Radio frequency input protection structure and device for solid-state power source

Abstract

The utility model discloses a radio frequency input protection structure and device for a solid-state power source, and relates to the technical field of solid-state power sources, the input protection structure is electrically connected with a radio frequency input end of the solid-state power source, and the input protection structure comprises a first attenuator which is electrically connected with the radio frequency input end, and a second attenuator which is electrically connected with the radio frequency input end; the first attenuator is used for performing pi-type attenuation on an input radio frequency signal transmitted by the radio frequency input end; and a first amplification circuit. According to the utility model, the limiting circuit, the filter circuit and the plurality of attenuators are arranged in the input protection structure, so that filtering and amplitude limiting protection processing can be carried out on the radio frequency signal input by the radio frequency input end, the stability of the radio frequency signal is ensured, and the situation that the subsequent power amplifier structure is damaged due to the instability of the input radio frequency signal is reduced. Therefore, the requirement that the signal is stable when the radio frequency signal is input is effectively met.

Description

Technical Field

[0001] The utility model relates to the technical field of solid-state power sources, in particular to a radio frequency input protection structure and device for solid-state power sources. Background Art

[0002] Solid-state power sources are a crucial component of particle accelerators, primarily providing radio frequency (RF) power. Therefore, while meeting test requirements and specifications, they must also be safe, stable, reliable, have a long lifespan, and be easy to maintain.

[0003] Since the solid-state power source device performs power amplification processing on the radio frequency signal, in order to ensure the stability and reliability of the radio frequency signal, it is necessary to ensure the signal stability when the radio frequency signal is input. Utility Model Content

[0004] The purpose of the utility model is to meet the requirement of ensuring signal stability when inputting radio frequency signals, and to propose a radio frequency input protection structure and device for a solid-state power source.

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

[0006] In a first aspect, the present invention provides a radio frequency input protection structure for a solid-state power source, wherein the input protection structure is electrically connected to a radio frequency input terminal of the solid-state power source, and comprises:

[0007] a first attenuator, the first attenuator being electrically connected to the RF input terminal, and configured to perform π-type attenuation on an input RF signal transmitted from the RF input terminal;

[0008] a first amplifier circuit, one end of the first amplifier circuit being electrically connected to the first attenuator, the first amplifier circuit being configured to perform a first signal gain amplification process on the input RF signal after attenuation by the first attenuator;

[0009] a second attenuator, one end of the second attenuator being electrically connected to the other end of the first amplifying circuit, the second attenuator being configured to adjust the signal amplitude of the input RF signal after amplification by the first amplifying circuit;

[0010] a limiting circuit, one end of which is electrically connected to the other end of the second attenuator, the limiting circuit being configured to filter and limit the signal amplitude of the input RF signal processed by the second attenuator;

[0011] a third attenuator, one end of the third attenuator being electrically connected to the limiter circuit, and the third attenuator being configured to filter and limit the signal amplitude of the input radio frequency signal processed by the limiter circuit;

[0012] a radio frequency switching circuit, one end of which is electrically connected to the other end of the third attenuator, and configured to perform radio frequency switching on the input radio frequency signal processed by the limiter circuit;

[0013] a filter circuit, one end of which is electrically connected to the RF switch circuit, the filter circuit being configured to remove harmonics and clutter outside the bandwidth of the input RF signal processed by the RF switch circuit;

[0014] A second amplifier circuit, one end of the second amplifier circuit is connected to the other end of the filter circuit, and the second amplifier circuit performs second signal amplification processing on the input radio frequency signal processed by the filter circuit.

[0015] In one feasible solution, it also includes:

[0016] A first voltage stabilizing circuit, wherein one end of the first voltage stabilizing circuit is electrically connected to a power supply, and the other end of the first voltage stabilizing circuit is electrically connected to the first amplifying circuit and the second amplifying circuit respectively.

[0017] In a feasible solution, the first voltage stabilizing circuit includes: a plurality of filter capacitors and voltage stabilizing diodes.

[0018] In a feasible solution, the limiting circuit is a limiter.

[0019] In one feasible solution, it also includes:

[0020] A DC blocking capacitor is electrically connected to the output end of the second amplifier circuit, and is used to block a DC signal from the input radio frequency signal processed by the second amplifier circuit.

