Transmitting circuit of radio frequency transceiving module and radio frequency transceiving module

Abstract

The utility model discloses a transmitting circuit of a radio frequency transmit-receive module and the radio frequency transmit-receive module, and relates to the technical field of radio frequency. A radio frequency power amplifier comprises a plurality of stages of amplification modules and a filtering module arranged between any two amplification modules; a filtering module is additionally arranged in the radio frequency power amplifier to suppress the influence of a transmitting signal on a receiving signal, and the filtering module is used for suppressing noise and stray of a receiving frequency band; the filtering module is arranged between the stages of the multi-stage amplification module of the radio frequency power amplifier, so that the insertion loss of the filter can only influence the pre-stage amplifier, the efficiency of the final-stage amplifier is not influenced, and the transmitting efficiency of the transmitting circuit is improved; in addition, the filtering module arranged between the stages can improve the stage matching of the amplification module, the linearity of a transmitted signal is improved, the type selection requirement for the filtering module is reduced, the signal interference between the transmitting circuit and the receiving circuit in the radio frequency module is inhibited in a balanced mode, and the transmitting efficiency of the transmitting circuit is improved.

Description

Technical Field

[0001] The utility model relates to the field of radio frequency technology, in particular to a transmitting circuit of a radio frequency transceiver module and a radio frequency transceiver module. Background Art

[0002] With the development and progress of cellular communication technology, especially in 4G communication systems and 5G communication systems, higher-order signal modulation technologies have been introduced. In this case, how to improve the transmission efficiency of the transmitting circuit in the RF module is a technical problem that needs to be solved urgently. At the same time, with the introduction of multi-frequency and multi-mode working modes and carrier aggregation technology, how to suppress the signal interference between the transmitting circuit and the receiving circuit in the RF module has also become another technical problem that needs to be solved urgently. These two problems affect each other, and it is difficult to achieve good solutions at the same time. Utility Model Content

[0003] The purpose of the utility model is to provide a transmitting circuit of a radio frequency transceiver module and a radio frequency transceiver module, wherein a filter module is arranged between stages of a multi-stage amplification module of a radio frequency power amplifier, so that the insertion loss of the filter can only affect the pre-stage amplifier, while the efficiency of the final amplifier is not affected, thereby improving the transmission efficiency of the overall transmitting circuit; the filter module arranged between stages can also improve the inter-stage matching of the amplification module, help to improve the linearity of the transmitted signal, reduce the selection requirements for the filter module, and achieve balanced suppression of signal interference between the transmitting circuit and the receiving circuit in the radio frequency module and improvement of the transmission efficiency of the transmitting circuit.

[0004] In order to solve the above technical problems, the utility model provides a transmitting circuit of a radio frequency transceiver module, comprising:

[0005] An input module, the input end of which is connected to a signal source and is used to receive an input signal to be transmitted;

[0006] A radio frequency power amplifier, whose input end is connected to the output end of the input module and is used to amplify the input signal;

[0007] Wherein, the radio frequency power amplifier comprises:

[0008] Several stages of amplification modules and filtering modules are arranged between any two amplification modules, and the amplification modules of several stages are connected in series in sequence.

[0009] Optionally, the amplification module includes an amplification device, a first inductor and a bias module, the control end of the amplification device serves as the input end of the amplification module and is connected to the output end of the bias module, the first end of the amplification device is grounded, the second end is connected to the first end of the first inductor, and the second end of the first inductor is connected to the first power supply;

[0010] The bias module is used to provide a fixed bias voltage for the amplifier device.

[0011] Optionally, the bias module includes a resistor, a first triode, a second triode and a third triode, the emitter of the first triode is grounded, the base is respectively connected to the collector of the first triode and the emitter of the second triode, the first end of the resistor is connected to a preset voltage, the second end is respectively connected to the collector of the second triode, the base of the second triode and the base of the third triode, the collector of the third triode is connected to a second power supply, and the emitter of the third triode serves as the output end of the bias module.

[0012] Optionally, the bias module further includes a first capacitor, a first end of the first capacitor is grounded, and a second end of the first capacitor is connected to the base of the third transistor.

[0013] Optionally, the transmitting circuit of the RF transceiver module also includes a first matching module and a second matching module, the first matching module is arranged between the filtering module and an amplifying module connected to the filtering module, and the second matching module is arranged between the filtering module and another amplifying module connected to the filtering module.

[0014] Optionally, the first matching module includes a second capacitor and a second inductor, a first end of the second capacitor is connected to a second end of an amplifying device of the amplifying module, a second end is respectively connected to a first end of the second inductor and an input end of the filtering module, and a second end of the second inductor is grounded;

[0015] The second matching module includes a third capacitor and a third inductor, the first end of the third capacitor is respectively connected to the first end of the third inductor and the output end of the filtering module, the second end of the third inductor is grounded, and the second end of the third capacitor is connected to the control end of the amplifier device of another amplifier module.

