CN113726365B - Dual-channel device, radio frequency communication circuit and equipment - Google Patents
Dual-channel device, radio frequency communication circuit and equipment Download PDFInfo
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- CN113726365B CN113726365B CN202111064240.4A CN202111064240A CN113726365B CN 113726365 B CN113726365 B CN 113726365B CN 202111064240 A CN202111064240 A CN 202111064240A CN 113726365 B CN113726365 B CN 113726365B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention provides a double-circuit device, which is applied to a radio frequency circuit, and comprises an input microstrip line, a first branch line, a second branch line, a first output microstrip line, a second output microstrip line, a low-pass filter, a high-pass filter, a first switch group comprising a plurality of switches and a second switch group comprising a plurality of switches; the lengths of the first branch line and the second branch line are one quarter of the wavelength of the radio frequency signals transmitted by the two-way device in the radio frequency communication circuit. The invention also provides a radio frequency communication circuit and radio frequency communication equipment. The two-way device, the radio frequency communication circuit and the radio frequency communication equipment provided by the invention realize the switching of the frequency divider mode and the power divider mode, and avoid the problems of large loss, poor isolation and discontinuous impedance caused by too small frequency band interval.
Description
[ field of technology ]
The present invention relates to the field of radio frequency technologies, and in particular, to a dual-channel device, a radio frequency communication circuit, and an apparatus.
[ background Art ]
Current carrier aggregation (Carrier Aggregation) techniques in 4G, 5G communication systems require separating high and low frequency signals and then allowing the signals in both frequency bands to be transmitted and received simultaneously. In addition, in the LTE-NR dual connectivity (EUTRA-NR Dual Connectivity) technology in the 5G communication system, it may be required to implement that signals of two frequency bands can be transmitted and received simultaneously. Accordingly, it is necessary to develop corresponding components such as a two-way circuit to adapt to different usage scenarios.
The prior art's double-circuit ware adopts the frequency division technique, divides into two sections to a complete frequency channel promptly, walks the low frequency signal all the way, walks the high frequency signal all the way, generally connects a low pass filter and high pass filter in parallel together on the passageway, reaches the effect that makes the signal of two frequency channels work simultaneously. However, when the high-frequency signal and the low-frequency signal in the two frequency band signals are too close and the frequency band interval is too small, larger loss is caused, the isolation is poor and the impedance is discontinuous.
In view of the foregoing, it is desirable to provide a novel dual-channel device, radio frequency communication circuit and apparatus that overcomes the above-mentioned drawbacks.
[ invention ]
The invention aims to provide a two-way device, a radio frequency communication circuit and radio frequency communication equipment, which realize the switching between a frequency divider mode and a power divider mode and avoid the problems of large loss, poor isolation and discontinuous impedance caused by too small frequency band interval.
In order to achieve the above object, in a first aspect, the present invention provides a two-way device, which is applied to a radio frequency circuit, and the two-way device includes an input microstrip line, a first branch line, a second branch line, a first output microstrip line, a second output microstrip line, a low-pass filter, a high-pass filter, a first switch group including a plurality of switches, and a second switch group including a plurality of switches; the lengths of the first branch line and the second branch line are one quarter of the wavelength of the radio frequency signals transmitted by the two-way device in the radio frequency communication circuit; the input microstrip line is connected with the low-pass filter and the high-pass filter through a plurality of switches in the first switch group, and the low-pass filter and the high-pass filter are respectively connected with one ends of the first branch line and the second branch line through a plurality of switches in the first switch group; the input microstrip line is also connected with one end of the first branch line and one end of the second branch line through a plurality of switches in the second switch group; the other ends of the first branch line and the second branch line are respectively connected with the first output microstrip line and the second output microstrip line, and an isolation resistor and a plurality of switches in the second switch group are connected between the other end of the first branch line and the other end of the second branch line; the two-way device realizes the switching of the frequency divider mode and the power divider mode by closing the switch in the first switch group and opening the switch in the second switch group and opening the switch in the first switch group and closing the switch in the second switch group, so as to shunt radio frequency signals with different frequency band intervals.
