Coaxial waveguide conversion device, microwave device, and communication device

Abstract

The application provides a coaxial waveguide conversion device, a microwave device and a communication device, and relates to the technical field of electromagnetic transmission. The coaxial waveguide conversion device comprises a waveguide having a waveguide cavity and a mounting hole, and a coaxial output device having a coupling body and a transmission antenna; the coupling body has a coupling cavity, and the transmission antenna is at least partially located in the coupling cavity; the coupling body is inserted into the mounting hole and has a radiation part exposed to the waveguide cavity, and the transmission antenna located in the coupling cavity is connected to the radiation part. The electromagnetic wave energy transmitted by the transmission antenna in the coaxial waveguide conversion device provided by the application can be radiated into the waveguide cavity through the current change of the surface of the radiation part, so that the conversion of electromagnetic waves from a coaxial mode to a waveguide mode is realized, and the coupling area is increased and the insertion loss is reduced.

Description

Technical Field

[0001] This application relates to the field of electromagnetic transmission technology, and in particular to a coaxial waveguide conversion device, microwave equipment, and communication equipment. Background Technology

[0002] In many fields involving electromagnetic transmission, such as microwave heating and communication signal transmission, it is necessary to convert between coaxial mode and waveguide mode electromagnetic wave signals. Taking microwave ovens as an example, some microwave ovens output microwaves via a coaxial line and transmit them via a waveguide. Therefore, a conversion structure is needed to achieve microwave mode conversion between the coaxial line and the waveguide. Existing coaxial-waveguide conversions typically use a three-pin coupling structure, but the coupling of the three-pin coupling structure is not high, which can easily lead to excessive insertion loss. Summary of the Invention

[0003] The main technical problem addressed in this application is how to reduce the insertion loss of coaxial waveguide conversion structures.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a coaxial waveguide conversion device, comprising:

[0005] A waveguide having a waveguide cavity and mounting holes communicating with the waveguide cavity;

[0006] A coaxial output device having a coupler and a transmission antenna, the coupler having a coupling cavity, and the transmission antenna being at least partially located within the coupling cavity;

[0007] The coupler is inserted into the mounting hole and has a radiating part exposed to the waveguide cavity. The transmission antenna located in the coupling cavity is connected to the radiating part. The electromagnetic wave energy transmitted by the transmission antenna can be radiated into the waveguide cavity through the current change on the surface of the radiating part, so as to realize the conversion of electromagnetic waves from coaxial mode to waveguide mode.

[0008] The coupling body has a gap between itself and the wall of the mounting hole. The coaxial waveguide conversion device also includes a fixing component that fixes the coupling body to the waveguide and covers the gap.

[0009] The coupler can move relative to the fixed component to adjust the length of the coupler extending into the waveguide cavity.

[0010] The fasteners can be either integrated or separate.

[0011] The coupler is detachably connected to the wall of the mounting hole.

[0012] The surface of the radiating part is smooth.

[0013] The coupling body also includes an insulating part, which is connected to the radiating part and is at least partially disposed opposite to the wall of the mounting hole.

[0014] The coupler also includes a sealing part to prevent electromagnetic wave leakage. The radiating part, the insulating part and the sealing part are connected in sequence and surround each other to form a coupling cavity.

[0015] The waveguide has wide walls, narrow walls, and short-circuit walls that cooperate to form a rectangular waveguide, and the mounting hole is located on one of the wide walls.

[0016] The distance between the central axis of the radiating section and the short-circuit wall is between 20mm and 25mm.

[0017] The coaxial output device is either a magnetron die or a device adapted to the magnetron die, in order to accurately detect the reflection coefficient of the coaxial input port of the magnetron.

[0018] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a microwave device, including the above-mentioned coaxial waveguide conversion device, and to use the coaxial waveguide conversion device to convert coaxial mode microwaves into waveguide mode microwaves.

[0019] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a communication device, including the above-mentioned coaxial waveguide conversion device, and to use the coaxial waveguide conversion device to realize electromagnetic signal transmission.