[0016] Optionally, the filtering module includes several filters of different frequency bands, and the transmitting circuit of the RF transceiver module also includes a first switching switch and a second switching switch, the fixed end of the first switching switch is connected to the output end of an amplification module, and the several switching ends are respectively connected one-to-one with the input ends of several filters of different frequency bands, the several switching ends of the second switching switch are respectively connected one-to-one with the output ends of several filters of different frequency bands, and the fixed end is connected to the input end of another amplification module.

[0017] In order to solve the above technical problems, the utility model also provides a radio frequency transceiver module, including an antenna, a receiving circuit and a transmitting circuit of the radio frequency transceiver module as described above, the input end of the antenna is connected to the output end of the transmitting circuit of the radio frequency transceiver module, and the output end is connected to the input end of the receiving circuit.

[0018] Optionally, the receiving circuit includes a receiving filter, a receiving amplifier and an output module, the input end of the receiving filter is connected to the output end of the antenna, the input end of the receiving amplifier is connected to the output end of the receiving filter, and the output end is connected to the input end of the output module.

[0019] Optionally, the RF transceiver module also includes a transmission frequency band selection switch, a reception frequency band selection switch and an antenna switch, the fixed end of the transmission frequency band selection switch is connected to the output end of the RF power amplifier, the fixed end of the antenna switch is connected to the input end of the antenna, the switching end is respectively connected to the switching end of the transmission frequency band selection switch and the switching end of the reception frequency band selection switch, and the fixed end of the reception frequency band selection switch is connected to the input end of the receiving circuit.

[0020] The utility model provides a transmitting circuit of a radio frequency transceiver module, comprising an input module and a radio frequency power amplifier, wherein the radio frequency power amplifier comprises a plurality of stages of amplification modules and a filter module arranged between any two amplification modules, and the influence of a transmission signal on a reception signal is suppressed by adding a filter module in the radio frequency power amplifier, and the noise and spurious in the reception frequency band are suppressed by the filter module; and because the filter module is arranged between stages of the multi-stage amplification modules of the radio frequency power amplifier, the insertion loss of the filter can only affect the pre-stage amplifier, while the efficiency of the final stage amplifier is not affected, thereby improving the transmission efficiency of the overall transmitting circuit; the filter module arranged between stages can also improve the inter-stage matching of the amplification modules, help to improve the linearity of the transmission signal, reduce the selection requirements for the filter module, and realize balanced suppression of signal interference between the transmitting circuit and the receiving circuit in the radio frequency module and improvement of the transmission efficiency of the transmitting circuit.

[0021] The utility model also provides a radio frequency transceiver module, which has the same beneficial effects as the transmitting circuit of the radio frequency transceiver module mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the prior art and the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the structure of a transmitting circuit of a radio frequency transceiver module provided by the utility model;

[0024] Figure 2 A schematic structural diagram of a first embodiment of a two-stage amplified radio frequency power amplifier provided by the utility model;

[0025] Figure 3 A schematic structural diagram of a second embodiment of a two-stage amplified radio frequency power amplifier provided by the utility model;

[0026] Figure 4 A schematic structural diagram of a third embodiment of a two-stage amplified radio frequency power amplifier provided by the utility model;

[0027] Figure 5 A schematic diagram of the structure of a three-stage amplification radio frequency power amplifier provided by the utility model;

[0028] Figure 6 A schematic diagram of the structure of another three-stage amplification radio frequency power amplifier provided by the utility model;

[0029] Figure 7 A schematic diagram of the structure of a bias module provided by the utility model;

[0030] Figure 8 A structural schematic diagram of a matching module provided by the utility model;

[0031] Fig. 9 A structural schematic diagram of another matching module provided by the utility model;

[0032] Fig.10 A schematic diagram of the structure of a multi-frequency radio frequency power amplifier provided by the utility model;

[0033] Fig.11 The utility model provides a structural schematic diagram of a radio frequency transceiver module. DETAILED DESCRIPTION

[0034] The core of the utility model is to provide a transmitting circuit of a radio frequency transceiver module and a radio frequency transceiver module. The filter module is arranged between the stages of the multi-stage amplification module of the radio frequency power amplifier, so that the insertion loss of the filter can only affect the front-stage amplifier, while the efficiency of the final-stage amplifier is not affected, thereby improving the transmission efficiency of the overall transmitting circuit; the filter module arranged between the stages can also improve the inter-stage matching of the amplification module, help to improve the linearity of the transmission signal, reduce the selection requirements for the filter module, and achieve balanced suppression of signal interference between the transmitting circuit and the receiving circuit in the radio frequency module and improve the transmission efficiency of the transmitting circuit.

