Balanced power amplifier coupling circuit, radio frequency power supply and electronic device

Abstract

The application relates to the technical field of radio frequency power amplifiers, and discloses a balanced power amplifier coupling circuit, a radio frequency power supply and electronic equipment. The balanced power amplifier coupling circuit comprises a power division phase shifter, 2N power amplifier branches, N quadrature couplers and a combiner, N is a positive integer and N>=2; the power division phase shifter has N first output ends and N second output ends; when the power division phase shifter is connected to a radio frequency signal, the phase difference between the power division signals output by the first output ends and the second output ends is 90 degrees; one quadrature coupler is connected to two power amplifier branches; the two power amplifier branches connected to the same quadrature coupler are connected to one first output end and one second output end respectively; and the combiner is connected to the quadrature couplers. The embodiment of the application can improve the fault tolerance and reliability of the balanced power amplifier coupling circuit.

Description

Technical Field

[0001] This application relates to the field of radio frequency power amplifier technology, and in particular to a balanced power amplifier coupling circuit, radio frequency power supply and electronic equipment. Background Technology

[0002] Radio frequency (RF) power supplies are increasingly used in various fields such as semiconductor manufacturing. The future development trend of RF power supplies is to improve their output efficiency and stability. The topology design of balanced RF signal amplifiers is crucial for achieving high-efficiency and high-stability power combining in RF power supplies. Among them, balanced power amplifier coupling is a commonly used technique in RF and microwave systems. It combines the output power of two or more amplifiers into a single output to improve the output power and efficiency of the entire system.

[0003] In related technologies, after the radio frequency signal is divided into multiple power-divided signals, a portion of the power-divided signals are phase-shifted by 90° while another portion is not phase-shifted. Then, power-divided signals with the same phase are coupled into a coupled signal using a coupler, and finally, the coupled signal is coupled together using another coupler. However, this design of first coupling the power-divided signals with the same phase and then coupling the coupled signal has a low fault tolerance defect. It cannot operate at derating when a local circuit topology failure occurs, resulting in low reliability. Utility Model Content

[0004] The purpose of this application is to provide a balanced power amplifier coupling circuit, an RF power supply, and an electronic device, which aim to improve the fault tolerance and reliability of the balanced power amplifier coupling circuit.

[0005] This application provides a balanced power amplifier coupling circuit, including a power divider phase shifter, 2N power amplifier branches, N quadrature couplers and a synthesizer, where N is a positive integer and N≥2; The power divider phase shifter has N first output terminals and N second output terminals. When a radio frequency signal is input, the phase difference between the power divided signals output by the first output terminal and the second output terminal is 90°. The orthogonal coupler connects two power amplifier branches, and the two power amplifier branches connected to the same orthogonal coupler are respectively connected to a first output terminal and a second output terminal; The synthesizer is connected to the orthogonal coupler.

[0006] In some embodiments, the power and impedance characteristics of the power amplifier signals output by each of the power amplifier branches are the same.

[0007] In some embodiments, the synthesizer includes an N-in-one synthesis module; the synthesizer uses the N-in-one synthesis module to synthesize the quadrature coupling signals output by each of the quadrature couplers into a power amplifier synthesized signal.

[0008] In some embodiments, the synthesizer includes N-1 signal coupling modules, where N is a power of 2; the signal coupling modules are respectively connected to the output terminals of two of the quadrature couplers or respectively connected to the output terminals of two other signal coupling modules, so that the quadrature coupling signals output by each of the quadrature couplers are coupled in layers to form a power amplifier synthesized signal.

[0009] In some embodiments, the power divider phase shifter includes a power divider module and a phase shifter module; the power divider module is configured to divide the incoming radio frequency signal into 2N power divider signals; the phase shifter module, connected to the power divider module, is configured to perform phase shifting processing on the N power divider signals to form phase shifted signals.

[0010] In some embodiments, the power amplifier branch includes a matching module, an input module, a power amplification module, and an output module connected in sequence.

[0011] In some embodiments, the power amplification module includes a push-pull Class E power amplifier.

[0012] In some embodiments, the input module includes a transformer and a dummy load resistor, and the matching module, the transformer, the dummy load resistor, the power amplifier module and the output module are connected in sequence.

[0013] This application also provides an RF power supply, including an RF signal generation module and the above-described balanced power amplifier coupling circuit.

