Differential signal transceiving processing circuit and multi-channel radio frequency front-end transceiving system

Abstract

The application discloses a differential signal transceiving processing circuit and a multi-channel radio frequency front-end transceiving system. The differential signal transceiving processing circuit comprises a transformer, which comprises at least one set of primary coils and secondary coils corresponding to a radio frequency channel; at least one impedance transformation module, one end of the impedance transformation module being connected with a secondary coil arranged in the same radio frequency channel; at least one differential port, the differential port being used for interacting with differential signals equally divided by different impedance transformation modules; and at least one isolation module, the isolation module being connected between different impedance transformation modules in an interleaved mode, and the isolation module being used for isolating differential signals between different radio frequency channels. The technical scheme of the application utilizes limited area to enable the overall structure to eliminate common-mode signals between different radio frequency channels in the process of realizing power synthesis / distribution, generate equally divided differential signals, and have the advantages of high isolation, high balance and good matching.

Description

Technical Field

[0001] This application relates to the field of radio frequency circuit technology, and in particular to a differential signal transceiver processing circuit and a multi-channel radio frequency front-end transceiver system. Background Technology

[0002] In recent years, radar technology has developed rapidly, and multi-channel RF transceiver components have been widely used in the front end of RF transceivers. On the one hand, as the types of signals transmitted in the RF channels continue to increase and the integration level continues to improve, the compact layout leads to isolation issues between RF channels. On the other hand, differential traces are often used in circuits because they have higher noise immunity and anti-interference capabilities compared to single-ended traces. However, the amplitude and phase imbalance of differential signals can introduce nonlinearity into the link, which has a direct impact on the performance of the RF system.

[0003] Currently, traditional transformer structures can only solve one of the problems. For example, the Wilkinson structure only solves the isolation problem, and the multi-balun structure only solves the balance problem. Both have limited functions and occupy a large area. Therefore, improving the isolation of differential signals between RF channels while ensuring their balance using a smaller area is of great significance for multi-channel RF transceiver systems. Summary of the Invention

[0004] The main objective of this application is to provide a differential signal transceiver processing circuit and a multi-channel RF front-end transceiver system, which aims to utilize a limited area to enable the overall structure of the transformer to achieve advantages such as high isolation, high balance, and good matching during the synthesis / distribution process.

[0005] To achieve the above objectives, this application proposes a differential signal transceiver processing circuit for power combining or power distribution of differential signals. The differential signal transceiver processing circuit includes: A transformer, the transformer comprising at least one set of primary coils and secondary coils corresponding to a radio frequency channel; At least one impedance transformation module, one end of which is connected to a secondary coil disposed in the same radio frequency channel; At least one differential port, said differential port being used to interact with equally distributed differential signals from different impedance transformation modules; At least one isolation module is interleaved between different impedance transformation modules, and the isolation module is used to isolate differential signals between different radio frequency channels.

[0006] Optionally, the transformer is a power combiner used to receive and fuse multiple equally divided differential signals through the radio frequency channel.

[0007] Optionally, the transformer is a power divider used to eliminate common-mode signals through the radio frequency channel to distribute equally distributed differential signals to multiple differential ports.

[0008] Optionally, the transformer is a one-to-many transformer, wherein the primary coils of the one-to-many transformer are connected in series.

[0009] Optionally, the impedance transformation module includes: A positive impedance transformation unit, one end of which is connected to one end of a secondary coil disposed in the same radio frequency channel, is used to adjust the impedance to a conjugate state. A negative impedance transformation unit, one end of which is connected to the other end of a secondary coil disposed in the same radio frequency channel, is used to adjust the impedance to a conjugate state.

[0010] Optionally, the impedance transformation module is a transmission line structure or a lumped element.

[0011] Optionally, the differential port includes: The differential positive electrode is connected to the other end of the two positive impedance transformation units, and the differential positive electrode is used to interact with the differential signal equally shared by the two positive impedance transformation units. The differential negative terminal is connected to the other end of the two negative impedance transformation units. The differential negative terminal is used to interact with the differential signal that is evenly distributed between the two negative impedance transformation units.