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of the transmitting circuit of a radio frequency transceiver module provided by the utility model; please refer to Figure 2 , Figure 2 This is a structural diagram of the first embodiment of the two-stage amplified RF power amplifier provided by the utility model; please refer to Figure 3 , Figure 3 This is a structural diagram of a second embodiment of the two-stage amplified RF power amplifier provided by the utility model; please refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of the third embodiment of the two-stage amplified RF power amplifier provided by the utility model; please refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of a three-stage amplification RF power amplifier provided by the utility model; please refer to Figure 6 , Figure 6 A schematic diagram of the structure of another three-stage amplified RF power amplifier provided by the utility model; To solve the above technical problems, the utility model provides a transmitting circuit of a RF transceiver module, including:

[0037] Input module 2, the input end of which is connected to signal source 1 and is used to receive the input signal to be transmitted;

[0038] A radio frequency power amplifier 3, whose input end is connected to the output end of the input module 2, and is used to amplify the input signal;

[0039] The radio frequency power amplifier 3 comprises:

[0040] A plurality of stages of amplifying modules 31 and a filtering module 32 disposed between any two amplifying modules 31 , wherein the plurality of stages of amplifying modules 31 are connected in series in sequence.

[0041] Specifically, in the RF transceiver module, in order to suppress the interference of the transmission signal on the receiving signal, it is necessary to add a filter module 32 in the process of the transmitting circuit outputting the transmission signal to filter out the signals of the partial frequency bands in the transmission signal that are close to the frequency band of the receiving signal and may interfere with the receiving signal, thereby suppressing the interference of the transmission signal on the receiving signal, but the filter module 32 is usually implemented by a filter. In the process of adding the filter to the transmitting circuit, the filter will bring a certain insertion loss, and this insertion loss will reduce the transmission efficiency of the overall transmitting circuit. At this time, considering that the RF power amplifier 3 in the transmitting circuit will have a multi-stage amplification module 31, usually 2-3 stages of amplification modules 31, and the final amplifier has the greatest impact on the transmission efficiency of the whole machine, therefore, the present application sets the filter for suppressing signal interference between the stages of the multi-stage amplification module 31 in the RF power amplifier 3, and moves the filter to the input end of the final amplifier, so that the insertion loss of the filter can only affect the pre-amplifier, while the efficiency of the final amplifier is not affected, thereby improving the overall transmission efficiency and reducing the impact of the insertion loss on the overall transmission efficiency.

[0042] Specifically, the input module 2 in the transmitting circuit obtains the input signal to be transmitted from the signal source 1, and then outputs the input signal to the RF power amplifier 3 for amplification, and then uses the transmitting device such as the antenna to transmit the amplified input signal, thereby realizing the RF transmission process; when the receiving device such as the antenna receives the received signal, the receiving device will output the received signal to the receiving filter, use the receiving filter to filter out spurious signals such as noise in the received signal, and then amplify the received signal through the receiving low-noise amplifier and feed the amplified received signal back to the signal source 1 through the output module, thereby realizing the RF reception process.

[0043] It can be understood that the present application does not make any special restrictions on the specific types and implementation methods of the input module 2, the RF power amplifier 3, the amplification module 31 and the filter module 32 in the transmitting circuit. The amplification module 31 can be implemented using various types of power electronic devices working in the amplification area, and the filter module 32 can be implemented using various types of filters. The present application does not make any special restrictions on the specific setting position and connection method of the filter module 32. A filter module 32 can be provided between any two amplification modules 31 in the RF power amplifier 3, or a filter module 32 can be provided between some two amplification modules 31 in the RF power amplifier 3. For example, when there are three-stage amplification modules 31 in the RF power amplifier 3, a filter module 32 can be provided between the first-stage amplification module 3. A filter module 32 is provided between the first-stage amplification module 31 and the second-stage amplification module 31, and between the second-stage amplification module 31 and the third-stage amplification module 31; the filter module 32 may also be provided only between the first-stage amplification module 31 and the second-stage amplification module 31, or only between the second-stage amplification module 31 and the third-stage amplification module 31; the connection relationship between the filter module 32 and the two amplification modules 31 connected to itself may be in series or in parallel, that is, the filter module 32 is connected in series between the two amplification modules 31, or is connected in parallel between the two amplification modules 31 with one end grounded, and in the form of a notch filter, it can also play a role in suppressing the interference of the transmission signal on the receiving signal, and the parallel circuit method has a smaller impact on the path insertion loss of the entire RF power amplifier 3 than the series method.