In a preferred embodiment, the first switch group includes a first frequency dividing switch, a second frequency dividing switch, a third frequency dividing switch, and a fourth frequency dividing switch; the input microstrip line is connected with the low-pass filter through the first frequency dividing switch, the low-pass filter is connected with one end of the first branch line through the second frequency dividing switch, the input microstrip line is connected with the high-pass filter through the third frequency dividing switch, and the high-pass filter is connected with one end of the second branch line through the fourth frequency dividing switch.
In a preferred embodiment, the low-pass filter includes a first inductor, a second inductor and a first capacitor, the input microstrip line is connected to one end of the first inductor through the first frequency dividing switch, the other end of the first inductor is connected to one end of the first branch line through the second frequency dividing switch, and the other end of the first inductor is further connected to the second inductor and the first capacitor and then grounded.
In a preferred embodiment, the high-pass filter includes a second capacitor, a third inductor and a third capacitor, the input microstrip line is connected to one end of the second capacitor through the third frequency dividing switch, the other end of the second capacitor is connected to one end of the second branch line through the fourth frequency dividing switch, and the other end of the second capacitor is further connected to the third inductor and the third capacitor and then grounded.
In a preferred embodiment, the second switch group includes a first power dividing switch, a second power dividing switch, a third power dividing switch, a fourth power dividing switch and a fifth power dividing switch; the input microstrip line is connected with one end of the first power dividing switch, the other end of the first power dividing switch is connected with one end of the first branch line through the second power dividing switch, the other end of the first power dividing switch is connected with one end of the second branch line through the third power dividing switch, and the other end of the first branch line is connected with the other end of the second branch line through the fourth power dividing switch, the isolation resistor and the fifth power dividing switch.
In a preferred embodiment, the first branch line and the first output microstrip line are axisymmetrically arranged with the second branch line and the second output microstrip line, and the first branch line, the first output microstrip line, the second branch line and the second output microstrip line are respectively located at two sides of the symmetry axis.
In a preferred embodiment, the input microstrip line is co-linear with the symmetry axis.
In a second aspect, the present invention further provides a radio frequency communication circuit, including a first single-pole multi-throw switch, a second single-pole multi-throw switch, a plurality of first diplexers connected in one-to-one correspondence with a plurality of contacts of the first single-pole multi-throw switch, a plurality of second diplexers and filters connected in one-to-one correspondence with a plurality of contacts of the second single-pole multi-throw switch, a power amplifier, a radio frequency transceiver, and a diplexer of any one of the above; the first output microstrip line of the two-way device is connected with the first single-pole multi-throw switch, the receiving ends of the first diplexers are connected with the radio frequency transceiver, and the transmitting ends of the first diplexers are connected with the power amplifier; the second output microstrip line of the two-way device is connected with the second single-pole multi-throw switch, the receiving ends of the plurality of second two-way devices are connected with the radio frequency transceiver, the transmitting ends of the plurality of second two-way devices are connected with the power amplifier, and the filter is connected with the radio frequency transceiver through the power amplifier; the input end of the power amplifier is connected with the radio frequency transceiver.
In a preferred embodiment, the first single-pole multi-throw switch comprises two contacts, the first duplexer comprises a Band5 duplexer and a Band1 duplexer, and the two contacts of the first single-pole multi-throw switch are respectively connected with the Band5 duplexer and the Band1 duplexer; the second single-pole multi-throw switch comprises three contacts, the second diplexer comprises a Band3 diplexer and a Band7 diplexer, the filter is a Band40 filter, and the three contacts of the second single-pole multi-throw switch are respectively connected with the Band3 diplexer, the Band7 diplexer and the Band40 filter.
In a third aspect, the present invention also provides a radio frequency communication device, including a radio frequency communication circuit as described in any one of the above.