[0014] This application also provides an electronic device, including the radio frequency power supply described above.

[0015] The beneficial effects of this application are as follows: By first performing power amplification and quadrature coupling processing on at least two pairs of phase-orthogonal power-dividing signals, and then synthesizing the resulting at least one pair of quadrature coupled signals, when a single power amplifier branch fails, the isolation port of the corresponding quadrature coupler will absorb the fault signal, and partial power output can still be maintained through another power amplifier branch. Meanwhile, other quadrature couplers continue to operate normally. When both power amplifier branches corresponding to a single quadrature coupler fail simultaneously, the isolation port of the synthesizer will absorb the fault signal, and partial power output can still be maintained through other quadrature couplers. The balanced power amplifier coupling circuit can still operate normally, achieving power derating operation under fault conditions, and exhibiting good fault tolerance and reliability. Furthermore, the processing mechanism of first performing power amplification and quadrature coupling processing on the phase-orthogonal power-dividing signals and then synthesizing the resulting quadrature coupled signals effectively reduces mutual interference between power amplifier branches, resulting in good reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the balanced power amplifier coupling circuit provided in the first embodiment of this application.

[0017] Figure 2 This is a schematic diagram of the structure of the balanced power amplifier coupling circuit provided in the second embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the structure of the balanced power amplifier coupling circuit provided in the third embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the structure of the balanced power amplifier coupling circuit provided in the fourth embodiment of this application.

[0020] Figure 5 This is a schematic diagram of the power divider phase shifter provided in the embodiments of this application.

[0021] Figure 6 This is a schematic diagram of the power amplifier branch provided in the embodiment of this application.

[0022] Figure 7 This is a schematic diagram of the structure of the radio frequency power supply provided in the embodiments of this application.

[0023] Figure 8 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0025] It should be noted that the terms "first," "second," "third," "fourth," etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a system, product, or device that includes a series of circuits is not necessarily limited to those explicitly listed, but may include other circuits not explicitly listed or inherent to such systems, products, or devices.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0027] This application provides a balanced power amplifier coupling circuit.

[0028] See Figure 1 In one embodiment, the balanced power amplifier coupling circuit includes a power divider phase shifter 1, 2N power amplifier branches 2, N quadrature couplers 3, and a synthesizer 4, wherein N is a positive integer and N≥2.

[0029] The power divider phase shifter 1 has one input terminal, N first output terminals, and N second output terminals. After the power divider phase shifter 1 receives an RF signal through its input terminal, the phase difference between the power-divided signals output from the first and second output terminals is 90°. It can be understood that the power divider phase shifter 1 is a device capable of equally dividing an input signal into two orthogonal signals, which can be implemented using a Wilkinson power divider combined with a phase-shifting network. In practical applications, the power divider phase shifter 1 receives an external RF signal through its input terminal and equally divides the received RF signal into 2N power-divided signals. N of these power-divided signals undergo a 90° phase shift and are output from their respective first output terminals. The remaining N un-phase-shifted power-divided signals are output from their respective second output terminals.

[0030] In a balanced power amplifier coupling circuit, a quadrature coupler 3 connects two power amplifier branches 2. The two power amplifier branches 2 connected to the same quadrature coupler 3 are respectively connected to a first output terminal and a second output terminal. It can be understood that the quadrature coupler 3 refers to a device capable of synthesizing quadrature signals, such as a Lange coupler or a branch-line coupler, whose input terminals receive amplified signals with quadrature phases. Power amplifier branches 2 refer to signal paths containing power amplification functions, which can be implemented using transistor amplifier circuits. In practical applications, each power amplifier branch 2 is paired and connected to a corresponding quadrature coupler 3. The two power amplifier branches 2 connected to the same quadrature coupler 3 respectively receive a phase-shifted power-divided signal from one of their first input terminals and an un-phase-shifted power-divided signal from one of their second input terminals. The quadrature coupler 3 receives the power amplified signals output from the two power amplifier branches 2 and performs quadrature coupling to obtain the corresponding quadrature coupled signals.

[0031] Synthesizer 4 is connected to quadrature coupler 3. Synthesizer 4 refers to a multi-channel signal combining device, which can employ a hierarchical combining structure or a multi-in-one combining structure. In practical applications, synthesizer 4 receives the quadrature coupled signals output from each quadrature coupler 3, and combines these signals into a power amplifier combined signal for output using either hierarchical or multi-in-one combining methods.

