Broadband high-power waveguide rotary joint

Abstract

The invention provides a broadband high-power waveguide rotary joint, and aims to solve the technical problems of large size and complex structure of an existing waveguide rotary joint. The waveguide rotary joint comprises a fixed seat, a first rotating shaft and a second rotating shaft, one end of the rotating seat is rotationally connected with one end of the fixed seat, and a second channel communicated with the first channel is formed in the rotating seat; the center body penetrates into the first channel from the side portion of the fixing base, a part of the center body is located in the second channel, and gaps exist between the center body and the inner wall of the first channel and between the center body and the inner wall of the second channel. By arranging the fixed seat and the rotating seat and arranging the center body between the fixed seat and the rotating seat, the purposes of structure simplification and size minimization are achieved. By arranging the first blocking block and the second blocking block, reactance values can be offset in a wide frequency band, and impedance matching during mode conversion is achieved.

Description

Technical Field

[0001] This invention relates to a microwave waveguide device, and more specifically to a broadband high-power waveguide rotary joint. Background Technology

[0002] Waveguide rotary joints are used in the field of radio frequency communication, connecting the fixed part and the rotating seat in the feeder system to realize the rotational scanning of the antenna azimuth and elevation directions. This allows for the search, tracking and measurement of the spatial position of the target while ensuring the normal transmission of electromagnetic energy in the feeder system.

[0003] Waveguide rotary joints are classified into L-shaped, U-shaped, and I-shaped types according to their structure, and into low-power, medium-power, and high-power types according to their power. While existing waveguide rotary joints each have their own characteristics, they still suffer from problems such as narrow bandwidth, large size, and complex structure. Summary of the Invention

[0004] To address the technical problems of large size and complex structure of existing waveguide rotary joints, this invention provides a broadband high-power waveguide rotary joint. By setting a fixed base and a rotating base, and setting a central body between the fixed base and the rotating base, the structure is simplified and the size is reduced.

[0005] The technical solution of this invention is: A broadband high-power waveguide rotary joint, comprising: The mounting base has a first channel inside; A rotating seat, one end of which is rotatably connected to one end of the fixed seat, and the rotating seat has a second channel communicating with the first channel; The central body extends into the first channel from the side of the fixed base and has a portion located in the second channel. There is a gap between the central body and the inner walls of the first channel and the second channel.

[0006] Optionally, the end where the first channel and the second channel are connected to each other is a circular structure with equal inner diameter, and the end where the first channel and the second channel are far apart from each other is a rectangular structure.

[0007] Optionally, both the first channel and the second channel have an L-shaped structure.

[0008] Optionally, the fixing seat is provided with an annular first choke groove, which is arranged around the first channel and located at one end connecting the second channel. The first choke groove is provided with a positioning ring.

[0009] Optionally, one end of the central body is provided with a first conical step, which is located at the corner of the first channel and at the junction of the circular structure and the rectangular structure.

[0010] Optionally, a first blocking block is provided between one side of the first conical step and the fixed seat.

[0011] Optionally, the rotating seat is rotatably connected to the end of the central body, and a second choke groove is provided at the connection point between the rotating seat and the central body, with a support ring inside the second choke groove.

[0012] Optionally, the rotating seat includes: The base has a second channel inside, and a mounting part is provided at the corner of the second channel; A support block is disposed within the mounting portion. The support block has a through hole through which the central body passes, and a connecting portion is provided on one side of the support block. A connecting block is disposed within the connecting portion, and one end of the connecting block is rotatably connected to the end of the central body.

[0013] Optionally, there is a gap between the outer side of the end of the connecting block that connects to the central body and the inner wall of the support block, and this gap constitutes the second choke groove.

[0014] Optionally, the support block has a second conical step on one side within the second channel, and a second blocking block is provided between the second conical step and the base.

[0015] Compared with the prior art, the beneficial effects of the present invention are: By setting a fixed seat and a rotating seat, and placing a central body between the fixed seat and the rotating seat, the structure is simplified and the size is reduced.