Compared with the prior art, the two-way device, the radio frequency communication circuit and the equipment provided by the invention comprise the input microstrip line, the first branch line, the second branch line, the first output microstrip line, the second output microstrip line, the low-pass filter and the high-pass filter, and a plurality of switches are arranged between the input microstrip line and the low-pass filter and between the low-pass filter and the high-pass filter and between the input microstrip line and the first branch line and the second branch line and between the input microstrip line and the first branch line and between the input microstrip line and the first branch line and the switch in the second branch line.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a two-way circuit provided by the present invention;
fig. 2 is a circuit diagram of a radio frequency communication circuit provided by the present invention.
[ detailed description ] of the invention
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
Referring to fig. 1, the present invention provides a two-way circuit 100, which is applied IN a radio frequency communication circuit, wherein the two-way circuit 100 includes an input microstrip line stub_in, a first branch line stub_1, a second branch line stub_2, a first output microstrip line stub_out1, a second output microstrip line stub_out2, a low-pass filter 10, a high-pass filter 20, a first switch group 30 including a plurality of switches, and a second switch group 40 including a plurality of switches. Specifically, the lengths of the first branch line stub_1 and the second branch line stub_2 are one quarter of the wavelength of the radio frequency signal transmitted through the multiplexer 100 in the radio frequency communication circuit.
The input microstrip line stub_in is connected to the low-pass filter 10 and the high-pass filter 20 through a plurality of switches IN the first switch group 30, and the low-pass filter 10 and the high-pass filter 20 are connected to one ends of the first branch line stub_1 and the second branch line stub_2 through a plurality of switches IN the first switch group 30, respectively. The input microstrip line stub_in is also connected to one end of the first branch line stub_1 and the second branch line stub_2 through a plurality of switches IN the second switch group 40. The other ends of the first branch line stub_1 and the second branch line stub_2 are respectively connected with the first output microstrip line stub_out1 and the second output microstrip line stub_out2, and an isolation resistor R1 and a plurality of switches in the second switch group 40 are connected between the other end of the first branch line stub_1 and the other end of the second branch line stub_2.
The two-way device 100 realizes the switching between the frequency divider mode and the power divider mode by closing the switch in the first switch group 30 and opening the switch in the second switch group 40, and opening the switch in the first switch group 30 and closing the switch in the second switch group 40, so as to shunt the radio frequency signals with different frequency band intervals. It will be appreciated that when the switches IN the first switch group 30 are closed and the switches IN the second switch group 40 are open, the rf signal passes through the input microstrip line stub_in, the low pass filter 10, the first branch line stub_1, the high pass filter 20, the second branch line stub_2, the first output microstrip line stub_out1 and the second output microstrip line stub_out2 without passing through the isolation resistor R1, at this time, the low pass filter 10 and the first branch line stub_1 can transmit a signal of a low frequency portion of the rf signal, the high pass filter 20 and the second branch line stub_2 can transmit a signal of a high frequency portion of the rf signal, and the two-way divider 100 is IN the divider mode, and can divide two signals (e.g., LTE B5 band and LTE B3 band) with a larger band gap. When the switches IN the first switch group 30 are opened and the switches IN the second switch group 40 are closed, the radio frequency signal passes through the input microstrip line stub_in, the first branch line stub_1, the isolation resistor R1, the second branch line stub_2, the first output microstrip line stub_out1 and the second output microstrip line stub_out2 without passing through the low pass filter 10 and the high pass filter 20, at this time, the input microstrip line stub_in, the first branch line stub_1, the isolation resistor R1, the second branch line stub_2, the first output microstrip line stub_out1 and the second output microstrip line stub_out2 form a standard wilkinson power divider structure, and the two-way switch 100 is IN the power divider mode, and can divide two signals (for example, an LTE B40 band and an LTE B1 band) with a small band gap.