[0032] The balanced power amplifier coupling circuit provided in this application embodiment is used to perform balanced power amplifier coupling on the radio frequency signal input to the front-end circuit. Specifically, the radio frequency signal input to the front-end circuit is first divided and phase-shifted by the power divider phase shifter 1 to obtain N pairs of phase-orthogonal power-divided signals. Each pair of phase-orthogonal power-divided signals drives two power amplifier branches 2 connected to the same quadrature coupler 3, so that the two power amplifier circuits perform power amplifier processing on the input power-divided signals and output the obtained power amplifier signals to the quadrature coupler 3. The quadrature coupler 3 receives the power amplifier signals output from different power amplifier branches 2 and performs initial synthesis to form a quadrature coupled signal with phase redundancy. Each quadrature coupler 3 outputs the quadrature coupled signal to the synthesizer 4 for secondary synthesis, and finally forms the corresponding power amplifier synthesized signal and outputs it. Because at least two pairs of orthogonal phase power-dividing signals are first processed by power amplification and quadrature coupling, and then at least one pair of quadrature coupled signals are synthesized, when a single power amplifier branch 2 fails, the isolation port of the corresponding quadrature coupler 3 will absorb the fault signal, and partial power output can still be maintained through another power amplifier branch 2. At the same time, other quadrature couplers 3 continue to work normally. When both power amplifier branches 2 corresponding to a single quadrature coupler 3 fail simultaneously, the isolation port of the synthesizer 4 will absorb the fault signal, and partial power output can still be maintained through other quadrature couplers 3. The balanced power amplifier coupling circuit can still work normally, realizing power derating operation under fault conditions and exhibiting good fault tolerance performance. Furthermore, the processing mechanism of first processing the orthogonal phase power-dividing signals by power amplification and quadrature coupling, and then synthesizing the resulting quadrature coupled signals, effectively reduces mutual interference between power amplifier branches 2, resulting in good reliability.

[0033] In some embodiments, the power and impedance characteristics of the power amplifier signals output by each power amplifier branch 2 are the same.

[0034] In the balanced power amplifier coupling circuit, all power amplifier branches 2 are configured to output power amplifier signals with the same power and impedance characteristics. After the RF signal is distributed to each power amplifier branch 2 by the power divider phase shifter 1, each power amplifier branch 2 adjusts the input impedance of the power divided signal and amplifies the power divided signal to a preset power value. For example, the power of the power amplifier signal output by each power amplifier branch 2 can be 800W, and the output impedance of the power amplifier branch 2 can be 100Ω. The power of the quadrature coupling signal output by each quadrature coupler 3 can be 1600W, and the output impedance of the quadrature coupler 3 can be 100Ω. Since the power and impedance characteristics of each power amplifier branch 2 are consistent, the quadrature coupler 3 can avoid phase errors or energy losses caused by power differences or impedance mismatch when combining power amplifier signals, and the combiner 4 can avoid phase errors or energy losses when combining quadrature coupling signals, thereby improving the combining efficiency.

[0035] See Figure 2In one embodiment, the synthesizer 4 includes an N-to-one synthesis module 41. The synthesizer 4 uses the N-to-one synthesis module 41 to synthesize the quadrature coupling signals output by each quadrature coupler 3 into a power amplifier synthesized signal.

[0036] It can be understood that the N-in-one synthesis module 41 refers to a circuit structure that can directly synthesize N input signals into a single output signal. Specifically, it can be implemented using a multi-stage power synthesis structure or a microstrip line-based synthesizer 4. Its function is to simplify the signal synthesis hierarchy and reduce signal transmission loss.

[0037] This embodiment uses a direct synthesis method to synthesize orthogonally coupled signals into a power amplifier synthesized signal.

[0038] The N-to-1 combining module 41 is configured to simultaneously receive orthogonal coupled signals from all quadrature couplers 3 and directly combine these signals into a single power amplifier combined signal. For example, when N is 4, the combiner 4 can connect the output ports of the four quadrature couplers 3 to the four input ports of the N-to-1 combining module 41 respectively, achieving signal synthesis through internal parallel or series structures. In this process, the orthogonal coupled signals output by each quadrature coupler 3 do not need to go through intermediate coupling steps, but instead complete the energy superposition in one go through the N-to-1 combining module 41. Thus, by directly combining all quadrature coupled signals through the N-to-1 combining module 41, intermediate coupling links are reduced, allowing the remaining branches to maintain partial power output through the N-to-1 combining module 41 even if a single power amplifier branch 2 or quadrature coupler 3 fails, thereby achieving derating operation.