[0020] The advantages of the coaxial waveguide conversion device, microwave equipment, and communication equipment provided in this application, which differ from existing technologies, are as follows:

[0021] This application places the transmission antenna of the coaxial output device inside the coupling cavity of the coupler and connects it to the radiating part of the coupler exposed to the waveguide cavity. Thus, the electromagnetic wave energy transmitted by the transmission antenna can be radiated into the waveguide cavity through the current change on the surface of the radiating part, realizing the conversion of electromagnetic waves from coaxial mode to waveguide mode. Compared with conventional metal probe coupling, this application uses a coupler with a coupling cavity as the coupling structure, which is beneficial to increase the coupling area and reduce insertion loss. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0023] Figure 1 This is a schematic diagram of the coaxial waveguide conversion device provided in some embodiments of this application from a first-view perspective;

[0024] Figure 2 yes Figure 1 A schematic diagram of the coaxial waveguide conversion device in the embodiment from a second perspective;

[0025] Figure 3 yes Figure 1 A schematic diagram of the coaxial waveguide conversion device in the embodiment from a third-person perspective;

[0026] Figure 4 yes Figure 1 A schematic diagram of the coaxial waveguide conversion device in the embodiment from a fourth-view perspective;

[0027] Figure 5 This is a cross-sectional structural schematic diagram of a coaxial waveguide conversion device provided in some embodiments of this application;

[0028] Figure 6 This is a cross-sectional structural schematic diagram of a coaxial waveguide conversion device provided in some other embodiments of this application;

[0029] Figure 7 This is an exploded structural diagram of a coaxial waveguide conversion device provided in some embodiments of this application;

[0030] Figure 8 This is an exploded structural diagram of a coaxial waveguide conversion device provided in other embodiments of this application;

[0031] Figure 9 These are schematic diagrams of the structure of microwave devices provided in some embodiments of this application;

[0032] Figure 10 This is a schematic diagram of the structure of a communication device provided in some embodiments of this application. Detailed Implementation

[0033] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] This application provides a coaxial waveguide conversion device that can be used to convert coaxial mode electromagnetic waves into waveguide mode electromagnetic waves. Specifically, electromagnetic waves have three waveguide forms in transmission lines: transverse electromagnetic waves (TEM mode), transverse electric waves (TE mode), and transverse magnetic waves (TM mode). The dominant mode of waveguide propagation is TE mode, while the dominant mode of coaxial line propagation is TEM mode. The coaxial waveguide conversion device can realize the conversion between the two propagation modes.

[0036] Please refer to the following: Figures 1 to 4 , Figure 1 This is a schematic diagram of the coaxial waveguide conversion device provided in some embodiments of this application from a first-view perspective. Figure 2 yes Figure 1 A schematic diagram of the coaxial waveguide conversion device in the embodiment from a second-view perspective. Figure 3 yes Figure 1 A schematic diagram of the coaxial waveguide conversion device in the embodiment from a third-person perspective. Figure 4 yes Figure 1 A schematic diagram of the coaxial waveguide conversion device in the embodiment from a fourth-angle perspective.

[0037] In some embodiments, the coaxial waveguide conversion device 10 includes a waveguide 100 and a coupler 200. The waveguide 100 is a structure for directional guidance of electromagnetic waves, specifically a hollow metal tube for transmitting radio waves, having a waveguide cavity 101 and a mounting hole 102 communicating with the waveguide cavity 101. The coupler 200 is inserted into the mounting hole 102 for converting electromagnetic waves. The mounting hole 102 can be circular, elliptical, polygonal, or other shapes. In one embodiment, the mounting hole 102 is designed with dimensions of 86.4 mm * 43.2 mm.

[0038] Optionally, waveguide 100 has a wide wall 110, a narrow wall 120, and a short-circuit wall 130 that cooperate to form a rectangular waveguide. Specifically, the wide wall 110, narrow wall 120, and short-circuit wall 130 are all rectangular walls. Waveguide 100 includes two opposite and parallel wide walls 110 and two opposite and parallel narrow walls 120, which are perpendicularly connected to form a cavity with openings at both ends. The short-circuit wall 130 is located at one end of the cavity and is perpendicularly connected to the same side of each wide wall 110 and narrow wall 120 to block the opening at one end of the cavity. Thus, the wide wall 110, narrow wall 120, and short-circuit wall 130 enclose and form a waveguide cavity 101.