Therefore, the two-way device 100 provided by the present invention includes an input microstrip line stub_in, a first branch stub_1, a second branch stub_2, a first output microstrip line stub_out1, a second output microstrip line stub_out2, a low-pass filter 10, and a high-pass filter 20, and the two-way device 100 is IN a frequency divider mode between the input microstrip line stub_in and the low-pass filter 10 and the high-pass filter 20, between the low-pass filter 10 and the high-pass filter 20 and the first branch stub_1 and the second branch stub_2, between the input microstrip line stub_in and the first branch stub_1 and the second branch stub_2, and between the first branch stub_1 and the second branch stub_2, when the switch IN the first switch group 30 is closed and the switch IN the second switch group 40 is opened, the two-way device 100 can be IN a frequency divider mode, when the two-way device with a larger frequency band gap is separated, the two-gap signal can be separated from the first switch group and the two-way device with a smaller frequency gap, and when the two-way device is not opened, the two-way device is IN a frequency gap mode can be opened, and the two-channel device can be opened, and the two-way device can be prevented from being further, and the frequency gap signal can be opened, and the frequency gap can be widely separated, and a frequency gap can be switched between the two frequency gap signal can be switched between the frequency gap, and a frequency gap can be switched.
Further, the first switch set 30 includes a first frequency dividing switch S11, a second frequency dividing switch S12, a third frequency dividing switch S13, and a fourth frequency dividing switch S14. The input microstrip line stub_in is connected to the low-pass filter 10 through the first frequency dividing switch S11, the low-pass filter 10 is connected to one end of the first branch line stub_1 through the second frequency dividing switch S12, the input microstrip line stub_in is connected to the high-pass filter 20 through the third frequency dividing switch S13, and the high-pass filter 20 is connected to one end of the second branch line stub_2 through the fourth frequency dividing switch S14.
IN this embodiment, the low-pass filter 10 includes a first inductor L1, a second inductor L2, and a first capacitor C1, the input microstrip line stub_in is connected to one end of the first inductor L1 through a first frequency dividing switch S11, the other end of the first inductor L1 is connected to one end of the first branch line stub_1 through a second frequency dividing switch S12, and the other end of the first inductor L1 is further connected to the second inductor L2 and the first capacitor C1 and then grounded. The high-pass filter 20 includes a second capacitor C2, a third inductor L3 and a third capacitor C3, the input microstrip line stub_in is connected to one end of the second capacitor C2 through a third frequency dividing switch S13, the other end of the second capacitor C2 is connected to one end of the second branch line stub_2 through a fourth frequency dividing switch S14, and the other end of the second capacitor C2 is further connected to the third inductor L3 and the third capacitor C3 and then grounded.
The second switch set 20 includes a first power dividing switch S21, a second power dividing switch S22, a third power dividing switch S23, a fourth power dividing switch S24, and a fifth power dividing switch S25. The input microstrip line STUB_IN is connected with one end of a first power dividing switch S21, the other end of the first power dividing switch S21 is connected with one end of a first branch line STUB_1 through a second power dividing switch S22, the other end of the first power dividing switch S21 is also connected with one end of a second branch line STUB_2 through a third power dividing switch S23, and the other end of the first branch line STUB_1 is connected with the other end of the second branch line STUB_2 through a fourth power dividing switch S24, an isolation resistor R1 and a fifth power dividing switch S25.
The application principle of the two-way device 100 provided in this embodiment is as follows:
(1) It is first determined whether the frequency band interval of two radio frequency signals to be transmitted is close to or not so that the frequency band interval must be split by a power divider.
(2) If not, the first frequency dividing switch S11, the second frequency dividing switch S12, the third frequency dividing switch S13 and the fourth frequency dividing switch S14 in the first switch group 30 are closed, and the first power dividing switch S21, the second power dividing switch S22, the third power dividing switch S23, the fourth power dividing switch S24 and the fifth power dividing switch S25 in the second switch group 40 are opened. IN this case, the radio frequency signal passes through the input microstrip line stub_in, the low-pass filter 10 composed of the first inductance L1, the second inductance L2, and the first capacitance C1, the first branch line stub_1, the high-pass filter 20 composed of the second capacitance C2, the third inductance L3, and the third capacitance C3, the second branch line stub_2, the first output microstrip line stub_out1, and the second output microstrip line stub_out2, and does not pass through the isolation resistor R1, and at this time, the low-pass filter 10 and the first branch line stub_1 can transmit a signal of a low frequency portion of the radio frequency signal, and the high-pass filter 20 and the second branch line stub_2 can transmit a signal of a high frequency portion of the radio frequency signal, and the two-way multiplexer 100 can be IN the frequency divider mode, and can divide two signals having a large frequency band interval.
