Microwave short circuit

Abstract

The present invention provides a microwave short circuit device. The microwave short circuit device comprises: a waveguide structure; an adjustable short circuit structure, the adjustable short circuit structure is movably connected to the waveguide structure, and at least a part of the adjustable short circuit structure is located in the waveguide structure, the adjustable short circuit structure moves along the axial direction of the waveguide structure, and the adjustable short circuit structure has at least two independent short circuit surfaces, and the short circuit surfaces are movably arranged in the waveguide structure. The present invention solves the problem of poor phase adjustment accuracy of microwave short circuit devices in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of microwave equipment, and in particular, to a microwave short-circuit device. Background Art

[0002] With the development of technology, the application fields of electron linear accelerators are becoming more and more extensive, such as medical electron linear accelerators, irradiation electron linear accelerators, non-destructive testing accelerators, and scientific research accelerators. Different situations have different requirements for the energy of the accelerator. For example, medical accelerators need to select rays with different energies for treatment according to different tumors in different parts; irradiation accelerators need to select rays with different energies for irradiation according to the penetration depth of different goods; non-destructive testing accelerators also need to select rays with corresponding energy levels for photographing according to the thickness of different workpieces.

[0003] Currently, there are many methods to adjust the energy of an electron linear accelerator. One of them is to divide the accelerating tube into two sections, and by adjusting the power and phase of the input microwave of the second accelerating tube, the control of the electron energy is achieved. This method has flexible electron energy adjustment and a large adjustment range, and has been used in medical accelerators. The adjustment of the phase requires the use of an adjustable short-circuit surface.

[0004] The cross-section of the high-power short-circuit surface is mainly circular and rectangular. Usually, in order to prevent the short-circuit surface from contacting the waveguide, a choke structure (the short-circuit surface moves to make the microwave totally reflected) generally needs to be set on the waveguide or the moving body. The phase adjustment of the short-circuit surface is related to the position accuracy of the short-circuit surface. The higher the position accuracy, the more precise the phase control. Currently, most short-circuit surfaces have only one movable main body, which makes it difficult to adjust and control the phase. At the same time, the adjustment time of the short-circuit surface is too long, and the working efficiency is low. In addition, for most existing short-circuit surfaces, generally in order to cooperate with the standard waveguide, the cross-section is small, especially for rectangular waveguides, resulting in a decline in high-power performance and an increase in the probability of arcing.

[0005] That is to say, there is a problem of poor phase adjustment accuracy in the microwave short-circuit device in the prior art. Summary of the Invention

[0006] The main object of the present invention is to provide a microwave short-circuit device to solve the problem of poor phase adjustment accuracy in the microwave short-circuit device in the prior art.

[0007] To achieve the above object, the present invention provides a microwave short-circuit device, including: a waveguide structure; an adjustable short-circuit structure, the adjustable short-circuit structure is movably connected to the waveguide structure, and at least a part of the adjustable short-circuit structure is located inside the waveguide structure. The adjustable short-circuit structure moves along the axial direction of the waveguide structure. The adjustable short-circuit structure has at least two mutually independent short-circuit surfaces, and the short-circuit surfaces are movably arranged inside the waveguide structure.

[0008] Further, the areas of at least two short-circuit surfaces are different.

[0009] Further, one end of the adjustable short - circuit structure close to the inlet of the waveguide structure has a short - circuit plane.

[0010] Further, the adjustable short - circuit structure is spaced from the inner peripheral surface of the waveguide structure, and the outer peripheral surface of the adjustable short - circuit structure has a choke structure.

[0011] Further, the adjustable short - circuit structure includes: a first adjustable short - circuit breaker movably connected to the waveguide structure, and the end face of one end of the first adjustable short - circuit breaker close to the inlet of the waveguide structure serves as the short - circuit plane; a second adjustable short - circuit breaker movably connected to the waveguide structure or the first adjustable short - circuit breaker, and the end face of one end of the second adjustable short - circuit breaker close to the inlet of the waveguide structure serves as the short - circuit plane.

[0012] Further, the first adjustable short - circuit breaker is of a cylindrical structure, the second adjustable short - circuit breaker is movably arranged inside the first adjustable short - circuit breaker, the first adjustable short - circuit breaker is spaced from the inner peripheral surface of the waveguide structure, and the outer peripheral surface of the first adjustable short - circuit breaker has a choke structure.

