenna device according to the fifth embodiment.
- FIG. 21 is a diagram showing impedance characteristics at port number 2 of the antenna device according to the fifth embodiment.
- FIG. 22 is a diagram showing impedance characteristics at port number 3 of the antenna device according to the fifth embodiment.
- FIG. 23 is a diagram illustrating impedance characteristics at port number 4 of the antenna device according to the fifth embodiment.
- FIG. 24 is a diagram illustrating impedance characteristics at port number 5 of the antenna device according to the fifth embodiment.
- FIG. 25 is a diagram illustrating impedance characteristics at port number 6 of the antenna device according to the fifth embodiment.
- FIG. 26 is a diagram illustrating an example of an in-vehicle antenna according to the sixth embodiment.
- FIG. 27 shows a radiation pattern in the differential mode of the vehicle-mounted antenna according to the sixth embodiment.
- FIG. 28 shows a radiation pattern in the common mode of the vehicle-mounted antenna according to the sixth embodiment.
- FIG. 29 is a diagram showing an example of a vehicle-mounted antenna using two sets according to the sixth embodiment.
- FIG. 30 is a diagram showing an example of a conventional diversity antenna mounted on a vehicle.
- FIG. 31 is a circuit block diagram of a conventional diversity antenna device.
- FIG. 32 is a diagram illustrating characteristics of a signal in which a power supply voltage and a control signal are superimposed in a conventional diversity antenna device.
- FIG. 1 is a block diagram of an antenna device of the present invention.
- the communication device 3 includes an antenna module 1, an antenna device 2, and an electronic unit 9.
- the antenna device 2 includes an active circuit 4, a first transmission line 14 a and a second transmission line 14 b that connect the electronic unit 9 and the active circuit 4.
- the antenna module 1 has a first antenna 5 a and a second antenna 5 b, and received signals from the first antenna 5 a and the second antenna 5 b are supplied to the active circuit 4. Further, the first antenna 5a and the first transmission line 14a are connected correspondingly via the active circuit 4, and the second antenna 5b and the second transmission line 14b are connected correspondingly.
- the active circuit 4 includes a first variable matching circuit 6a to which a signal received by the first antenna 5a is input, a first amplifier 7a connected to the output side of the first variable matching circuit 6a, and a third high-pass filter 11a. And a third low-pass filter 13a.
- the third high pass filter 11a is connected to the output side of the first amplifier 7a and is connected to the first transmission line 14a.
- the third low-pass filter 13a is connected to the first transmission line 14a, and receives a power supply voltage supplied via the first transmission line 14a.
- the active circuit 4 includes a second variable matching circuit 6b to which a signal received by the second antenna 5b is input, a second amplifier 7b connected to the output side of the second variable matching circuit 6b, and a fourth high-pass filter. 11b, a fourth low-pass filter 13b, and a control signal determination circuit 8.
- the fourth high pass filter 11b is connected to the output side of the second amplifier 7b and is connected to the second transmission line 14b.
- the fourth low-pass filter 13b is connected to the second transmission line 14b and receives the first control signal supplied via the second transmission line 14b.
- the control signal determination circuit 8 is connected to the output side of the fourth low-pass filter 13b.
- the power supply voltage output via the third low-pass filter 13a is supplied to each active element of the active circuit 4 (for example, the first amplifier 7a, the second amplifier 7b, the control signal determination circuit 8 and the like).
- the electronic unit 9 includes a first high-pass filter 10a to which a signal received by the first antenna 5a is input via the first transmission line 14a, and a first RF circuit 15a connected to the output side of the first high-pass filter 10a. And a first low-pass filter 12a connected to the first transmission line 14a and to which the power supply voltage generated in the power supply circuit 16 is input.
- the electronic unit 9 includes a second high-pass filter 10b to which a signal received by the second antenna 5b is input via the second transmission line 14b, and a second RF circuit 15b connected to the output side of the second high-pass filter 10b. And a second low-pass filter 12b that is connected to the second transmission line 14b and receives the first control signal generated in the first control signal generation circuit 17a. Further, a demodulation circuit 18 is connected to the outputs of the first RF circuit 15a and the second RF circuit 15b.
- the communication device 3 includes an antenna module 1, an active circuit 4, a first transmission line 14a, a second transmission line 14b, and an electronic unit 9.
- the communication device 3 receives a first signal received by the first antenna 5a and output from the first RF circuit 15a, and a second signal received by the second antenna 5b and output from the second RF circuit 15b.
- 18 has a configuration of a diversity reception system for processing by an optimum method. As a specific processing method, for example, a maximum ratio combining method, a selection method, and the like can be considered.
- the power supply to the active circuit 4 is performed from the power supply circuit 16 via the first transmission line 14a.
- FIG. 2 is a graph showing the power supply voltage characteristics of the antenna device according to the first embodiment.
- the demodulating circuit 18 transmits a signal for urging the power supply to the power supply circuit 16
- the power supply circuit 16 After the demodulating circuit 18 transmits a signal for urging the power supply to the power supply circuit 16, the power supply circuit 16 generates a substantially DC voltage as shown in FIG. 2 and outputs it to the first low-pass filter 12a. Is done. Since the power supply voltage output to the first low-pass filter 12a is substantially a DC voltage, it passes through the first low-pass filter 12a.
- the cut-off frequency of the first low-pass filter 12a is set so that a sufficient amount of attenuation can be obtained at the frequency of the signal received by the antenna module 1, and the passage loss of the power supply voltage is minimized. ing. Thereby, the signal received by the first antenna 5a can be prevented from passing through the first low-pass filter 12a and being supplied to the power supply circuit 16. Also, most of the signal received by the first antenna 5a can be supplied to the first RF circuit 15a, and the reception characteristics of the communication device 3 can be improved.
- the power supply voltage that has passed through the first low-pass filter 12a passes through the first high-pass filter 10a and is hardly supplied to the first RF circuit 15a.
- the cut-off frequency of the first high-pass filter 10a is set so that the passage loss is as small as possible at the frequency of the signal received by the first antenna 5a, and the power supply voltage that is approximately a DC value does not pass. This is because it is set as follows. Thereby, it is possible to prevent unnecessary power from being supplied to the first RF circuit 15a, and to reduce current consumption.
- the power supply voltage that has passed through the first low-pass filter 12a is supplied to the third low-pass filter 13a via the first transmission line 14a.
- the cutoff frequencies of the third low-pass filter 13a and the third high-pass filter 11a are set by the same method as that for the first low-pass filter 12a and the first high-pass filter 10a. This prevents transmission loss caused by the signal received by the first antenna 5a passing through the third low-pass filter 13a and being supplied to other circuits. Further, a power supply loss caused by a part of the power supply voltage being supplied to the first amplifier 7a via the third high pass filter 11a is prevented.
- the power supply voltage supplied to the third low-pass filter 13a passes through the third low-pass filter 13a and is supplied to the first amplifier 7a, the second amplifier 7b, and the control signal determination circuit 8.
- the power supply voltage supplied from the power supply circuit 16 is different from the conventional antenna device shown in FIGS. 31 and 32, and the control signal is not superimposed on the power supply voltage as shown in FIG.
- the power supply voltage is generally a DC voltage.
- the active circuit 4 does not require a regulator unlike the conventional antenna device. Therefore, two regulators can be reduced with respect to the conventional antenna device, and a small antenna device can be realized. Further, since there is no need to mount a regulator, it is possible to improve production efficiency and reduce costs.
- the signal that prompts the power supply to the power supply circuit 16 is transmitted from the demodulation circuit 18; however, the present invention is not limited to this.
- a signal for prompting power supply may be transmitted from another processing circuit not shown in FIG.
- the power supply circuit 16 after the power supply circuit 16 receives a signal for prompting power supply from the demodulation circuit 18, the power supply voltage is continuously supplied to the active circuit 4.
- the power supply circuit 16 stops power supply from the demodulation circuit 18.
- An urging signal may be transmitted.
- a detection circuit capable of detecting a power value input to the first RF circuit 15a or the second RF circuit 15b may be disposed in the electronic unit 9.
- the power value or signal quality of an input signal an index value representing the quality of a received signal such as C / N (Carrier To Noise Ratio), BER (Bit Error Rate)
- the power supply circuit 16 may be configured to finely adjust the voltage value of the power supply voltage supplied to the active circuit 4. Thereby, it is possible to reduce variations in the characteristics of the antenna device due to variations in manufacturing of the active circuit 4 and the first transmission line 14a.
- the supply of the first control signal to the active circuit 4 is performed from the first control signal generation circuit 17a via the second transmission line 14b.
- FIG. 3 is a diagram illustrating the characteristics of the control signal of the antenna device according to the first embodiment. After a signal prompting the first control signal to be transmitted from the demodulating circuit 18 is transmitted to the first control signal generating circuit 17a, the first control signal as shown in FIG. Is generated and output to the second low-pass filter 12b.
- the first control signal generation circuit 17a generates a first control signal that changes with time by a potential of 9 steps of 0 V or more.
- the control signal is not superimposed on the power supply voltage. Therefore, the antenna device 2 of the present invention can generate a control signal using a wide potential width. Thereby, the receiving sensitivity when the control signal determination circuit 8 receives the control signal can be improved. Further, the antenna device 2 of the present invention can easily increase the number of steps of the control signal (the potential of 9 steps in FIG. 3), and the active circuit 4 can perform more advanced control.
- the cut-off frequency of the first low-pass filter 12a is set so that a sufficient amount of attenuation can be obtained at the frequency of the signal received by the antenna module 1, and is output to the second low-pass filter 12b in FIG.
- One control signal is set so as to pass substantially (passage loss is extremely small). For this reason, it is possible to prevent the signal received by the second antenna 5b from passing through the second low-pass filter 12b and being supplied to the first control signal generation circuit 17a. In addition, most of the signal received by the second antenna 5b can be supplied to the second RF circuit 15b. Thereby, the receiving characteristic of the communication apparatus 3 can be improved.
- the first control signal that has passed through the second low-pass filter 12b passes through the second high-pass filter 10b and is hardly supplied to the second RF circuit 15b.
- the cut-off frequency of the second high-pass filter 10b is set so that the passage loss is as small as possible at the frequency of the signal received by the second antenna 5b, and the first control signal does not pass. It is because it has been. This can prevent unnecessary power from being supplied to the second RF circuit 15b and reduce current consumption.
- the first control signal that has passed through the second low-pass filter 12b is supplied to the fourth low-pass filter 13b via the second transmission line 14b.
