CN109687057B - Rectangular waveguide H-surface rotary joint - Google Patents
Rectangular waveguide H-surface rotary joint Download PDFInfo
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- CN109687057B CN109687057B CN201910069356.3A CN201910069356A CN109687057B CN 109687057 B CN109687057 B CN 109687057B CN 201910069356 A CN201910069356 A CN 201910069356A CN 109687057 B CN109687057 B CN 109687057B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/06—Movable joints, e.g. rotating joints
- H01P1/062—Movable joints, e.g. rotating joints the relative movement being a rotation
- H01P1/063—Movable joints, e.g. rotating joints the relative movement being a rotation with a limited angle of rotation
Abstract
The invention discloses a rectangular waveguide H-surface rotary joint, and aims to provide a waveguide rotary joint which is simple in structure, high in transmission efficiency, easy to realize array design and capable of rotating 90 degrees along the H surface of a rectangular waveguide fundamental mode. The invention is composed of a fixed input structure and a rotary output structure; the rotary output structure consists of a first rectangular straight waveguide and 2 circular arc waveguide walls, the fixed input structure consists of a second rectangular straight waveguide and a circular ring rectangular waveguide, and the circular ring rectangular waveguide has no outer narrow side waveguide wall in the range of 180-270 degrees in the anticlockwise direction; the outer walls of the 2 circular arc waveguide walls are tightly attached to the inner wall of the narrow side at the outer side of the circular rectangular waveguide, and the first rectangular straight waveguide port extends outwards from the part of the circular rectangular waveguide without the narrow side at the outer side; the invention changes the microwave transmission direction by extracting the standing waves at different positions through rotating the output port, has simple structure and high power capacity and transmission efficiency, and can be connected with the multi-channel rectangular waveguide array antenna through array design.
Description
Technical Field
The invention relates to a waveguide rotary joint for communicating an antenna and a microwave source in the technical field of microwaves, in particular to a rectangular waveguide H-surface rotary joint.
Background
The microwave beam scanning and transmitting system usually utilizes a waveguide rotary joint to enable an antenna subsystem to follow up according to different target positions, so as to realize beam pointing scanning. The waveguide rotary joint is generally divided into a fixed unit and a rotary unit, the rotary unit is connected with the antenna and moves along with the antenna, and the fixed unit is connected with the microwave source. The well designed waveguide rotary joint requires stable rotation at the joint and ensures good electrical connection between the fixed unit and the rotary unit.
In recent years, researchers have designed waveguide rotary joints of various structures. The typical rotary joints developed based on the curved circular waveguide structure are combined rotary joints (autumn, Johnchang, Huanghujun, etc., combined rotary joints with power capacity greater than 1GW, intense laser and particle beams, 2010, Vol.22, No.6, pp.1415-1418). The rotary joint can realize 360-degree rotation in azimuth and pitching, and has high power capacity. The typical rotary joints developed based on coaxial waveguides are high-power coaxial rotary joints (xiehing, Liaoyong, Yang Zhong, etc.. ultra-wideband high-power coaxial rotary joints, intense laser and particle beams, 2011, Vol.23, No.11, pp.3095-3098). The coaxial rotary joint has high power capacity and transmission efficiency. The two waveguide rotary joints meet the application scene requirement of single-channel transmission, but are not suitable for array design and cannot meet the application requirement of simultaneous rotation of a plurality of rectangular waveguide array antennas.
Although various waveguide rotary joints in the microwave technical field are researched, the existing scheme still has the defects of difficult array design and the like, and therefore research and exploration on novel waveguide rotary joints are still needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a waveguide rotary joint which has a simple structure, high transmission efficiency and easy array design and can rotate 90 degrees along the H surface of a rectangular waveguide fundamental mode aiming at the connection requirement from a microwave source to a rectangular waveguide array slot antenna.
The technical scheme of the invention is as follows:
oo' is defined as the central axis of the H-plane rotary joint of the rectangular waveguide.