[0013] Further, the second adjustable short - circuit breaker is of a columnar structure, the second adjustable short - circuit breaker is spaced from the first adjustable short - circuit breaker, and the outer peripheral surface of the second adjustable short - circuit breaker has a choke structure.

[0014] Further, the number of the second adjustable short - circuit breakers is at least one. When there is one second adjustable short - circuit breaker, the second adjustable short - circuit breaker is coaxially arranged with the first adjustable short - circuit breaker; or when there are multiple second adjustable short - circuit breakers, the multiple second adjustable short - circuit breakers are spaced and arranged inside the first adjustable short - circuit breaker.

[0015] Further, the second adjustable short - circuit breaker is of a cylindrical structure, and the adjustable short - circuit structure further includes a third adjustable short - circuit breaker which is columnar. The third adjustable short - circuit breaker is arranged inside the second adjustable short - circuit breaker, the end face of one end of the third adjustable short - circuit breaker close to the inlet of the waveguide structure serves as the short - circuit plane, the third adjustable short - circuit breaker is coaxially arranged with the second adjustable short - circuit breaker and the first adjustable short - circuit breaker, and the outer peripheral surface of the third adjustable short - circuit breaker has a choke structure.

[0016] Further, the waveguide structure includes: a rectangular waveguide; a circular waveguide, one end of the rectangular waveguide is connected and communicated with the circular waveguide, and the adjustable short - circuit structure is arranged inside the circular waveguide.

[0017] Further, the rectangular waveguide is angularly connected to the circular waveguide.

[0018] Further, the rectangular waveguide is perpendicular to the circular waveguide.

[0019] Further, one end of the circular waveguide far from the adjustable short - circuit structure has a matching adjustment groove recessed toward the side where the adjustable short - circuit structure is located.

[0020] Applying the technical solution of the present invention, the microwave short - circuit breaker includes a waveguide structure and an adjustable short - circuit structure. The adjustable short - circuit structure is movably connected to the waveguide structure, and at least a part of the adjustable short - circuit structure is located inside the waveguide structure. The adjustable short - circuit structure moves along the axial direction of the waveguide structure. The adjustable short - circuit structure has at least two independent short - circuit planes, and the short - circuit planes are movably arranged inside the waveguide structure.

[0021] By providing at least two independent short - circuit planes on the adjustable short - circuit structure, multiple short - circuit planes can move independently inside the waveguide structure to separately change the phase of the microwave incident into the waveguide structure. Of course, multiple short - circuit planes can also move synchronously to jointly change the position of the short - circuit planes, thereby being able to adjust the phase of the microwave within a large range and achieving a coarse adjustment of the phase of the microwave. Changing the position of a single short - circuit plane can adjust the phase of the microwave within a small range, achieving a fine adjustment of the phase of the microwave. At the same time, setting multiple independent short - circuit planes on the adjustable short - circuit structure can simultaneously achieve the coarse adjustment and fine adjustment of the phase of the microwave, greatly increasing the adjustment accuracy of the phase of the microwave. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0023] Figure 1 The structural schematic diagram of the microwave short - circuit breaker of an alternative embodiment of the present invention is shown.

[0024] Among them, the above - mentioned accompanying drawings include the following reference numerals:

[0025] 10. Waveguide structure; 11. Square waveguide; 12. Circular waveguide; 13. Matching adjustment groove; 20. Adjustable short - circuit structure; 21. Short - circuit plane; 22. Choke structure; 23. First adjustable short - circuit breaker; 24. Second adjustable short - circuit breaker. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] It should be pointed out that unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0028] In the present invention, unless otherwise specified, the orientation terms such as "upper, lower, top, bottom" generally refer to the directions shown in the drawings or to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contours of the respective components themselves, but the above orientation terms are not used to limit the present invention.

[0029] To solve the problem of poor phase adjustment accuracy of microwave short - circuit breakers in the prior art, the present invention provides a microwave short - circuit breaker.