- the cutoff frequencies of the fourth low-pass filter 13b and the fourth high-pass filter 11b are set in the same manner as in the second low-pass filter 12b and the second high-pass filter 10b.
- the first control signal supplied to the fourth low-pass filter 13b passes through the fourth low-pass filter 13b, is supplied to the control signal determination circuit 8, and the first control signal is decoded.
- a control signal corresponding to the decoding result is transmitted from the control signal determination circuit 8 to the first variable matching circuit 6a and the second variable matching circuit 6b.
- the first variable matching circuit 6a and the second variable matching circuit 6b It is the optimal configuration for receiving. Thereby, it is possible to always realize the communication device 3 having good reception characteristics.
- the control signal transmitted to the first variable matching circuit 6a and the second variable matching circuit 6b is performed via the second transmission line 14b, which is a single signal line, as shown in FIG.
- the second control signal can be generated in a wide potential range, a large amount of information can be transmitted per unit time.
- a sine wave different from the frequency of the signal received by the antenna module 1 may be used.
- the first control signal can also be transmitted using the amplitude value and phase of the sine wave. Thereby, the frequency band which a 1st control signal occupies can be narrowed, and the degradation of the reception performance of the communication apparatus 3 by a 1st control signal can be avoided.
- FIG. 4 is a diagram illustrating characteristics of other control signals of the antenna device according to the first embodiment.
- the first control signal shown in FIG. 4 has a relatively smooth waveform as compared with the rectangular waveform of the first control signal shown in FIG. Thereby, compared with the first control signal shown in FIG. 3, the first control signal in FIG. 4 can occupy the frequency bandwidth occupied, and the deterioration of the reception characteristics of the communication device 3 can be avoided. .
- first transmission line 14a and the second transmission line 14b may be constituted by coaxial lines.
- the power supply voltage and the first control signal are supplied between the signal line of the coaxial line and the shield line.
- the active circuit 4 may not have the control signal determination circuit 8.
- the first control signal is directly input to the first variable matching circuit 6a and the second variable matching circuit 6b, and the first variable matching circuit 6a and the second variable matching circuit 6b are controlled by the first control signal itself. To do. Thereby, the control signal determination circuit 8 can be deleted, and a smaller antenna device can be realized.
- the first high-pass filter 10a, the second high-pass filter 10b, the third high-pass filter 11a, and the fourth high-pass filter 11b may have a circuit configuration in which a single element capacitor is inserted in series. Even with such a simple configuration, the passage of the power supply voltage and the control signal can be prevented, and the number of necessary parts can be reduced.
- the second high-pass filter 10b may have a larger number of filter stages than the first high-pass filter 10a. Since the frequency of the first control signal is generally higher than the power supply voltage, it is expected that the frequency of the signal received by the antenna module 1 will be approached. For this reason, the number of filter stages of the second high-pass filter 10b is increased to increase the attenuation in the frequency band occupied by the first control signal, thereby preventing the reception characteristics of the communication device 3 from deteriorating. Since the power value of the first control signal is expected to be larger than the signal received by the antenna module 1, this configuration prevents the first control signal from leaking into the second RF circuit 15b. Is very important in order not to deteriorate the reception performance of the communication device 3. For the same reason, the fourth high pass filter 11b may have a larger number of filter stages than the third high pass filter 11a.
- the first low-pass filter 12a, the second low-pass filter 12b, the third low-pass filter 13a, and the fourth low-pass filter 13b may have a circuit configuration in which one inductor is inserted in series. Even with such a configuration, it is possible to prevent the reception signal received by the antenna module 1 from passing and to reduce the number of necessary components.
- the antenna device 2 shown in FIG. 1 is dedicated to reception, it may be capable of transmitting and receiving. In this case, it is possible to prepare transmission amplifiers in parallel with the first amplifier 7a and the second amplifier 7b for reception, respectively, and use the amplifiers for transmission and reception switched by a filter or a switch. As a result, it is possible to realize a small communication device that can transmit and receive wireless signals.
- the first variable matching circuit 6a and the second variable matching circuit 6b connected immediately below the first antenna 5a and the second antenna 5b are controlled by the first control signal.
- the characteristics for example, P1 dB, NF characteristics, etc.
- a variable element for example, a varicap capacitor
- the element value of the variable element is controlled by the first control.
- a form that is changed by a signal can be considered.
- FIG. 5 is a block diagram of another active circuit of the antenna device according to the first embodiment.
- first variable matching circuit 6a and the second variable matching circuit 6b are eliminated. Instead, a first bypass switch 19a connected to the input side and output side of the first amplifier 7a and a second bypass switch 19b connected to the input side and output side of the second amplifier 7b are provided. Further, the first control signal that has passed through the fourth low-pass filter 13b without the control signal determination circuit 8 of FIG. 1 is directly input to the first bypass switch 19a and the second bypass switch 19b.
- the first bypass switch 19a and the second bypass switch 19b prevent a large received signal from being input to the first amplifier 7a and the second amplifier 7b, thereby preventing the first amplifier 7a and the second amplifier 7b from being distorted. To do. Furthermore, a large reception signal is input to the first RF circuit 15a and the second RF circuit 15b of the electronic unit 9, and the output of the first RF circuit 15a and the second RF circuit 15b is prevented from being distorted.
- a detection circuit for detecting the power value of the received signal is prepared in the active circuit 4 or the electronic unit 9, and the received power value is below a certain value (normal operation) ),
- the first bypass switch 19a and the second bypass switch 19b are turned off, and the received signal passes through the first amplifier 7a and the second amplifier 7b and is amplified.
- the power value of the signal derived by the detection circuit becomes equal to or higher than a certain value
- at least one of the first bypass switch 19a and the second bypass switch 19b is turned on by the first control signal.
- the received signal is bypassed and amplified by the first amplifier 7a or the second amplifier 7b, so that it is possible to avoid the reception signal from being distorted and the reception characteristics from being deteriorated.
- the power supply circuit 16 may stop the power supply to the first amplifier 7a and the second amplifier 7b. Thereby, the communication apparatus 3 with low power consumption and excellent reception performance can be realized.
- the “active circuit” refers to a circuit including at least one active element, for example, a filter including a passive element or an amplifier including an active element. Etc. refers to a circuit with a mixed load.
- the active circuit 4 there may be a plurality of elements to be controlled by the first control signal.
- the first and second variable matching circuits 6a and 6b in FIG. 1 and the first and second bypass switches 19a and 19b in FIG. 5 may exist together, and further, the first and second amplifiers 7a. 7b may be controlled simultaneously. Control combining these plural elements can be realized by the effect of the present invention in which the voltage width of the first control signal supplied to the active circuit 4 via the second transmission line 14b can be widely used.
- the first RF circuit 15 a and the second RF circuit 15 b are placed on the electronic unit 9 side, but these circuits may be included in the active circuit 4. Thereby, it becomes possible to lower the frequency of the received signal transmitted through the first and second transmission lines 14a and 14b, and transmission loss in the transmission line can be reduced.
- a control signal for controlling the first RF circuit 15a and the second RF circuit 15b is also included in the first control signal.
- the antenna module 1 is preferably one small module. This is because the supply of the power supply voltage to the active element (for example, the first amplifier 7a) directly below the first antenna 5a and the active element (for example, the second amplifier 7b) directly below the second antenna 5b is reduced. This is because the first transmission line 14a is used.
- the first antenna 5a and the second antenna 5b have a combination or structure of antennas that have a low correlation coefficient and high isolation between the antennas even though they are arranged close to each other. Something is desirable.
- one of the first antenna and the second antenna is a balanced antenna, and the other is an unbalanced antenna. A detailed description of the antenna structure will be described later.
- FIG. 6 is a block diagram of an antenna apparatus according to Embodiment 2 of the present invention.
- the same parts as those in the first embodiment shown in FIG. 1 are described with only the same reference numerals, and different configurations will be mainly described below.
- the antenna module 1 has a third antenna 5c in addition to the first antenna 5a and the second antenna 5b.
- the active circuit 4 includes a third variable matching circuit 6c connected to the third antenna 5c, a third amplifier 7c connected to the output side of the third variable matching circuit 6c, a sixth high-pass filter 11c, 6 low-pass filter 13c.
- One of the sixth high-pass filters 11c is connected to the third amplifier 7c, and the other is connected to the third transmission line 14c.
- One of the sixth low-pass filters 13 c is connected to the third transmission line 14 c, and the other is connected to the control signal determination circuit 8.
- the electronic unit 9 further includes a fifth high-pass filter 10c, a third RF circuit 15c, a fifth low-pass filter 12c, and a second control signal generation circuit 17b connected to the third transmission line 14c.
- One of the third RF circuits 15 c is connected to the fifth high-pass filter 10 c, and the other is connected to the demodulation circuit 18.
- One of the fifth low-pass filters 12c is connected to the third transmission line 14c, and the other is connected to the second control signal generation circuit 17b.
- the antenna device of the second embodiment shown in FIG. 6 constitutes a diversity reception type antenna device having three branches. Compared with the antenna device of the first embodiment, the major difference in operation of the antenna device 2 shown in FIG. 6 is the control method of the active circuit 4.
- the antenna device 2 includes a first control signal supplied from the first control signal generation circuit 17a via the second transmission line 14b, and a second control signal generation circuit 17b via the third transmission line 14c.
- Two control signals with the second control signal supplied can be used. Therefore, for example, the active circuit 4 can be highly controlled using a value derived based on the difference, sum, product, etc. of these two control signals as a control signal.
- the two lines of the second transmission line 14b and the third transmission line 14c are used like a feeder line, and the first control signal and the second control signal are in balance mode (differential mode). You may supply to a track. Thereby, the potentials of the two control signals can be expanded to the minus side. Moreover, if the 2nd transmission line 14b and the 3rd transmission line 14c are arrange
- FIG. 7 is a block diagram of a control signal determination circuit of the antenna device according to the second embodiment.
- the control signal determination circuit 8 includes at least a balun 20 to which the first control signal and the second control signal are input, and a control circuit 21 to which the output signal of the balun 20 is input.
- the control signal for controlling the active circuit 4 from the electronic unit 9 in FIG. 6 is supplied by a signal derived from the difference between the first control signal and the second control signal.
- the control signal is most efficiently converted to the control signal determination circuit 8 when the phases of the first control signal and the second control signal are reversed. Can be transmitted. This transmission state is called a balance mode (differential mode).
- the control signal transmitted between the first transmission line 14a and the second transmission line 14b in the balance mode is converted into an unbalanced signal having positive and negative potentials by the balun 20 and supplied to the control circuit 21.
