Waveguide-coaxial conversion device and power synthesis device

Abstract

The utility model relates to the technical field of electromagnetic wave conduction, in particular to a waveguide-coaxial conversion device and a power synthesis device.The waveguide-coaxial conversion device comprises a waveguide tube, the waveguide tube comprises a first H face, a second H face, a first E face and a second E face, one end of the waveguide tube is closed, and the other end of the waveguide tube is open; the conductor is arranged between the first H surface and the second H surface, the two ends of the conductor are connected with the inner wall of the first E surface and the inner wall of the second E surface respectively, and the conductor is arranged close to the closed end of the waveguide tube; the waveguide-coaxial conversion device comprises a waveguide tube, a first H surface and a coaxial part, the coaxial part comprises an outer conductor and an inner conductor, the outer conductor is connected with the first H surface, the inner conductor penetrates through the first H surface in a non-contact mode and then is connected with the conductor, the coaxial part is arranged close to the closed end of the waveguide tube, and the waveguide-coaxial conversion device is simple in structure, light in weight, low in reflection and good in transmission performance. The waveguide-coaxial conversion device is adopted by the power synthesis device.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic wave conduction, in particular to a waveguide-coaxial conversion device and a power synthesis device. Background Art

[0002] A coaxial line is a wide-band microwave transmission line consisting of a guiding system consisting of two coaxial cylindrical conductors, with air or high-frequency dielectric filled between the inner and outer conductors.

[0003] A waveguide is a hollow, smooth-walled metal conduit or metal-coated tube used to transmit ultra-high frequency electromagnetic waves, through which pulse signals can be transmitted to their destination with minimal loss.

[0004] When electromagnetic waves are transmitted between coaxial and waveguide, a waveguide-to-coaxial conversion device is required. The existing waveguide-to-coaxial conversion device has a complex structure, heavy weight, and large reflection, which is not conducive to the miniaturization and popularization of the equipment. Utility Model Content

[0005] The purpose of the present utility model is to provide a waveguide-to-coaxial conversion device to solve at least one technical problem in the prior art.

[0006] Another object of the present invention is to provide a power combining device, which adopts the above-mentioned waveguide-to-coaxial conversion device.

[0007] The purpose of this utility model is achieved through the following technical solutions:

[0008] A waveguide-to-coaxial conversion device, comprising:

[0009] A waveguide tube, the waveguide tube comprising a first H-surface, a second H-surface, a first E-surface, and a second E-surface, wherein one end of the waveguide tube is closed and the other end is open;

[0010] a conductor, the conductor being disposed between the first H-surface and the second H-surface, the two ends of the conductor being connected to the inner wall of the first E-surface and the inner wall of the second E-surface, respectively, and the conductor being disposed near the closed end of the waveguide;

[0011] Coaxial, the coaxial includes an outer conductor and an inner conductor, the outer conductor is connected to the first H-plane, the inner conductor passes through the first H-plane without contact and is connected to the conductor, and the coaxial is arranged near the closed end of the waveguide.

[0012] Furthermore, the distance from the center of the conductor to the closed end of the waveguide is D1, where D1=λ / 4, and λ is the wavelength of the electromagnetic wave.

[0013] Furthermore, the distance from the center of the conductor to the first H-plane is D2, the distance from the first H-plane to the second H-plane is D3, and D2=D3 / 3.

[0014] Furthermore, the distance from the inner conductor to the first E-plane is equal to the distance from the inner conductor to the second E-plane.

[0015] Furthermore, a boss is provided on the conductor on the side of the open end facing the waveguide tube.

[0016] Furthermore, the length of the boss decreases from the middle of the conductor to both ends.

[0017] Furthermore, the number of the bosses is an even number, and the bosses are symmetrically arranged on both sides of the plane. The distance from the plane to the first E-surface is D4, and the distance from the plane to the second E-surface is D5, and D4=D5.

[0018] Furthermore, the distances between the bosses are equal.

[0019] Furthermore, the conductor is provided with a channel for heat dissipation.

[0020] A power synthesis device comprises the waveguide-coaxial conversion device.

[0021] The utility model has the following advantages:

[0022] 1. The conductor of the waveguide-to-coaxial converter of the present invention has a simple structure, is lightweight, has readily available raw materials, is conveniently processed and manufactured, and is conducive to miniaturization of the device;

[0023] 2. The conductor and coaxial portion of the waveguide-to-coaxial converter of the present invention are both arranged close to the closed end of the waveguide tube, thereby reducing reflection and improving electromagnetic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. For those skilled in the art, other relevant drawings can be obtained based on these drawings without inventive effort.