[0039] See Figure 3 In one embodiment, the synthesizer 4 includes N-1 signal coupling modules 42, where N is a power of 2. The signal coupling modules 42 are respectively connected to the output terminals of two quadrature couplers 3 or respectively connected to the output terminals of two other signal coupling modules 42, so that the quadrature coupled signals output by each quadrature coupler 3 are coupled in layers to form a power amplifier synthesized signal.

[0040] It can be understood that signal coupling module 42 refers to a circuit unit used to combine the power of two input signals. Specifically, it can be implemented using a Wilkinson coupler or a hybrid loop coupler, and its function is to superimpose signals from different paths. Layered coupling refers to a coupling method in which multiple orthogonally coupled signals are combined into a single output signal layer by layer through multi-level signal coupling modules 42. Specifically, it can be implemented through tree topology or chain topology, and its function is to improve the redundancy of signal synthesis through modular design.

[0041] This embodiment uses a layered coupling method to synthesize orthogonally coupled signals into a power amplifier synthesized signal.

[0042] When N is even, the number of signal coupling modules 42 is N-1. Each signal coupling module 42 has two connection methods in the synthesizer 4: the first method is to directly connect the outputs of two quadrature couplers 3 to the input of the same signal coupling module 42; the second method is to connect the outputs of two signal coupling modules 42 to the input of another signal coupling module 42. Through these connection methods, the quadrature coupled signals output by the quadrature couplers 3 are combined layer by layer to finally form a single power amplifier synthesized signal. For example, when N equals 4, the first layer sets two signal coupling modules 42 to connect to the outputs of four quadrature couplers 3 respectively, and the second layer sets one signal coupling module 42 to connect to the outputs of the first two signal coupling modules 42. Thus, through the layered coupling structure, the signal synthesis path is distributed to multiple levels, and even if a certain level or module fails, the remaining levels can still maintain part of the signal synthesis function.

[0043] See Figure 4 In one embodiment, the power divider phase shifter 1 includes a power divider module 11 and a phase shifter module 12. The power divider module 11 is configured to divide the incoming radio frequency signal into 2N equal power divider signals, and the phase shifter module 12, connected to the power divider module 11, is configured to perform phase shifting processing on the N power divider signals into phase shifted signals.

[0044] It can be understood that the power divider module 11 refers to a circuit structure that equally divides the input RF signal into multiple power-divided signals. Specifically, it can be implemented using a Wilkinson power divider or a microstrip line power divider. Its function is to ensure the power balance of the input signals in each branch. The phase shifter module 12 refers to a functional module that can change the phase of the signal. Specifically, it can be implemented using a transmission line delay structure or an adjustable phase shifter. Its function is to adjust the phase of some branch signals to form orthogonal signal pairs.

[0045] After the power divider module 11 divides the RF signal into 2N equal power signals, the phase shifter module 12 only adjusts the phase of N of these signals. For example, when N is 2, the power divider module 11 outputs four equally divided power signals, and the phase shifter module 12 can selectively apply a 90° phase shift to two of these signals. This selective phase shifting allows the power amplifier branch 2 connected to the quadrature coupler 3 to obtain an input signal with a fixed phase difference, thereby forming a stable superposition effect in the subsequent synthesis process. The separate design of the power divider module 11 and the phase shifter module 12 allows for independent optimization of signal distribution accuracy and phase control accuracy.