[0012] Optionally, the number of differential ports and the number of impedance transformation modules are N, where N is a positive integer power of 2; The first differential port is connected to the N / 2-1th and N / 2th impedance transformation modules, and the Nth differential port is connected to the N / 2-1th and N / 2th impedance transformation modules. The N / 2-1 differential port is connected to the first impedance transformation module and the Nth impedance transformation module, and the N / 2 differential port is connected to the first impedance transformation module and the Nth impedance transformation module.

[0013] Optionally, one of the isolation modules, two of the positive impedance transformation units, and one of the differential positive terminals are connected in sequence to form a Wilkinson structure between each of the radio frequency channels; An isolation module, two negative impedance transformation units, and a differential negative terminal are connected in sequence to form a Wilkinson structure between each of the radio frequency channels.

[0014] Optionally, the isolation module is composed of a resistor and a capacitor connected in parallel.

[0015] Optionally, the number of primary coils, the number of secondary coils, the number of RF channels, the number of impedance transformation modules, the number of differential ports, and the number of isolation modules are all positive integer powers of 2.

[0016] To achieve the above objectives, this application also proposes a multi-channel radio frequency front-end transceiver system, which includes the differential signal transceiver processing circuit described above, and will not be repeated here.

[0017] The technical solution of this application comprises a differential signal transceiver processing circuit consisting of a transformer, at least one impedance transformation module, at least one differential port, and at least one isolation module. In this circuit, the transformer includes at least one set of primary and secondary coils corresponding to the RF channels. One end of the impedance transformation module is connected to the secondary coil located in the same RF channel. The differential port is used to exchange differential signals equally with different impedance transformation modules. The isolation modules are interleaved between different impedance transformation modules to isolate differential signals between different RF channels. Thus, the differential signal transceiver processing circuit can connect differential signals to the impedance transformation modules through a symmetrical connection. The impedance transformation modules are connected to the isolation modules in pairs, forming a Wilkinson structure between multiple RF channels. Utilizing a limited area, the overall structure achieves high isolation, high balance, and good matching during power combining / distribution, reducing system losses and overcoming the technical defects of traditional structures in the prior art, such as large area occupation and limited functionality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a functional block diagram of an embodiment of the differential signal transceiver processing circuit in this application; Figure 2 This is a schematic diagram of the structure of an embodiment of the differential signal transceiver processing circuit in this application; Figure 3 This is a schematic diagram of another embodiment of the differential signal transceiver processing circuit in this application; Figure 4 Based on this application Figure 3 A partial structural diagram obtained after disassembling the differential signal transceiver processing circuit in the image; Figure 5 Based on this application Figure 3 A partial structural diagram obtained after disassembling the differential signal transceiver processing circuit in the image; Figure 6 This is a schematic diagram of another embodiment of the differential signal transceiver processing circuit in this application; Figure 7 Based on this application Figure 6 A schematic diagram illustrating the application scenario of parameter simulation configuration for the differential signal transceiver processing circuit in the circuit. Figure 8 This is a schematic diagram illustrating an application scenario of an embodiment of the differential signal transceiver processing circuit in this application; Figure 9 This is a schematic diagram illustrating another application scenario of an embodiment of the differential signal transceiver processing circuit in this application; Figure 10 This is a schematic diagram of the structure of an embodiment of the multi-channel radio frequency front-end transceiver system in this application.

[0020] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0021] Explanation of icon numbers: Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0025] In recent years, radar technology has developed rapidly, and multi-channel RF transceiver components have been widely used in the front-end of RF transceivers. With the increasing variety of signals transmitted in RF channels and the continuous improvement in integration, the compact layout makes RF signals highly susceptible to energy leakage and coupling effects, affecting the normal operation of the system. On the other hand, differential traces are often used in circuits because they have higher noise immunity and anti-interference capabilities compared to single-ended traces. However, the amplitude and phase imbalance of differential signals can introduce nonlinearity into the link, generating even-order harmonic distortion and increasing common-mode noise, directly impacting the performance of the RF system. Therefore, improving the isolation and balance of differential signals between channels simultaneously within a smaller area is of great significance for multi-channel RF transceiver systems. Traditional structures can only solve one of these problems; for example, the Wilkinson structure solves the isolation problem, and the multi-balun structure solves the balance problem. These structures are functionally limited and occupy a large area. The following problems need to be solved within the current technological framework: 1. Traditional high-balance structures are not power-sharing structures, making it difficult to achieve low-loss equal distribution during the synthesis / distribution process. High losses can lead to reduced system performance, while uneven distribution can worsen the balance. 2. Traditional high-isolation power combiners / distributors offer no improvement in balance. 3. Traditional high-balance structure channels have no isolation, which introduces crosstalk and generates noise that cannot be eliminated during signal synthesis / distribution. 4. Traditional high-balance structures are complex, have limited functions, and occupy a large area.