[0021] A second aspect of the present invention provides a solid-state power source device, which adopts a radio frequency input protection structure for a solid-state power source as described in any one of the first aspects.

[0022] The beneficial effects of the utility model are:

[0023] This utility model implements filtering and amplitude limiting protection for the RF signal inputted by the RF input terminal by providing a limiting circuit, a filtering circuit, and multiple attenuators within the input protection structure. This ensures the stability of the RF signal and reduces the risk of subsequent damage to the power amplifier structure caused by unstable input RF signals. This effectively meets the requirement for signal stability when inputting RF signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the connection structure of a radio frequency input protection structure for a solid-state power source provided in an embodiment of the present utility model;

[0025] Figure 2 This is a circuit connection diagram of a radio frequency input protection structure for a solid-state power source provided in an embodiment of the present utility model;

[0026] Figure 3 This is a schematic diagram of a first voltage stabilizing circuit of a radio frequency input protection structure for a solid-state power source provided in an embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of a first amplifier circuit and a limiting circuit of a radio frequency input protection structure for a solid-state power source provided in an embodiment of the present utility model;

[0028] Figure 5 This is a schematic diagram of a radio frequency switch circuit, a filter circuit, and a second amplifier circuit of a radio frequency input protection structure for a solid-state power source provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Example

[0034] Reference Figures 1 to 5In this embodiment, in order to meet the requirement of ensuring signal stability when inputting a radio frequency signal, a radio frequency input protection structure for a solid-state power source is provided. The input protection structure is electrically connected to the radio frequency input terminal of the solid-state power source. The input protection structure is used to transmit and access the radio frequency signal and then filter and limit it. Specifically, the input protection structure includes: a first attenuator, a first amplifier circuit, a second attenuator, a limiter circuit, a third attenuator, a radio frequency switching circuit, a filter circuit, and a second amplifier circuit. The first attenuator is electrically connected to the radio frequency input terminal. The first attenuator is used to perform π-type attenuation on the input radio frequency signal transmitted from the radio frequency input terminal, so that the first attenuator reduces the input standing wave ratio of the input radio frequency signal. One end of the first amplifier circuit can be electrically connected to the first attenuator through a DC blocking capacitor. The first amplifier circuit is used to perform a first signal gain amplification process on the input radio frequency signal after attenuation by the first attenuator. One end of the second attenuator can be electrically connected to the other end of the first amplifier circuit via a DC blocking capacitor. The second attenuator is used to adjust the signal amplitude of the input RF signal after amplification by the first amplifier circuit so that the input RF signal processed by the second attenuator meets the clipping level requirements of the subsequent clipping circuit. One end of the clipping circuit is electrically connected to the other end of the second attenuator. The clipping circuit is used to filter and limit the signal amplitude of the input RF signal after processing by the second attenuator to prevent damage to subsequent components caused by excessive input power of the input RF signal. One end of the third attenuator can be electrically connected to the clipping circuit via a DC blocking capacitor. The third attenuator is used to filter and limit the signal amplitude of the input RF signal after processing by the clipping circuit to prevent damage to subsequent components caused by excessive input power of the input RF signal processed by the clipping circuit. One end of the RF switching circuit is electrically connected to the other end of the third attenuator via a DC blocking capacitor. The RF switching circuit is used to perform RF switching on and off the input RF signal after processing by the clipping circuit. One end of the filter circuit can be electrically connected to the RF switch circuit via a DC blocking capacitor. The filter circuit is used to remove out-of-band harmonics and spurious waves from the input RF signal processed by the RF switch circuit. One end of the second amplifier circuit can be connected to the other end of the filter circuit via a DC blocking capacitor. The other end of the second amplifier circuit can be electrically connected to other subsequent circuits in the solid-state power source via a DC blocking capacitor, so that the second amplifier circuit can perform second signal amplification processing on the input RF signal processed by the filter circuit, and the DC signal is isolated from the input RF signal processed by the second amplifier circuit via a DC blocking capacitor, and then the input RF signal is output.To ensure stable power supply for the signal amplification of the input protection structure, a first voltage stabilizing circuit is also provided. One end of the first voltage stabilizing circuit can be electrically connected to a power supply, and the other end of the first voltage stabilizing circuit is electrically connected to the first and second amplifier circuits, respectively. In other words, in this embodiment, by providing a limiting circuit, a filtering circuit, and multiple attenuators within the input protection structure, filtering and amplitude limiting protection are implemented for the RF signal inputted at the RF input terminal. This ensures RF signal stability and reduces the risk of subsequent damage to the power amplifier structure caused by unstable input RF signals. This effectively meets the requirement for signal stability when inputting RF signals.