- a control signal having a potential in the negative direction as well as the positive direction, and various controls of the active circuit 4 are possible.
- control signals having opposite phases are transmitted to the first transmission line 14a and the second transmission line 14b, when the first transmission line 14a and the second transmission line 14b are arranged close to each other, these transmission lines are transmitted. It is possible to suppress the emission of the control signal from.
- the control signal transmitted in the balance mode may be a sine wave, and the signal may be given in the frequency direction, phase direction, and amplitude direction.
- the frequency band occupied by the control signal can be narrowed, the communication device 3 having high reception characteristics can be realized, and the active circuit 4 can be controlled in various ways.
- FIG. 8 is a block diagram of the first antenna unit according to the third embodiment.
- the third embodiment shown in FIG. 8 is an implementation when the antenna module 1 constituting the first antenna 5a and the second antenna 5b of the first or second embodiment is realized by the first antenna unit 22. It is an example.
- the first antenna unit 22 of the third embodiment includes an antenna element 27 (in FIG. 8) having at least four terminals of a first terminal 23, a second terminal 24, a third terminal 25, and a fourth terminal 26. Does not specify the shape of the antenna element 27 and is described in a black box state).
- One of the first lines 28 is connected to the first terminal 23 of the antenna element 27, one of the second lines 29 is connected to the second terminal 24 of the antenna element 27, and the third line is connected to the third terminal 25 of the antenna element 27.
- 30 is connected, and one end of the fourth line 31 is connected to the fourth terminal 26 of the antenna element 27.
- the other of the first line 28 and the other of the second line 29 are connected at a first intersection 32, and the other of the third line 30 and the other of the fourth line 31 are connected at a second intersection 33.
- the first antenna unit 22 of the third embodiment includes a first matching circuit 34 and a first phase shifter 38 that are connected in the middle of the first line 28, and a second that is connected in the middle of the second line 29. A matching circuit 35 and a second phase shifter 39 are included.
- the first antenna unit 22 includes a third matching circuit 36 and a third phase shifter 40 which are connected in the middle of the third line 30, a fourth matching circuit 37 and a fourth matching circuit 37 which are connected in the middle of the fourth line 31. 4 phase shifter 41.
- the active circuit 4 of FIG. 1 is connected at the first intersection 32 and the second intersection 33.
- the first variable matching circuit 6a of FIG. 1 is connected to the first intersection 32, and the second variable matching circuit 6b of FIG.
- the phase difference between the phase of the signal that appears on the second intersection 33 side of the third line 30 and the phase of the signal that appears on the second intersection 33 side of the fourth line 31 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 32 side of the first line 28 and the phase of the signal appearing on the first intersection 32 side of the second line 29 is also It is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the fourth matching circuit 37, the first phase shifter 38, the second phase shifter 39, the third phase shifter 40, and the fourth phase shifter 41 are designed.
- a signal input from the first variable matching circuit 6a to the first intersection 32 does not substantially propagate from the second intersection 33 to the second variable matching circuit 6b side.
- the phase of the signal appearing on the first intersection 32 side of the first line 28 and the first intersection 32 side of the second line 29 are also shown. Since the phase difference from the phase of the appearing signal is approximately 180 ° ⁇ 360 ° * n (n is an integer equal to or greater than 0), the signal does not generally propagate from the first intersection 32 to the first variable matching circuit 6b side.
- the first RF circuit 15a and the second RF circuit 15b in FIG. 1 can exchange signals independently through the single antenna element 27. That is, the first RF circuit 15a and the second RF circuit 15b in FIG. 1 can exchange signals independently of each other without being restricted in terms of time and frequency. Thereby, a small antenna module with a low correlation coefficient between two antennas can be realized.
- the phase difference between the phase of the signal and the phase of the signal appearing on the first intersection 32 side of the second line 29 is also approximately 180 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0) ”
- the “substantially” range indicates a range where the phase difference between the two signals to be compared is 135 degrees ⁇ 360 degrees * n or more and 225 degrees ⁇ 360 degrees * n or less (n is an integer of 0 or more).
- the description of “approximately” for a predetermined phase (or phase difference) is a width of ⁇ 45 degrees to +45 degrees with respect to the predetermined phase (or phase difference). It means that it has. If the predetermined phase (or phase difference) in the present application is within the range of ⁇ 45 degrees to +45 degrees, the isolation between the first intersection point 32 and the second intersection point 33 can ensure a value of 10 dB or more. is there.
- the absolute value of the amplitude of the signal appearing on the second intersection point 33 side of the third line 30 and the absolute value of the amplitude of the signal appearing on the second intersection point 33 side of the fourth line 31 are shown.
- the line lengths of the first line 28, the second line 29, the third line 30, and the fourth line 31, the first matching circuit 34, the second matching circuit 35, and the third matching so that the values are substantially the same.
- the circuit 36, the fourth matching circuit 37, the first phase shifter 38, the second phase shifter 39, the third phase shifter 40, and the fourth phase shifter 41 may be designed.
- the absolute value of the amplitude of the signal appearing on the first intersection 32 side of the first line 28 and the signal appearing on the first intersection 32 side of the second line 29 are similar.
- the third matching circuit 36 and the fourth matching circuit 37, and the first phase shifter 38, the second phase shifter 39, the third phase shifter 40, and the fourth phase shifter 41 may be designed.
- the absolute value of the amplitude of the signal appearing on the second intersection 33 side of the third line 30 and the absolute value of the amplitude of the signal appearing on the second intersection 33 side of the fourth line 31 are substantially the same”.
- the absolute value of the amplitude of the signal appearing on the first intersection 32 side of the first line 28 and the absolute value of the amplitude of the signal appearing on the first intersection 32 side of the second line 29 are substantially the same.
- the “substantially” range in the description indicates a range in which the amplitude ratio of the two signals to be compared is 10 dB or less.
- the isolation between the first intersection 32 and the second intersection 33 ensures a value of 10 dB or more. This is because it can.
- the range of “substantially the same” is the amplitude of the two signals to be compared. It indicates a range where the ratio is 10 dB or less.
- amplitude means an absolute value having no positive or negative sign.
- the first matching circuit 34, the second matching circuit 35, the first phase shifter 38, and the second phase shifter 39 may be designed.
- the current level of the common mode signal between the first terminal 23 and the second terminal 24 when a common mode signal is input between the first terminal 23 and the second terminal 24, the current level of the common mode signal between the first terminal 23 and the second terminal 24.
- 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 23 and the second terminal 24, the phase of the signal appearing on the first intersection 32 side of the first line 28, and the second line Since the difference from the phase of the signal appearing on the first intersection 32 side of 29 is approximately 180 ⁇ 360 degrees * n (n is an integer of 0 or more), the current of the common mode signal at the first intersection 32 is The common mode signal does not propagate from the first intersection 32 to the first variable matching circuit 6a side.
- the current level of the differential mode signal between the first terminal 23 and the second terminal 24 when a differential mode signal is input between the first terminal 23 and the second terminal 24, the current level of the differential mode signal between the first terminal 23 and the second terminal 24.
- the phase difference 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 23 and the second terminal 24, the signal appearing on the first intersection 32 side of the first line 28. And the phase of the signal appearing on the first intersection 32 side of the second line 29 are approximately 0 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the currents of the differential mode signals are added together, and the differential mode signals generally propagate from the first intersection 32 to the first variable matching circuit 6a side.
- the phase of the signal appearing on the first intersection point 32 side of the first line 28, and the second line 29 from the first terminal 23 to the second intersection 33 in consideration of the condition that the difference from the phase of the signal appearing on the first intersection 32 side of 29 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 second terminal 24 to the second intersection 33 is zero. That is, the current of the common mode signal generated between the first terminal 23 and the second terminal 24 is added in phase at the second intersection point 33 and propagates from the second intersection point 33 toward the second variable matching circuit 6b. Is done.
- the current of the differential mode signal generated between the first terminal 23 and the second terminal 24 is added and reversed in the opposite phase at the second intersection point 33, and the second variable matching circuit starts from the second intersection point 33. It is not almost propagated to the 6b side.
- the differential mode signal generated between the first terminal 23 and the second terminal 24 is propagated only to the first variable matching circuit 6 a side and is generated between the first terminal 23 and the second terminal 24.
- the common mode signal is propagated only to the second variable matching circuit 6b side. That is, the first antenna unit 22 of the present embodiment can separately extract the signals of the two modes generated between the first terminal 23 and the second terminal 24 via the antenna element 27.
- the current of the common mode signal appearing at the first intersection 32 can be canceled more accurately, and the differential mode signal component of the common mode propagating from the first intersection 32 to the first variable matching circuit 6a side can be reduced.
- the ratio can be improved.
- the second line 33 is connected to the second intersection 33 side of the third line 30.
- the line lengths of the third line 30 and the fourth line 31 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 33 side of the fourth line 31 are substantially the same.
- the third matching circuit 36, the fourth matching circuit 37, the third phase shifter 40, and the fourth phase shifter 41 may be designed. As a result, the current of the differential mode signal appearing at the second intersection 33 can be canceled more accurately, and the ratio of the common mode signal component to the differential mode propagating from the second intersection 33 to the second variable matching circuit 6b side. Can be improved.
- the amount of phase change from the first terminal 23 to the first intersection 32 is approximately 90 ° ⁇ 360 ° * n (n is an integer equal to or greater than 0), and the phase change from the second terminal 24 to the first intersection 32.
- the first phase shifter 38 and the second phase shifter 39 may be designed.
- the amount of phase change from the first terminal 23 to the first intersection 32 is approximately 90 ° ⁇ 360 ° * n (n is And the amount of phase change from the second terminal 24 to the first intersection 32 is approximately ⁇ 90 degrees ⁇ 360 degrees * n (n is an integer greater than or equal to 0).
- the first intersection 32 is a virtually grounded location. Phase change amounts from the first intersection 32 virtually grounded to the first terminal 23 and the second terminal 24 are 90 degrees and ⁇ 90 degrees, respectively.
- the input impedance when viewing the one intersection 32 side is infinite.
- the common mode signal generated between the first terminal 23 and the second terminal 24 does not propagate to the first intersection 32 side, but propagates to the second intersection 33 side. Accordingly, the ratio of the common mode signal propagating to the second variable matching circuit 6b to the differential mode signal can be further improved, and the differential mode signal propagating to the first variable matching circuit 6a can be further improved. The ratio to can be further improved.
- the first intersection point 32 side of the first line 28 is obtained.