[0026] Based on this, this application proposes a differential signal transceiver processing circuit and a multi-channel RF front-end transceiver system. The differential signal transceiver processing circuit is composed of at least one impedance transformation module, at least one differential port, and at least one isolation module. In this circuit, the transformer includes at least one set of primary and secondary coils corresponding to the RF channels. One end of the impedance transformation module is connected to the secondary coil located in the same RF channel. The differential port is used to exchange differential signals equally distributed with different impedance transformation modules. The isolation modules are interleaved between different impedance transformation modules to isolate differential signals between different RF channels. Thus, the differential signal transceiver processing circuit can connect differential signals to the impedance transformation modules through a symmetrical connection. The impedance transformation modules are connected to the isolation modules in pairs, forming a Wilkinson structure between multiple RF channels. Utilizing a limited area, the overall structure achieves high isolation, high balance, and good matching during power combining / distribution, reducing system losses and overcoming the technical defects of large area occupation and single function in traditional structures in the prior art.

[0027] This application provides a differential signal transceiver processing circuit and a multi-channel RF front-end transceiver system, which will be specifically described through the following embodiments. First, the differential signal transceiver processing circuit in this application embodiment is described. In one embodiment of this application, the differential signal transceiver processing circuit includes multiple RF channels, a transformer, an impedance transformation module, multiple differential ports, and an isolation module.

[0028] As an example, refer to Figure 1 and Figure 2 In this embodiment, the differential signal transceiver processing circuit consists of a transformer 20, an impedance transformation module 30, a differential port 40, and an isolation module 50.

[0029] The transformer 20 includes at least one set of primary coil 201 and secondary coil 202 corresponding to the RF channel 10; one end of the impedance transformation module 30 is connected to the secondary coil 202 disposed in the same RF channel 10, and the other end of the impedance transformation module 30 is connected to the differential port 40; the differential port 40 is used to interact with the differential signals equally distributed by different impedance transformation modules 30; the isolation module 50 is interleaved between different impedance transformation modules 30, and the isolation module 50 is used to isolate the differential signals between different RF channels 10.

[0030] It should be noted that in the differential signal transceiver processing circuit provided in this embodiment, there can be multiple radio frequency channels 10. Each radio frequency channel 10 is provided with a secondary coil 202, and the transformer 20 can be a pair of multiple transformers. This pair of multiple transformers can support power combining or power distribution of multiple radio frequency channels 10. The pair of multiple transformers includes multiple pairs of primary coils 201 and secondary coils 202. The number of secondary coils 202 is the same as the number of radio frequency channels 10. Correspondingly, the number of primary coils 201 is also the same as the number of radio frequency channels 10, and the primary coils 201 are connected in series. Figure 1 and Figure 2 In each RF channel 10, the secondary coil 202 is located to the right. The voltage polarity of each secondary coil 202 is opposite to that of the primary coil 201. In addition to the secondary coil 202, each RF channel 10 also includes an impedance transformation module 30. The number of impedance transformation modules 30 is the same as the number of RF channels 10. The impedance transformation module 30 consists of an impedance transformation network used to improve impedance matching. This is because good impedance matching can reduce losses. Figure 1 and Figure 2 It can be seen that one end of the impedance transformation module 30 in the RF channel 10 is connected to the secondary coil 202 disposed in the same RF channel 10, and the other end is connected to two differential ports 40; the number of differential ports 40 is also consistent with the number of RF channels 10, that is, if there are 2 RF channels, there are 2 differential ports, and if there are 8 RF channels, there are 8 differential ports; the number of isolation modules 50 is consistent with the number of differential ports 40, and each isolation module 50 is interleaved between two impedance transformation modules 30, that is, disposed between two RF channels 10, which can significantly improve the isolation between each RF channel 10.

