RF transceiver module

Abstract

The present invention provides a radio frequency transceiver module, which includes an input matching circuit, a power amplifier circuit, an output matching circuit, a transceiver switching switch, a filter group, an antenna switch and an antenna; the output matching circuit includes a first transformer, a first capacitor, a first inductor and a plurality of second capacitors with different capacitance values; the first transformer includes a first primary coil and a first secondary coil coupled to each other; the filter group includes a plurality of filters, and the input ends of the plurality of filters are respectively connected one-to-one with the plurality of second ends of the transceiver switching switch; the transceiver switching switch is used to control the connection or disconnection of each of the second capacitors with a corresponding one of the filters in the filter group. After the radio frequency transceiver module in the present invention is turned on in different radio frequency channels, the power amplifier circuit can exert the best performance in the turned-on radio frequency channels, that is, the performance of the power amplifier circuit is improved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a radio frequency transceiver module. Background Art

[0002] The existing sub-3G L-PAMID (RF transceiver module) includes multiple TX (transmitter) channels, and its RF signal is matched to the PA (power amplifier) ​​through the Input Stage Matching (input stage). The performance of the power amplifier is mainly determined by the output matching load (load impedance). The output matching circuit is usually placed on the Laminate (substrate), so the capacitor on the output matching circuit is generally an SMD (surface mount device). The output matching circuit is connected to the TRXSW (transceiver switching switch), which switches the output of the power amplifier to different RF channels. Each RF channel is connected to the filter in the filter group (Filter) of the corresponding band (frequency band) to filter the signal of the corresponding frequency band, and then connected to the ANT (antenna) through the ASM (antenna switch) switch.

[0003] It can be seen that the power amplifier needs to ensure good performance in a wideband range covering all frequency bands to ensure the transmission performance and PAE (power added efficiency) of each RF channel (frequency band) in the RF front-end module. However, the power amplifier in the prior art needs to pay attention to the performance of all frequency bands, and in order to ensure that the transmission performance and power added efficiency of all frequency bands can meet the requirements, it is necessary to ensure that the load impedance covers all bandwidths, which will increase the insertion loss of the output matching circuit and the matching effect is not ideal, which ultimately reduces the performance of the power amplifier. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the present invention proposes a new radio frequency transceiver module to solve the problem of low performance of the power amplifier of the radio frequency transceiver module in the prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides a radio frequency transceiver module, which includes an input matching circuit, a power amplifier circuit, an output matching circuit, a transceiver switching switch, a filter group, an antenna switch and an antenna;

[0007] The input end of the input matching circuit is used to receive a radio frequency signal;

[0008] The input end of the power amplifier circuit is connected to the output end of the input matching circuit;

[0009] The output matching circuit includes a first transformer, a first capacitor, a first inductor, and a plurality of second capacitors with different capacitance values; the first transformer includes a first primary coil and a first secondary coil coupled to each other, the first end of the first primary coil is connected to the first output end of the power amplifier circuit, the second end of the first primary coil is connected to the second output end of the power amplifier circuit, the first end of the first secondary coil is grounded, the first end of the first capacitor is connected to the second end of the first secondary coil, the second end of the first inductor is connected to the second end of the first capacitor, the second end of the first inductor is grounded, and the first ends of the plurality of second capacitors are respectively connected to the second end of the first secondary coil;

[0010] The plurality of first ends of the transceiver switching switch are respectively connected to the second ends of the plurality of second capacitors in a one-to-one correspondence, so as to control the connection or disconnection of the plurality of second capacitors with the filter group;

[0011] The filter group includes a plurality of filters, and the input ends of the plurality of filters are respectively connected to the plurality of second ends of the transceiver switching switch in a one-to-one correspondence; the transceiver switching switch is used to control the connection or disconnection of each of the second capacitors with a corresponding one of the filters in the filter group;

[0012] The plurality of first ends of the antenna switch are respectively connected to the output ends of the plurality of filters in a one-to-one correspondence, and are used to control the connection or disconnection of the plurality of filters with the antenna;

[0013] The input end of the antenna is respectively connected to a plurality of second ends of the antenna switch, and the antenna is used for transmitting signals.