The rectangular waveguide H-plane rotary joint consists of a fixed input structure and a rotary output structure. The rotary output structure consists of a first rectangular straight waveguide, a first arc waveguide wall and a second arc waveguide wall, wherein the central axis o of the first rectangular straight waveguide1o1'perpendicular to the central axis oo' of the invention, the intersection point is o1One narrow side of the first rectangular straight waveguide is connected with the first arc waveguide wall, and the other narrow side of the first rectangular straight waveguide is connected with the second arc waveguide wall; the first circular arc waveguide wall and the second circular arc waveguide wall are arranged along the central axis oo' and the central axis o of the first rectangular straight waveguide1o1' the plane structure of the composition is symmetrical; the size of a port of the first rectangular straight waveguide is consistent with that of a single-channel injection port of the rectangular array antenna to be connected, the width of a long side is a, and the width of a short side is b; the radius of the outer wall of the first arc waveguide wall and the radius of the outer wall of the second arc waveguide wall are r, the wall thickness is d, the bending angle is theta, and the value is 180 degrees (1-a/pi r)>θ>90°(1-2a/πr)，d≤2mm。
The fixed input structure consists of a second rectangular straight waveguide and a circular ring rectangular waveguide, and the central axis o of the second rectangular straight waveguide2o1The circular ring rectangular waveguide is mutually vertical to the central axis oo 'of the invention and is circumferentially symmetrical along the structure of the central axis oo' of the invention; the size of the port of the second rectangular straight waveguide is consistent with that of the port of the first rectangular straight waveguide, the width of the long side is a, and the width of the short side is b; the bending radius of the inner surface of the narrow side at the inner side of the circular ring rectangular waveguide is R1The bending radius of the inner surface of the outer narrow side is R2The value satisfies R2＝r，R2-R1A; with o2o1The second rectangular straight waveguide is connected with the annular rectangular waveguide in a conduction mode in a region from-alpha to alpha, wherein the waveguide wall is not provided with an outer narrow side, the value of the second rectangular straight waveguide is alpha (arcsin) (a/2r), and the second rectangular straight waveguide is connected with the annular rectangular waveguide in the region; with o2o1The circular rectangular waveguide is an initial shaft, an outer narrow-side waveguide wall is not arranged in a region of 180-270 degrees in the anticlockwise direction, the first circular arc waveguide wall and the second circular arc waveguide wall are embedded in the circular rectangular waveguide, the outer walls of the first circular arc waveguide wall and the second circular arc waveguide wall are tightly attached to the inner wall of the outer narrow side of the circular rectangular waveguide, and a port of the first rectangular straight waveguide extends outwards from the region. The invention has an input port and an output port in common, wherein the port of the first rectangular straight waveguide is the output port, and the port of the second rectangular straight waveguide is the input port.
The working principle of the invention is as follows:
according to the microwave theory, a rectangular waveguide TE with the working frequency f is injected from an input port10And standing waves are formed after the microwaves enter the circular rectangular waveguide and are uniformly distributed in the circular rectangular waveguide. According to the determined standing wave distribution, when the output port is rotated to any antinode position of the standing wave, the rectangular waveguide TE is excited in the output port10And the mode realizes the adjustment of a plurality of angles of the microwave transmission direction from the input port to the output port. When the inner surface of the narrow side of the inner side and the outer side of the annular rectangular waveguide has the bending radius R1And R2When the output port is enlarged, the microwave transmission distance is increased, the antinodes of the standing wave in the circular rectangular waveguide are correspondingly increased, and the output portThe position where the rotation is possible, that is, the position where the transmission direction of the microwave can be changed, increases.
When the waveguide array antenna is used, the N waveguide array antennas and the N channels of the rectangular waveguide array antenna are in one-to-one corresponding conduction connection, N is a positive integer, and the change of the emergent direction of the waveguide array antenna is realized through the synchronous rotation of the N rotating output structures.
The invention can achieve the following technical effects:
(1) the invention changes the microwave transmission direction by extracting the standing waves at different positions by rotating the output port, and has simple structure and high power capacity and transmission efficiency.
(2) The invention can increase the rotatable angle of the rotary joint by increasing the radius of the circular rectangular waveguide, thereby meeting the corresponding application requirements.
(3) The array antenna can be connected with the multi-channel rectangular waveguide array antenna through an array design, and the application requirement that a plurality of rectangular waveguide array antennas rotate accurately at the same time is met.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a fixed input structure according to the present invention;
FIG. 3 is a schematic diagram of a rotary output structure according to the present invention.