[0031] As an example, transformer 20 is a power combiner used to receive and fuse multiple equally divided differential signals via radio frequency channel 10. Combination Figure 1 and Figure 2 From the positive direction (viewed from left to right in the figure), the differential signals transmitted by different differential ports 40 through different radio frequency channels 10 are converted into multiple identical and equally divided differential signals when they reach the power combining transformer (transformer 20 is the power combining transformer when viewed from left to right in the figure) through the impedance transformation module 30, thereby improving the amplitude and phase balance of the differential signals.

[0032] Furthermore, this embodiment can also be combined with Figure 3 To understand, Figure 3 This diagram illustrates a structure where a differential port is connected to two RF channels. Figure 1 and Figure 2 From a positive perspective, in Figure 3 In this circuit, Port1 corresponds to differential port 40, Port2 corresponds to the signal terminal of transformer 20, and two impedance transformation networks connected to the same port correspond to an impedance transformation module 30. At this time, the differential signal transceiver processing circuit acts as a power combiner, which can significantly improve the phase and amplitude imbalance of the differential signal.

[0033] Furthermore, Figure 3 After disassembly, the following can be obtained Figure 4 and Figure 5 The structure shown in this embodiment is combined with Figure 3 , 4 1. Analyze the isolation between 5 pairs of radio frequency channels, first... Figure 3 The structure of a pair of two transformers was disassembled to obtain, as follows Figure 4 The structure shown is further disassembled by taking the positive and negative signal terminals of Port1 and obtaining the following... Figure 5 As shown in the structure, each differential port is obviously connected to the impedance transformation module 30 through a centrally symmetrical connecting line. The RC isolation network that is cross-connected between the impedance transformation modules 30 ensures that the output signal of each differential port passes through a Wilkinson structure. This ensures strict equalization and good isolation during both power distribution and power combining, preventing any crosstalk between RF channels from introducing noise.

[0034] As an example, transformer 20 is a power divider used to eliminate common-mode signals through RF channel 10 to distribute equally distributed differential signals to multiple differential ports 40.

[0035] Combination Figure 1 and Figure 2 Looking from the reverse (from right to left in the diagram), with one end of transformer 20 grounded, transformer 20 functions as a power distribution transformer (when viewed from right to left in the diagram, transformer 20 functions as a power distribution transformer). This differential signal transceiver processing circuit can be considered as a high-isolation, high-balance single-ended to differential balun structure. After the output signal of transformer 20 is transmitted through RF channel 10, it can eliminate the common-mode current caused by the imbalance generated during the transmission of differential signals, so that the signals arriving at each differential port 40 are evenly distributed differential signals.

[0036] Furthermore, this embodiment can also be combined with Figure 6 To understand, Figure 6 This diagram illustrates a structure where a differential port is connected to two RF channels. Figure 1 and Figure 2 Looking at it from the reverse perspective, Figure 6In this circuit, one end of transformer 20 is grounded, Port1 corresponds to the signal terminal of transformer 20, Port2 corresponds to differential port 40, and the two impedance transformation networks connected to the same port correspond to impedance transformation module 30. At this time, the differential signal transceiver processing circuit can be regarded as a single-ended to differential balun structure with high isolation and high balance.