[0014] Preferably, the RF transceiver module also includes a third capacitor, a first end of the third capacitor is connected to the output end of the input matching circuit, and a second end of the third capacitor is connected to the input end of the power amplifier circuit.

[0015] Preferably, the power amplifier circuit includes a first triode, a second inductor, a second transformer, a second triode, a third inductor, a third triode, a fourth inductor and three bias circuits;

[0016] The base of the first transistor serves as the input end of the power amplifier circuit, and the emitter of the first transistor is grounded;

[0017] A first end of the second inductor is connected to a first operating voltage, and a second end of the second inductor is connected to a collector of the first transistor;

[0018] The second transformer comprises a second primary coil and a second secondary coil coupled to each other, a first end of the second primary coil is grounded, and a second end of the second primary coil is connected to the collector of the first transistor;

[0019] The base of the second transistor is connected to the first end of the second secondary coil, the emitter of the second transistor is grounded, and the collector of the second transistor serves as the first output end of the power amplifier circuit;

[0020] A first end of the third inductor is connected to a second operating voltage, and a second end of the third inductor is connected to a collector of the second transistor;

[0021] The base of the third transistor is connected to the second end of the second secondary coil, the emitter of the third transistor is grounded, and the collector of the third transistor serves as the second output end of the power amplifier circuit;

[0022] A first end of the fourth inductor is connected to the second operating voltage, and a second end of the fourth inductor is connected to the collector of the third transistor;

[0023] The output ends of the three bias circuits are respectively connected to the base of the first transistor, the base of the second transistor and the base of the third transistor.

[0024] Preferably, the three bias circuits have the same structure, and each bias circuit comprises a fifth inductor, a fourth transistor, a fifth transistor, a fourth capacitor, a sixth inductor, a sixth transistor and a seventh inductor;

[0025] The first end of the fifth inductor is connected to the adjustment voltage;

[0026] The collector of the fourth triode is connected to the second end of the fifth inductor and the base of the fourth triode respectively;

[0027] The collector of the fifth transistor is connected to the emitter of the fourth transistor and the base of the fifth transistor respectively, and the emitter of the fifth transistor is grounded;

[0028] The first end of the fourth capacitor is connected to the base of the fourth transistor;

[0029] The first end of the sixth inductor is connected to the second end of the fourth capacitor, and the second end of the sixth inductor is grounded;

[0030] The base of the sixth transistor is connected to the base of the fourth transistor, and the collector of the sixth transistor is connected to the power supply voltage;

[0031] The first end of the seventh inductor is connected to the emitter of the sixth transistor, and the second end of the seventh inductor serves as the output end of the bias circuit.

[0032] Preferably, the radio frequency transceiver module further includes a fifth capacitor and a sixth capacitor;

[0033] A first end of the fifth capacitor is connected to the middle tap of the second secondary coil, and a second end of the fifth capacitor is grounded;

[0034] A first end of the sixth capacitor is connected to a center tap of the first primary coil, and a second end of the sixth capacitor is grounded.

[0035] Preferably, the transceiver switching switch includes multiple single-pole single-throw switches; the first ends of the multiple single-pole single-throw switches respectively serve as multiple first ends of the transceiver switching switch, and the second ends of the multiple single-pole single-throw switches respectively serve as multiple second ends of the transceiver switching switch.

[0036] Compared with the prior art, the RF transceiver module in the present invention utilizes the characteristics of the transceiver switching switch to select different channels, so as to debug the output matching capacitor of the power amplifier circuit according to the optimal performance of each frequency band, that is, multiple second capacitors are debugged according to the optimal performance of each frequency band, and then the capacitance value corresponding to each frequency band is connected in series in the corresponding RF channel. In this way, when different RF channels are turned on, the power amplifier circuit can perform at its best in the turned-on RF channel, which is equivalent to improving the performance of the power amplifier circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings. The above and other aspects of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings. In the accompanying drawings:

[0038] Figure 1 A circuit module diagram of a radio frequency transceiver module provided in an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of a partial structure circuit of an input matching circuit and a power amplifier circuit in a radio frequency transceiver module provided in an embodiment of the present invention;

[0040] Figure 3 The radio frequency transceiver module provided for the embodiment of the present invention includes an output matching circuit, a transceiver switching switch, a filter group, an antenna switch and a partial structural circuit schematic diagram of the antenna. DETAILED DESCRIPTION

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0042] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The embodiment of the present invention provides a radio frequency transceiver module 100, Figures 1 to 3 As shown, it includes an input matching circuit 1, a power amplifying circuit 2, an output matching circuit 3, a transmit / receive switching switch 4, a filter group 5, an antenna switch 6 and an antenna 7.