- the line lengths of the first line 28 and the second line 29 are set so that the absolute value of the amplitude of the signal appearing on the first line 28 and the absolute value of the amplitude of the signal appearing on the first intersection 32 side of the second line 29 are substantially the same.
- the first matching circuit 34, the second matching circuit 35, the first phase shifter 38, and the second phase shifter 39 may be designed.
- the current of the common mode signal appearing at the first intersection 32 can be canceled more accurately, and the differential mode signal component for the common mode of the signal propagating from the first intersection 32 to the first variable matching circuit 6a side.
- the ratio of can be improved.
- a diversity antenna capable of accurately separating a common mode signal and a differential mode signal generated in the antenna element 27 with a low correlation coefficient can be realized.
- phase change amount from the first terminal 23 to the second intersection point 33 is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more), and the phase change from the second terminal 24 to the second intersection point 33.
- the third phase shifter 40 and the fourth phase shifter 41 may be designed.
- the second intersection point 33 is virtually grounded. Since the phase change amounts from the virtually intersected second intersection 33 to the first terminal 23 and the second terminal 24 are both 90 degrees, the second intersection from the first terminal 23 and the second terminal 24, respectively.
- the input impedance when viewing the 33 side is infinite.
- the differential mode signal generated between the first terminal 23 and the second terminal 24 does not generally propagate to the second intersection 33 side, but propagates to the first intersection 33 side.
- the ratio of the differential mode signal propagating to the first variable matching circuit 6a to the common mode signal can be further improved, and the differential mode signal of the common mode signal propagating to the second variable matching circuit 6b can be further improved.
- the ratio to can be improved.
- the signal when a signal having a phase difference of 180 degrees and an equal absolute value is input to the first terminal 23 and the second terminal 24, the signal appears on the second intersection 33 side of the third line 30.
- the line lengths of the third line 30 and the fourth line 31 are set so that the absolute value of the signal amplitude and the absolute value of the amplitude of the signal appearing on the second intersection 33 side of the fourth line 31 are substantially the same.
- the third matching circuit 36, the fourth matching circuit 37, the third phase shifter 40, and the fourth phase shifter 41 may be designed.
- the current of the common mode signal appearing at the first intersection 32 can be canceled more accurately, and the ratio of the differential mode signal component to the common mode of the signal propagating from the first intersection 32 to the first variable matching circuit 6a side can be calculated. Can be improved.
- the amount of phase change from the third terminal 25 to the second intersection 33 is approximately + 90 ° ⁇ 180 ° * n (n is an integer of 0 or more), and the phase change from the fourth terminal 26 to the second intersection 33
- the third phase shifter 40 and the fourth phase shifter 41 may be designed.
- the differential mode signal when a differential mode signal is generated between the third terminal 25 and the fourth terminal 26, the amount of phase change from the third terminal 25 to the second intersection 33, and the second terminal 26 to the second terminal Since the phase change amount up to the intersection point 33 is the same amount, the differential mode signal is canceled at the second intersection point 33. That is, for the differential mode signal, the second intersection point 33 is virtually grounded. Since the amount of phase change from the virtually grounded second intersection 33 to the third terminal 25 and the fourth terminal 26 is both 90 degrees, the second intersection from the third terminal 25 and the fourth terminal 26, respectively. The input impedance when viewing the 33 side is infinite.
- the differential mode signal generated between the third terminal 25 and the fourth terminal 26 does not substantially propagate to the second intersection 33 side but propagates to the first intersection 32 side.
- the ratio of the differential mode signal propagating to the first variable matching circuit 6a to the common mode signal can be further improved, and the differential mode signal of the common mode signal propagating to the second variable matching circuit 6b can be improved.
- the ratio to can be further improved.
- the second intersection point of the third line 30 is obtained.
- the lines of the third line 30 and the fourth line 31 so that the absolute value of the amplitude of the signal appearing on the 33 side and the absolute value of the signal appearing on the second intersection 33 side of the fourth line 31 are substantially the same.
- the length, the third matching circuit 36, the fourth matching circuit 37, the third phase shifter 40, and the fourth phase shifter 41 may be designed.
- the first matching circuit 34, the second matching circuit 35, the third matching circuit 36, the fourth matching circuit 37, the first phase shifter 38, the second phase shifter 39, the third phase shifter 40, the fourth A configuration in which at least one of the phase shifters 41 is eliminated may be employed.
- the number of parts can be reduced and size reduction and weight reduction can be achieved.
- the first matching circuit 34, the second matching circuit 35, the third matching circuit 36, the fourth matching circuit 37, the first phase shifter 38, the second phase shifter 39, the third phase shifter 40, the fourth phase shifter 41, and the like Is basically designed by a circuit of a reactance element. However, it may be designed by a circuit including a resistance element, an amplifier circuit, and the like. As a result, high isolation characteristics between the first variable matching circuit 6a and the second variable matching circuit 6b can be realized, and transmission / reception characteristics of the communication device can be improved.
- FIG. 9 is a block diagram of a third antenna unit according to the fourth embodiment.
- the antenna module 1 constituting the first antenna 5a and the second antenna 5b of the first or second embodiment is realized by the third antenna unit 42 of FIG. Example of the case.
- symbol is described and it demonstrates below centering on a different structure.
- the third antenna unit 42 of the fourth embodiment includes an antenna element 27 having at least three terminals (in FIG. 9, the shape of the antenna element 27 is not specified and is described in a black box state). )have.
- One of the first lines 28 is connected to the first terminal 23 of the antenna element 27, one of the second lines 29 is connected to the second terminal 24 of the antenna element 27, and the third line is connected to the third terminal 25 of the antenna element 27.
- One of 30 is connected.
- the other of the first line 28 and the other of the second line 29 are connected to the first intersection 32, and the other of the third line 30 is connected to the second intersection 33.
- the phase difference between the phase of the signal appearing on the first intersection 32 side of the first line 28 and the phase of the signal appearing on the first intersection 32 side of the second line 29 is
- the line lengths of the first line 28, the second line 29, and the third line 30, the first matching circuit 34, and the second matching so as to be approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the circuit 35, the first phase shifter 38, and the second phase shifter 39 are designed. For this reason, for example, the signal transmitted from the first variable matching circuit 6a is canceled at the other side of the third line 30 and the third terminal 25, and therefore does not substantially propagate to the second variable matching circuit 6b side.
- the phase of the signal appearing on the first intersection point 32 side of the first line 28 and the phase of the signal appearing on the first intersection point 32 side of the second line 29 Is approximately 180 ° ⁇ 360 ° * n (n is an integer equal to or greater than 0), and therefore does not propagate from the first intersection 32 to the first variable matching circuit 6a side. Therefore, no signal is propagated between the first variable matching circuit 6a and the second variable matching circuit 6b, and isolation can be ensured between the first variable matching circuit 6a and the second variable matching circuit 6b.
- the first RF circuit 15a and the second RF circuit 15b in FIG. 1 can exchange signals independently of each other via the antenna element 27. That is, the first RF circuit 15a and the second RF circuit 15b can exchange signals independently of each other without being limited in time and frequency.
- the third antenna unit 42 of the fourth embodiment can reduce the number of lines connecting the third terminal 25 and the second variable matching circuit 6b, the number of matching circuits, and the number of phase shifters, A reduction in size and weight can be achieved.
- the absolute value of the amplitude of the signal appearing on the first intersection point 32 side of the first line 28 and the amplitude of the signal appearing on the first intersection point 32 side of the second line 29 are designed. Thereby, the advantageous effect that isolation between the 1st variable matching circuit 6a and the 2nd variable matching circuit 6b can be made still higher is acquired.
- the phase of the signal appearing on the first intersection 32 side of the first line 28 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the line length, the first matching circuit 34, the second matching circuit 35, the first phase shifter 38, and the second phase shifter 39 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 23 and the second terminal 24, the phase of the signal appearing on the first intersection 32 side of the first line 28 The difference from the phase of the signal appearing on the first intersection 32 side of the second line 29 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more). At the first intersection point 32, the current of the common mode signal is canceled, and the common mode signal is not propagated from the first intersection point 32 to the first variable matching circuit 6a side.
- the current level of the differential mode signal between the first terminal 23 and the second terminal 24 when a differential mode signal is input between the first terminal 23 and the second terminal 24, the current level of the differential mode signal between the first terminal 23 and the second terminal 24.
- the phase difference 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 23 and the second terminal 24, the phase of the signal appearing on the first intersection 32 side of the first line 28 And the phase of the signal appearing on the first intersection 32 side of the second line 29 is approximately 0 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the currents of the differential mode signals are added, and the differential mode signal propagates from the first intersection point 32 toward the first variable matching circuit 6a.
- the phase of the signal appearing on the first intersection 32 side of the first line 28 is designed so that the difference from the phase of the signal appearing on the first intersection 32 side of the second line 29 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 32 side of the first line 28 Considering the condition that the difference from the phase of the signal appearing on the first intersection 32 side of the second line 29 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the difference between the phase change amount from the first terminal 23 to the second intersection point 33 and the phase change amount from the second terminal 24 to the second intersection point 33 is zero. That is, the current of the common mode signal generated between the first terminal 23 and the second terminal 24 is added in phase at the third terminal 25, and is generally propagated to the second variable matching circuit 6b side.
- the current of the differential mode signal generated between the first terminal 23 and the second terminal 24 is added and canceled in the opposite phase at the third terminal 25 and is generally propagated to the second variable matching circuit 6b side.
- the differential mode signal generated between the first terminal 23 and the second terminal 24 is propagated only to the first variable matching circuit 6 a side and is generated between the first terminal 23 and the second terminal 24.
- the common mode signal is propagated only to the second variable matching circuit 6b side. That is, the third antenna unit 42 of the present embodiment can separately extract the signals of the two modes generated between the first terminal 23 and the second terminal 24.
- the amount of phase change from the first terminal 23 to the first intersection 32 is approximately 90 ° ⁇ 360 ° * n (n is an integer equal to or greater than 0), and the phase change from the second terminal 24 to the first intersection 32.
- the first phase shifter 38 and the second phase shifter 39 may be designed.
- the amount of phase change from the first terminal 23 to the first intersection 32 is approximately 90 ° ⁇ 360 ° * n (n is And an amount of phase change from the second terminal 23 to the first intersection 32 is approximately ⁇ 90 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0).