[0046] like Figure 5As shown, in a specific embodiment, the power divider module 11 has one input terminal, two first output terminals and two second output terminals, and the power divider module 11 includes capacitors C1-C6, inductors L1-L5 and resistors R1-R4. The first terminals of capacitors C1 and C2 are connected to the first and second terminals of inductor L1, respectively. The second terminal of inductor L1 is connected to the first terminals of inductors L2, L3, L4, and L5, respectively. The second terminal of inductor L2 is connected to the first terminal of capacitor C3 and the first terminal of resistor R1, respectively. The second terminal of inductor L3 is connected to the first terminal of capacitor C4 and the first terminal of resistor R2, respectively. The second terminal of inductor L4 is connected to the first terminal of capacitor C5 and the first terminal of resistor R3, respectively. The second terminal of inductor L5 is connected to the first terminal of capacitor C6 and the first terminal of resistor R4. The second terminals of capacitors C1, C2, C3, C4, C5, and C6 are grounded. The second terminals of resistors R1, R2, R3, and R4 are connected. The first end of inductor L1 serves as the input terminal of power divider module 11. After the radio frequency signal passes through the impedance matching circuit composed of inductor L1, capacitor C1, and capacitor C2, it is further divided into four power divider signals, which are output through the second ends of inductor L2, inductor L3, inductor L4, and inductor L5, respectively. A phase shifter composed of capacitor C7, inductor L6, and capacitor C8 performs a 90° phase shift on the output signal of inductor L3, and a phase shifter composed of capacitor C9, inductor L7, and capacitor C10 performs a 90° phase shift on the output signal of inductor L5.

[0047] like Figure 5 As shown, in a specific embodiment, there are two sets of phase shift modules 12. Capacitors C7 and C8 and inductor L6 constitute the first set of phase shift modules 12, and capacitors C9 and C10 and inductor L7 constitute the second set of phase shift modules 12. The first end of inductor L6 is connected to the second end of inductor L3. The first ends of capacitors C7 and C8 are respectively connected to the first and second ends of inductor L6. The second ends of capacitors C7 and C8 are grounded. The first end of inductor L7 is connected to the second end of inductor L5. The first ends of capacitors C9 and C10 are respectively connected to the first and second ends of inductor L7. The second ends of capacitors C9 and C10 are grounded. The first end of inductor L6 serves as the input terminal of the first set of phase shift modules 12. After the power divider signal is input through the first end of inductor L6, it undergoes a 90° phase shift under the action of inductor L6, capacitors C7 and C8, and is finally output through the second end of inductor L6. Similarly, the first end of inductor L7 serves as the input end of the second phase shift module 12. After the power division signal is input through the first end of inductor L7, it undergoes a 90° phase shift under the action of inductor L7, capacitor C9, and capacitor C10, and is finally output through the second end of inductor L7.

[0048] See Figure 6 In one embodiment, the power amplifier branch 2 includes a matching module 21, an input module 22, a power amplification module 23, and an output module 24 connected in sequence.

[0049] It can be understood that the matching module 21 refers to the circuit unit used to achieve impedance matching between the input signal and the power amplifier module 23. Specifically, it can be implemented using an LC matching network, and its function is to eliminate signal reflection and improve energy transmission efficiency. The input module 22 refers to the circuit unit used to convert the input single-ended unbalanced RF signal into a double-ended balanced signal. Specifically, it can be implemented using a transformer 221, and its function is to provide drive signals to the two input terminals of the power amplifier module. The power amplifier module 23 refers to the circuit module used to amplify the power of the RF signal. Specifically, it can be implemented using a push-pull power amplifier, and its function is to amplify the signal through a high-efficiency switching mode. The output module 24 refers to the circuit unit used to convert the two double-ended balanced output signals of the power amplifier module into single-ended output signals and complete impedance transformation. Specifically, it can be implemented using a transformer.

[0050] When the power amplifier circuit processes the power-divided signal, the signal undergoes impedance adjustment by the matching module 21 before entering the input module 22 for single-ended to double-ended conversion. It is then efficiently amplified by the power amplifier module 23 and finally restored to the target voltage level via the output module 24, completing the double-ended to single-ended output conversion. The series connection of the modules in the power amplifier circuit forms a complete signal processing link. The collaborative work of the input module 22 and the output module 24 effectively distributes and synthesizes the amplified signal, while the impedance adjustment function of the matching module 21 ensures lossless signal transmission at different processing stages.

[0051] See Figure 6 In one embodiment, the power amplification module 23 includes a push-pull Class E power amplifier 231.

[0052] It can be understood that the push-pull Class E power amplifier 231 refers to a switch-mode amplifier consisting of two transistors connected in a push-pull manner. Specifically, it can be implemented by symmetrically arranging complementary field-effect transistors across the secondary winding of the input transformer 221, with the two transistors alternately conducting to form a complete sine wave output.