[0045] The input end of the input matching circuit 1 is used to receive a radio frequency signal (Rfin).

[0046] The input end of the power amplifier circuit 2 is connected to the output end of the input matching circuit 1 .

[0047] The output matching circuit 3 includes a first transformer T1, a first capacitor C1, a first inductor L1 and a plurality of second capacitors with different capacitance values; the first transformer T1 includes a first primary coil and a first secondary coil coupled to each other, the first end of the first primary coil is connected to the first output end of the power amplifier circuit 2, the second end of the first primary coil is connected to the second output end of the power amplifier circuit 2, the first end of the first secondary coil is grounded, the first end of the first capacitor C1 is connected to the second end of the first secondary coil, the first end of the first inductor L1 is connected to the second end of the first capacitor C1, the second end of the first inductor L1 is grounded, and the first ends of the plurality of second capacitors are respectively connected to the second end of the first secondary coil.

[0048] The multiple first ends of the transceiver switch 4 are respectively connected to the second ends of the multiple second capacitors in a one-to-one correspondence.

[0049] The filter group 5 includes multiple filters, and the input ends of the multiple filters are connected one by one to the multiple second ends of the transceiver switching switch 4; the transceiver switching switch 4 is used to control the connection or disconnection of each second capacitor with a corresponding filter in the filter group.

[0050] The multiple first ends of the antenna switch 6 are connected to the output ends of the multiple filters in a one-to-one correspondence, and are used to control the connection or disconnection of the multiple filters with the antenna 7 respectively.

[0051] The input end of the antenna 7 is respectively connected to the multiple second ends of the antenna switch 6, and the antenna 7 is used to transmit signals.

[0052] In this embodiment, the RF transceiver module 100 further includes a third capacitor C3, a first end of the third capacitor C3 is connected to the output end of the input matching circuit 1, and a second end of the third capacitor C3 is connected to the input end of the power amplifier circuit 2. The third capacitor C3 is used as a DC blocking capacitor, and it can also be used as a part of the input matching circuit 1.

[0053] In this embodiment, the power amplifier circuit 2 includes a first transistor Q1, a second inductor L2, a second transformer T2, a second transistor Q2, a third inductor L3, a third transistor Q3, a fourth inductor L4 and three bias circuits 21;

[0054] The base of the first transistor Q1 serves as the input terminal of the power amplifier circuit 2, and the emitter of the first transistor Q1 is grounded;

[0055] A first end of the second inductor L2 is connected to the first operating voltage (Vcc1), and a second end of the second inductor L2 is connected to the collector of the first transistor Q1;

[0056] The second transformer T2 includes a second primary coil and a second secondary coil coupled to each other, a first end of the second primary coil is grounded, and a second end of the second primary coil is connected to the collector of the first transistor Q1;

[0057] The base of the second transistor Q2 is connected to the first end of the second secondary coil, the emitter of the second transistor Q2 is grounded, and the collector of the second transistor Q2 serves as the first output end of the power amplifier circuit 2;

[0058] A first end of the third inductor L3 is connected to the second operating voltage (Vcc2), and a second end of the third inductor L3 is connected to the collector of the second transistor Q2;

[0059] The base of the third transistor Q3 is connected to the second end of the second secondary coil, the emitter of the third transistor Q3 is grounded, and the collector of the third transistor Q3 serves as the second output end of the power amplifier circuit 2;

[0060] A first end of the fourth inductor L4 is connected to the second operating voltage, and a second end of the fourth inductor L4 is connected to the collector of the third transistor Q3;

[0061] The output ends of the three bias circuits 21 are respectively connected to the base of the first transistor Q1 , the base of the second transistor Q2 , and the base of the third transistor Q3 .