[0039] The mounting hole 102 can be provided on one wide wall 110 of the waveguide 100. That is, the coupler 200 passes through one wide wall 110 of the waveguide 100, so that one end of the coupler 200 inserted into the waveguide 100 can be exposed to the waveguide cavity 101. It should be noted that there is a gap between the coupler 200 passing through one wide wall 110 of the waveguide 100 and the other wide wall 110 of the waveguide 100.

[0040] The waveguide 100 may also have a connection portion 140 for connecting to external devices. The connection portion 140 is located at the end of the wide wall 110 and narrow wall 120 away from the short-circuit wall 130, and is disposed on the outer surface of the wide wall 110 and narrow wall 120, i.e., on the surface facing away from the waveguide cavity 101. The connection portion 140 may be a flange, used to connect the waveguide 100 to an external waveguide. Of course, the connection portion 140 may also be other forms of connection structure.

[0041] Optionally, the wide wall 110, narrow wall 120, short-circuit wall 130 and connector 140 of waveguide 100 are integrally formed.

[0042] In some embodiments, the coupler 200 has a radiating portion 210 exposed to the waveguide cavity 101 for radiating electromagnetic wave energy into the waveguide cavity 101 to achieve the conversion of electromagnetic waves from coaxial mode to waveguide mode. The radiating portion 210 is the end of the coupler 200 inserted into the waveguide cavity 101, and is made of a conductive material, typically a conductive metal such as copper or steel, but can also be a non-metallic conductive material such as graphite.

[0043] The surface of the radiating part 210 is smooth, meaning it has no obvious sharp edges. Specifically, the radiating part 210 can be cylindrical, elliptical cylindrical, or have side walls without obvious sharp edges. The bottom wall of the radiating part 210, that is, the end wall of the other wide wall 110 opposite to the wide wall 110 through which the coupler 200 passes, can have its sharp edges removed by chamfering at the connection point with the side wall of the radiating part 210. By designing the radiating part 210 to have a smooth surface, damage to the radiating part 210 during electromagnetic wave conversion can be prevented.

[0044] It should be understood that the terms "comprising" and "having," and any variations thereof, used in this application and the appended claims, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0045] It should be noted that the orientations or positional relationships indicated in this application are based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships that are usually placed when the product of this application is used. They are only for the purpose of facilitating the description of the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] Please see Figure 5 , Figure 5 This is a cross-sectional structural schematic diagram of a coaxial waveguide conversion device provided in some embodiments of this application.

[0047] In some embodiments, the coaxial waveguide conversion device 10 includes a coaxial output device 300, which includes a transmission antenna 400 and the aforementioned coupler 200. The coupler 200 has a coupling cavity 201, and the transmission antenna 400 is at least partially located within the coupling cavity 201 and connected to the coupler 200, so that the electromagnetic wave energy transmitted by the transmission antenna 400 can be radiated into the waveguide cavity 101 through the coupler 200.

[0048] The coupler 200 may have a port 202 at one end outside the waveguide cavity 101, which is connected to the coupling cavity 201. This port 202 is used to enable the transmission antenna 400 located inside the coupling cavity 201 to be connected to an external transmission line through the port 202, or to enable the transmission antenna 400 to partially extend into the coupling cavity 201 through the port 202.

[0049] The transmission antenna 400 may be partially located within the coupling cavity 201 and extend outside the coupling cavity 201 via port 202. Alternatively, the transmission antenna 400 may be entirely located within the coupling cavity 201 and connected to an external transmission line via port 202.

[0050] It should be noted that the aperture of the openings on the coupler 200, such as port 202, needs to be controlled to a size that electromagnetic waves cannot penetrate, in order to prevent electromagnetic wave leakage. The coupler 200 may also have openings other than port 202 as needed.

[0051] Optionally, the coupler 200 can be connected to the wall of the mounting hole 102 of the waveguide 100 to prevent electromagnetic wave leakage. The connection between the coupler 200 and the wall of the mounting hole 102 can be detachable, such as by pin, snap-fit, or threaded connection.

[0052] Please see Figure 6 , Figure 6 This is a cross-sectional structural schematic diagram of a coaxial waveguide conversion device provided in other embodiments of this application.