[0053] The push-pull Class-E power amplifier 231 decomposes the radio frequency signal into two opposite-phase drive signals through the input transformer 221, which control the conduction and turn-off of two transistors respectively. When the first transistor is on, the second transistor is off, and the two alternately work to convert DC power into a high-frequency AC signal. The output terminal filters out higher harmonics through an LC network to form a complete waveform. Its switching action works in conjunction with the resonant circuit so that the transistors switch states only when the voltage or current crosses zero, thereby reducing switching losses. This structure maintains high efficiency while using the symmetry of the push-pull topology to cancel even harmonics, further reducing the distortion of the output signal.

[0054] See Figure 6 In one embodiment, the input module 22 includes a transformer 221 and a dummy load resistor 222, and the matching module 21, the transformer 221, the dummy load resistor 222, the power amplifier module 23 and the output module 24 are connected in sequence.

[0055] The power-divided signal output from matching module 21 is transformed into a two-ended signal by transformer 221, then impedance-matched and adjusted by dummy load resistor 222 before being sent to power amplifier module 23 for signal amplification. The dummy load resistor 222 reduces the gain of the power amplifier, and its damping effect improves the stability of the entire link. Output module 24 converts the amplified two-ended signal back to a single-ended output, which is finally output to quadrature coupler 3.

[0056] This application also provides an embodiment of a radio frequency power supply.

[0057] See Figure 7 In one embodiment, the radio frequency circuit includes a signal generation module and the balanced power amplifier coupling circuit provided in the above embodiments. For example... Figure 7 As shown, the RF circuit includes a signal generation module and a balanced power amplifier coupling circuit. The signal generation module serves as the signal input device for the balanced power amplifier coupling circuit. The signal input to the balanced power amplifier coupling circuit from the signal generation module can be from various signal sources, such as electrical signals and RF signals, depending on the actual application scenario. Optionally, the RF circuit can also integrate a power supply unit (not shown in the figure). The power supply unit provides a stable power input to the power amplifier in the balanced power amplifier coupling circuit to ensure circuit reliability. Here, the power supply unit includes, but is not limited to, a battery pack, an uninterruptible power supply, a DC power supply module, etc., depending on the actual application scenario. The balanced power amplifier coupling circuit can... Figures 1 to 6 For any of the balanced power amplifier coupling circuits shown, the circuit structure and implementation method can be found in the above. Figures 1 to 6 The provided circuit structure and implementation method will not be elaborated here. Figure 7As shown, the balanced power amplifier coupling circuit can split the signal output from the signal generation module into multiple power-divided signals, amplify them, and then synthesize them into a single power amplifier combined signal to improve output power. Here, the balanced power amplifier coupling circuit can also integrate a thermal management module (not shown in the figure) to increase heat dissipation, allowing the large amount of heat generated by the power amplifier and other devices during circuit operation to be released, thereby maintaining device performance and circuit reliability. The thermal management module may include, but is not limited to, heat sinks, fans, or liquid cooling systems, depending on the actual application scenario, and is not limited here.

[0058] This application also provides an electronic device.

[0059] See Figure 8 In one embodiment, the electronic device may include a radio frequency power supply, a processor, a memory, an input / output device, a communication module, and other necessary electronic components (not shown in the figure) and interfaces. Furthermore, the electronic device may also include at least one communication bus, which can be used to enable communication between these components. The radio frequency power supply described in this embodiment may be one of the aforementioned components. Figure 7 The illustrated embodiment provides an RF power supply. Input / output devices may include a display, keyboard, touchscreen, etc. Communication modules may optionally include Wi-Fi, Bluetooth, NFC, etc. Interfaces may optionally include standard wired interfaces and wireless interfaces. Memory includes random access memory and non-volatile memory, such as erasable programmable read-only memory. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor. Figure 8 As shown, a memory, which is a computer-readable storage medium, may include an operating system, a network communication module, a user interface module, and a device control application program. In this embodiment, the memory is used to store program code. Figure 8 As shown, the RF power supply, as a core component, incorporates a signal generation unit (not shown in the figure) and, according to the above... Figures 1 to 6 The balanced power amplifier coupling circuit (not shown in the figure) provided in any of the embodiments shown is responsible for generating radio frequency signals and efficiently and stably amplifying these signals to ensure balanced output. When the electronic device is started, the processor loads the necessary programs and configurations, the radio frequency power supply starts working, and the signal generation unit generates radio frequency signals of specific frequency and amplitude under the control of the processor. After being amplified by the balanced power amplifier coupling circuit, the signals are output to the output terminal. The electronic device can be one of the following: communication equipment (such as smartphones, tablets, wireless routers, etc.), wireless broadcasting and television equipment, plasma generators (etching / deposition equipment), industrial radio frequency heating systems, high-power magnetron drive sources, medical equipment (such as radio frequency ablation devices, magnetic resonance imaging equipment, etc.), and industrial and scientific research equipment (such as radio frequency identification, material heating, plasma generation, etc.).