[0037] Furthermore, based on Figure 6 By performing parameter simulation settings, we can obtain Figure 7 This embodiment combines Figure 7 The balance between RF channels is analyzed. Ia+bIa represents the positive input signal current of differential port Port1, and -Ia+bIa represents the negative input signal current of differential port1. Ia represents the differential current, which is the signal required in differential transmission, and bIa represents the common-mode current caused by the imbalance generated by the differential signal during transmission, which is the interference signal in differential transmission. The magnitude of the common-mode current is related to the signal magnitude, and the coefficient is represented by b. First, let's analyze the positive signal at Port1. It is transmitted to the upper secondary coil via the upper primary coil of the dual-phase transformer. The positive terminal of the upper secondary coil receives a signal of 1 / 2(Ia + bIa), and the negative terminal receives a signal of -1 / 2(Ia + bIa). For the negative signal at Port1, it is transmitted to the lower secondary coil via the lower primary coil of the dual-phase transformer. The positive terminal of the lower secondary coil receives a signal of -1 / 2(-Ia + bIa), and the negative terminal receives a signal of 1 / 2(-Ia + bIa). After cross-addition, the calculation is as follows: 1 / 2(Ia+bIa)+-1 / 2(-Ia+bIa)=Ia; -1 / 2(Ia+bIa)+1 / 2(-Ia+bIa)=-Ia; The Ia signal is obtained at the positive terminal of Port2, and the -Ia signal is obtained at the negative terminal of Port2. The common-mode signal is eliminated. Obviously, this structure can make the originally poorly balanced signal with common mode become highly balanced.

[0038] As an example, the impedance transformation module 30 includes: a positive impedance transformation unit 301, one end of which is connected to one end of a secondary coil 202 disposed in the same RF channel 10, and the positive impedance transformation unit 301 is used to adjust the impedance to a conjugate state; and a negative impedance transformation unit 302, one end of which is connected to the other end of a secondary coil 202 disposed in the same RF channel 10, and the negative impedance transformation unit 302 is used to adjust the impedance to a conjugate state.

[0039] In this embodiment, refer to Figure 1 and Figure 2In the same RF channel 10, the positive impedance transformation unit 301 is located above the RF channel 10 and is connected to the upper port (i.e. the end with the black dot) of the secondary coil 202 located in the same RF channel 10; the negative impedance transformation unit 302 is located below the RF channel 10 and is connected to the lower port of the secondary coil 202 located in the same RF channel 10.

[0040] As an example, the impedance transformation module 30, the positive impedance transformation unit 301, and the negative impedance transformation unit 302 are not limited to being configured as transmission line structures, but can also be configured as LC lumped elements, and can be applied to RF chips and RF board-level circuits.

[0041] As an example, refer to Figure 2 The differential port includes: a differential positive terminal, which is connected to the other end of two positive impedance transformation units and is used to interact with the differential signal equally shared by the two positive impedance transformation units; and a differential negative terminal, which is connected to the other end of two negative impedance transformation units and is used to interact with the differential signal equally shared by the two negative impedance transformation units.

[0042] Understandable, Figure 2 In the differential port 40, the position marked with "+" is the differential positive terminal, and the position marked with "-" is the differential negative terminal. Each differential positive and differential negative terminal is connected to two impedance transformation modules 30 respectively, that is, each differential port 40 is connected to two RF channels 10 respectively.

[0043] As can be seen from the above embodiments, the differential positive terminal is connected to the other end of two positive impedance transformation units 301 that do not belong to the same impedance transformation module 30. "The other end" means that it is not the same end as the end where the positive impedance transformation unit 301 is connected to the secondary coil 202. The differential negative terminal is connected to the other end of two negative impedance transformation units 302 that do not belong to the same impedance transformation module 30. "The other end" means that it is not the same end as the end where the negative impedance transformation unit 302 is connected to the secondary coil 202.

[0044] As an example, the number of differential ports 40 and the number of impedance transformation modules 30 are N, where N is a positive integer power of 2; the first differential port is connected to the N / 2-1th and N / 2th impedance transformation modules, the Nth differential port is connected to the N / 2-1th and N / 2th impedance transformation modules; the N / 2-1th differential port is connected to the first and Nth impedance transformation modules, and the N / 2th differential port is connected to the first and Nth impedance transformation modules.