[0044] It is not difficult to understand that by setting the filter module 32 between the stages of each amplification module 31 in the transmitting circuit, not only the overall transmission efficiency can be improved, but also the filter can be avoided from being placed after the final amplifier with the largest output power; the overall transmission efficiency is improved; through the collaborative design method of the filter and the RF power amplifier 3, the filter is between the stages, and together with the corresponding matching network, it helps to improve the inter-stage matching of the amplifier and further improve the linearity of the transmitted signal; the selection requirements for the filter module 32 are reduced, such as the requirements for the maximum tolerable power and insertion loss, etc.; it effectively takes into account both the improvement of transmission efficiency and the suppression of signal interference, thereby improving the accuracy and reliability of the entire RF transceiver module.

[0045] Specifically, there are many options for implementing the filter module 32. The filter module 32 can be directly built into the RF power amplifier 3, such as Figure 2 As shown, it can also be independent of the RF power amplifier 3 and connected to the amplification module 31, such as Figure 3 On the basis of setting filters between stages, a final output filter 33 can be further set at the output end of the RF power amplifier 3, as shown in FIG. Figure 4As shown, a filter is added at the output end of the final amplifier. By adopting the scheme of interstage filter + final output filter 33, the two filters at different positions cooperate with each other to better suppress interference, so that the final output filter 33 has lower requirements for out-of-band suppression. The lower suppression requirement makes it easier to achieve low insertion loss of the filter, thereby achieving lower insertion loss. Furthermore, the final output filter 33 can adopt a duplex filter, such as Figure 6 As shown, the transmission and reception isolation is further realized. For the three-stage RF power amplifier 3, only a filter located between the second-stage amplification module 31 and the third-stage amplification module 31 can be set, such as Figure 5 shown.

[0046] The utility model provides a transmitting circuit of a radio frequency transceiver module, comprising an input module 2 and a radio frequency power amplifier 3, wherein the radio frequency power amplifier 3 comprises a plurality of stages of amplifying modules 31 and a filtering module 32 arranged between any two of the amplifying modules 31, and the influence of the transmitting signal on the receiving signal is suppressed by adding the filtering module 32 in the radio frequency power amplifier 3, and the noise and spurious in the receiving frequency band are suppressed by the filtering module 32; and because the filtering module 32 is arranged between the stages of the multi-stage amplifying modules 31 of the radio frequency power amplifier 3, the insertion loss of the filter can only affect the pre-stage amplifier, while the efficiency of the final stage amplifier is not affected, thereby improving the transmission efficiency of the overall transmitting circuit; the filtering module 32 arranged between the stages can also improve the inter-stage matching of the amplifying modules 31, help to improve the linearity of the transmitting signal, reduce the selection requirements for the filtering module 32, and achieve balanced suppression of signal interference between the transmitting circuit and the receiving circuit in the radio frequency module and improvement of the transmission efficiency of the transmitting circuit.

[0047] Based on the above embodiments:

[0048] As an optional embodiment, the amplification module 31 includes an amplification device, a first inductor and a bias module, the control end of the amplification device serves as the input end of the amplification module 31 and is connected to the output end of the bias module, the first end of the amplification device is grounded, the second end is connected to the first end of the first inductor, and the second end of the first inductor is connected to the first power supply;

[0049] The bias module is used to provide a fixed bias voltage for the amplifier device.

[0050] It is not difficult to understand that the amplifier module 31 can use a power electronic device working in the amplification area as the amplifier device, and at the same time set a first inductor for impedance matching and choking, and further use the bias module to provide a fixed bias voltage for the amplifier device to ensure that the amplifier device can stably work in the amplification state; the fixed bias voltage output by the bias module can be adjusted according to the actual application requirements. The specific value of the fixed bias voltage is not particularly limited in this application. It can be selected according to the specific type of the amplifier device. By adjusting the size of the fixed bias voltage, the amplification linearity and working state of the amplifier module 31 can be adjusted. Fixed bias voltages of different sizes can realize amplifiers with different characteristics such as different power consumption and different linearity. The specific types and implementation methods of the first power supply, amplifier device, first inductor and bias module are not particularly limited in this application. The amplifier device can be implemented using power electronic devices such as transistors, such as Figure 2 , Figure 3 and Figure 4 As shown, the amplifier components are transistors Q1 and Q2, the first inductors are L1 and L1', VCC1 and VCC2 are first power supplies for the two-stage amplifier modules, and V1 and V2 are fixed bias voltages for the two-stage amplifier modules. Figure 5 and Figure 6 As shown, the amplifier components are triodes Q1, Q2 and Q3, the first inductors are L1, L1' and L1", VCC1, VCC2 and VCC3 are respectively the first power supplies of the three-stage amplification modules, and V1, V2 and V3 are respectively the fixed bias voltages of the three-stage amplification modules.