Detailed Description
Fig. 1 is a schematic three-dimensional structure diagram of a rectangular waveguide H-plane rotary joint structure of the invention, and oo' is a central axis of the invention. The invention is composed of a fixed input structure 1 and a rotary output structure 2. The rotary output structure 2 can be divided into a first rectangular straight waveguide 5 and a first circular arc waveguide wall 6 and a second circular arc waveguide wall 7 with the bending angles of theta, and the central axis o of the first rectangular straight waveguide 51o1'perpendicular to the central axis oo' of the invention, the intersection point is o1A narrow side of one side of the first rectangular straight waveguide 5 is connected with the first circular arc waveguide wall 6, a narrow side of the other side is connected with the second circular arc waveguide wall 7, and the first circular arc waveguide wall 6 and the second circular arc waveguide wall 7 are arranged along the central axis oo' of the invention and the central axis o of the first rectangular straight waveguide 51o1' the formed planar structure is symmetrical. Fixing deviceThe fixed input structure 1 can be divided into a second rectangular straight waveguide 3 and a circular annular rectangular waveguide 4, and the central axis o of the second rectangular straight waveguide 32o1The circular rectangular waveguide 4 is mutually vertical to the central axis oo 'of the invention and is circumferentially symmetrical along the structure of the central axis oo' of the invention; with o2o1The circular rectangular waveguide 4 has no outer narrow waveguide wall in a region from-alpha to alpha, the value of the circular rectangular waveguide 4 is alpha (arcsin (a/2r), and the second rectangular straight waveguide 3 is in conduction connection with the circular rectangular waveguide 4 in the region. With o2o1' as the starting axis, the circular rectangular waveguide 4 has no outer narrow waveguide wall in the region of 180 ° to 270 ° in the counterclockwise direction, the first circular waveguide wall 6 and the second circular waveguide wall 7 are embedded in the circular rectangular waveguide 4, the outer walls of the first circular waveguide wall 6 and the second circular waveguide wall 7 are closely attached to the inner wall of the outer narrow waveguide wall of the circular rectangular waveguide 4, and the port of the first rectangular straight waveguide 5 extends out from the region. The invention has an input port and an output port in common, wherein the port of the first rectangular straight waveguide 5 is the output port, and the port of the second rectangular straight waveguide 3 is the input port.
Fig. 2 is a schematic structural diagram of the fixed input structure 1 according to the present invention. Central axis o of the second rectangular straight waveguide 32o1The circular rectangular waveguide 4 is mutually vertical to the central axis oo ', and is circumferentially symmetrical along the structure of the central axis oo'; the size of the port of the second rectangular straight waveguide 3 is consistent with that of the port of the first rectangular straight waveguide 5, the width of the long side is a, and the width of the short side is b; the inner surface of the narrow side of the inner side of the circular ring rectangular waveguide 4 has the bending radius R1The bending radius of the inner surface of the outer narrow side is R2The value satisfies R2-R1A; with o2o1The circular rectangular waveguide 4 has no outer narrow waveguide wall in a region from-alpha to alpha, the value of the circular rectangular waveguide is equal to arcsin (a/2r), and the second rectangular straight waveguide 3 is connected with the circular rectangular waveguide 4 in a conducting manner in the region; with o2o1' as starting axis, the circular ring rectangular waveguide 4 also has no outer narrow-sided waveguide wall in the region of 180 ° to 270 ° counterclockwise.
FIG. 3 is a drawing showingThe invention discloses a structural schematic diagram of a rotary output structure 2. Central axis o of the first rectangular straight waveguide 51o1Perpendicular to the central axis oo' and having an intersection point of o1', one side narrow edge of the first rectangular straight waveguide 5 is connected with the first circular arc waveguide wall 6, the other side narrow edge is connected with the second circular arc waveguide wall 7, the first circular arc waveguide wall 6 and the second circular arc waveguide wall 7 are along the central axis oo' and the central axis o of the first rectangular straight waveguide 51o1' the plane structure of the composition is symmetrical. The size of a port of the first rectangular straight waveguide 5 is consistent with that of a single-channel injection port of the rectangular array antenna to be connected, the width of a long side is a, and the width of a short side is b; the radius of the outer wall of the first circular arc waveguide wall 6 and the radius of the outer wall of the second circular arc waveguide wall 7 are R, the wall thickness is d, the bending angle is theta, and the value of the radius is R2＝r，180°(1-a/πr)>θ>The outer walls of the first arc waveguide wall 6 and the second arc waveguide wall 7 can be attached to the inner wall of the narrow edge at the outer side of the circular rectangular waveguide 4 only when the angle d is less than or equal to 2mm and is 90 degrees (1-2 a/pi r), the 90-degree outer waveguide wall lacking in the circular rectangular waveguide 4 is completed, and meanwhile, loss and field enhancement are not caused.
The above embodiments are merely illustrative, and not restrictive, and various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention, and all equivalent technical solutions are intended to be included within the scope of the invention.