[0045] It should be noted that the differential signal transceiver processing circuit proposed in this application can be applied to the power combining or distribution of N differential signals, where N must be an integer power of 2, such as 2, 4, 8, 16, ..., 2 N Wait a minute. It's particularly important to note that the connection between the differential port 40 and the impedance transformation module 30 is a top-to-bottom symmetrical connection. This top-to-bottom symmetrical connection means that two differential ports located at the edge need to connect to two RF channels located in the middle. Assuming there are differential ports 1, 2, 3, and 4 from top to bottom, and corresponding RF channels 1, 2, 3, and 4, the connection relationship is as follows: differential ports 1 and 4 are connected to the impedance transformation modules in RF channels 2 and 3, respectively; and differential ports 2 and 3 are connected to the impedance transformation modules in RF channels 1 and 4, respectively. In this way, the connection distance between each differential port 40 and the impedance transformation module in the RF channel 10 is consistent, thus ensuring the balance of the differential signals input or output from different differential ports 40.

[0046] As an example, when N=2, such as Figure 8 As shown, from a forward perspective, this structure can significantly improve the phase and amplitude imbalance of differential signals while maintaining high isolation between the two input channels. From a reverse perspective, this structure is a highly balanced and channel-isolated dual power divider.

[0047] As an example, when N=4, such as Figure 9 As shown (the connections from the second differential port Port2 and the third differential port Port3 to the impedance transformation network are omitted here; Port5 is the signal terminal of the transformer), the differential signals of the four differential ports must be connected symmetrically to the impedance transformation network, i.e., the differential signals of the first differential port Port1 and the fourth differential port Port4 need to be connected to the impedance transformation networks corresponding to the second and third RF channels, and the differential signals of the second differential port Port2 and the third differential port Port3 need to be connected to the impedance transformation networks corresponding to the first and fourth RF channels, to ensure high amplitude and phase balance of the signals. Viewed from the forward and reverse directions, this structure represents a high-isolation, high-balance 4-channel power combiner and power divider, respectively.

[0048] As an example, when the number of RF channels 10 is expanded to N channels, the schematic diagram of this structure is as follows: Figure 2 As shown (partial wiring between differential ports and impedance transformation modules is omitted), because different channels of differential signals need to be symmetrically connected to the impedance transformation network at the top and bottom centers, N must be an integer power of 2. Viewed from the forward and reverse directions, this structure represents a high-isolation, high-balance N-channel power combiner and power divider, respectively.

[0049] As an example, refer to Figure 2 An isolation module 50, two positive impedance transformation units 301 and a differential port 40 are connected in sequence to form a Wilkinson structure between each RF channel 10; an isolation module 50, two negative impedance transformation units 302 and a differential port 40 are connected in sequence to form a Wilkinson structure between each RF channel 10.

[0050] In this embodiment, by connecting the differential port 40 symmetrically to the impedance transformation module 30 at the top and bottom, forming a Wilkinson structure with high isolation through the bridging RC isolation network (i.e., isolation module 50), and then outputting through a one-to-many transformer 20, a differential signal with high isolation and high balance can be obtained.

[0051] As an example, the isolation module 50 consists of a resistor R and a capacitor C connected in parallel.

[0052] As an example, the number of primary coils 201, secondary coils 202, RF channels 10, impedance transformation modules 30, differential ports 40, and isolation modules 50 are all the same, all being positive integer powers of 2.

[0053] This application proposes a differential signal transceiver processing circuit that employs a low-loss power divider structure for equal distribution / combination with highly isolated channels. This ensures that the balance is not affected during equal combination or distribution, and the high isolation and high balance complement each other, solving the crosstalk problems introduced by high loss, uneven distribution, and lack of channel isolation. The centrally symmetrical connecting lines and RC isolation network in this differential signal transceiver processing circuit occupy virtually no area, while the impedance transformation network is an essential component of any structure requiring impedance matching. A one-to-many transformer is also indispensable for combiners / splitters. Therefore, this circuit does not increase the area compared to traditional power combining / distribution transformers, achieving combining / power dividing functions with a very small area while improving performance in terms of loss, isolation, and balance. This solves the problems of large area occupation and limited functionality of transformer structures in existing technologies.

[0054] In addition, this application also provides a multi-channel radio frequency front-end transceiver system, referring to... Figure 10 The multi-channel radio frequency front-end transceiver system includes the differential signal transceiver processing circuit described above. It is understood that since the differential signal transceiver processing circuit is used in the multi-channel radio frequency front-end transceiver system, the embodiments of the multi-channel radio frequency front-end transceiver system include all the technical solutions of all embodiments of the differential signal transceiver processing circuit described above, and the technical effects achieved are exactly the same, so they will not be repeated here.