(3) If so, the first frequency dividing switch S11, the second frequency dividing switch S12, the third frequency dividing switch S13 and the fourth frequency dividing switch S14 in the first switch group 30 are opened, and the first power dividing switch S21, the second power dividing switch S22, the third power dividing switch S23, the fourth power dividing switch S24 and the fifth power dividing switch S25 in the second switch group 40 are closed. IN this case, the rf signal passes through the input microstrip line stub_in, the first branch line stub_1, the isolation resistor R1, the second branch line stub_2, the first output microstrip line stub_out1, and the second output microstrip line stub_out2, without passing through the low-pass filter 10 composed of the first inductor L1, the second inductor L2, and the first capacitor C1, and the high-pass filter 20 composed of the second capacitor C2, the third inductor L3, and the third capacitor C3, and at this time, the input microstrip line stub_in, the first branch line stub_1, the isolation resistor R1, the second branch line stub_2, the first output microstrip line stub_out1, and the second output microstrip line stub_out2 form a standard wilkinson power divider structure, and the two-way multiplexer 100 is IN the power divider mode, and can divide two signals having a small frequency band interval.
Further, the first branch line stub_1, the first output microstrip line stub_out1, the second branch line stub_2 and the second output microstrip line stub_out2 are axially symmetrically arranged, the first branch line stub_1, the first output microstrip line stub_out1, the second branch line stub_2 and the second output microstrip line stub_out2 are respectively positioned at two sides of a symmetry axis, and the input microstrip line stub_in and the symmetry axis are positioned on the same straight line. In this embodiment, the first branch line stub_1 and the second branch line stub_2 are rectangular structures lacking one side, and it is understood that the structures of the first branch line stub_1 and the second branch line stub_2 may be circular, elliptical, square, etc., and the lengths of the branch lines may be enough to satisfy a quarter wavelength of a radio frequency signal, so that the design rules of wilkinson power dividers in the prior art can be satisfied, and the principles of the wilkinson power dividers will not be described in detail herein.
Referring to fig. 2 together, the present invention further provides a radio frequency communication circuit 200, which includes a first single-pole multi-throw switch S1, a second single-pole multi-throw switch S2, a plurality of first diplexers 201 connected to the contacts of the first single-pole multi-throw switch S1 in a one-to-one correspondence manner, a plurality of second diplexers 202 and filters 203 connected to the contacts of the second single-pole multi-throw switch S2 in a one-to-one correspondence manner, a power amplifier 204, a radio frequency transceiver 205, and a two-way device according to any of the embodiments.
The first output microstrip line stub_out1 of the two-way circuit is connected to the first single-pole multi-throw switch S1, the receiving ends of the plurality of first diplexers 201 are connected to the radio frequency transceiver 205, and the transmitting ends of the plurality of first diplexers 201 are connected to the power amplifier 204. The second output microstrip line stub_out2 of the two-way circuit 100 is connected to the second single-pole multi-throw switch S2, the receiving ends of the plurality of second diplexers 202 are connected to the radio frequency transceiver 205, the transmitting ends of the plurality of second diplexers 202 are connected to the power amplifier 204, and the filter 203 is connected to the radio frequency transceiver 205 through the power amplifier 204. The input IN of the power amplifier 204 is connected to a radio frequency transceiver 205.
In this design, in the rf communication circuit 200, the rf signal transmitted by the rf transceiver 205 is amplified by the power amplifier 204 and then input to the first duplexer 201, the second duplexer 202 or the filter 203, and then transmitted to the antenna through the duplexer 100, and the rf signal received by the antenna may also be transmitted to the first duplexer 201, the second duplexer 202 or the filter 203 through the duplexer 100, and then filtered by the first duplexer 201, the second duplexer 202 or the filter 203 and then transmitted to the rf transceiver 205. That is, the simultaneous transmission and reception of the signals in the frequency band of the first duplexer 201, the second duplexer 202 or the filter 203 are realized, and the frequency band of the simultaneously transmitted and received signals can be realized by toggling the first single-pole multi-throw switch S1 and the second single-pole multi-throw switch S2, so that the application scenario of the radio frequency communication circuit 200 is wide.