[0060] In summary, the balanced power amplifier coupling circuit, RF power supply, and electronic equipment provided in this application first perform power amplification and quadrature coupling processing on at least two pairs of phase-orthogonal power-dividing signals, and then synthesize the resulting at least one pair of quadrature coupled signals. When a single power amplifier branch fails, the isolation port of the corresponding quadrature coupler absorbs the fault signal, and can still maintain partial power output through another power amplifier branch, while other quadrature couplers continue to operate normally. When both power amplifier branches corresponding to a single quadrature coupler fail simultaneously, the isolation port of the synthesizer absorbs the fault signal, and can still maintain partial power output through other quadrature couplers, and the balanced power amplifier coupling circuit can still operate normally, achieving power derating operation under fault conditions, and exhibiting good fault tolerance and reliability. Furthermore, the processing mechanism of first performing power amplification and quadrature coupling processing on the phase-orthogonal power-dividing signals and then synthesizing the resulting quadrature coupled signals effectively reduces mutual interference between power amplifier branches, exhibiting good reliability.

[0061] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0062] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A balanced power amplifier coupling circuit, characterized in that, It includes a power divider phase shifter, 2N power amplifier branches, N quadrature couplers and a combiner, where N is a positive integer and N≥2; The power divider phase shifter has N first output terminals and N second output terminals. When a radio frequency signal is input, the phase difference between the power divided signals output by the first output terminal and the second output terminal is 90°. The orthogonal coupler connects two power amplifier branches, and the two power amplifier branches connected to the same orthogonal coupler are respectively connected to a first output terminal and a second output terminal; The synthesizer is connected to the orthogonal coupler.

2. The balanced power amplifier coupling circuit according to claim 1, characterized in that, The power and impedance characteristics of the power amplifier signals output by each of the aforementioned power amplifier branches are the same.

3. The balanced power amplifier coupling circuit according to claim 1, characterized in that, The synthesizer includes an N-in-one synthesis module; the synthesizer uses the N-in-one synthesis module to synthesize the orthogonal coupling signals output by each of the orthogonal couplers into a power amplifier synthesized signal.

4. The balanced power amplifier coupling circuit according to claim 1, characterized in that, The synthesizer includes N-1 signal coupling modules, where N is a power of 2. Each signal coupling module is connected to the output of two of the quadrature couplers or to the output of two other signal coupling modules, so that the quadrature coupling signals output by each quadrature coupler are coupled in layers to form a power amplifier synthesized signal.

5. The balanced power amplifier coupling circuit according to any one of claims 1 to 4, characterized in that, The power divider phase shifter includes a power divider module and a phase shifter module; the power divider module is configured to divide the incoming radio frequency signal into 2N equal power divider signals; the phase shifter module, connected to the power divider module, is configured to perform phase shifting processing on the N power divider signals into phase shifted signals.

6. The balanced power amplifier coupling circuit according to any one of claims 1 to 4, characterized in that, The power amplifier branch includes a matching module, an input module, a power amplification module, and an output module connected in sequence.

7. The balanced power amplifier coupling circuit according to claim 6, characterized in that, The power amplification module includes a push-pull Class E power amplifier.

8. The balanced power amplifier coupling circuit according to claim 6, characterized in that, The input module includes a transformer and a dummy load resistor, and the matching module, the transformer, the dummy load resistor, the power amplifier module and the output module are connected in sequence.

9. A radio frequency power supply, characterized in that, It includes a radio frequency signal generation module and a balanced power amplifier coupling circuit as described in any one of claims 1 to 8.

10. An electronic device, characterized in that, Includes the radio frequency power supply as described in claim 9.

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