[0051] Specifically, the amplification module 31 includes an amplification device, a first inductor and a bias module. The first inductor and the bias module cooperate with each other to provide a fixed bias voltage for the amplification device, ensuring that the amplification device works stably in the required amplification state, thereby effectively realizing the amplification process of the input signal. The entire circuit structure is simple and easy to implement, which is conducive to the simple implementation of the RF power amplifier 3 and the entire RF transceiver module.

[0052] Please refer to Figure 7 , Figure 7 A schematic structural diagram of a bias module provided by the utility model; as an optional embodiment, the bias module includes a resistor Rb, a first triode Qb1, a second triode Qb2 and a third triode Qb3, the emitter of the first triode Qb1 is grounded, and the base is respectively connected to the collector of the first triode Qb1 and the emitter of the second triode Qb2, the first end of the resistor Rb is connected to a preset voltage, the second end is respectively connected to the collector of the second triode Qb2, the base of the second triode Qb2 and the base of the third triode Qb3, the collector of the third triode Qb3 is connected to a second power supply, and the emitter of the third triode Qb3 serves as the output end of the bias module.

[0053] It is not difficult to understand that the first end of the resistor Rb is connected to a preset voltage preset in advance, the resistor Rb is connected in series with the first transistor Qb1 and the second transistor Qb2, the resistor Rb plays the role of voltage division and current limiting, the first transistor Qb1 and the second transistor Qb2 play the role of voltage stabilization, the base of the second transistor Qb2 provides a stable voltage for the base of the third transistor Qb3, and by adjusting the preset voltage preset in advance, the voltage of the base of the third transistor Qb3 is adjusted, thereby controlling the third transistor Qb3 to output a fixed bias voltage of different sizes based on the second power supply. The specific value of the preset voltage, etc., is not specifically limited in this application, and the specific type and implementation method of the second power supply, the resistor Rb, the first transistor Qb1, the second transistor Qb2 and the third transistor Qb3, etc., are not specifically limited in this application. The second power supply can be implemented with the same power supply as the first power supply, or it can be implemented with a different power supply, such as Figure 7 As shown, Vbatt is the second power supply.

[0054] Specifically, the bias module includes a resistor Rb, a first transistor Qb1, a second transistor Qb2 and a third transistor Qb3. The resistor Rb, the first transistor Qb1 and the second transistor Qb2 cooperate with each other to provide a stable on-voltage for the third transistor Qb3, thereby achieving a stable output of a fixed bias voltage through the third transistor Qb3 and the second power supply, effectively realizing stable control of the amplifier device, and improving the stability and reliability of the RF power amplifier 3. The entire circuit structure is simple and easy to implement, which is conducive to the simple implementation of the RF power amplifier 3 and the entire RF transceiver module.

[0055] As an optional embodiment, the bias module further includes a first capacitor Cb, a first end of the first capacitor Cb is grounded, and a second end of the first capacitor Cb is connected to the base of the third transistor Qb3.

[0056] It is not difficult to understand that in order to further ensure the stability of the base voltage of the third transistor Qb3 and avoid the existence of misconduction and the like, a first capacitor Cb connected to the base of the third transistor Qb3 can be further provided. The first capacitor Cb can further play a role in stabilizing the voltage and stabilize the base voltage of the third transistor Qb3 and the base voltage of the second transistor Qb2. The present application does not make any special limitation on the specific type and implementation method of the first capacitor Cb.

[0057] Specifically, a first capacitor Cb can be further added to the bias module to ensure the stability of the control voltage of the base of the third transistor Qb3, effectively realize the stable control of the amplifier device, and further improve the stability and reliability of the RF power amplifier 3. The entire circuit structure is simple and easy to implement, which is conducive to the simple implementation of the RF power amplifier 3 and the entire RF transceiver module.

[0058] Please refer to Figure 8 , Figure 8 This is a schematic diagram of the structure of a matching module provided by the utility model; please refer to Fig. 9 , Fig. 9 A schematic diagram of the structure of another matching module provided for the utility model; as an optional embodiment, the transmitting circuit of the RF transceiver module also includes a first matching module and a second matching module, the first matching module is arranged between the filter module 32 and an amplifying module 31 connected to the filter module 32, and the second matching module is arranged between the filter module 32 and another amplifying module 31 connected to the filter module 32.