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of the waveguide-to-coaxial conversion device of the present invention;

[0026] Figure 2 This is a front view of the waveguide-to-coaxial conversion device of the present invention;

[0027] Figure 3 for Figure 2 AA section diagram;

[0028] Figure 4 for Figure 2 Schematic diagram of the middle BB section;

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure of the conductor of the utility model;

[0030] Figure 6 This is an S-parameter curve diagram of the waveguide-to-coaxial conversion device of the present invention;

[0031] In the figure: 1-waveguide tube; 11-first H-plane; 12-second H-plane; 13-first E-plane; 14-second E-plane; 2-conductor; 21-boss; 22-channel; 3-coaxial; 31-outer conductor; 32-inner conductor; 4-plane. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 shall fall within the scope of protection of the present invention.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] See Figures 1 to 5 , a waveguide-to-coaxial conversion device, comprising:

[0037] A waveguide tube 1, comprising a first H-surface 11, a second H-surface 12, a first E-surface 13, and a second E-surface 14, wherein one end of the waveguide tube 1 is closed and the other end of the waveguide tube 1 is open;

[0038] The conductor 2 is arranged between the first H-surface 11 and the second H-surface 12, the conductor 2 is spaced apart from the inner wall of the first H-surface 11, and the conductor 2 is spaced apart from the inner wall of the second H-surface 12. One end of the conductor 2 is connected to the inner wall of the first E-surface 13, and the other end of the conductor 2 is connected to the inner wall of the second E-surface 14. In order to reduce reflection and improve transmission performance, the conductor 2 is arranged close to the closed end of the waveguide 1. The conductor 2 of the present invention is a square rod-shaped conductor (such as square steel, square tube, rectangular tube, etc.). In some embodiments, the conductor 2 can also be a round rod-shaped conductor (such as round steel, steel tube, etc.). Compared with conventional technology, the conductor 2 of the waveguide-to-coaxial conversion device of the present invention can be directly made of profiles (such as square steel, square tube, rectangular tube, round steel, steel tube, etc.), which has a simple structure, light weight, easy to obtain raw materials, and convenient processing and manufacturing.

[0039] The coaxial cable 3 includes an outer conductor 31 and an inner conductor 32. The outer conductor 31 is connected to the first H-plane 11. To reduce reflection and improve transmission performance, the inner conductor 32 passes through the first H-plane 11 and is connected to the middle of the conductor 2. There is no contact between the inner conductor 32 and the first H-plane 11. To reduce reflection and improve transmission performance, the coaxial cable 3 is arranged close to the closed end of the waveguide 1.

[0040] Furthermore, the distance from the center of the conductor 2 to the closed end of the waveguide 1 is D1. In order to further reduce reflection and improve transmission performance, D1=λ / 4, where λ is the wavelength of the electromagnetic wave.

[0041] Furthermore, the distance from the center of the conductor 2 to the first H-plane 11 is D2, and the distance from the first H-plane 11 to the second H-plane 12 is D3. In order to further reduce reflection and improve transmission performance, the inventors have learned through a large number of experiments and simulations that D2=D3 / 3 is the best.

[0042] Furthermore, in order to further reduce reflection and improve transmission performance, the distance from the inner conductor 32 to the first E-plane 13 is equal to the distance from the inner conductor 32 to the second E-plane 14, that is, the inner conductor 32 is centered in the width direction of the waveguide tube 1.

[0043] Furthermore, in order to increase the bandwidth, a boss 21 is provided on the conductor 2 , and the boss 21 faces the open end of the waveguide 1 .

[0044] Furthermore, the electric field strength becomes increasingly weaker from the middle of the waveguide 1 to the two E-surfaces (i.e., the first E-surface 13 and the second E-surface 14). That is, the electric field strength in the middle of the waveguide 1 is greater than the electric field strength at the two E-surfaces of the waveguide 1. Therefore, the electric field strength in the middle of the conductor 2 is greater than the electric field strength at the two ends of the conductor 2. In order to significantly increase the bandwidth and better match the electric field strength, the length of the boss 21 decreases from the middle of the conductor 2 to the two ends of the conductor 2. That is, where the electric field is stronger, the length of the boss 21 is longer, and where the electric field is weaker, the length of the boss 21 is shorter. This can also reduce the weight of the conductor 2, thereby reducing the weight of the waveguide-to-coaxial conversion device.