- the common mode signal is canceled. That is, for the common mode signal, the first intersection 32 is a virtually grounded location. Since the phase change amounts from the first intersection 32 virtually grounded to the first terminal 23 and the second terminal 24 are 90 degrees and ⁇ 90 degrees, respectively, from the first terminal 23 and the second terminal 24. When viewed from the first intersection 32 side, the input impedance is infinite.
- the common mode signal generated between the first terminal 23 and the second terminal 24 does not substantially propagate to the first intersection point 32 side but propagates to the second intersection point 33 side.
- the ratio of the common mode signal propagating to the second variable matching circuit 6b to the differential mode signal can be further improved, and further the common mode signal propagating to the first variable matching circuit 6a can be improved.
- the ratio to the signal can be improved.
- At least one of the first matching circuit 34, the second matching circuit 35, the first phase shifter 38, and the second phase shifter 39 may be eliminated.
- transmission loss in the first line 28 and the second line 29 can be reduced, and the number of necessary parts can be reduced, thereby reducing the size and weight.
- the first matching circuit 34, the second matching circuit 35, the first phase shifter 38, and the second phase shifter 39 are basically designed as reactance element circuits. You may design with the circuit contained. As a result, high isolation characteristics between the first variable matching circuit 6a and the second variable matching circuit 6b can be realized, and transmission / reception characteristics of the electronic device can be improved.
- FIG. 10 is a block diagram of the second antenna unit according to the fifth embodiment.
- the antenna module 1 constituting the first antenna 5a and the second antenna 5b of the first or second embodiment is realized by the second antenna unit 43 of FIG. Example of the case.
- symbol is described and it demonstrates below centering on a different structure.
- the second antenna unit 43 of the fifth embodiment includes an antenna element 27 having at least two terminals of the first terminal 23 and the second terminal 24 (in FIG. 10, the shape of the antenna element 27 is specified. (It is described in the state of a black box).
- One of the first lines 28 is connected to the first terminal 23 of the antenna element 27, one of the third lines 30 is connected to the first terminal 23, one of the second lines 29 is connected to the second terminal 24, and One end of the fourth line 31 is connected to the two terminals 24.
- the other of the first line 28 and the other of the second line 29 are connected to a first intersection 32, and the other of the third line 30 and the other of the fourth line 31 are connected to a second intersection 33.
- the phase difference between the phase of the signal appearing on the second intersection 33 side of the third line 30 and the phase of the signal appearing on the second intersection 33 side of the fourth line 31 is The line lengths of the first line 28, the second line 29, the third line 30, and the fourth line 31 and the first matching circuit so as to be approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- 34, the second matching circuit 35, the third matching circuit 36, and the fourth matching circuit 37, and the first phase shifter 38, the second phase shifter 39, the third phase shifter 40, and the fourth phase shifter 41 are designed. ing.
- the signal transmitted from the first variable matching circuit 6 a includes the phase of the signal appearing on the second intersection 33 side of the third line 30 and the signal appearing on the second intersection 33 side of the fourth line 31. Since the phase difference from the phase is approximately 180 ° ⁇ 360 ° * n (n is an integer equal to or greater than 0), the phase difference does not substantially propagate from the second intersection 33 to the second variable matching circuit 6b side.
- the phase of the signal appearing on the first intersection point 32 side of the first line 28 and the phase of the signal appearing on the first intersection point 32 side of the second line 29 Is approximately 180 ° ⁇ 360 ° * n (n is an integer equal to or larger than 0), and therefore, the phase difference does not substantially propagate from the first intersection 32 to the first variable matching circuit 6a side.
- the first variable matching circuit 6a and the second variable matching circuit 6b can exchange signals independently of each other via the antenna element 27. That is, the first RF circuit 15a and the second RF circuit 15b can exchange signals independently of each other without having to make a temporal or frequency selection.
- the second antenna unit 43 of the fifth embodiment can be connected to the antenna element 27 with only two connection terminals. The first antenna unit 22 in FIG. 8 and the second antenna unit in FIG. Compared with the antenna unit 42, the structure can be simplified.
- the absolute value of the amplitude of the signal appearing on the second intersection point 33 side of the third line 30 and the absolute value of the amplitude of the signal appearing on the second intersection point 33 side of the fourth line 31 are shown.
- the line lengths of the first line 28, the second line 29, the third line 30, and the fourth line 31, the first matching circuit 34, the second matching circuit 35, and the third matching so that the values are substantially the same.
- the circuit 36, the fourth matching circuit 37, the first phase shifter 38, the second phase shifter 39, the third phase shifter 40, and the fourth phase shifter 41 may be designed.
- the absolute value of the amplitude of the signal appearing on the first intersection 32 side of the first line 28 and the signal appearing on the first intersection 32 side of the second line 29 are similar.
- the third matching circuit 36 and the fourth matching circuit 37, and the first phase shifter 38, the second phase shifter 39, the third phase shifter 40, and the fourth phase shifter 41 may be designed. Thereby, the advantageous effect that isolation between the 1st variable matching circuit 6a and the 2nd variable matching circuit 6b can be made still higher is acquired.
- the phase of the signal appearing on the first intersection 32 side of the first line 28 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more).
- the line length, the first matching circuit 34, the second matching circuit 35, the first phase shifter 38, and the second phase shifter 39 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 23 and the second terminal 24, the phase of the signal appearing on the first intersection 32 side of the first line 28 The difference from the phase of the signal appearing on the first intersection 32 side of the second line 29 is approximately 180 ° ⁇ 360 ° * n (n is an integer of 0 or more). At the first intersection point 32, the current of the common mode signal is canceled, and the common mode signal is not propagated from the first intersection point 32 to the first variable matching circuit 6a side.
- the current level of the differential mode signal between the first terminal 23 and the second terminal 24 when a differential mode signal is input between the first terminal 23 and the second terminal 24, the current level of the differential mode signal between the first terminal 23 and the second terminal 24.
- the phase difference is ⁇ 180 degrees. Therefore, when signals having a phase difference of ⁇ 180 degrees and equal amplitude are input to the first terminal 23 and the second terminal 24, they appear on the first intersection 32 side of the first line 28.
- the difference between the phase of the signal and the phase of the signal appearing on the first intersection 32 side of the second line 29 is approximately 0 ° ⁇ 360 ° * n (n is an integer greater than or equal to 0).
- the currents of the differential mode signals are added, and the differential mode signal propagates from the first intersection point 32 toward the first variable matching circuit 6a.
- the current of the common mode signal generated between the first terminal 23 and the second terminal 24 is added in phase at the second intersection point 33 and propagates from the second intersection point 33 toward the second variable matching circuit 6b.
- the current of the differential mode signal generated between the first terminal 23 and the second terminal 24 is added in the opposite phase at the second intersection 33 and canceled out, and the second variable from the second intersection 33 becomes the second variable. It is not propagated to the matching circuit 6b side.
- the differential mode signal generated between the first terminal 23 and the second terminal 24 is propagated only to the first variable matching circuit 6 a side and is generated between the first terminal 23 and the second terminal 24.
- the common mode signal is propagated only to the second variable matching circuit 6b side. That is, the second antenna unit 43 of the present embodiment can separately extract the signals of the two modes generated between the first terminal 23 and the second terminal 24.
- the second matching circuit 35, the first phase shifter 38, and the second phase shifter 39 may be designed.
- the current of the common mode signal appearing at the first intersection 32 can be canceled more accurately, and the common mode signal of the differential mode signal propagating from the first intersection 32 to the first variable matching circuit 6a side can be corrected.
- the ratio to the signal can be improved.
- a signal having a phase difference of 180 degrees and an equal absolute value is input to the first terminal 23 and the second terminal 24, the signal appearing on the second intersection 33 side of the third line 30
- the line lengths of the third line 30 and the fourth line 31 and the third matching are set so that the absolute value of the amplitude and the absolute value of the amplitude of the signal appearing on the second intersection 33 side of the fourth line 31 are substantially the same.
- the circuit 36, the fourth matching circuit 37, the third phase shifter 40, and the fourth phase shifter 41 may be designed.
- the current of the differential mode signal appearing at the second intersection 33 can be canceled more accurately, and the ratio of the differential mode signal component to the common mode of the signal propagating from the second intersection 33 to the second variable matching circuit 6b side can be calculated. Can be improved. As a result, 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 27 and a differential mode signal and obtaining two signals having a low correlation coefficient.
- the amount of phase change from the first terminal 23 to the first intersection 32 is approximately 90 ° ⁇ 360 ° * n (n is an integer equal to or greater than 0), and the phase change from the second terminal 24 to the first intersection 32.
- the first phase shifter 38 and the second phase shifter 39 may be designed.
- the amount of phase change from the first terminal 23 to the first intersection 32 is approximately 90 ° ⁇ 360 ° * n (n is 0 or more)
- the phase change amount from the second terminal 33 to the first intersection point 32 is approximately ⁇ 90 degrees ⁇ 360 degrees * n (n is an integer of 0 or more).
- the mode signal will be canceled.
- the first intersection 32 is virtually grounded. Since the phase change amounts from the first intersection 32 virtually grounded to the first terminal 23 and the second terminal 24 are 90 degrees and ⁇ 90 degrees, respectively, from the first terminal 23 and the second terminal 24. When viewed from the first intersection 32 side, the input impedance is infinite. Therefore, the common mode signal generated between the first terminal 23 and the second terminal 24 does not generally propagate to the first intersection 32 side but propagates to the second intersection 33 side. .
- the ratio of the common mode signal propagating to the second variable matching circuit 6b to the differential mode signal can be further improved, and the differential mode signal propagating to the first variable matching circuit 6a can be further improved.
- the ratio to can be further improved.
- the signal appearing on the first intersection 32 side of the first line 28 when a signal having the same phase and the same absolute value of amplitude is input to the first terminal 23 and the second terminal 24, the signal appearing on the first intersection 32 side of the first line 28.
- the matching circuit 34, the second matching circuit 35, the first phase shifter 38, and the second phase shifter 39 may be designed.
- the current of the common mode signal appearing at the first intersection 32 can be canceled more accurately, and the ratio of the signal component to the common mode of the differential mode of the signal propagating from the first intersection 32 to the first variable matching circuit 6a side can be calculated. Can be improved. Thereby, it is possible to realize a diversity antenna that can accurately separate a common mode signal and a differential mode signal generated in the antenna element 27 and obtain two signals having a low correlation coefficient.
- the phase change amount from the first terminal 23 to the second intersection point 32 is approximately +90 degrees ⁇ 180 degrees * n (n is an integer of 0 or more) and the phase change amount from the second terminal 24 to the second intersection point 33
- the third phase shifter 38 and the fourth phase shifter 39 may be designed.