[0035] Specifically, refer to Figure 2 and Figure 3 The first voltage-stabilizing circuit also includes: multiple filter capacitors and a voltage-stabilizing diode, so that the power supply voltage in the power supply module passes through the multiple filter capacitors and enters the voltage-stabilizing diode, and the DC voltage output by the voltage-stabilizing diode passes through the multiple filter capacitors and then powers the first amplifier circuit and the second amplifier circuit through the inductor.

[0036] In this embodiment, the amplitude limiting circuit is a limiter. Specifically, the amplitude limiting circuit can select a corresponding limiter according to actual power usage.

[0037] On the other hand, the present invention also provides a solid-state power source device, which adopts the input protection structure described above. By adopting the above-mentioned input protection structure, the device achieves filtering and limiting protection processing of the radio frequency signal input to the radio frequency input end of the device, thereby reducing the occurrence of damage to the subsequent power amplifier structure due to unstable input radio frequency signal.

[0038] 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 radio frequency input protection structure for a solid-state power source, wherein the input protection structure is electrically connected to the radio frequency input terminal of the solid-state power source, characterized in that: include: a first attenuator, the first attenuator being electrically connected to the RF input terminal, and configured to perform π-type attenuation on an input RF signal transmitted from the RF input terminal; a first amplifier circuit, one end of the first amplifier circuit being electrically connected to the first attenuator, the first amplifier circuit being configured to perform a first signal gain amplification process on the input RF signal after attenuation by the first attenuator; a second attenuator, one end of the second attenuator being electrically connected to the other end of the first amplifying circuit, the second attenuator being configured to adjust the signal amplitude of the input RF signal after amplification by the first amplifying circuit; a limiting circuit, one end of which is electrically connected to the other end of the second attenuator, the limiting circuit being configured to filter and limit the signal amplitude of the input RF signal processed by the second attenuator; a third attenuator, one end of the third attenuator being electrically connected to the limiter circuit, and the third attenuator being configured to filter and limit the signal amplitude of the input radio frequency signal processed by the limiter circuit; a radio frequency switching circuit, one end of which is electrically connected to the other end of the third attenuator, and configured to perform radio frequency switching on the input radio frequency signal processed by the limiter circuit; a filter circuit, one end of which is electrically connected to the RF switch circuit, the filter circuit being configured to remove harmonics and clutter outside the bandwidth of the input RF signal processed by the RF switch circuit; A second amplifier circuit, one end of the second amplifier circuit is connected to the other end of the filter circuit, and the second amplifier circuit performs second signal amplification processing on the input radio frequency signal processed by the filter circuit.

2. The radio frequency input protection structure for a solid-state power source according to claim 1, characterized in that: Also includes: A first voltage stabilizing circuit, wherein one end of the first voltage stabilizing circuit is electrically connected to a power supply, and the other end of the first voltage stabilizing circuit is electrically connected to the first amplifying circuit and the second amplifying circuit respectively.

3. The radio frequency input protection structure for a solid-state power source according to claim 2, characterized in that: The first voltage stabilizing circuit includes: a plurality of filter capacitors and voltage stabilizing diodes.

4. The radio frequency input protection structure for a solid-state power source according to claim 1, characterized in that: The amplitude limiting circuit is a limiter.

5. The radio frequency input protection structure for a solid-state power source according to claim 1, characterized in that: Also includes: A DC blocking capacitor is electrically connected to the output end of the second amplifier circuit, and is used to block a DC signal from the input radio frequency signal processed by the second amplifier circuit.

6. A solid-state power source device, characterized in that: A radio frequency input protection structure for a solid-state power source according to any one of claims 1 to 5 is adopted.

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