[0045] Furthermore, in order to further increase the bandwidth, the number of the bosses 21 is at least 2, and the number of the bosses 21 is an even number; in order to further reduce reflection and improve transmission performance, the bosses 21 are symmetrically arranged on both sides of the plane 4, the distance from the plane 4 to the first E-plane 13 is D4, and the distance from the plane 4 to the second E-plane 14 is D5, and D4=D5, that is, the plane 4 is perpendicular to and bisects the H-plane (that is, the first H-plane 11 and the second H-plane 12), and the plane 4 is the median perpendicular plane of the H-plane. This paragraph describes that the bosses 21 are symmetrically arranged on both sides of the median perpendicular plane of the H-plane.

[0046] Furthermore, the distances between the bosses 21 are equal.

[0047] Furthermore, the heat generated at the waveguide and coaxial conversion point is often large, and timely heat dissipation and cooling are required, otherwise the electromagnetic performance of the waveguide-coaxial conversion device will be seriously affected. In order to dissipate heat in a timely and rapid manner, the conductor 2 is provided with a channel 22, and the channel 22 is used for heat dissipation; specifically, a cooling medium (such as gas and / or liquid) can be introduced into the channel 22, and the purpose of timely and rapid heat dissipation can be achieved through the flow of the cooling medium. In addition, the channel 22 can also reduce the weight of the conductor 2; for ease of production, the conductor 2 of the present invention can be directly produced using a profile with a hole (such as a square tube, a rectangular tube, a steel pipe, etc.), and the hole of the profile itself can be used as the channel 22, eliminating the process of processing the channel 22. Compared with traditional technologies, the conductor 2 of the waveguide-coaxial conversion device of the present invention has a simple structure, a light weight, easy-to-obtain raw materials, and is more convenient to process and produce.

[0048] A power combining device includes the waveguide-coaxial conversion device. It should be noted that the power combining device of the present invention can also be used as a power distribution device.

[0049] The waveguide-coaxial converter of the utility model has low reflection and good transmission performance. Its S parameter curve is shown in FIG. Figure 6 .

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A waveguide-to-coaxial conversion device, characterized in that: include: A waveguide tube (1), the waveguide tube (1) comprising a first H-surface (11), a second H-surface (12), a first E-surface (13) and a second E-surface (14), one end of the waveguide tube (1) being closed and the other end being open; A conductor (2), the conductor (2) being arranged between the first H-surface (11) and the second H-surface (12), the two ends of the conductor (2) being respectively connected to the inner wall of the first E-surface (13) and the inner wall of the second E-surface (14), and the conductor (2) being arranged close to the closed end of the waveguide tube (1); A coaxial cable (3), comprising an outer conductor (31) and an inner conductor (32), wherein the outer conductor (31) is connected to the first H-plane (11), and the inner conductor (32) is connected to the conductor (2) after passing through the first H-plane (11) without contact, and the coaxial cable (3) is arranged near the closed end of the waveguide tube (1).

2. The waveguide-to-coaxial conversion device according to claim 1, wherein: The distance from the center of the conductor (2) to the closed end of the waveguide tube (1) is D1, where D1=λ / 4, and λ is the wavelength of the electromagnetic wave.

3. The waveguide-to-coaxial conversion device according to claim 2, wherein: The distance from the center of the conductor (2) to the first H-plane (11) is D2, the distance from the first H-plane (11) to the second H-plane (12) is D3, and D2=D3 / 3.

4. The waveguide-to-coaxial conversion device according to claim 3, wherein: The distance between the inner conductor (32) and the first E-plane (13) is equal to the distance between the inner conductor (32) and the second E-plane (14).

5. The waveguide-to-coaxial conversion device according to claim 4, characterized in that: A boss (21) is provided on the conductor (2) on the side of the opening end facing the waveguide tube (1).

6. The waveguide-to-coaxial conversion device according to claim 5, wherein: The length of the boss (21) decreases sequentially from the middle of the conductor (2) to both ends.

7. The waveguide-to-coaxial conversion device according to claim 6, wherein: The number of the bosses (21) is an even number, and the bosses (21) are symmetrically arranged on both sides of the plane (4). The distance from the plane (4) to the first E-surface (13) is D4, and the distance from the plane (4) to the second E-surface (14) is D5, and D4=D5.

8. The waveguide-to-coaxial conversion device according to claim 7, wherein: The distances between the bosses (21) are equal.

9. The waveguide-to-coaxial conversion device according to any one of claims 1 to 8, characterized in that: The conductor (2) is provided with a channel (22) for heat dissipation.

10. A power combining device, characterized in that: The power combining device comprises the waveguide-to-coaxial conversion device according to any one of claims 1 to 9.

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