Last-stage power amplifier circuit structure and device for solid-state power source

Abstract

The utility model discloses a last-stage power amplifier circuit structure and device for a solid-state power source, which relates to the technical field of power amplifier circuits, and comprises an equal shunt circuit, an input end of the equal shunt circuit is electrically connected with an input end of the last-stage power amplifier circuit structure, and an output end of the equal shunt circuit is electrically connected with an output end of the last-stage power amplifier circuit structure. The equally-divided circuit is used for equally dividing and dividing a radio-frequency signal input through the input end of the final-stage power amplifier circuit structure into a plurality of parts; and the plurality of circulators are respectively connected with the output end of the equal shunt circuit, and each circulator respectively receives a part of shunt radio frequency signals. According to the utility model, the equi-shunt circuit, the circulator, the first amplification circuit and the synthesizer are arranged in the final-stage power amplification circuit structure, so that power amplification processing can be carried out on input radio-frequency signals, and meanwhile, the coupling detection circuit is arranged at the output end of the final-stage power amplification circuit structure; the radio frequency signal output by the synthesis circuit can be detected, so that stable and reliable radio frequency power can be provided.

Description

Technical Field

[0001] The utility model relates to the technical field of power amplifier circuits, in particular to a final-stage power amplifier circuit structure and device for a solid-state power source. Background Art

[0002] Solid-state power sources are a key component of particle accelerators, primarily providing RF power. As part of the RF processing, the power amplifier circuit must process the RF signal while also providing stable and reliable RF power while meeting test requirements and specifications. Utility Model Content

[0003] The purpose of the utility model is to provide stable and reliable radio frequency power, and to propose a final power amplifier circuit structure for a solid-state power source.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] In a first aspect, the present invention provides a final-stage power amplifier circuit structure for a solid-state power source, comprising:

[0006] an equal current splitting circuit, the input end of which is electrically connected to the input end of the final power amplifier circuit structure, and the equal current splitting circuit is used to equally split the radio frequency signal input through the input end of the final power amplifier circuit structure into multiple parts;

[0007] A plurality of circulators, each of which is connected to the output end of the equal current splitting circuit, and each circulator receives a portion of the split radio frequency signal;

[0008] a first amplifier circuit, wherein input ends of the first amplifier circuit are respectively connected to the plurality of circulators, and the first amplifier circuit is used to perform signal amplification processing on the plurality of split radio frequency signals;

[0009] a synthesis circuit, wherein an input end of the synthesis circuit is electrically connected to the plurality of first amplification circuits, and the synthesis circuit is used to integrate and synthesize each of the split and amplified radio frequency signals;

[0010] A coupling detection circuit is electrically connected to the output end of the final power amplifier circuit structure and the synthesis circuit respectively, and is used to detect the radio frequency signal output by the synthesis circuit.

[0011] In some feasible solutions, the first amplifying circuit includes:

[0012] Multiple power amplifier tubes, the input ends and output ends of the multiple power amplifier tubes are respectively connected to the multiple circulators, and the multiple power amplifier tubes are respectively used to amplify the multiple split radio frequency signals.

[0013] In some feasible solutions, the final-stage power amplifier circuit structure further includes: a plurality of negative voltage timing control circuits, a plurality of bias circuits and a gate voltage power supply circuit.

[0014] In some feasible solutions, a fan-shaped microstrip line region is further provided in the bias circuit.

[0015] In some feasible solutions, a potentiometer and a voltage regulator tube are provided in the gate voltage power supply circuit.

[0016] In some feasible solutions, the equal current splitting circuit includes: a Wilkinson 1:3 divider with a microstrip structure;

[0017] The synthesis circuit includes a Wilkinson 1:3 synthesizer with a microstrip structure.

[0018] A second aspect of the present invention provides a solid-state power source device, which adopts a final-stage power amplifier circuit structure for a solid-state power source as described in any one of the first aspects.

[0019] In some feasible solutions, the device further includes:

[0020] A control unit is electrically connected to the output end of the final power amplifier circuit structure, and is used to control the final power amplifier circuit structure to perform power amplification operation and detect the output power of the output end of the final power amplifier circuit structure.