[0053] In some embodiments, a gap exists between the coupler 200 and the wall of the mounting hole 102 to facilitate the installation or removal of the coupler 200 on the waveguide 100. That is, the diameter of the mounting hole 102 is larger than the outer diameter of the portion of the coupler 200 inserted into the mounting hole 102. The coaxial waveguide conversion device 10 also includes a fixing member 500, which fixes the coupler 200 to the waveguide 100 and covers the gap to prevent electromagnetic wave leakage.

[0054] The coupler 200 can move relative to the fixing member 500 to adjust the length of the coupler 200 extending into the waveguide cavity 101. For example, the fixing member 500 can be threadedly connected to the coupler 200 and abut against the waveguide 100, so that the relative height between the coupler 200 and the fixing member 500 can be adjusted by rotating the coupler 200 or rotating the fixing member 500, thereby adjusting the length of the coupler 200 extending into the waveguide cavity 101. Alternatively, the fixing member 500 can be engaged with the coupler 200, and the relative height between the coupler 200 and the fixing member 500 can be adjusted by adjusting the engagement position, thereby controlling the length of the coupler 200 extending into the waveguide cavity 101. Of course, the fixing member 500 can also be designed with other structures to cooperate with the coupler 200.

[0055] The coaxial waveguide conversion device 10 provided in this application can adjust the standing wave ratio (SWR) parameter by adjusting the length of the coupler 200 extending into the waveguide cavity 101. Specifically, the length of the coupler 200 extending into the waveguide cavity 101 affects the S-parameter, which is a value calculated from the reflection coefficient and corresponds one-to-one with the reflection coefficient and the SWR parameter. Therefore, by adjusting the length of the coupler 200 extending into the waveguide cavity 101, the SWR parameter can be indirectly controlled. The length of the coupler 200 extending into the waveguide cavity 101 can also be understood as the relative height between the coupler 200 and the waveguide 100.

[0056] It should be noted that the length of the coupler 200 extending into the waveguide cavity 101 can also be adjusted in other ways, such as by replacing the coupler 200 with a different size as needed. Furthermore, the coaxial waveguide conversion device 10 provided in this application can also adjust the VSWR parameter by adjusting the thickness of the transmission antenna 400, and the thickness of the transmission antenna 400 will also affect the aforementioned S-parameters. The thickness of the transmission antenna 400 can be adjusted by replacing it with a different transmission antenna 400 as needed.

[0057] Please refer to the following: Figure 7 and Figure 8 , Figure 7 This is an exploded structural diagram of a coaxial waveguide conversion device provided in some embodiments of this application. Figure 8 This is an exploded structural diagram of a coaxial waveguide conversion device provided in other embodiments of this application.

[0058] In this embodiment, the fastener 500 can be integrally formed or separately formed. Specifically, the fastener 500 can be an integral structural component, in which case the fastener 500 can be placed on the waveguide 100 first, and then the coupler 200 can be installed on the fastener 500 and the waveguide 100. Alternatively, the fastener 500 can be a multi-component structural component, in which case the coupler 200 can be inserted into the waveguide 100 first, and then the fasteners 500 can be assembled to limit the position of the coupler 200. Those skilled in the art can choose any of these structures according to actual needs. It should be noted that the installation order of the coupler 200 and the fastener 500 is not limited to the above embodiments. The integrally formed fastener 500 can be installed after the coupler 200 is installed, and the separately formed fastener 500 can be installed before the coupler 200 is installed. The specific order can be selected according to the design structure and is not limited here.

[0059] The transmission antenna 400 can be installed in the coupler 200 before the coupler 200 is installed, so as to improve the installation efficiency.

[0060] It should be understood that the terminology used in this specification and appended claims is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this specification and appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. Similarly, in the description of this application, “a plurality” means two or more, unless otherwise expressly specified.

[0061] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections. Connection methods can include snap-fit ​​connections, magnetic connections, threaded connections, etc. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0062] Please continue reading. Figure 6 .

[0063] In some embodiments, the radiating portion 210 of the coupler 200 forms one end of the coupler 200 located in the waveguide cavity 101, and the transmission antenna 400 located in the coupling cavity 201 is connected to the radiating portion 210. The electromagnetic wave energy transmitted by the transmission antenna 400 can be radiated into the waveguide cavity 101 through the current change on the surface of the radiating portion 210, so as to realize the conversion of electromagnetic waves from coaxial mode to waveguide mode.