- the second intersection point 33 is virtually grounded. Since the phase change amounts from the virtually intersected second intersection 33 to the first terminal 23 and the second terminal 24 are both 90 degrees, the second intersection from the first terminal 23 and the second terminal 24, respectively.
- the input impedance when viewing the 33 side is infinite. Therefore, the differential mode signal generated between the first terminal 23 and the second terminal 24 does not substantially propagate to the second intersection 33 side but propagates to the first intersection 32 side.
- the ratio of the differential mode signal propagating to the first variable matching circuit 6b to the common mode signal can be further improved, and the differential mode signal of the common mode signal propagating to the second variable matching circuit 6b can be improved.
- the ratio to can be further improved.
- the second intersection point of the third line 30 is obtained.
- the lines of the third line 30 and the fourth line 31 so that the absolute value of the amplitude of the signal appearing on the 33 side and the absolute value of the signal appearing on the second intersection 33 side of the fourth line 31 are substantially the same.
- the length, the third matching circuit 36, the fourth matching circuit 37, the third phase shifter 40, and the fourth phase shifter 41 may be designed.
- the first matching circuit 34, the second matching circuit 35, the third matching circuit 36, the fourth matching circuit 37, the first phase shifter 38, the second phase shifter 39, the third phase shifter 40, A configuration in which at least one of the phase shifters 41 is eliminated may be employed.
- transmission loss in the first line 28, the second line 29, the third line 30, and the fourth line 31 can be reduced, the number of necessary parts can be reduced, and the size and weight can be reduced. it can.
- the first matching circuit 34, the second matching circuit 35, the third matching circuit 36, the fourth matching circuit 37, the first phase shifter 38, the second phase shifter 39, the third phase shifter 40, the fourth phase shifter 41, and the like. Is basically designed with a circuit of a reactance element, but may be designed with a circuit including a resistance element and an amplifier circuit. As a result, high isolation characteristics between the first variable matching circuit 6a and the second variable matching circuit 6b can be realized, and transmission / reception characteristics of the communication device 3 of FIG. 1 can be improved.
- FIG. 11 is a diagram in which the second antenna unit according to the fifth embodiment is incorporated in an antenna module.
- FIG. 10 only the same code
- the antenna element 27 is constituted by two pairs of antenna elements, an antenna element composed of a first element 44 and a third element 46, and an antenna element composed of a second element 45 and a fourth element 47. This shows a case where a dipole antenna is used.
- the first terminal 23 is provided at the end of the third element 46, and the second terminal 24 is provided at the end of the fourth element 47.
- the antenna element 27 has a line-symmetric shape with respect to an arbitrary line 49. Thereby, the input impedance of the antenna element 27 viewed from the first terminal 23 and the input impedance of the antenna element 27 viewed from the second terminal 24 are substantially the same, and the second antenna unit 43 can be easily designed.
- the first line 28 and the third line 30 connected to the first terminal 23, the second line 29 and the fourth line 31 connected to the second terminal 24, the first phase shifter 38, the second phase shifter. 39, the third phase shifter 40, the fourth phase shifter 41, and the active circuit 4 are disposed above and below the ground plate 48 built in the communication device 3.
- the first line 28 and the first phase shifter 38 are designed so that the amount of phase change from the first terminal 23 to the first intersection 32 is +90 degrees, and the phase from the second terminal 24 to the first intersection 32 is designed.
- the second line 29 and the second phase shifter 39 are designed so that the amount of change is ⁇ 90 degrees.
- the third line 30 and the third phase shifter 40 are designed so that the amount of phase change from the first terminal 23 to the first intersection 33 is +90 degrees, and from the second terminal 24 to the first intersection 33
- the fourth line 31 and the fourth phase shifter 41 are designed so that the amount of phase change is +90 degrees.
- the first element 44 and the second element 45 are disposed substantially parallel to the end of the ground plate 48, and the third element 46 and the fourth element 47 are disposed substantially perpendicular to the end of the ground plate 48. Has been.
- FIG. 12 is a diagram showing the operation of the antenna element in the differential mode according to the fifth embodiment.
- the first element 44 and the second element 45 generate currents having the same direction (shown by arrows in FIG. 12), and the third element 46 and the fourth element 47 have opposite directions. Is generated. Therefore, the phase difference between the signals generated at the first terminal 23 and the second terminal 24 is 180 degrees. When such a signal is input to the first terminal 23 and the second terminal 24, a signal appears at the first intersection 32 but no signal appears at the second intersection 33 according to the principle described above.
- the signal when a differential mode signal is generated in the antenna element 27, the signal is received by the first variable matching circuit 6a, but the signal is not received by the second variable matching circuit 6b.
- a signal is input from the first variable matching circuit 6 a to the antenna device 1, this signal is not propagated to the second variable matching circuit 6 b and most of the signal is supplied to the antenna element 27.
- the supplied signal generates a differential mode current in the antenna element 27 (see FIG. 5), and is radiated into the air as an electromagnetic wave.
- the current vector on the antenna element 27 contributing to radiation is mainly the current vector generated in the first element 44 and the second element 45, and the current vector generated in the third element 46 and the fourth element 47 is as follows.
- the radiation pattern when the differential mode occurs in the antenna element 27 is the radiation pattern 50 as shown by the dotted line in FIG. Therefore, when an electromagnetic wave mainly coming from the vertical direction is received mainly with respect to the first element 44 and the second element 45, a differential mode is generated on the antenna element 27, and the first variable matching circuit is generated. The signal is extracted only from 6a.
- FIG. 13 is a diagram showing an operation in the common mode of the antenna element according to the fifth embodiment.
- the first element 44 and the second element 45 generate currents having opposite directions (shown by arrows in FIG. 13), and the third element 46 and the fourth element 47 have the same orientation. Current is generated. Therefore, the phase difference between the signals generated at the first terminal 23 and the second terminal 24 is substantially 0 degree.
- a signal appears at the first intersection point 32 according to the principle described above, but no signal appears at the second intersection point 33. That is, when a common mode signal is generated in the antenna element 27, the signal is received by the second variable matching circuit 6b, but the signal is not received by the first variable matching circuit 6a.
- this signal is not propagated to the first variable matching circuit 6 a, and most of the signal is supplied to the antenna element 27.
- the supplied signal generates a common mode current in the antenna element 27 and is radiated into the air as an electromagnetic wave as shown in FIG.
- the current vector on the antenna element 27 contributing to radiation is mainly the current vector generated on the third element 46 and the fourth element 47 and the current vector 52 on the ground plate 48 generated in conjunction therewith.
- the direction of the current vector is opposite, so that it does not greatly contribute to radiation. Therefore, the radiation pattern when the common mode is generated in the antenna element 27 is the radiation pattern 51 as shown by the dotted line in FIG. Therefore, when an electromagnetic wave arriving mainly from the vertical direction with respect to the third element 46 and the fourth element 47 is received, a common mode is generated on the antenna element 27 and only from the second variable matching circuit 6b. The signal is taken out.
- the antenna module 1 can be reduced in size and weight, and the active circuit 4 can be miniaturized and integrated, so that the power supply and the first control signal can be easily supplied.
- the ground plate 48 may also have a shape that is line symmetric with respect to an arbitrary line 49, as with the antenna element 27. This facilitates the design of the directional diversity antenna.
- the above description regarding the second antenna unit 43 applies similarly to the case of the first antenna unit 22 having four terminals in FIG. 8 and the case of the third antenna unit 42 having three terminals in FIG.
- FIG. 14 is a block diagram of the first antenna unit according to the fifth embodiment.
- the antenna apparatus which has four terminals which have a line symmetrical shape on the basis of the arbitrary lines 49 is shown.
- the first straight line is formed at the midpoint (not shown) between the first terminal 23 and the second terminal 24 on the first straight line (not shown) connecting the first terminal 23 and the second terminal 24.
- the antenna element 27 has a substantially line symmetrical shape with respect to the vertical line 49.
- the antenna element 27 has a substantially line-symmetric shape with respect to the line 49. By adopting such a shape as the antenna element 27, it becomes easy to design a directional diversity antenna.
- FIG. 15 is a block diagram of the third antenna unit according to the fifth embodiment.
- An antenna device having three terminals having a line-symmetric shape with respect to an arbitrary line 49 is shown.
- the first straight line (not shown) connecting the first terminal 23 and the second terminal 24, the first straight line
- the antenna element 27 has a substantially line symmetrical shape with respect to the vertical line 49.
- the third terminal 25 substantially exists on the line 49.
- an antenna element (dipole antenna) having a symmetric structure is used.
- the antenna element is not limited to an antenna element having a symmetric structure. If the antenna element has at least two connection terminals, an asymmetric structure is used. The antenna element may be used.
- the antenna device of the present invention is used, even when the antenna element 27 having an asymmetric structure is used, the two modes of the common mode and the differential mode that are generated in the antenna element 27 can be independently received and transmitted. Can 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 for housing the antenna module 1.
- the antenna element composed of the first element 44 and the third element 46 having an input impedance of 50 ⁇ viewed from the first terminal 23 and the input impedance viewed from the second terminal 24 of 50 ⁇ .
- An example in which the second antenna unit 43 is designed at a frequency of 620 MHz by using an antenna element composed of a second element 45 and a fourth element 47 is shown.
- FIG. 16 is a diagram illustrating a design example in the differential mode of the second antenna unit according to the fifth embodiment.
- FIG. 17 is a diagram illustrating a design example in the common mode of the second antenna unit according to the fifth embodiment.
- the antenna element 27 is operating in the common mode. Since the antenna element composed of the first element 44 and the third element 46 and the antenna element composed of the second element 45 and the fourth element 47 are connected in parallel, the first terminal 23 and the second terminal 24, the input impedance of the antenna element 27 is 25 ⁇ .
- the input impedance of the antenna element 27 (port number 3) in FIG. 16 is 100 ⁇
- the input impedance of the antenna element 27 (port number 6) in FIG. 17 is 25 ⁇ .
- the first load circuit 53 (port number 1) and the second load circuit 54 (port number 2) in FIG. 16 and the first load circuit 53 in FIG. (Port number 4) and the second load circuit 54 (port number 5) were designed with their input impedance set to 50 ⁇ .
- the first load circuit 53 represents a load when the active circuit 4 and later are viewed from the input port 55 connected to the first intersection 32 in the active circuit 4 of FIG.
- the second load circuit 54 represents a load when the active circuit 4 and later are viewed from the input port 56 connected to the second intersection 33 in the active circuit 4 of FIG.