[0030] As Figure 1 shown, the microwave short - circuit breaker includes a waveguide structure 10 and an adjustable short - circuit structure 20. The adjustable short - circuit structure 20 is movably connected to the waveguide structure 10, and at least a part of the adjustable short - circuit structure 20 is located inside the waveguide structure 10. The adjustable short - circuit structure 20 moves along the axial direction of the waveguide structure 10. The adjustable short - circuit structure 20 has at least two mutually independent short - circuit surfaces 21, and the short - circuit surfaces 21 are movably arranged inside the waveguide structure 10.

[0031] By providing at least two mutually independent short - circuit surfaces 21 on the adjustable short - circuit structure 20, the multiple short - circuit surfaces 21 can move independently inside the waveguide structure 10 to separately change the phase of the microwave incident into the waveguide structure 10. Of course, the multiple short - circuit surfaces 21 can also move synchronously to jointly change the positions of the short - circuit surfaces 21, thereby being able to adjust the phase of the microwave within a large range and realizing the coarse adjustment of the phase of the microwave. Changing the position of a single short - circuit surface 21 can adjust the phase of the microwave within a small range, realizing the fine adjustment of the phase of the microwave. At the same time, setting multiple mutually independent short - circuit surfaces 21 on the adjustable short - circuit structure 20 can simultaneously realize the coarse adjustment and fine adjustment of the phase of the microwave, greatly increasing the adjustment accuracy of the phase of the microwave.

[0032] Specifically, the areas of at least two short - circuit surfaces 21 are different. Such a setting makes the adjustment ranges of the phases of the two short - circuit surfaces 21 with different areas different, so as to realize the adjustment of different ranges of the phase, and thus the adjustment of the phase is more accurate, greatly avoiding the situation of repeated adjustment and increasing the adjustment efficiency.

[0033] As Figure 1 shown, one end of the adjustable short - circuit structure 20 close to the entrance of the waveguide structure 10 has a short - circuit surface 21. The short - circuit surface 21 can totally reflect the microwave incident on the short - circuit surface 21, so that the totally reflected microwave exits from the entrance of the waveguide structure 10 to change the phase of the microwave. The short - circuit surface 21 is arranged at one end of the adjustable short - circuit structure 20 close to the entrance of the waveguide structure 10, which is convenient for the short - circuit surface 21 to reflect the microwave.

[0034] As Figure 1As shown, the adjustable short - circuit structure 20 is spaced from the inner peripheral surface of the waveguide structure 10, and the outer peripheral surface of the adjustable short - circuit structure 20 has a choke structure 22. The adjustable short - circuit structure 20 is spaced from the inner peripheral surface of the waveguide structure 10 to ensure that the adjustable short - circuit structure 20 can move stably within the waveguide structure 10, avoiding friction between the adjustable short - circuit structure 20 and the waveguide structure 10, thereby avoiding the impact on the performance of the waveguide structure 10 and ensuring the stability of the operation of the waveguide structure 10 and the adjustable short - circuit structure 20. The setting of the choke structure 22 can prevent microwaves from flowing out through the gap between the adjustable short - circuit structure 20 and the inner peripheral surface of the waveguide structure 10, ensuring that the microwaves entering the waveguide structure 10 can all be reflected by the short - circuit surface 21 and then shoot towards the entrance of the waveguide structure 10 and flow out through the entrance of the waveguide structure 10.

[0035] It should be noted that there is a phase difference between the microwaves flowing into the waveguide structure 10 through the entrance of the waveguide structure 10 and the microwaves flowing out of the waveguide structure 10 through the entrance of the waveguide structure 10. By adjusting the position of the short - circuit surface 21, the magnitude of the phase difference can be adjusted.

[0036] As Figure 1 shown, the adjustable short - circuit structure 20 includes a first adjustable short - circuit breaker 23 and a second adjustable short - circuit breaker 24. The first adjustable short - circuit breaker 23 is movably connected to the waveguide structure 10, and the end face of the first adjustable short - circuit breaker 23 near the entrance of the waveguide structure 10 serves as the short - circuit surface 21; the second adjustable short - circuit breaker 24 is movably connected to the waveguide structure 10 or the first adjustable short - circuit breaker 23, and the end face of the second adjustable short - circuit breaker 24 near the entrance of the waveguide structure 10 serves as the short - circuit surface 21. By providing the first adjustable short - circuit breaker 23 and the second adjustable short - circuit breaker 24, two short - circuit surfaces 21 can be provided, and the position of the short - circuit surface 21 can be adjusted by the positions of the first adjustable short - circuit breaker 23 and the second adjustable short - circuit breaker 24, thereby adjusting the phase of the microwaves. The first adjustable short - circuit breaker 23 and the second adjustable short - circuit breaker 24 can move synchronously to synchronously adjust the positions of the two short - circuit surfaces 21 for a rough adjustment of the phase of the microwaves. Of course, the first adjustable short - circuit breaker 23 and the second adjustable short - circuit breaker 24 can move independently to independently adjust the positions of the two short - circuit surfaces 21 for a fine adjustment of the phase of the microwaves.