[0055] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the content of this application's specification and drawings under the concept of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A differential signal transceiver processing circuit for power combining or power distribution of differential signals, characterized in that, The differential signal transceiver processing circuit includes: A transformer, the transformer comprising at least one set of primary coils and secondary coils corresponding to a radio frequency channel; At least one impedance transformation module, one end of which is connected to a secondary coil disposed in the same radio frequency channel; At least one differential port is provided for interacting with different impedance transformation modules to share differential signals. The number of impedance transformation modules and the number of differential ports are integer multiples of 2. The differential ports are connected to the corresponding impedance transformation modules in a top-bottom symmetrical manner so that the distance between the differential ports and the corresponding impedance transformation modules is the same. At least one isolation module is provided, which is interleaved between different impedance transformation modules and connected to the secondary coil of the transformer. The isolation module is used to isolate differential signals between different radio frequency channels.

2. The differential signal transceiver processing circuit as described in claim 1, characterized in that, The transformer is a power combiner used to receive and fuse multiple equally divided differential signals through the radio frequency channel.

3. The differential signal transceiver processing circuit as described in claim 1, characterized in that, The transformer is a power divider used to eliminate common-mode signals through the radio frequency channel to distribute equally distributed differential signals to multiple differential ports.

4. The differential signal transceiver processing circuit as described in claim 1, characterized in that, The transformer is a one-to-many transformer, and the primary coils of the one-to-many transformer are connected in series.

5. The differential signal transceiver processing circuit as described in claim 1, characterized in that, The impedance transformation module includes: A positive impedance transformation unit, one end of which is connected to one end of a secondary coil disposed in the same radio frequency channel, is used to adjust the impedance to a conjugate state. A negative impedance transformation unit, one end of which is connected to the other end of a secondary coil disposed in the same radio frequency channel, is used to adjust the impedance to a conjugate state.

6. The differential signal transceiver processing circuit as described in claim 1 or 5, characterized in that, The impedance transformation module is a transmission line structure or a lumped element.

7. The differential signal transceiver processing circuit as described in claim 5, characterized in that, The differential port includes: The differential positive electrode is connected to the other end of the two positive impedance transformation units, and the differential positive electrode is used to interact with the differential signal equally shared by the two positive impedance transformation units. The differential negative terminal is connected to the other end of the two negative impedance transformation units. The differential negative terminal is used to interact with the differential signal that is evenly distributed between the two negative impedance transformation units.

8. The differential signal transceiver processing circuit as described in claim 1 or 7, characterized in that, The number of differential ports and the number of impedance transformation modules are N, where N is a positive integer power of 2; The first differential port is connected to the N / 2-1th and N / 2th impedance transformation modules, and the Nth differential port is connected to the N / 2-1th and N / 2th impedance transformation modules. The N / 2-1 differential port is connected to the first impedance transformation module and the Nth impedance transformation module, and the N / 2 differential port is connected to the first impedance transformation module and the Nth impedance transformation module.

9. The differential signal transceiver processing circuit as described in claim 7, characterized in that, An isolation module, two positive impedance transformation units, and a differential positive electrode are connected in sequence to form a Wilkinson structure between each of the radio frequency channels; An isolation module, two negative impedance transformation units, and a differential negative terminal are connected in sequence to form a Wilkinson structure between each of the radio frequency channels.

10. The differential signal transceiver processing circuit as described in claim 1 or 9, characterized in that, The isolation module consists of a resistor and a capacitor connected in parallel.

11. The differential signal transceiver processing circuit as described in claim 1, characterized in that, The number of primary coils, the number of secondary coils, the number of radio frequency channels, and the number of isolation modules are all positive integer powers of 2.

12. A multi-channel radio frequency front-end transceiver system, characterized in that, The multi-channel radio frequency front-end transceiver system includes the differential signal transceiver processing circuit as described in any one of claims 1-11.

Images