- the first phase shifter 38, the second phase shifter 39, the third phase shifter 40, and the fourth phase shifter 41 are each realized by three reactance elements.
- FIG. 18 is a diagram illustrating the pass characteristics of the antenna device according to the fifth embodiment in the differential mode.
- 18 shows the antenna element 27 (port number 3), the first load circuit 53 (port number 1), and the second load circuit 54 (port number 2) when the antenna element 27 shown in FIG. 16 operates in the differential mode. It shows the passage characteristic between and.
- S (3, 1) indicates a passing characteristic from the first load circuit 53 (port number 1) to the antenna element 27 (port number 3).
- the passing characteristic S (3, 1) from the first load circuit 53 (port number 1) to the antenna element 27 (port number 3) is almost 0 dB at a frequency of 620 MHz. .
- the pass characteristic S (3, 2) from the second load circuit 54 (port number 2) to the antenna element 27 (port number 3) is ⁇ 30 dB or less at a frequency of 620 MHz, and high isolation can be obtained.
- the passing characteristic S (2, 1) from the first load circuit 53 (port number 1) to the second load circuit 54 (port number 2) is ⁇ 30 dB or less at a frequency of 620 MHz, and high isolation can be obtained.
- FIG. 19 is a diagram showing pass characteristics in the common mode of the antenna device according to the fifth embodiment.
- FIG. 19 shows the antenna element 27 (port number 6), the first load circuit 53 (port number 4), and the second load circuit 54 (port number 5) when the antenna element 27 shown in FIG. 17 operates in the common mode. It shows the passage characteristic between and.
- S (6, 4) indicates a passing characteristic from the first load circuit 53 (port number 4) to the antenna element 27 (port number 6). From FIG. 19, it can be seen that the pass characteristic S (6, 5) from the second load circuit 54 (port number 5) to the antenna element 27 (port number 6) is almost 0 dB at a frequency of 620 MHz, and is in a conductive state. .
- the pass characteristic S (6, 4) from the first load circuit 53 (port number 4) to the antenna element 27 (port number 6) is ⁇ 30 dB or less at a frequency of 620 MHz, and high isolation can be obtained.
- the passing characteristic S (5, 4) from the first load circuit 53 (port number 4) to the second load circuit 54 (port number 5) is ⁇ 30 dB or less at a frequency of 620 MHz, and high isolation can be obtained.
- FIGS. 20 to 25 show the impedance characteristics of the ports of port numbers 1 to 6.
- FIG. FIG. 20 is a diagram illustrating impedance characteristics at port number 1 of the antenna device according to the fifth embodiment.
- FIG. 21 shows the port number 2
- FIG. 22 shows the port number 3
- FIG. 23 shows the port number 4
- FIG. 24 shows the port number 5, and
- FIG. 21 shows the port number 2
- FIG. 22 shows the port number 3
- FIG. 23 shows the port number 4
- FIG. 24 shows the port number 5
- S (1,1) indicates an input impedance characteristic when the second antenna unit 43 is viewed from the first intersection 32 in FIG.
- the characteristic impedances of the first line 28, the second line 29, the third line 30, and the fourth line 31 are all Zo.
- the input impedance of the antenna element 27 viewed from the first terminal 23 and the input impedance of the antenna element 27 viewed from the second terminal 24 may both be designed to be approximately Zo / 2.
- impedance matching between the antenna element 27 and the first load circuit 53 or the second load circuit 54 can be easily achieved, and reflection loss can be reduced.
- FIGS. 16 and 17 satisfy the above-described impedance relationship, and as a result, good electrical characteristics are realized as shown in FIGS.
- the first line 28 which is one line, one first matching circuit 34, 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 same applies to between the second terminal 24 and the first intersection point 32, between the third terminal 25 and the second intersection point 33, and between the fourth terminal 26 and the second intersection point 33.
- the 1st track, the 2nd track, the 3rd track, and the 4th track include what comprises a plurality of tracks.
- the first matching circuit, the second matching circuit, the third matching circuit, and the fourth matching circuit include those configured by a plurality of matching circuits.
- the first phaser, the second phaser, The third phase shifter and the fourth phase shifter include those composed of a plurality of phase shifters.
- FIG. 26 is a diagram illustrating an example of an in-vehicle antenna according to the sixth embodiment.
- FIG. 26 is a schematic diagram showing an example in which the antenna device shown in Embodiment 5 is used as an in-vehicle antenna that receives television broadcasts and radio broadcasts, and the windshield 57 is viewed from the vehicle interior It becomes the figure of.
- the first film antenna 58 in which the antenna element 27 shown in Embodiment 5 is formed on a transparent resin film is in contact with the upper region of the windshield 57 (for example, the top plate 59 of the car and the windshield 57 are in contact) It is affixed to the vehicle interior side in an area within 10 cm from the side.
- a first circuit 60 connected to the first film antenna 58 is disposed above the first film antenna 58 (antenna element 27) in FIG.
- the first circuit 60 includes a circuit (a first matching circuit 34, a first phase circuit 38, and the like) arranged immediately below the antenna element 27 in the second antenna unit 43, the active element 4 in FIG. It is a circuit having
- the first circuit 60 and the electronic unit 9 are connected by a first transmission line 14a and a second transmission line 14b of about 5 m.
- FIGS. 27 and 28 illustrate the embodiment shown in FIG. 26 from above the vehicle.
- FIG. 27 shows a radiation pattern in the differential mode of the vehicle-mounted antenna according to the sixth embodiment.
- FIG. 27 shows an antenna device when a differential mode signal is excited at the first terminal 23 (see FIG. 12) and the second terminal 24 (see FIG. 12) of the first film antenna 58 (antenna element 27).
- a radiation pattern 61 is shown.
- the radiation pattern 61 is radiated according to the principle described with reference to FIG. This is a radiation pattern when a signal is transmitted and received from the second transmission line 14b.
- the top plate 59 serves as a reflector, the directivity gain in the front direction of the vehicle is larger than the directivity gain in the rear direction of the vehicle. Thereby, reception of the television broadcast wave which arrives at the 1st film antenna 58 after being reflected and scattered in a vehicle interior can be suppressed. Reflected / scattered waves in the passenger compartment have large amplitude and phase fluctuations per unit time. Therefore, when the received television broadcast is a digital broadcast, an error is likely to occur during demodulation. Therefore, the antenna device 2 shown in Embodiment 6 can suppress the reception of reflected / scattered waves from the passenger compartment, and can improve the reception characteristics.
- FIG. 28 shows a radiation pattern in the common mode of the vehicle-mounted antenna according to the sixth embodiment.
- FIG. 28 shows the antenna device when a common mode signal is excited at the first terminal 23 (see FIG. 12) and the second terminal 24 (see FIG. 12) of the first film antenna 58 (antenna element 27).
- a radiation pattern 62 is shown.
- the radiation pattern 62 is radiated according to the principle described with reference to FIG. This is a radiation pattern when a signal is transmitted and received from the first transmission line 14a.
- the maximum value direction of the radiation pattern 62 is slightly inclined toward the front of the vehicle.
- radiation is caused by a radiation pattern 61 when a signal is exchanged via the first transmission line 14a and a radiation pattern 62 when a signal is exchanged via the second transmission line 14b. It is possible to make the pattern peak directions substantially orthogonal, and it is possible to realize the antenna module 1 having a small correlation coefficient while being small.
- the antenna device 2 since power is supplied to active elements such as the first amplifier 7a and the second amplifier 7b via the first transmission line 14a, the antenna device 2 is small and has a low correlation coefficient. Although necessary, the antenna element 27 of the present invention satisfies this condition and can be said to be an optimal antenna element.
- the second antenna unit 43 shown in the fifth embodiment has been described.
- the present invention is not limited to this, and the same effect can be obtained by using the antenna device shown in the first to fourth embodiments. Is obtained.
- One antenna unit may be used (hereinafter, the antenna unit used in place of the first antenna 5a in FIG. 1 is referred to as antenna unit A).
- antenna unit A the antenna unit used in place of the first antenna 5a in FIG. 1
- antenna unit B any one of the first antenna unit 22 in FIG. 8, the second antenna unit 43 in FIG. 10, and the third antenna unit 42 in FIG. 9 may be used.
- the antenna unit used in place of the second antenna 5b in FIG. 1 is referred to as an antenna unit B).
- the active circuit 4 includes a first switch (not shown) that switches the counterpart connected to the first transmission line 14a between the first intersection 32 and the second intersection 33 of the antenna unit A. And a second switch (not shown) for switching the counterpart connected to the second transmission line 14b between the first intersection 32 and the second intersection 33 of the antenna unit B.
- first switch (not shown) and the second switch (not shown) may be supplied with power from the power supply circuit 16 of FIG. 1 via the first transmission line 14a.
- the first switch (not shown) and the second switch (not shown) are based on the received power value and the signal quality value of the received signal (corresponding to C / N characteristics and BER characteristics). It is controlled by the first control signal supplied from the first control signal generation circuit 17a via the second transmission line 14b.
- the first control signal supplied from the first control signal generation circuit 17a via the second transmission line 14b has a plurality of voltage values divided into different levels, and the plurality of voltage values A first switch (not shown) and a second switch (not shown) may be controlled independently.
- the first control signal is supplied by only one line of the second transmission line 14b, so that a first switch (not shown), which is two elements to be controlled, and a second Although it is expected that it is difficult to control the switches (not shown) simultaneously and independently, the antenna device 2 of the present invention can use a wide potential width for the first control signal. Independently, a first switch (not shown) and a second switch (not shown) can be controlled.
- FIG. 29 is a diagram showing an example of an in-vehicle antenna using two sets of antenna devices according to the sixth embodiment.
- FIG. 29 shows an embodiment in which an on-vehicle television reception system is constructed using two sets of the above-described 4-branch diversity antenna devices (a total of 8 branch diversity reception systems).
- a second film antenna 63 in which the antenna unit A and the antenna unit B are formed on a transparent resin film and a second film antenna 63 in which the antenna unit A and the antenna unit B are formed on a transparent resin film.
- a three-film antenna 64 is attached to the vehicle interior side of the upper region of the windshield 57 (for example, the region within 10 cm from the side where the top plate 59 of the vehicle and the windshield 57 are in contact).
- the connected second transmission line 14 b is connected to the electronic unit 9.
- the fourth transmission line 14d connected to the electronic unit 9 is connected to the electronic unit 9.
- an 8-branch diversity reception system can be constructed, and the communication device 3 with high reception characteristics can be easily realized.