[0037] Of course, the areas of the short - circuit surface 21 on the first adjustable short - circuit breaker 23 and the short - circuit surface 21 on the second adjustable short - circuit breaker 24 can be different to adjust the phase of the microwaves within different ranges, greatly increasing the adjustment accuracy of the phase of the microwaves.

[0038] As Figure 1As shown, the first adjustable short-circuit device 23 has a cylindrical structure. The second adjustable short-circuit device 24 is movably arranged inside the first adjustable short-circuit device 23. The first adjustable short-circuit device 23 is spaced from the inner peripheral surface of the waveguide structure 10. The outer peripheral surface of the first adjustable short-circuit device 23 has a choke structure 22. The fact that the first adjustable short-circuit device 23 is spaced from the inner peripheral surface of the waveguide structure 10 can ensure that there is no friction between the first adjustable short-circuit device 23 and the inner peripheral surface of the waveguide structure 10, increasing the working stability of the first adjustable short-circuit device 23 and the waveguide structure 10. The setting of the choke structure 22 can prevent microwaves from flowing out from the gap between the first adjustable short-circuit device 23 and the inner peripheral surface of the waveguide structure 10, ensuring that the microwaves entering the waveguide structure 10 can all be reflected by the short-circuit surface 21 and then shoot towards the entrance of the waveguide structure 10 and flow out through the entrance of the waveguide structure 10.

[0039] As Figure 1 shown, the second adjustable short-circuit device 24 has a columnar structure. The second adjustable short-circuit device 24 is spaced from the first adjustable short-circuit device 23. The outer peripheral surface of the second adjustable short-circuit device 24 has a choke structure 22. Such a setting facilitates the independent movement of the first adjustable short-circuit device 23 and the second adjustable short-circuit device 24 to avoid friction between the first adjustable short-circuit device 23 and the second adjustable short-circuit device 24, increasing the working stability of the first adjustable short-circuit device 23 and the second adjustable short-circuit device 24. The setting of the choke structure 22 can effectively prevent microwaves from flowing out from the gap between the second adjustable short-circuit device 24 and the inner peripheral surface of the first adjustable short-circuit device 23, ensuring that the microwaves entering the waveguide structure 10 can all be reflected by the short-circuit surface 21 and then shoot towards the entrance of the waveguide structure 10 and flow out through the entrance of the waveguide structure 10.

[0040] Specifically, the outlet end of the waveguide structure 10 has an outwardly turned convex edge. The outwardly turned convex edge has a sliding hole. One side of the first adjustable short-circuit device 23 close to the outlet end of the waveguide structure 10 has a sliding rib. The sliding rib extends from the first adjustable short-circuit device 23 towards the waveguide structure 10, and a part of the sliding rib bends towards the entrance of the waveguide structure 10 and extends into the sliding hole, enabling the first adjustable short-circuit device 23 to move relative to the waveguide structure 10. Similarly, the movement principle of the second adjustable short-circuit device 24 is the same, which will not be elaborated here one by one.

[0041] Of course, the movement of the first adjustable short-circuit device 23 can be manually controlled or machine-controlled.

[0042] Embodiment 1

[0043] As Figure 1As shown, there is at least one second adjustable short-circuit breaker 24. When there is one second adjustable short-circuit breaker 24, the second adjustable short-circuit breaker 24 is coaxially arranged with the first adjustable short-circuit breaker 23. Such an arrangement makes the area of the short-circuit surface 21 of the first adjustable short-circuit breaker 23 larger than that of the short-circuit surface 21 of the second adjustable short-circuit breaker 24, so that the first adjustable short-circuit breaker 23 serves as a coarse adjustment structure to coarsely adjust the phase of the microwave, while the second adjustable short-circuit breaker 24 serves as a fine adjustment structure to finely adjust the phase of the microwave. Such an arrangement greatly increases the adjustment accuracy of the phase of the microwave and facilitates the regulation of the phase of the microwave.