[0062] The circuit structures of the three bias circuits 21 are the same. Each bias circuit 21 includes a fifth inductor L5, a fourth transistor Q4, a fifth transistor Q5, a fourth capacitor C4, a sixth inductor L6, a sixth transistor Q6 and a seventh inductor L7.

[0063] A first terminal of the fifth inductor L5 is connected to the adjustment voltage;

[0064] The collector of the fourth transistor Q4 is connected to the second end of the fifth inductor L5 and the base of the fourth transistor Q4 respectively;

[0065] The collector of the fifth transistor Q5 is connected to the emitter of the fourth transistor Q4 and the base of the fifth transistor Q5 respectively, and the emitter of the fifth transistor Q5 is grounded;

[0066] A first end of the fourth capacitor C4 is connected to the base of the fourth transistor Q4;

[0067] A first end of the sixth inductor L6 is connected to a second end of the fourth capacitor C4, and a second end of the sixth inductor L6 is grounded;

[0068] The base of the sixth transistor Q6 is connected to the base of the fourth transistor Q4, and the collector of the sixth transistor Q6 is connected to the power supply voltage (Vbatt);

[0069] A first end of the seventh inductor L7 is connected to the emitter of the sixth transistor Q6 , and a second end of the seventh inductor L7 serves as an output end of the bias circuit 21 .

[0070] The adjustment voltage connected to the first end of the fifth inductor L5 in the bias circuit 21 connected to the base of the first transistor Q1 is the first adjustment voltage (Vreg1), and the adjustment voltage connected to the first ends of the fifth inductors L5 of the other two bias circuits 21 is the second adjustment voltage (Vreg2), and the second adjustment voltage and the first adjustment voltage have different voltage values.

[0071] The RF transceiver module 100 further includes a fifth capacitor C5 and a sixth capacitor C6;

[0072] A first end of the fifth capacitor C5 is connected to the middle tap of the second secondary coil, and a second end of the fifth capacitor C5 is grounded;

[0073] A first end of the sixth capacitor C6 is connected to the middle tap of the first primary coil, and a second end of the sixth capacitor C6 is grounded.

[0074] In this embodiment, the transceiver switch 4 includes a plurality of single-pole single-throw switches; the first ends of the plurality of single-pole single-throw switches are respectively used as the plurality of first ends of the transceiver switch 4, and the second ends of the plurality of single-pole single-throw switches are respectively used as the plurality of second ends of the transceiver switch 4. Of course, according to actual needs, the transceiver switch 4 can also be designed as a single-pole multi-throw switch, so that the single-pole multi-throw switch is designed between the second end of the first secondary coil and the plurality of second capacitors, at which time the control end of the single-pole multi-throw switch is connected to the second end of the first secondary coil, and the plurality of connection ends of the single-pole multi-throw switch are respectively connected to the first ends of the plurality of second capacitors, and the plurality of filters in the corresponding filter group 5 are respectively directly connected to the second ends of the second capacitors.

[0075] The antenna switch 6 can select multiple other single-pole single-throw switches, or a single-pole multi-throw switch: if multiple single-pole single-throw switches are selected, the first ends of the multiple single-pole single-throw switches are respectively used as the multiple first ends of the antenna switch 6, and the second ends of the multiple single-pole single-throw switches are respectively used as the multiple second ends of the antenna switch 6; if a single-pole multi-throw switch is selected, the multiple connection ends of the single-pole multi-throw switch are respectively used as the multiple first ends of the antenna switch 6, and the control ends of the single-pole multi-throw switches are collectively used as the second ends of the antenna switch 6.

[0076] In this embodiment, channels of different frequency bands of the RF transceiver module 100 serve as different RF channels. Taking four RF channels as an example, the four RF channels are RF channel 1 (band1), RF channel 2 (band2), RF channel 3 (band3), RF channel 4 (band4), etc., and their number is set according to the frequency band requirements. The multiple second capacitors are Ca1, Ca2, Ca3, Ca4, etc., the multiple single-pole single-throw switches in the transceiver switching switch 4 are S1, S2, S3, S4, etc., and the multiple filters in the filter group 5 are Z1, Z2, Z3, Z4, etc.