[0059] It is not difficult to understand that the input and output ends of the filter module 32 are not equal to the input or output ends of the connected amplification module 31, so the connection between the amplification module 31 and the filter module 32 needs to be equipped with an impedance matching module to achieve impedance matching. The filter module 32 is connected to an amplification module 31 located at the input side of the filter module 32 and another amplification module 31 located at the output side of the filter module 32, so it is necessary to respectively set a first matching module corresponding to one amplification module 31 and a second matching module corresponding to another amplification module 31. Figure 2 For example, the filter is arranged between the pre-stage and final amplifiers, there is a corresponding first matching network between the pre-stage amplifier and the filter, there is a corresponding second matching network between the filter and the final amplifier, and the filter arranged between the stages is also conducive to improving the inter-stage matching between the amplification modules 31, the input and output impedance of the filter is low impedance, about 10 ohm level, the impedance between the stages of the amplification module 31 is also a low impedance of 10 ohm level, and the final output of the RF power amplifier 3 is usually matched to 50 ohms, so the impedance between the filter and the amplification module 31 is closer, and it is easier to achieve low insertion loss matching. The specific implementation of the first matching module and the second matching module is not particularly limited in this application.

[0060] Specifically, considering the inequality between the input impedance and output impedance of the filter module 32 and the input impedance and output impedance of the amplification module 31, a first matching module and a second matching module are further provided to achieve impedance matching of the connection between the filter module 32 and the amplification module 31, thereby further improving the accuracy and reliability of the transmitting circuit, improving the quality of the transmitted signal, and ensuring the accurate operation of the entire RF transceiver module.

[0061] As an optional embodiment, the first matching module includes a second capacitor C2 and a second inductor L2, a first end of the second capacitor C2 is connected to a second end of an amplifier device of an amplifier module 31, a second end is respectively connected to a first end of the second inductor L2 and an input end of the filter module 32, and a second end of the second inductor L2 is grounded;

[0062] The second matching module includes a third capacitor C3 and a third inductor L3, the first end of the third capacitor C3 is respectively connected to the first end of the third inductor L3 and the output end of the filtering module 32, the second end of the third inductor L3 is grounded, and the second end of the third capacitor C3 is connected to the control end of the amplifier device of another amplifier module 31.

[0063] It is not difficult to understand that the difference between the input impedance of the filter module 32 and the output impedance of one amplification module 31, and the output impedance of the filter module 32 and the input impedance of another amplification module 31 is small, so the first matching module and the second matching module can be realized by a simple impedance matching circuit composed of capacitors and inductors. The first matching module and the second matching module are symmetrical about the filter structure, which can effectively realize the impedance matching process of the input impedance of the filter module 32 and the output impedance of one amplification module 31, and the output impedance of the filter module 32 and the input impedance of another amplification module 31. The specific types and implementation methods of the second capacitor C2, the second inductor L2, the third capacitor C3 and the third inductor L3 are not particularly limited in this application. Matching circuits are also required to be set between the amplification modules, the input side of the first-stage amplifier and the output side of the final-stage amplifier for impedance matching. The specific circuits and implementation methods of the matching circuits are not particularly limited in this application, and can be set with reference to the implementation methods of the first matching module and the second matching module.

[0064] Specifically, an impedance matching circuit composed of simple capacitors and inductors can be used to implement the first matching module and the second matching module respectively, which can effectively realize the impedance matching process and further improve the quality of the transmitted signal and the accuracy of the transmitting circuit. The entire circuit structure is simple and easy to implement, which is conducive to the simple implementation of the RF power amplifier 3 and the entire RF transceiver module.

[0065] Please refer to Fig.10 , Fig.10A structural schematic diagram of a multi-frequency RF power amplifier provided by the utility model; as an optional embodiment, the filtering module 32 includes several filters of different frequency bands, and the transmitting circuit of the RF transceiver module also includes a first switching switch K1 and a second switching switch K2, the fixed end of the first switching switch K1 is connected to the output end of an amplification module 31, and several switching ends are respectively connected to the input ends of several filters of different frequency bands in a one-to-one correspondence, and several switching ends of the second switching switch K2 are respectively connected to the output ends of several filters of different frequency bands in a one-to-one correspondence, and the fixed end is connected to the input end of another amplification module 31.

[0066] In practical applications, most RF transceiver modules need to support multi-mode and multi-frequency functions. Multi-mode and multi-frequency are to allow the same terminal to switch between different modes and frequency bands, and to support working modes of different modes and frequency bands. Moreover, the specific working frequency bands supported by different operators in different regions are different. Therefore, the RF transceiver module supporting multi-mode and multi-frequency is more flexible and has a wider range of applications. Therefore, the corresponding filter module 32 needs to be provided with multiple filters of different frequency bands to meet the normal working process under the working modes of different frequency bands. At this time, it is necessary to add a first switching switch K1 and a second switching switch K2. The first switching switch K1 and the second switching switch K2 play the role of switching each filter. According to the different working modes, the corresponding filters of different frequency bands are connected to the RF power amplifier 3 to accurately filter out the interference signal. The application does not make any special restrictions on the specific frequency band values ​​of each filter, and the application does not make any special restrictions on the specific types and implementation methods of the first switching switch K1 and the second switching switch K2.