[0021] The beneficial effects of the utility model are:

[0022] The utility model can realize power amplification processing of input radio frequency signals by arranging an equal current splitting circuit, a circulator, a first amplifying circuit and a synthesizer in the final power amplifier circuit structure. At the same time, a coupling detection circuit is arranged at the output end of the final power amplifier circuit structure, which can detect the radio frequency signal output by the synthesizing circuit, so as to realize the provision of stable and reliable radio frequency power. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a final-stage power amplifier circuit for a solid-state power source provided in an embodiment of the present utility model;

[0024] Figure 2 This is a circuit diagram of the final power amplifier circuit structure for a solid-state power source provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] Example

[0030] Reference Figures 1 to 2In order to provide stable and reliable radio frequency power for a particle accelerator, the present invention provides a final-stage power amplifier circuit structure for a solid-state power source. The final-stage power amplifier circuit structure includes an equal-splitting circuit, multiple circulators, a first amplifier circuit, a combining circuit, and a coupled detection circuit. The input end of the equal-splitting circuit is electrically connected to the input end of the final-stage power amplifier circuit structure. The equal-splitting circuit is configured to equally divide the radio frequency signal inputted through the input end of the final-stage power amplifier circuit structure into multiple parts. The multiple circulators are respectively connected to the output end of the equal-splitting circuit, with each circulator receiving a portion of the divided radio frequency signal. The input end of the first amplifier circuit is respectively connected to the multiple circulators, and the first amplifier circuit is configured to amplify the multiple divided radio frequency signals. The input end of the combining circuit is electrically connected to the multiple first amplifier circuits, and the combining circuit is configured to combine the divided and amplified radio frequency signals to ensure that the combined radio frequency signal meets radio frequency requirements. Specifically, the first amplifier circuit includes: a plurality of power amplifier tubes, each of which has its input and output ends connected to a plurality of circulators, each of which is configured to amplify the multiple split RF signals. A coupling detection circuit is electrically connected to the output end of the final power amplifier circuit structure and the synthesizing circuit, respectively. The coupling detection circuit is configured to detect the RF signal output by the synthesizing circuit based on a control signal from the output end of the final power amplifier circuit structure, and to determine whether the output power detection of the RF signal processed by the synthesizing circuit meets the requirements. In this embodiment, to facilitate the coupling detection circuit's output power detection of the RF signal processed by the synthesizing circuit, a parallel line coupling structure is electrically connected to the output end of the synthesizing circuit. Accordingly, the coupling detection circuit also has a parallel line coupling structure. It should be noted that the number of circulators can be set according to RF requirements. The circulators in the final power amplifier circuit structure can improve the isolation of signal amplification and processing, while also enhancing the anti-total reflection capability of the final power amplifier circuit structure. In this embodiment, by providing an equal current splitting circuit, a circulator, a first amplifying circuit and a synthesizer in the final power amplifier circuit structure, it is possible to perform power amplification processing on the input RF signal. At the same time, a coupling detection circuit is provided at the output end of the final power amplifier circuit structure, which can detect the RF signal output by the synthesizer circuit, so as to provide stable and reliable RF power.

[0031] In this embodiment, the circulators in the final-stage power amplifier circuit structure may be connected in the following manner: seven circulators may be provided, with three circulators electrically connected to the input ends of the three power amplifier tubes. These three circulators have a power tolerance of 100 W and an insertion loss of approximately 0.3 dB. Pin 3 of the circulator is connected to a 60 W ceramic load, and pin 2 is connected to the final-stage amplifier. Three circulators are also electrically connected to the output ends of the three power amplifier tubes. These three circulators are consistent with the previous three, i.e., have a power tolerance of 100 W and an insertion loss of approximately 0.3 dB. Pin 3 of the circulator is connected to a 150 W ceramic load. The last circulator is electrically connected to the output end of the synthesizer circuit to improve the isolation and stability of the synthesized RF signal.

[0032] In this embodiment, to ensure that the multiple power amplifier tubes can stably amplify each of the split RF signals, the final-stage power amplifier circuit structure further includes: multiple negative voltage timing control circuits, multiple bias circuits, and a gate voltage supply circuit. The three negative voltage timing control circuits are electrically connected to the three power amplifier tubes. When the power amplifier tubes in the final-stage power amplifier circuit structure are GaN power amplifier tubes, strict requirements for gate voltage and drain voltage power-up timing can be achieved, thereby ensuring the reliability of the power amplifier tube signal amplification processing. The multiple bias circuits are electrically connected to the three power amplifier tubes. The bias circuits also include a fan-shaped microstrip line region to ensure that the RF signal does not affect the power supply module, ensuring power supply stability. The gate voltage supply circuit is electrically connected to the power supply module and the negative voltage timing control circuit. The gate voltage supply circuit includes a potentiometer and a voltage regulator. By adding a potentiometer to the gate voltage supply circuit to ensure adjustable gate voltage and a voltage regulator to ensure that the adjusted gate voltage does not change, the final-stage power amplifier circuit structure is ensured to operate reliably.