[0016] By setting a first block and a second block, the reactance values ​​can be canceled out over a wide bandwidth, achieving impedance matching during mode switching.

[0017] By setting a first choke groove and a second choke groove, as well as a matching positioning ring and a support ring, contactless signal transmission between the fixed part and the rotating part is achieved. The first choke groove and the second choke groove also make the rotary joint have a long service life and stable and reliable operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0020] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0024] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Example

[0025] See Figure 1 This embodiment discloses a broadband high-power waveguide rotary joint, including a fixed base 10, a rotary base 20, and a central body 30. The fixed base 10 has a first channel 11 inside, with both ends of the first channel 11 being open. One end of the rotary base 20 is rotatably connected to one end of the fixed base 10, and the rotary base 20 has a second channel 21 inside. When the rotary base 20 is connected to the fixed base 10, the first channel 11 and the second channel 21 are connected.

[0026] The cross-sectional structure of the end where the first channel 11 and the second channel 21 are connected is the same.

[0027] One end of the central body 30 is fixedly mounted on the fixed base 10, and the other end of the central body 30 is rotatably mounted on the rotating base 20. The middle part of the central body 30 is located in the first channel 11 and the second channel 21, and there is a gap between the outer contour surface of the middle part of the central body 30 and the inner wall of the first channel 11 and the second channel 21.

[0028] In this embodiment, by setting a fixed seat 10 and a rotating seat 20, and setting a central body 30 between the fixed seat 10 and the rotating seat 20, the purpose of simplifying the structure and miniaturizing the volume is achieved.

[0029] In one specific embodiment: The ends of the first channel 11 and the second channel 21 that are connected to each other are both cylindrical spatial structures with equal inner diameters. The ends of the first channel 11 and the second channel 21 that are far apart from each other are both rectangular spatial structures 52 with the same dimensions. The cylindrical spatial structures and rectangular spatial structures 52 in the fixed base 10 and the rotating base 20 together constitute the transmission channel of this broadband high-power waveguide rotary joint.

[0030] In another specific embodiment: The fixed base 10 has an overall L-shaped structure, which makes the first channel 11 also L-shaped. One end of the fixed base 10 is provided with a recessed inner part 12, and one end of the rotating base 20 is embedded in the inner part 12. Furthermore, two bearings 40 are provided between the outside of the rotating base 20 and the fixed base 10, and the rotating connection between the rotating base 20 and the fixed base 10 is realized through the two bearings 40.

[0031] In addition, the embedded part 12 has a ring structure and is arranged circumferentially around one end of the first channel 11. At the same time, there is a solid structure separating the embedded part 12 from the first channel 11.

[0032] In one preferred embodiment, the overall structure of the rotating seat 20 is also L-shaped, so that the structure of the second channel 21 is also L-shaped and can form a symmetrical structure with the first channel 11.

[0033] One end of the aforementioned central body 30 is fixed to the fixed base 10, and the fixed position is located at the corner of the first channel 11, that is, at the junction of the circular space structure 51 and the rectangular space structure 52 of the first channel 11.

[0034] The other end of the central body 30 is rotatably mounted on the rotating seat 20, and the rotatable connection is located at the corner of the second channel 21, that is, at the junction of the circular space structure 51 and the rectangular space structure 52 of the second channel 21.

[0035] The portion of the central body 30 located within the first channel 11 and the second channel 21 is cylindrical. Simultaneously, the ends connecting the first channel 11 and the second channel 21 are coaxially aligned, and the middle portion of the central body 30 is also coaxially aligned with the first channel 11 and the second channel 21. This results in a gap of uniform thickness between the sections connecting the first channel 11 and the second channel 21.

[0036] In another specific embodiment: A first choke groove 13 is provided within the fixed base 10. The first choke groove 13 has an annular structure and is arranged around the first channel 11. Specifically, the first choke groove 13 is disposed between the first channel 11 and the aforementioned embedded portion 12, that is, in the solid structure located between the first channel 11 and the embedded portion 12.