Claims (3)
1. A rectangular waveguide H-surface rotary joint is characterized in that the rectangular waveguide H-surface rotary joint is composed of a fixed input structure (1) and a rotary output structure (2); the rotary output structure (2) is composed of a first rectangular straight waveguide (5), a first arc waveguide wall (6) and a second arc waveguide wall (7), and the central axis o of the first rectangular straight waveguide (5)1o1The central axis oo 'of the rotary joint is vertical to the central axis oo' of the rectangular waveguide H-plane, and the intersection point is o1One narrow side of the first rectangular straight waveguide (5) is connected with the first arc waveguide wall (6), and the other narrow side is connected with the second arc waveguide wall (7); the first circular arc waveguide wall (6) and the second circular arc waveguide wall (7) are arranged along the central axis oo' and the central axis o of the first rectangular straight waveguide (5)1o1' the plane structure of the composition is symmetrical; the fixed input structure (1) consists of a second rectangular straight waveguide (3) and a circular rectangular waveguide (4), and the central axis o of the second rectangular straight waveguide (3)2o1The circular ring rectangular waveguide (4) is mutually vertical to the central axis oo ', and is circumferentially symmetrical along the structure of the central axis oo'; with o2o1The central axis is' the circular rectangular waveguide (4) has no outer narrow-side waveguide wall in the area from-alpha to alpha, and the second rectangular straight waveguide (3) is in conductive connection with the circular rectangular waveguide (4) in the area; with o2o1The circular ring rectangular waveguide (4) has no outer narrow-side waveguide wall in the range of 180-270 degrees in the anticlockwise direction as a starting shaft; the first arc waveguide wall (6) and the second arc waveguide wall (7) are embedded in the circular rectangular waveguide (4), the outer walls of the first arc waveguide wall (6) and the second arc waveguide wall (7) are tightly attached to the inner wall of the narrow side of the outer side of the circular rectangular waveguide (4), and the port of the first rectangular straight waveguide (5) extends outwards from the range; the port of the first rectangular straight waveguide (5) is an output port, and the port of the second rectangular straight waveguide (3) is an input port.
2. The H-plane revolute joint as claimed in claim 1, wherein the first circular arc waveguide wall (6) and the second circular arc waveguide wall (7) have outer wall radii R and bending angles θ, and the inner surface of the narrow side of the inner side of the circular rectangular waveguide (4) has a bending radius R1The bending radius of the inner surface of the outer narrow side is R2The waveguide wall with the narrow side on the outer side is not arranged in the range of 2 alpha of the joint of the first rectangular straight waveguide (3) and the second rectangular straight waveguide (3), the port sizes of the first rectangular straight waveguide (5) and the second rectangular straight waveguide (3) are consistent with the size of a single-channel injection port of the rectangular array antenna to be connected, the width of the long side is a, the width of the short side is b, and R is satisfied2＝r，R2-R1＝a，180°(1-a/πr)>θ>90°(1-2a/πr)，α＝arcsin(a/2r)。
3. A rectangular waveguide H-plane rotary joint according to claim 1, characterized in that the thickness d of the first circular arc waveguide wall (6) and the second circular arc waveguide wall (7) is less than or equal to 2 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910069356.3A CN109687057B (en) | 2019-01-24 | 2019-01-24 | Rectangular waveguide H-surface rotary joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910069356.3A CN109687057B (en) | 2019-01-24 | 2019-01-24 | Rectangular waveguide H-surface rotary joint |
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| CN109687057A CN109687057A (en) | 2019-04-26 |
| CN109687057B true CN109687057B (en) | 2021-07-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110994080B (en) * | 2019-12-19 | 2021-09-28 | 中国电子科技集团公司第三十八研究所 | Gap waveguide rotary joint combination |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2945193A (en) * | 1954-02-02 | 1960-07-12 | Texas Instruments Inc | Rotary waveguide joint and switching structure |
| CN1682407A (en) * | 2002-09-20 | 2005-10-12 | 株式会社村田制作所 | Antenna device and transmitting/receiving device |
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2019
- 2019-01-24 CN CN201910069356.3A patent/CN109687057B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2945193A (en) * | 1954-02-02 | 1960-07-12 | Texas Instruments Inc | Rotary waveguide joint and switching structure |
| CN1682407A (en) * | 2002-09-20 | 2005-10-12 | 株式会社村田制作所 | Antenna device and transmitting/receiving device |
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