[0077] When the RF transceiver module 100 is used as a signal transmitting module, the input end of the input matching circuit 1 is used to receive RF signals, and the antenna 7 is used to transmit RF signals; when the RF transceiver module 100 is used as a signal receiving module, the input end of the input matching circuit 1 is used to output RF signals, and the antenna 7 is used to receive RF signals.

[0078] In the RF transceiver module 100 of this embodiment, after the transceiver switching switch 4 selects the output RF channel, the second capacitor connected in series with the RF channel and the first transformer T1, the first capacitor C1, and the first inductor L1 form an output matching circuit 3 of the power amplifier circuit 2 (power amplifier). The output matching circuit 3 enables the power amplifier circuit 2 to have the best performance in each RF channel. When the RF signal passes through the filter and the switching of the antenna switch 6, it is output to the antenna 7. That is, after the transmit-receive switching switch 4 selects the output RF channel band1, the second capacitor Ca1 connected in series with the RF channel and the first transformer T1, the first capacitor C1, and the first inductor L1 form an output matching circuit 3 of the power amplifier circuit 2 (power amplifier). The output matching circuit 3 makes the power amplifier circuit 2 have the best performance in the RF channel band1, and the RF signal is output to the antenna 7 after passing through the filter and switching of the antenna switch 6; after the transmit-receive switching switch 4 selects the output RF channel band2, the second capacitor Ca2 connected in series with the first transformer T1, the first capacitor C1, and the first inductor L1 form an output matching circuit 3 of the power amplifier circuit 2 (power amplifier). The output matching circuit 3 makes the power amplifier circuit 2 have the best performance in the RF channel band2, and the RF signal is output to the antenna 7 after passing through the filter and switching of the antenna switch 6.

[0079] Compared with the prior art, the RF transceiver module 100 in this embodiment uses the characteristics of the transceiver switching switch 4 to select different channels to adjust the output matching capacitor of the power amplifier circuit 2 according to the best performance of each frequency band, that is, multiple second capacitors are respectively adjusted according to the best performance of each frequency band, and then the capacitance value corresponding to each frequency band is connected in series in the corresponding RF channel, so that when different RF channels are turned on, the power amplifier circuit 2 can play the best performance in the turned-on RF channel, which is equivalent to improving the performance of the power amplifier circuit 2 and is not limited by bandwidth. In addition, for optimizing the load impedance of different RF channels, it is only necessary for the power amplifier circuit 2 to play the maximum performance in the narrowband RF channel in which it is located, so that the transmission performance and power added efficiency of the power amplifier circuit 2 can be optimized to the maximum. At the same time, the capacitors in the output matching of the power amplifier in the prior art are generally in the form of SMD, and this embodiment reduces the output matching devices of the power amplifier circuit 2 by directly connecting the output capacitor (second capacitor) of the power amplifier circuit 2 to the transceiver switching switch 4, thereby greatly reducing the area occupied by the output matching of the power amplifier circuit 2.

[0080] It should be noted that the various embodiments described above with reference to the accompanying drawings are only used to illustrate the present invention rather than to limit the scope of the present invention. Those skilled in the art should understand that any modification or equivalent substitution of the present invention without departing from the spirit and scope of the present invention should be included within the scope of the present invention. In addition, unless otherwise indicated by the context, words appearing in the singular include the plural form, and vice versa. In addition, unless otherwise specified, all or part of any embodiment may be used in combination with all or part of any other embodiment.