[0037] Preferably, the fixed seat 10 has an annular stepped structure on its solid structure at the end of the first channel 11, and the rotating seat 20 also has an annular stepped structure at this location. The diameters of the stepped structure of the fixed seat 10 and the stepped structure of the rotating seat 20 have a certain difference, thus forming a spatial structure, which is the first choke groove 13.

[0038] In addition, an annular positioning ring 14 is provided in the first choke groove 13. The positioning ring 14 is disposed on the rotating seat 20, and the end of the positioning ring 14 contacts the fixed seat 10, so that a small gap is generated between the rotating seat 20 and the fixed seat 10.

[0039] In this embodiment, the contactless signal transmission between the fixed seat 10 and the rotating seat 20 is achieved by setting the first choke groove 13, which makes the rotating joint have a long service life and stable and reliable operation.

[0040] In another specific embodiment: The outer side of the corner of the fixing base 10 is provided with a position for mounting the center body 30, so that the center body 30 can be mounted on the fixing base 10 and one end of the center body 30 is located outside the fixing base 10.

[0041] In addition, a first conical step 31 is provided at one end of the central body 30. The first conical step 31 is located at the corner of the first channel 11 and at the junction of the circular spatial structure 51 and the rectangular spatial structure 52. At the same time, a first right-angled step 32 is also provided on the side of the first conical step 31, and the fixing base 10 has a solid structure that matches the first right-angled step 32.

[0042] By setting the first conical step 31 and the first right-angle step 32 at the connection between the rectangular space structure 52 and the circular space structure 51, impedance matching between mode TE10 and mode TEM conversion is achieved.

[0043] In another specific embodiment: A first blocking block 33 is provided between one side of the first conical step 31 and the fixing base 10, and the fixing base 10 is provided with a space structure for installing the first blocking block 33. The first blocking block 33 is arranged adjacent to the first right-angle step 32. The first blocking blocks 33 can cancel each other's reactance values ​​over a wide frequency band, realizing impedance matching during mode switching.

[0044] In another specific embodiment: The rotating base 20 is rotatably connected to the end of the central body 30. A second choke groove 22 is provided at the connection point between the rotating base 20 and the central body 30. A support ring is provided inside the second choke groove 22. The second choke groove 22 is also annular and is arranged around this end of the central body 30. In this embodiment, contactless signal transmission between the fixed base 10 and the rotating base 20 is achieved through the second choke groove 22. The use of the second choke groove 22 results in a long lifespan for the rotating joint and stable and reliable operation.

[0045] Preferably, the rotating base 20 includes a base 23, a support block 24 and a connecting block 25. The base 23 has an L-shaped structure. One end of the base 23 is provided with the aforementioned stepped structure, and two bearings 40 are provided on the outside of this end of the base 23. The base 23 is rotatably connected to the inner part 12 on the fixed base 10 through the two bearings 40.

[0046] The interior of the base 23 is an L-shaped second channel 21, and a mounting part is provided at the corner of the base 23 (i.e., the corner of the second channel 21). The mounting part connects from the side of the base 23 to the corner of the second channel 21.

[0047] A support block 24 is provided inside the mounting section. The support block 24 has a through hole, and the end of the aforementioned central body 30 passes through the through hole.

[0048] Meanwhile, a connecting part 26 is also provided on one side of the support block 24. The connecting part 26 is a spatial structure.

[0049] The connecting block 25 is disposed inside the connecting part 26, and one end of the connecting block 25 is rotatably connected to the end of the central body 30.

[0050] In this embodiment, there is a gap between the outer side of one end of the connecting block 25 connected to the central body 30 and the inner wall of the connecting portion 26 of the support block 24, and this gap constitutes the second choke groove 22.

[0051] In another specific embodiment: The support block 24 is provided with a second conical step 27 and a second right-angle step 28 on one side of the second channel 21. A second block 29 is provided between the second conical step 27 and the base 23. The second right-angle step 28 is arranged adjacent to the second block 29. Similarly, the rotating seat 20 is provided with a solid structure that matches the second right-angle step 28.