[0044] As Figure 1 As shown, the waveguide structure 10 includes a rectangular waveguide 11 and a circular waveguide 12. One end of the rectangular waveguide 11 is connected to and communicates with the circular waveguide 12. The adjustable short-circuit structure 20 is arranged inside the circular waveguide 12. Such an arrangement converts the TE10 mode of the rectangular waveguide into the TM01 mode of the circular waveguide. The electric and magnetic fields on the inner surface of the circular waveguide 12 are relatively low, which can greatly reduce the probability of arcing on the short-circuit surface 21 and improve the stability of the operation of the microwave short-circuit breaker.

[0045] It should be noted that the cross-sectional area of the rectangular waveguide 11 is smaller than that of the circular waveguide 12, which can effectively reduce the electric and magnetic fields inside the circular waveguide 12, so as to greatly reduce the probability of arcing on the short-circuit surface 21.

[0046] Optionally, the rectangular waveguide 11 is angularly connected to the circular waveguide 12. Such an arrangement facilitates the transition from the rectangular waveguide 11 to the circular waveguide 12, and at the same time has less restrictive effect on the size of the circular waveguide 12, which is convenient for using a circular waveguide 12 with a larger cross-sectional area, thereby greatly reducing the probability of arcing on the short-circuit surface 21 and ensuring the stable operation of the microwave short-circuit breaker.

[0047] In Figure 1 In the specific embodiment shown, the rectangular waveguide 11 is perpendicular to the circular waveguide 12. Such an arrangement facilitates the connection between the rectangular waveguide 11 and the circular waveguide 12, and at the same time a circular waveguide 12 with a larger cross-sectional area can be used to reduce the probability of arcing on the short-circuit surface 21 and ensure the stability of the operation of the microwave short-circuit breaker.

[0048] As Figure 1As shown, one end of the circular waveguide 12 away from the adjustable short - circuit structure 20 has a matching adjustment groove 13 that is recessed toward the side where the adjustable short - circuit structure 20 is located. The setting of the matching adjustment groove 13 can ensure that when the waveguide structure 10 is adjusted, all the microwaves can flow out from the outlet of the circular waveguide 12 after entering the circular waveguide 12 from the square waveguide 11, avoiding the accumulation of microwaves in the waveguide structure 10 and protecting the stability of the operation of the waveguide structure 10. The depth a of the matching adjustment groove 13 is adjusted to make all the microwaves flow out from the outlet of the circular waveguide 12. At the same time, when there is no short - circuit surface 21, the microwaves in the square waveguide 11 can all be transmitted into the circular waveguide 12, avoiding the formation of a resonant cavity at the short - circuit surface 21 and reducing the loss at the short - circuit surface 21.

[0049] Embodiment Two

[0050] The difference from Embodiment One is the number of the second adjustable short - circuiters 24.

[0051] In this embodiment, when there are multiple second adjustable short - circuiters 24, the multiple second adjustable short - circuiters 24 are arranged at intervals within the first adjustable short - circuiter 23. The setting of the multiple second adjustable short - circuiters 24 can further increase the adjustment accuracy of the phase of the microwaves, facilitating the control of the phase of the microwaves and greatly improving the phase control accuracy.

[0052] Embodiment Three

[0053] The difference from Embodiment One is that there is also a third adjustable short - circuiter.

[0054] In this embodiment, the second adjustable short - circuiter 24 is of a cylindrical structure. The adjustable short - circuit structure 20 further includes a third adjustable short - circuiter. The third adjustable short - circuiter is columnar. The third adjustable short - circuiter is arranged within the second adjustable short - circuiter 24. The end face of the third adjustable short - circuiter close to the inlet of the waveguide structure 10 serves as the short - circuit surface 21. The third adjustable short - circuiter is coaxially arranged with the second adjustable short - circuiter 24 and the first adjustable short - circuiter 23. The outer peripheral surface of the third adjustable short - circuiter has a choke structure 22. Such a setting further increases the adjustment accuracy of the phase of the microwaves, facilitating the control of the phase of the microwaves and greatly improving the phase control accuracy.