[0067] Specifically, a plurality of filters of different frequency bands are arranged in the filter module 32, and a first switching switch K1 on the input side of the filter module 32 and a second switching switch K2 on the output side of the filter module 32 are additionally arranged, so that filters of different frequency bands can be connected to the RF power amplifier 3, thereby further meeting the requirements of the RF transceiver module for multi-mode and multi-frequency functions, improving the flexibility of the entire RF transceiver module, and expanding the scope of application of the entire RF transceiver module.

[0068] Please refer to Fig.11 , Fig.11 A schematic diagram of the structure of a radio frequency transceiver module provided by the utility model. To solve the above technical problems, the utility model also provides a radio frequency transceiver module, including an antenna, a receiving circuit and a transmitting circuit of the radio frequency transceiver module as described above, wherein the input end of the antenna is connected to the output end of the transmitting circuit of the radio frequency transceiver module, and the output end is connected to the input end of the receiving circuit.

[0069] It should be noted that the RF transceiver module not only needs to transmit the RF signal through the transmitting circuit, but also needs to set up a receiving circuit to realize the receiving process of the RF signal. At the same time, the transmission and reception of the RF signal need to be realized by using an antenna or other types of signal transmitting devices and signal receiving devices. The specific types and implementation methods of the antenna and the receiving circuit are not particularly limited in this application. In order to meet the requirements of multi-mode and multi-frequency, multiple RF power amplifiers 3 can also be set in the transmitting circuit of the RF transceiver module, such as Fig.11 As shown, three groups of RF power amplifiers 3, HB1-HB, are respectively provided for high frequency band (HB), middle frequency band (MB) and low frequency band (LB). n 、MB1-MB n , LB1-LB n They represent signals in different frequency bands respectively, RX represents the received signal, and TX represents the transmitted signal.

[0070] For an introduction to a radio frequency transceiver module provided by the present invention, please refer to the embodiment of the transmitting circuit of the radio frequency transceiver module described above, and the present invention will not be described in detail here.

[0071] As an optional embodiment, the receiving circuit includes a receiving filter, a receiving amplifier and an output module, the input end of the receiving filter is connected to the output end of the antenna, the input end of the receiving amplifier is connected to the output end of the receiving filter, and the output end is connected to the input end of the output module.

[0072] Considering that there may be stray signals such as noise in the received signal received from the antenna, a receiving filter is set in the receiving circuit to improve the accuracy of the received signal, and a receiving amplifier is also set to amplify the received signal, and then the output module outputs the amplified received signal to the next-level signal processing module. The specific types and implementation methods of the receiving filter, receiving amplifier and output module are not particularly limited in this application.

[0073] As an optional embodiment, the RF transceiver module also includes a transmission frequency band selection switch, a reception frequency band selection switch and an antenna switch, the fixed end of the transmission frequency band selection switch is connected to the output end of the RF power amplifier 3, the fixed end of the antenna switch is connected to the input end of the antenna, the switching end is respectively connected to the switching end of the transmission frequency band selection switch and the switching end of the reception frequency band selection switch, and the fixed end of the reception frequency band selection switch is connected to the input end of the receiving circuit.

[0074] It is not difficult to understand that for a RF transceiver module that supports multi-mode and multi-frequency, it also includes a transmit frequency band selection switch, a receive frequency band selection switch and an antenna switch. The transmit frequency band selection switch can switch to select transmit signals of different frequency bands to output to the antenna, and the receive frequency band selection switch can switch to select receive signals of different frequency bands. The antenna switch selects and switches the corresponding frequency band accordingly, thereby transmitting the transmit signal of the corresponding frequency band received from the transmit circuit or outputting the receive signal of the corresponding frequency band to the receive circuit. Figure 8 As shown, the complex RF transceiver module includes a multi-frequency multi-mode transmitting RF power amplifier 3, a receiving low-noise signal amplifier, a transceiver switching switch, a frequency band filter, etc. The transmitting filter, that is, the filter module 32 set for the RF power amplifier 3, is moved to the input end of the final amplifier module 31 of the RF power amplifier 3; wherein the signal flow in the transmitting circuit is as follows: the transmitting signal is input from the signal source 1, amplified by the RF power amplifier 3 and filtered by the filter module 32, the transmitting frequency band selection switch switches the frequency band, and the antenna switch switches and selects the output to the antenna, and the signal flow in the receiving circuit is as follows: the antenna is output to the receiving filter of each frequency band after the antenna switch switches and selects, and the signal is output to the next level signal processing module after amplification by the receiving low-noise amplifier.