In this embodiment, the first single-pole multi-throw switch S1 is a single-pole double-throw switch, that is, the first single-pole multi-throw switch S1 includes two contacts, the first duplexer 201 includes a Band5 duplexer and a Band1 duplexer, and the two contacts of the first single-pole multi-throw switch S1 are respectively connected to the Band5 duplexer and the Band1 duplexer. Specifically, the common ends of the Band5 duplexer and the Band1 duplexer are respectively connected to the two contacts of the first single-pole multi-throw switch S1, the receiving ends of the Band5 duplexer and the Band1 duplexer are respectively connected to the two receiving ends Band5 RX and Band1RX of the radio frequency transceiver 205, and the transmitting ends of the Band5 duplexer and the Band1 duplexer are respectively connected to the two output ends B5 TX and B1 TX of the power amplifier 204.
Further, the second single-pole multi-throw switch S2 is a single-pole three-throw switch, that is, the second single-pole multi-throw switch includes three contacts, the second diplexer 202 includes a Band3 diplexer and a Band7 diplexer, the filter is a Band40 filter, and the three contacts of the second single-pole multi-throw switch S2 are respectively connected with the Band3 diplexer, the Band7 diplexer and the Band40 filter. Specifically, the common ends of the Band3 duplexer and the Band7 duplexer are respectively connected to the two contacts of the second single-pole multi-throw switch S2, the receiving ends of the Band3 duplexer and the Band7 duplexer are respectively connected to the two receiving ends Band3 RX and Band7RX of the radio frequency transceiver 205, and the transmitting ends of the Band3 duplexer and the Band7 duplexer are respectively connected to the two output ends B3 TX and B7 TX of the power amplifier 204. One end of the Band40 filter is connected with one contact of the second single-pole multi-throw switch S2, the other end of the Band40 filter is connected with a B40 TRX port of the power amplifier 204, and a B40 RX port of the power amplifier 204 is connected with a receiving end Band40 RX of the radio frequency transceiver 205. It will be appreciated that the B40 TRX port is configured to transmit and receive both, and that the B40 band signal is received by a switch (not shown) within the power amplifier 204 that communicates the B40 TRX and B40 RX, since B40 is a TDD band, but not an FDD band, since the FDD band is transmitted and received as different band signals.
The radio frequency communication circuit 200 shown in fig. 2 includes radio frequency signals in LTE B5, LTE B1, LTE B40, LTE B3, and LTE B7 frequency bands in the application scenario. The LTE B5 belongs to the low-frequency Band range 824-894MHz, and other frequency bands are above 1710MHz and are far away from each other, so when the LTE B5 and one of other signals need to be transmitted simultaneously, a frequency divider mode may be used to perform branching, that is, the contact of the first single-pole multi-throw switch S1 is connected with the Band5 duplexer, the contact of the second single-pole multi-throw switch S2 is connected with one of the second diplexers 202 or the filter 203, and the switch in the first switch group 30 is closed, and the switch in the second switch group 40 is opened, so that the simultaneous transmission and reception of the LTE B5 and the signals in other frequency bands can be realized. And LTE B1 belongs to an intermediate frequency Band range 1910-2170MHz, the Band is very close to 2300-2400MHz of LTE B40, when signals of LTE B1 and LTE B40 are required to be transmitted simultaneously, branching is required to be carried out through a power divider mode, namely, a contact of a first single-pole multi-throw switch S1 is connected with a Band1 duplexer, a contact of a second single-pole multi-throw switch S2 is connected with a Band40 filter, a switch in a first switch group 30 is opened, and a switch in a second switch group 40 is closed, so that simultaneous transmission and reception of the signals of LTE B1 and LTE B40 can be realized. It will be appreciated that the power divider mode can separate two signals in close proximity to each other, because the back end has a diplexer or filter in each frequency band, the insertion loss is less than 3dB of the power divider, about 1.5dB, and the impedance is continuous, and the isolation is satisfactory.