[0055] Obviously, the above - described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0057] It should be noted that the terms "first", "second", etc. in the specification, claims and above-mentioned drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A microwave short circuit device, characterized in that: include: Waveguide structure (10); An adjustable short-circuit structure (20), the adjustable short-circuit structure (20) being movably connected to the waveguide structure (10), and at least a portion of the adjustable short-circuit structure (20) being located within the waveguide structure (10), the adjustable short-circuit structure (20) moving along the axial direction of the waveguide structure (10), the adjustable short-circuit structure (20) having at least two mutually independent short-circuit surfaces (21), the short-circuit surfaces (21) being movably arranged within the waveguide structure (10); At least two of the short-circuit paths (21) have different areas; The adjustable short-circuit structure (20) comprises: A first adjustable short circuit device (23), the first adjustable short circuit device (23) being movably connected to the waveguide structure (10), and an end surface of the first adjustable short circuit device (23) close to an entrance of the waveguide structure (10) serving as the short-circuit surface (21); a second adjustable short circuit device (24), the second adjustable short circuit device (24) being movably connected to the waveguide structure (10) or the first adjustable short circuit device (23), and an end surface of the second adjustable short circuit device (24) close to an entrance of the waveguide structure (10) serving as the short-circuit surface (21); The first adjustable short circuit device (23) is a cylindrical structure, the second adjustable short circuit device (24) is movably arranged inside the first adjustable short circuit device (23), the first adjustable short circuit device (23) is spaced apart from the inner peripheral surface of the waveguide structure (10), and the outer peripheral surface of the first adjustable short circuit device (23) has a choke structure (22).

2. The microwave short circuit device according to claim 1, characterized in that: The adjustable short-circuit structure (20) has a short-circuit surface (21) at one end close to the entrance of the waveguide structure (10).

3. The microwave short circuit device according to claim 1, characterized in that: The adjustable short-circuit structure (20) is spaced apart from the inner circumference of the waveguide structure (10), and the outer circumference of the adjustable short-circuit structure (20) has a choke structure (22).

4. The microwave short circuit device according to claim 1, characterized in that: The second adjustable short circuit device (24) is a columnar structure; the second adjustable short circuit device (24) is spaced apart from the first adjustable short circuit device (23); and the outer peripheral surface of the second adjustable short circuit device (24) has a choke structure (22).

5. The microwave short-circuiter according to claim 4, characterized in that: The second adjustable short circuit device (24) is at least one, When there is one second adjustable short circuit device (24), the second adjustable short circuit device (24) is coaxially arranged with the first adjustable short circuit device (23); or When there are a plurality of the second adjustable short circuit devices (24), the plurality of the second adjustable short circuit devices (24) are arranged at intervals inside the first adjustable short circuit device (23).

6. The microwave short circuit device according to claim 1, characterized in that: The second adjustable short circuit device (24) is a cylindrical structure. The adjustable short circuit structure (20) further comprises a third adjustable short circuit device, which is columnar and arranged inside the second adjustable short circuit device (24). The end surface of the third adjustable short circuit device close to the entrance of the waveguide structure (10) serves as the short circuit surface (21). The third adjustable short circuit device is coaxially arranged with the second adjustable short circuit device (24) and the first adjustable short circuit device (23). The outer peripheral surface of the third adjustable short circuit device has a choke structure (22).

7. The microwave short circuit device according to any one of claims 1 to 6, characterized in that: The waveguide structure (10) comprises: Square waveguide (11); A circular waveguide (12), one end of the square waveguide (11) is connected to and communicates with the circular waveguide (12), and the adjustable short-circuit structure (20) is arranged in the circular waveguide (12).

8. The microwave short-circuiter according to claim 7, characterized in that: The square waveguide (11) is connected to the circular waveguide (12) at an angle.

9. The microwave short-circuiter according to claim 8, characterized in that: The square waveguide (11) is perpendicular to the circular waveguide (12).

10. The microwave short-circuiter according to claim 8, characterized in that: One end of the circular waveguide (12) away from the adjustable short-circuit structure (20) has a matching adjustment groove (13) that is recessed toward the side where the adjustable short-circuit structure (20) is located.

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