[0075] Specifically, for RF transceiver modules that support multi-mode and multi-frequency, it is necessary to add a frequency band selection switch to realize the selection and switching of the transmission and reception processes of different frequency bands, further improve the flexibility of the entire RF transceiver module, and expand the scope of application of the entire RF transceiver module.

[0076] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0077] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0078] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transmitting circuit of a radio frequency transceiver module, characterized in that: include: An input module, the input end of which is connected to a signal source and is used to receive an input signal to be transmitted; A radio frequency power amplifier, whose input end is connected to the output end of the input module and is used to amplify the input signal; Wherein, the radio frequency power amplifier comprises: Several stages of amplification modules and filtering modules are arranged between any two amplification modules, and the amplification modules of several stages are connected in series in sequence.

2. The transmitting circuit of the radio frequency transceiver module according to claim 1, characterized in that: The amplification module comprises an amplification device, a first inductor and a bias module, the control end of the amplification device serves as the input end of the amplification module and is connected to the output end of the bias module, the first end of the amplification device is grounded, the second end is connected to the first end of the first inductor, and the second end of the first inductor is connected to the first power supply; The bias module is used to provide a fixed bias voltage for the amplifier device.

3. The transmitting circuit of the radio frequency transceiver module according to claim 2, characterized in that: The bias module includes a resistor, a first triode, a second triode and a third triode. The emitter of the first triode is grounded, and the base is respectively connected to the collector of the first triode and the emitter of the second triode. The first end of the resistor is connected to a preset voltage, and the second end is respectively connected to the collector of the second triode, the base of the second triode and the base of the third triode. The collector of the third triode is connected to a second power supply, and the emitter of the third triode serves as the output end of the bias module.

4. The transmitting circuit of the radio frequency transceiver module according to claim 3, characterized in that: The bias module further includes a first capacitor, a first end of which is grounded, and a second end of which is connected to the base of the third transistor.

5. The transmitting circuit of the radio frequency transceiver module according to claim 2, characterized in that: The transmitting circuit of the RF transceiver module also includes a first matching module and a second matching module. The first matching module is arranged between the filter module and an amplifying module connected to the filter module, and the second matching module is arranged between the filter module and another amplifying module connected to the filter module.

6. The transmitting circuit of the radio frequency transceiver module according to claim 5, characterized in that: The first matching module includes a second capacitor and a second inductor, wherein a first end of the second capacitor is connected to a second end of an amplifying device of the amplifying module, a second end is respectively connected to a first end of the second inductor and an input end of the filtering module, and a second end of the second inductor is grounded; The second matching module includes a third capacitor and a third inductor, the first end of the third capacitor is respectively connected to the first end of the third inductor and the output end of the filtering module, the second end of the third inductor is grounded, and the second end of the third capacitor is connected to the control end of the amplifier device of another amplifier module.

7. The transmitting circuit of the radio frequency transceiver module according to any one of claims 1 to 6, characterized in that: The filtering module includes several filters of different frequency bands, and the transmitting circuit of the RF transceiver module also includes a first switching switch and a second switching switch. The fixed end of the first switching switch is connected to the output end of an amplification module, and the several switching ends are respectively connected to the input ends of several filters of different frequency bands in a one-to-one correspondence. The several switching ends of the second switching switch are respectively connected to the output ends of several filters of different frequency bands in a one-to-one correspondence, and the fixed end is connected to the input end of another amplification module.

8. A radio frequency transceiver module, characterized in that: It comprises an antenna, a receiving circuit and a transmitting circuit of the radio frequency transceiver module as described in any one of claims 1 to 7, wherein the input end of the antenna is connected to the output end of the transmitting circuit of the radio frequency transceiver module, and the output end is connected to the input end of the receiving circuit.

9. The radio frequency transceiver module according to claim 8, characterized in that: The receiving circuit includes a receiving filter, a receiving amplifier and an output module. The input end of the receiving filter is connected to the output end of the antenna, the input end of the receiving amplifier is connected to the output end of the receiving filter, and the output end is connected to the input end of the output module.

10. The radio frequency transceiver module according to claim 8, characterized in that: The RF transceiver module also includes a transmission frequency band selection switch, a reception frequency band selection switch and an antenna switch. The fixed end of the transmission frequency band selection switch is connected to the output end of the RF power amplifier, the fixed end of the antenna switch is connected to the input end of the antenna, the switching end is respectively connected to the switching end of the transmission frequency band selection switch and the switching end of the reception frequency band selection switch, and the fixed end of the reception frequency band selection switch is connected to the input end of the receiving circuit.

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