[0052] In this embodiment, the second block 29 and the second right-angle step 28 have the same function as the first block 33 and the second right-angle step 32. Their purpose is to further enhance the mutual cancellation reactance value in the wide bandwidth and realize the impedance matching capability during mode switching.

[0053] In another specific embodiment: The first choke slot 13 and the second choke slot 22, with a slot depth of one-quarter wavelength or half wavelength, form an impedance transformation from short-circuit to open-circuit to short-circuit, providing a low-resistance transmission path for current. This allows electromagnetic wave leakage to be prevented through an electrical equivalent short-circuit effect, even when there are physical gaps in the actual connection (such as manufacturing errors or non-tight contact), significantly reducing energy radiation loss. For example, in an electric waveguide switch, the choke slot can prevent microwave leakage between the shaft and the cavity.

[0054] Experimental verification: Simulation results and physical verification show that the voltage standing wave ratio is less than 1.25 and the insertion loss is less than 0.2dB in the full S-band frequency range of 2.6GHz-4GHz. The internal inert gas is filled with gas and the power handling capacity is in the MW range.

[0055] In this embodiment, the rotating seat 20 and the fixed seat 10 can achieve non-contact 360-degree rotation through the support ring and the positioning ring 14, which ensures the reliability of rotation from a structural point of view and avoids a series of problems caused by friction jamming or poor contact during product use.

[0056] The semiconductor and tapered steps respectively set in the rotating base 20 and the fixed base 10 ensure mode conversion and filtering, realize wide-bandwidth, high-power, low-loss transmission of radio frequency signals, and have the characteristics of compact structure, convenient processing, low cost, fast installation and easy debugging.

[0057] The embodiments described above are merely illustrative of specific implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A broadband high-power waveguide rotary joint, characterized in that, include: The mounting base has a first channel inside; A rotating seat, one end of which is rotatably connected to one end of the fixed seat, and the rotating seat has a second channel communicating with the first channel; The central body extends into the first channel from the side of the fixed base and has a portion located in the second channel. There is a gap between the central body and the inner walls of the first channel and the second channel.

2. The broadband high-power waveguide rotary joint according to claim 1, characterized in that, The end where the first channel and the second channel are connected to each other is a circular structure with equal inner diameter, and the end where the first channel and the second channel are far apart from each other is a rectangular structure.

3. The broadband high-power waveguide rotary joint according to claim 2, characterized in that, Both the first channel and the second channel have an L-shaped structure.

4. The broadband high-power waveguide rotary joint according to claim 3, characterized in that, The fixed base is provided with an annular first choke groove, which is arranged around the first channel and located at one end connecting the second channel. The first choke groove is provided with a positioning ring.

5. The broadband high-power waveguide rotary joint according to claim 4, characterized in that, One end of the central body is provided with a first conical step, which is located at the corner of the first channel and at the junction of the circular structure and the rectangular structure.

6. The broadband high-power waveguide rotary joint according to claim 5, characterized in that, A first blocking block is provided between one side of the first conical step and the fixed seat.

7. The broadband high-power waveguide rotary joint according to claim 3, characterized in that, The rotating seat is rotatably connected to the end of the central body, and a second choke groove is provided at the connection point between the rotating seat and the central body, with a support ring inside the second choke groove.

8. The broadband high-power waveguide rotary joint according to claim 7, characterized in that, The rotating base includes: The base has a second channel inside, and a mounting part is provided at the corner of the second channel; A support block is disposed within the mounting portion. The support block has a through hole through which the central body passes, and a connecting portion is provided on one side of the support block. A connecting block is disposed within the connecting portion, and one end of the connecting block is rotatably connected to the end of the central body.

9. The broadband high-power waveguide rotary joint according to claim 8, characterized in that, There is a gap between the outer side of the end of the connecting block that connects to the central body and the inner wall of the support block, and this gap constitutes the second choke groove.

10. The broadband high-power waveguide rotary joint according to claim 8, characterized in that, The support block has a second conical step on one side within the second channel, and a second blocking block is provided between the second conical step and the base.

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