The invention also provides a radio frequency communication device, which comprises the radio frequency communication circuit 200 in the embodiment. The radio frequency communication device may be, but is not limited to, a communication device with 2G, 3G, 4G, 5G, FM, GPS, WIFI capabilities. It will be appreciated that all embodiments of the dual-circuit 100 provided by the present invention are applicable to the radio frequency communication circuit 200 and the radio frequency communication device provided by the present invention, and can achieve the same or similar beneficial effects.
IN summary, the present invention provides a dual-band device 100, a radio-frequency communication circuit 200, and a radio-frequency communication apparatus, which includes an input microstrip line stub_in, a first branch stub_1, a second branch stub_2, a first output microstrip line stub_out1, a second output microstrip line stub_out2, a low-pass filter 10, and a high-pass filter 20, wherein a plurality of switches are provided between the input microstrip line stub_in and the low-pass filter 10 and the high-pass filter 20, between the low-pass filter 10 and the high-pass filter 20 and the first branch stub_1 and the second branch stub_2, between the input microstrip line stub_in and the first branch stub_1 and the second branch stub_2, and between the first branch STUB stub_1 and the second branch STUB stub_2, when the switch IN the first switch group 30 is closed and the switch IN the second switch group 40 is opened, the two-way device 100 is IN the frequency divider mode, so that two paths of signals with larger frequency band intervals can be separated, when the switch IN the first switch group 30 is opened and the switch IN the second switch group 40 is closed, the two-way device 100 is IN the power divider mode, so that two paths of signals with smaller frequency band intervals can be separated, namely, the switching between the frequency divider mode and the power divider mode is realized through the opening and closing of a plurality of switches, and then the radio frequency signals with different frequency band intervals are split, so that the application scene is wide, and the problems of large loss, poor isolation and discontinuous impedance caused by too small frequency band intervals are avoided.
The foregoing description is only of embodiments of the present invention, and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (10)
1. The double-circuit device is applied to a radio frequency communication circuit and is characterized by comprising an input microstrip line, a first branch line, a second branch line, a first output microstrip line, a second output microstrip line, a low-pass filter, a high-pass filter, a first switch group comprising a plurality of switches and a second switch group comprising a plurality of switches; the lengths of the first branch line and the second branch line are one quarter of the wavelength of the radio frequency signals transmitted by the two-way device in the radio frequency communication circuit;
the input microstrip line is connected with the low-pass filter and the high-pass filter through a plurality of switches in the first switch group, and the low-pass filter and the high-pass filter are respectively connected with one ends of the first branch line and the second branch line through a plurality of switches in the first switch group; the input microstrip line is also connected with one end of the first branch line and one end of the second branch line through a plurality of switches in the second switch group; the other ends of the first branch line and the second branch line are respectively connected with the first output microstrip line and the second output microstrip line, and an isolation resistor and a plurality of switches in the second switch group are connected between the other end of the first branch line and the other end of the second branch line;
the two-way device realizes the switching of the frequency divider mode and the power divider mode by closing the switch in the first switch group and opening the switch in the second switch group and opening the switch in the first switch group and closing the switch in the second switch group, so as to shunt radio frequency signals with different frequency band intervals.
2. The two-way circuit of claim 1, wherein the first switch set comprises a first divide-by switch, a second divide-by switch, a third divide-by switch, and a fourth divide-by switch; the input microstrip line is connected with the low-pass filter through the first frequency dividing switch, the low-pass filter is connected with one end of the first branch line through the second frequency dividing switch, the input microstrip line is connected with the high-pass filter through the third frequency dividing switch, and the high-pass filter is connected with one end of the second branch line through the fourth frequency dividing switch.