Claims

1. A radio frequency transceiver module, characterized in that: The radio frequency transceiver module includes an input matching circuit, a power amplifier circuit, an output matching circuit, a transceiver switching switch, a filter group, an antenna switch and an antenna; The input end of the input matching circuit is used to receive a radio frequency signal; The input end of the power amplifier circuit is connected to the output end of the input matching circuit; The output matching circuit includes a first transformer, a first capacitor, a first inductor, and a plurality of second capacitors with different capacitance values; the first transformer includes a first primary coil and a first secondary coil coupled to each other, the first end of the first primary coil is connected to the first output end of the power amplifier circuit, the second end of the first primary coil is connected to the second output end of the power amplifier circuit, the first end of the first secondary coil is grounded, the first end of the first capacitor is connected to the second end of the first secondary coil, the first end of the first inductor is connected to the second end of the first capacitor, the second end of the first inductor is grounded, and the first ends of the plurality of second capacitors are respectively connected to the second end of the first secondary coil; The plurality of first ends of the transceiver switching switch are respectively connected to the second ends of the plurality of second capacitors in a one-to-one correspondence; The filter group includes a plurality of filters, and the input ends of the plurality of filters are respectively connected to the plurality of second ends of the transceiver switching switch in a one-to-one correspondence; the transceiver switching switch is used to control the connection or disconnection of each of the second capacitors with a corresponding one of the filters in the filter group; The plurality of first ends of the antenna switch are respectively connected to the output ends of the plurality of filters in a one-to-one correspondence, and are used to control the connection or disconnection of the plurality of filters with the antenna; The input end of the antenna is respectively connected to a plurality of second ends of the antenna switch, and the antenna is used for transmitting signals.

2. The radio frequency transceiver module according to claim 1, characterized in that: The RF transceiver module also includes a third capacitor, a first end of the third capacitor is connected to the output end of the input matching circuit, and a second end of the third capacitor is connected to the input end of the power amplifier circuit.

3. The radio frequency transceiver module according to claim 1, characterized in that: The power amplifier circuit includes a first triode, a second inductor, a second transformer, a second triode, a third inductor, a third triode, a fourth inductor and three bias circuits; The base of the first transistor serves as the input end of the power amplifier circuit, and the emitter of the first transistor is grounded; A first end of the second inductor is connected to a first operating voltage, and a second end of the second inductor is connected to a collector of the first transistor; The second transformer comprises a second primary coil and a second secondary coil coupled to each other, a first end of the second primary coil is grounded, and a second end of the second primary coil is connected to the collector of the first transistor; The base of the second transistor is connected to the first end of the second secondary coil, the emitter of the second transistor is grounded, and the collector of the second transistor serves as the first output end of the power amplifier circuit; A first end of the third inductor is connected to a second operating voltage, and a second end of the third inductor is connected to a collector of the second transistor; The base of the third transistor is connected to the second end of the second secondary coil, the emitter of the third transistor is grounded, and the collector of the third transistor serves as the second output end of the power amplifier circuit; A first end of the fourth inductor is connected to the second operating voltage, and a second end of the fourth inductor is connected to the collector of the third transistor; The output ends of the three bias circuits are respectively connected to the base of the first transistor, the base of the second transistor and the base of the third transistor.

4. The radio frequency transceiver module according to claim 3, characterized in that: The three bias circuits have the same structure, and each bias circuit includes a fifth inductor, a fourth transistor, a fifth transistor, a fourth capacitor, a sixth inductor, a sixth transistor and a seventh inductor; The first end of the fifth inductor is connected to the adjustment voltage; The collector of the fourth triode is connected to the second end of the fifth inductor and the base of the fourth triode respectively; The collector of the fifth transistor is connected to the emitter of the fourth transistor and the base of the fifth transistor respectively, and the emitter of the fifth transistor is grounded; The first end of the fourth capacitor is connected to the base of the fourth transistor; The first end of the sixth inductor is connected to the second end of the fourth capacitor, and the second end of the sixth inductor is grounded; The base of the sixth transistor is connected to the base of the fourth transistor, and the collector of the sixth transistor is connected to the power supply voltage; The first end of the seventh inductor is connected to the emitter of the sixth transistor, and the second end of the seventh inductor serves as the output end of the bias circuit.

5. The radio frequency transceiver module according to claim 4, characterized in that: The radio frequency transceiver module also includes a fifth capacitor and a sixth capacitor; A first end of the fifth capacitor is connected to the middle tap of the second secondary coil, and a second end of the fifth capacitor is grounded; A first end of the sixth capacitor is connected to a center tap of the first primary coil, and a second end of the sixth capacitor is grounded.

6. The radio frequency transceiver module according to claim 1, characterized in that: The transceiver switching switch includes multiple single-pole single-throw switches; the first ends of the multiple single-pole single-throw switches are respectively used as multiple first ends of the transceiver switching switch, and the second ends of the multiple single-pole single-throw switches are respectively used as multiple second ends of the transceiver switching switch.

Images