[0033] In this embodiment, the equal-splitting circuit can preferably be a Wilkinson 1:3 divider with a microstrip structure, so that the RF signal is divided into three equal parts according to RF requirements via the equal-splitting circuit. Correspondingly, the combining circuit can be a Wilkinson 1:3 combiner with a microstrip structure, so that the RF signal divided into three equal parts can be combined.

[0034] In some embodiments, the present invention further provides a solid-state power source device, wherein the power amplifier device utilizes the aforementioned final-stage power amplifier circuit structure and is further provided with a control unit. In this embodiment, the output terminal of the final-stage power amplifier circuit structure is electrically connected to the control unit, which is used to control the power amplification operation of the final-stage power amplifier circuit structure and detect the output power at the output terminal of the final-stage power amplifier circuit structure. The control unit is also electrically connected to the negative voltage timing control circuit in the final-stage power amplifier circuit structure to control the power supply switch of the final-stage power amplifier circuit structure. The control unit is electrically connected to the coupling detection circuit. The control unit receives the output power and reflected power detection signals input from the coupler and displays the output power and reflected power in combination with the power-voltage corresponding curve within the control unit. In this embodiment, to monitor the temperature of the final-stage power amplifier circuit structure, a temperature sensor is further provided at the input terminal of the main control unit. The input terminal of the final-stage power amplifier circuit structure receives a digital temperature signal input from the temperature sensor to display the temperature of the final-stage power amplifier circuit structure.

[0035] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A final stage power amplifier circuit structure for a solid-state power source, characterized in that: include: an equal current splitting circuit, the input end of which is electrically connected to the input end of the final power amplifier circuit structure, and the equal current splitting circuit is used to equally split the radio frequency signal input through the input end of the final power amplifier circuit structure into multiple parts; A plurality of circulators, each of which is connected to the output end of the equal current splitting circuit, and each circulator receives a portion of the split radio frequency signal; a first amplifier circuit, wherein input ends of the first amplifier circuit are respectively connected to the plurality of circulators, and the first amplifier circuit is used to perform signal amplification processing on the plurality of split radio frequency signals; a synthesis circuit, wherein an input end of the synthesis circuit is electrically connected to the plurality of first amplification circuits, and the synthesis circuit is used to integrate and synthesize each of the split and amplified radio frequency signals; A coupling detection circuit is electrically connected to the output end of the final power amplifier circuit structure and the synthesis circuit respectively, and is used to detect the radio frequency signal output by the synthesis circuit.

2. The final power amplifier circuit structure for a solid-state power source according to claim 1, characterized in that: The first amplifying circuit includes: Multiple power amplifier tubes, the input ends and output ends of the multiple power amplifier tubes are respectively connected to the multiple circulators, and the multiple power amplifier tubes are respectively used to amplify the multiple split radio frequency signals.

3. The final power amplifier circuit structure for a solid-state power source according to claim 2, characterized in that: The final stage power amplifier circuit structure further includes: a plurality of negative voltage timing control circuits, a plurality of bias circuits and a gate voltage power supply circuit.

4. The final power amplifier circuit structure for a solid-state power source according to claim 3, characterized in that: The bias circuit is also provided with a fan-shaped microstrip line area.

5. The final power amplifier circuit structure for a solid-state power source according to claim 4, characterized in that: The gate voltage power supply circuit is provided with a potentiometer and a voltage regulator tube.

6. The final power amplifier circuit structure for a solid-state power source according to claim 1, characterized in that: The equal current splitting circuit includes: a Wilkinson 1:3 divider with a microstrip structure; The synthesis circuit includes a Wilkinson 1:3 synthesizer with a microstrip structure.

7. A solid-state power source device, characterized in that: A final-stage power amplifier circuit structure for a solid-state power source according to any one of claims 1 to 6 is adopted.

8. The solid-state power source device according to claim 7, characterized in that: The device further comprises: A control unit is electrically connected to the output end of the final power amplifier circuit structure, and is used to control the final power amplifier circuit structure to perform power amplification operation and detect the output power of the output end of the final power amplifier circuit structure.

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