[0064] The transmission antenna 400 can be connected to the bottom wall of the radiating part 210 or to the side wall of the radiating part 210. The transmission antenna 400 can be coaxially arranged with the radiating part 210.

[0065] Optionally, the end of the transmission antenna 400 near the radiating part 210 is a tapered structure with a larger outer diameter at the end near the radiating part 210. The transmission antenna 400 can fix its tapered structure to the radiating part 210.

[0066] The transmission antenna 400 can be soldered to the radiating part 210, or it can be fixed to the radiating part 210 by other means such as adhesive bonding.

[0067] Optionally, the distance between the central axis of the radiating part 210 and the short-circuit wall 130 is between 20mm and 25mm, such as 20.5mm, 21.5mm, 22.5mm, 23.5mm, 24.5mm, etc. This distance can be controlled by pre-calculating the position of the mounting hole 102 on the waveguide 100 based on the dimensions of the coupler 200 and the waveguide 100, so that the distance between the central axis of the radiating part 210 and the short-circuit wall 130 is between 20mm and 25mm when the coupler 200 is mounted on the waveguide 100. The distance between the central axis of the radiating part 210 and the short-circuit wall 130 affects the reflection effect of the short-circuit wall 130. By controlling the distance to the aforementioned parameters, the electromagnetic wave transmission efficiency of the coaxial waveguide conversion device 10 can be effectively improved.

[0068] In some embodiments, the coupler 200 further includes an insulating portion 220 made of an insulating material, such as ceramic or rubber. The insulating portion 220 is connected to the radiating portion 210 and is at least partially disposed opposite to the wall of the mounting hole 102. Specifically, the insulating portion 220 may be located in the mounting hole 102, i.e., entirely disposed opposite to the wall of the mounting hole 102. The insulating portion 220 may also partially extend into the waveguide cavity 101 and / or partially be located outside the waveguide 100. By providing an insulating portion 220 connected to one end of the radiating portion 210, the flow of current from the surface of the radiating portion 210 to the portion of the coupler 200 located outside the waveguide 100 can be blocked.

[0069] The coupler 200 may also include a sealing portion 230 for preventing electromagnetic wave leakage. The radiating portion 210, the insulating portion 220, and the sealing portion 230 are sequentially connected and enclosed to form a coupling cavity 201. The sealing portion 230 may be made of a conductive material such as metal. The aforementioned port 202 may be formed on the sealing portion 230.

[0070] The coaxial waveguide converter 10 provided in this application can adjust the S-parameters of port 202 by adjusting at least one of the thickness of the transmission antenna 400 and the length of the radiating part 210 extending into the waveguide cavity 101, thereby meeting the requirement of a standing wave ratio (VSWR) of less than 1.1 and achieving port matching. Furthermore, the coaxial waveguide converter 10 radiates electromagnetic wave energy through the radiating part 210. Compared to conventional metal probe structures, the radiating part 210 has a larger surface area. Changes in the surface current of the radiating part 210 allow more electromagnetic wave energy transmitted in the transmission antenna 400 to be radiated into the waveguide 100, thereby improving coupling and reducing insertion loss. Therefore, the coaxial waveguide converter 10 provided in this application is simple, reliable, and capable of transmitting high-power microwaves.

[0071] In addition, the coaxial waveguide conversion device 10 can also receive the reflection coefficient.

[0072] Optionally, the coaxial output device 300 in this embodiment is a magnetron die, that is, the coaxial output device 300 is the output part of the magnetron (part of the A-side cap), which is equivalent to the magnetron outputting microwave energy. It can not only satisfy the function of coaxial conversion, but also detect the matching status of devices such as microwave ovens that use magnetrons as electromagnetic wave sources during actual operation.

[0073] The coaxial output 300 can also be a device adapted to the magnetron die to accurately detect the reflection coefficient of the magnetron's coaxial input port. Here, "adaptation" refers to mapping a hardware design concept to a specific device. For example, the coaxial output 300 could also be a model designed to be one-to-one with the magnetron die.

[0074] It should be noted that the magnetron is an active device, and its reflection coefficient cannot be directly detected. Through the above design, the coaxial waveguide conversion device 10 can effectively simulate a coaxial port output to the waveguide 100 similar to that of the magnetron. It can simulate the reflection coefficient of high-power devices after they are placed in the magnetron, and can detect the reflection coefficient of the magnetron input port at low power.