- connection is described. This means that the antenna is electrically connected.
- the connection of the antenna such as solder connection, electrostatic connection, electromagnetic connection, etc. Any connection method that transmits signals may be used.
- the present invention has been described mainly with the example of the diversity reception system, but the application of the present invention is not limited to this.
- it can be used as an antenna device for a system that receives two or more systems (for example, a system that receives a TV broadcast with a first antenna and a mobile phone signal with a second antenna), and a MIMO transmission / reception system. It is.
- the antenna device of the present invention does not require a regulator in an active circuit, a small diversity antenna device can be realized and can be used for a small communication terminal.
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Abstract
Description
以下、本発明の実施の形態1について、図1を用いて説明する。図1は、本発明のアンテナ装置のブロック図である。
以下、本発明の実施の形態2について、図6、7を用いて説明する。図6は、本発明の実施の形態2に関するアンテナ装置のブロック図である。図1において示した実施の形態1と同様の部分については、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、本発明の実施の形態3について、図8を用いて説明する。図8は実施の形態3に関する第1アンテナユニットのブロック図である。図8に示した実施の形態3は、実施の形態1又は実施の形態2の第1アンテナ5aと第2アンテナ5bとを構成するアンテナモジュール1を、第1アンテナユニット22により実現した場合の実施例である。
以下に、本発明の実施の形態4について、図9を用いて説明する。図9は実施の形態4に関する第3アンテナユニットのブロック図である。図9に示した実施の形態4は、実施の形態1又は実施の形態2の第1アンテナ5aと第2アンテナ5bとを構成するアンテナモジュール1を、図9の第3アンテナユニット42により実現した場合の実施例である。尚、実施の形態3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。
以下に、本発明の実施の形態5について、図10を用いて説明する。図10は実施の形態5に関する第2アンテナユニットのブロック図である。図10に示した実施の形態5は、実施の形態1又は実施の形態2の第1アンテナ5aと第2アンテナ5bとを構成するアンテナモジュール1を、図10の第2アンテナユニット43により実現した場合の実施例である。尚、実施の形態3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。
以下に、本発明の実施の形態6について、図26~29を用いて説明する。図26は本実施の形態6に関する車載用アンテナの実施例を示す図である。図26は、例えば実施の形態5に示したアンテナ装置を、テレビ放送やラジオ放送を受信する車載用アンテナに用いた一実施例を示す概略図であり、車室内からフロントガラス57を見た場合の図となっている。
2 アンテナ装置
3 通信装置
4 能動回路
5a 第1アンテナ
5b 第2アンテナ
6a 第1可変整合回路
6b 第2可変整合回路
7a 第1増幅器
7b 第2増幅器
8 制御信号判定回路
9 電子ユニット
10a 第1ハイパスフィルタ
10b 第2ハイパスフィルタ
11a 第3ハイパスフィルタ
11b 第4ハイパスフィルタ
12a 第1ローパスフィルタ
12b 第2ローパスフィルタ
13a 第3ローパスフィルタ
13b 第4ローパスフィルタ
14a 第1伝送線路
14b 第2伝送線路
15a 第1RF回路
15b 第2RF回路
16 電源供給回路
17a 第1制御信号発生回路
17b 第2制御信号発生回路
18 復調回路
Claims (12)
- 第1アンテナと第2アンテナとから受信信号が入力される能動回路と、
前記第1アンテナに対応して接続された第1伝送線路と、
前記第2アンテナに対応して接続された第2伝送線路とを備えたアンテナ装置であって、
前記アンテナ装置に電子ユニットが接続され、
前記電子ユニットの電源供給回路から前記第1伝送線路を介して前記能動回路に電源が供給され、
前記電子ユニットの第1制御信号発生回路から前記第2伝送線路を介して前記能動回路に第1制御信号が供給され、前記能動回路が制御される
アンテナ装置。 - 前記第1アンテナと前記第2アンテナのうち、一方はバランス型アンテナであり、他方はアンバランス型アンテナである
請求項1に記載のアンテナ装置。 - 前記第1伝送線路に接続された第1ハイパスフィルタの前記第1伝送線路側に前記電源供給回路を接続し、
前記第2伝送線路に接続された第2ハイパスフィルタの前記第2伝送線路側に前記第1制御信号発生回路を接続し、
前記第2ハイパスフィルタの段数は、前記第1ハイパスフィルタの段数よりも多い
請求項1に記載のアンテナ装置。 - 第1端子と、第2端子と、第3端子と、第4端子とを有するアンテナ素子と、
前記第1端子に一方が接続された第1線路と、
前記第2端子に一方が接続された第2線路と、
前記第3端子に一方が接続された第3線路と、
前記第4端子に一方が接続された第4線路とを備え、
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概ね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位相差が概ね180度となり、
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概ね180度となり、
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概ね+90度±180度*n(nは0以上の整数)であり、
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概ね+90度±180度*n(nは0以上の整数)であることを特徴とするアンテナユニットにより、前記第1アンテナと前記第2アンテナとが構成されており、
前記アンテナユニットの前記第1交点と前記第2交点の内、一方の交点が前記第1伝送線路と対応して接続されており、他方の交点が前記第2伝送線路と対応して接続されている
請求項1に記載のアンテナ装置。 - 第1端子と、第2端子とを有するアンテナ素子と、
前記第1端子に一方が接続された第1線路と、
前記第1端子に一方が接続された第3線路と、
前記第2端子に一方が接続された第2線路と、
前記第2端子に一方が接続された第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概ね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位相差が概ね180度となり、
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、
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概ね180度となると共に、
前記第1端子から前記第2交点までの位相変化量が概ね+90度±180度*n(nは0以上の整数)であり、
前記第2端子から前記第2交点までの位相変化量が概ね+90度±180度*n(nは0以上の整数)であることを特徴とするアンテナユニットにより、前記第1アンテナと前記第2アンテナとが構成されており、
前記アンテナユニットの前記第1交点と前記第2交点の内、一方の交点が前記第1伝送線路と対応して接続されており、他方の交点が前記第2伝送線路と対応して接続されている
請求項1に記載のアンテナ装置。 - 第1端子と、第2端子と、第3端子とを有するアンテナ素子と、
前記第1端子に一方が接続された第1線路と、
前記第2端子に一方が接続された第2線路と、
前記第3端子に一方が接続された第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線路の他方は第2交点に接続され、
前記第2交点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概ね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位相差が概ね180度となることを特徴とするアンテナユニットにより、前記第1アンテナと前記第2アンテナとが構成されており、
前記アンテナユニットの前記第1交点と前記第2交点の内、一方の交点が前記第1伝送線路と対応して接続されており、他方の交点が前記第2伝送線路と対応して接続されている
請求項1に記載のアンテナ装置。 - 前記第1アンテナは、請求項4記載のアンテナユニット、請求項5記載のアンテナユニット、請求項6記載のアンテナユニットからいずれか1つを選択され、
前記第2アンテナは、前記請求項4記載のアンテナユニット、前記請求項5記載のアンテナユニット、前記請求項6記載のアンテナユニットからいずれか1つを選択され、
前記能動回路は、
前記第1伝送線路に対応して前記第1アンテナの第1交点と第2交点とを切り替え接続する第1スイッチと、
前記第2伝送線路に対応して前記第2アンテナの第1交点と第2交点とを切り替え接続する第2スイッチとを備え、
前記第1スイッチと前記第2スイッチとは、前記第1制御信号発生回路から前記第2伝送線路を介して供給される前記第1制御信号により制御される
請求項1記載のアンテナ装置。 - 前記第1制御信号発生回路から前記第2伝送線路を介して供給される前記第1制御信号は異なるレベルに区分された複数の電圧値を有しており、前記複数の電圧値により、前記第1スイッチと前記第2スイッチとを独立して制御する
請求項7に記載のアンテナ装置。 - 前記能動回路は、第3アンテナからの受信信号が入力され、前記第3アンテナに対応して接続された第3伝送線路を備え、
前記電子ユニットの第2制御信号発生回路から前記第3伝送線路を介して前記能動回路に第2制御信号が供給され、前記能動回路が制御される
請求項1に記載のアンテナ装置。 - 請求項1に記載のアンテナ装置と、
前記第1伝送線路と第1ハイパスフィルタを介して接続され、前記第2伝送線路と第2ハイパスフィルタを介して接続される復調回路とを備え、
前記復調回路と前記第1制御信号発生回路とが接続されている
通信装置。 - 前記復調回路は、
前記第1ハイパスフィルタと前記第2ハイパスフィルタとから入力される信号を復調し、信号品質値を導出し、導出した信号品質値を基に、前記第1制御信号発生回路を制御する
請求項10に記載の通信装置。 - 前記第1ハイパスフィルタと前記第2ハイパスフィルタとから入力される信号の電力値を検出する検出回路を有し、
前記復調回路と前記電源供給回路とは接続され、
前記復調回路が導出した信号品質値、又は前記検出回路が検出した電力値を基に、前記復調回路は前記電源供給回路を制御する
請求項11に記載の通信装置。
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JP2003304181A (ja) * | 2002-04-12 | 2003-10-24 | Fujitsu Ten Ltd | アンテナ切換装置 |
JP2003304166A (ja) * | 2002-04-09 | 2003-10-24 | Toyota Motor Corp | 車載アンテナ装置 |
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JP2006314071A (ja) * | 2005-04-04 | 2006-11-16 | Matsushita Electric Ind Co Ltd | 車載アンテナ装置 |
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-
2009
- 2009-07-27 WO PCT/JP2009/003513 patent/WO2010013430A1/ja active Application Filing
- 2009-07-27 CN CN200980129332.7A patent/CN102106092B/zh not_active Expired - Fee Related
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JPH118576A (ja) * | 1997-05-07 | 1999-01-12 | Lucent Technol Inc | アンテナシステムおよびその制御方法 |
JP2003304166A (ja) * | 2002-04-09 | 2003-10-24 | Toyota Motor Corp | 車載アンテナ装置 |
JP2003304181A (ja) * | 2002-04-12 | 2003-10-24 | Fujitsu Ten Ltd | アンテナ切換装置 |
JP2006211546A (ja) * | 2005-01-31 | 2006-08-10 | Alps Electric Co Ltd | 車載用受信装置 |
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JP2012109752A (ja) * | 2010-11-17 | 2012-06-07 | Nec Corp | アレイアンテナ装置およびそのインピーダンス整合方法 |
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CN102106092A (zh) | 2011-06-22 |
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