3. The dual-path filter of claim 2, wherein the low-pass filter comprises a first inductor, a second inductor and a first capacitor, the input microstrip line is connected to one end of the first inductor through the first frequency dividing switch, the other end of the first inductor is connected to one end of the first branch line through the second frequency dividing switch, and the other end of the first inductor is further connected to the second inductor and the first capacitor and then grounded.
4. The dual-path filter of claim 3 wherein said high pass filter comprises a second capacitor, a third inductor and a third capacitor, said input microstrip line is connected to one end of said second capacitor through said third divider switch, the other end of said second capacitor is connected to one end of said second branch line through said fourth divider switch, and the other end of said second capacitor is connected to said third inductor and third capacitor and then to ground.
5. The two-way circuit of claim 1, wherein the second switch set comprises a first power division switch, a second power division switch, a third power division switch, a fourth power division switch, and a fifth power division switch; the input microstrip line is connected with one end of the first power dividing switch, the other end of the first power dividing switch is connected with one end of the first branch line through the second power dividing switch, the other end of the first power dividing switch is connected with one end of the second branch line through the third power dividing switch, and the other end of the first branch line is connected with the other end of the second branch line through the fourth power dividing switch, the isolation resistor and the fifth power dividing switch.
6. The dual-path device according to claim 1, wherein the first branch line, the first output microstrip line, the second branch line, and the second output microstrip line are disposed in axisymmetric manner, and the first branch line, the first output microstrip line, and the second branch line, and the second output microstrip line are disposed on two sides of the symmetry axis, respectively.
7. The dual circuit of claim 6, wherein the input microstrip line is co-linear with the symmetry axis.
8. A radio frequency communication circuit comprising a first single pole multiple throw switch, a second single pole multiple throw switch, a plurality of first diplexers connected in one-to-one correspondence with a plurality of contacts of the first single pole multiple throw switch, a plurality of second diplexers and filters connected in one-to-one correspondence with a plurality of contacts of the second single pole multiple throw switch, a power amplifier, a radio frequency transceiver and a diplexer as claimed in any one of claims 1 to 7;
the first output microstrip line of the two-way device is connected with the first single-pole multi-throw switch, the receiving ends of the first diplexers are connected with the radio frequency transceiver, and the transmitting ends of the first diplexers are connected with the power amplifier; the second output microstrip line of the two-way device is connected with the second single-pole multi-throw switch, the receiving ends of the plurality of second two-way devices are connected with the radio frequency transceiver, the transmitting ends of the plurality of second two-way devices are connected with the power amplifier, and the filter is connected with the radio frequency transceiver through the power amplifier; the input end of the power amplifier is connected with the radio frequency transceiver.
9. The radio frequency communication circuit of claim 8, wherein the first single-pole, multi-throw switch comprises two contacts, the first diplexer comprises a Band5 diplexer and a Band1 diplexer, and the two contacts of the first single-pole, multi-throw switch are respectively connected to the Band5 diplexer and the Band1 diplexer; the second single-pole multi-throw switch comprises three contacts, the second diplexer comprises a Band3 diplexer and a Band7 diplexer, the filter is a Band40 filter, and the three contacts of the second single-pole multi-throw switch are respectively connected with the Band3 diplexer, the Band7 diplexer and the Band40 filter.
10. A radio frequency communication device comprising a radio frequency communication circuit as claimed in claim 8 or 9.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103780280A (en) * | 2014-02-27 | 2014-05-07 | 华为技术有限公司 | Radio frequency path |
| CN106603109A (en) * | 2015-10-15 | 2017-04-26 | 中兴通讯股份有限公司 | Carrier aggregation method and terminal |
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| JP2021016049A (en) * | 2019-07-11 | 2021-02-12 | 株式会社村田製作所 | High frequency circuit and communication device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780280A (en) * | 2014-02-27 | 2014-05-07 | 华为技术有限公司 | Radio frequency path |
| CN106603109A (en) * | 2015-10-15 | 2017-04-26 | 中兴通讯股份有限公司 | Carrier aggregation method and terminal |
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