[0075] In summary, the coaxial waveguide conversion device 10 provided in this application can convert coaxial electromagnetic wave signals into waveguide electromagnetic wave signals, and can also completely retain the characteristics of the magnetron, thereby enabling accurate detection of the reflection coefficient at the magnetron input port.

[0076] The coaxial waveguide conversion device 10 provided in this application can be applied to fields involving electromagnetic transmission, such as microwave heating and communication signal transmission.

[0077] Please see Figure 9 , Figure 9 This is a schematic diagram of the structure of a microwave device provided in some embodiments of this application.

[0078] In some embodiments, the microwave device 1 includes the coaxial waveguide conversion device 10 described above, and uses the coaxial waveguide conversion device 10 to convert coaxial mode microwaves into waveguide mode microwaves. The coaxial waveguide conversion device 10 can protect the microwave source and transmission structure at the location of highest microwave energy density, can withstand high-power microwaves, and improves the yield rate.

[0079] Please see Figure 10 , Figure 10 This is a schematic diagram of the structure of a communication device provided in some embodiments of this application.

[0080] In some embodiments, the communication device 2 includes the coaxial waveguide conversion device 10 described above, and uses the coaxial waveguide conversion device 10 to realize electromagnetic signal transmission. The coaxial waveguide conversion device 10 can realize signal transmission conversion in the communication device 2.

[0081] In the description of this application, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0082] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A coaxial waveguide conversion device, characterized in that, include: A waveguide having a waveguide cavity and a mounting hole communicating with the waveguide cavity; A coaxial output device having a coupler and a transmission antenna, the coupler having a coupling cavity, and the transmission antenna being at least partially located within the coupling cavity; The coupler is inserted into the mounting hole and has a radiating part exposed to the waveguide cavity. The transmission antenna located in the coupling cavity is connected to the radiating part. The electromagnetic wave energy transmitted by the transmission antenna can be radiated into the waveguide cavity through the current change on the surface of the radiating part, so as to realize the conversion of electromagnetic waves from coaxial mode to waveguide mode.

2. The coaxial waveguide conversion device according to claim 1, characterized in that, There is a gap between the coupler and the wall of the mounting hole. The coaxial waveguide conversion device also includes a fixing member, which fixes the coupler on the waveguide and covers the gap.

3. The coaxial waveguide conversion device according to claim 2, characterized in that, The coupler can move relative to the fixing member to adjust the length of the coupler extending into the waveguide cavity.

4. The coaxial waveguide conversion device according to claim 2, characterized in that, The fasteners can be integrated or separate.

5. The coaxial waveguide conversion device according to claim 1, characterized in that, The coupler is detachably connected to the wall of the mounting hole.

6. The coaxial waveguide conversion device according to claim 1, characterized in that, The surface of the radiating part is smooth.

7. The coaxial waveguide conversion device according to claim 1, characterized in that, The coupler further includes an insulating portion connected to the radiating portion and at least partially disposed opposite to the wall of the mounting hole.

8. The coaxial waveguide conversion device according to claim 7, characterized in that, The coupler also includes a sealing portion for preventing electromagnetic wave leakage, wherein the radiating portion, the insulating portion and the sealing portion are connected in sequence and surround to form the coupling cavity.

9. The coaxial waveguide conversion device according to claim 1, characterized in that, The waveguide has wide walls, narrow walls, and short-circuit walls that cooperate to form a rectangular waveguide, and the mounting hole is provided on one of the wide walls.

10. The coaxial waveguide conversion device according to claim 9, characterized in that, The distance between the central axis of the radiating part and the short-circuit wall is between 20mm and 25mm.

11. The coaxial waveguide conversion device according to any one of claims 1-10, characterized in that, The coaxial output device is a magnetron die or a device adapted to the magnetron die, in order to accurately detect the reflection coefficient of the coaxial input port of the magnetron.

12. A microwave device, characterized in that, Includes the coaxial waveguide conversion device as described in any one of claims 1-11, and uses the coaxial waveguide conversion device to convert coaxial mode microwaves into waveguide mode microwaves.

13. A communication device, characterized in that, It includes the coaxial waveguide conversion device as described in any one of claims 1-11, and uses the coaxial waveguide conversion device to realize electromagnetic signal transmission.

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