CN113206359A - Central hub coaxially connected with waveguide feed source and application - Google Patents
Central hub coaxially connected with waveguide feed source and application Download PDFInfo
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- CN113206359A CN113206359A CN202110328974.2A CN202110328974A CN113206359A CN 113206359 A CN113206359 A CN 113206359A CN 202110328974 A CN202110328974 A CN 202110328974A CN 113206359 A CN113206359 A CN 113206359A
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- feed source
- waveguide
- central hub
- feed
- hub
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/04—Fixed joints
- H01P1/045—Coaxial joints
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
- H01Q15/161—Collapsible reflectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
Abstract
The invention belongs to the technical field of space-borne antennas and discloses a central hub coaxially connected with a waveguide feed source and application thereof. The feed source hole is coaxially connected with the feed source loudspeaker through a set screw, the set screw is screwed in a bolt hole, and the bolt hole is positioned on the lower end face of the feed source loudspeaker. The front side of the outer ring cylindrical boss is provided with the anti-collision arc, so that the collision between the upper pressure plate and the central hub base is avoided; the feed source hole is fixedly connected with the feed source horn through a set screw, the coaxial relation is ensured, and the horizontal shaking of the feed source horn is reduced; the feed source horn of the umbrella-shaped antenna is coaxially fixed with the bottom of the central hub, so that the horizontal shaking of the feed source horn is reduced, the collision between the upper pressure plate and the base of the central hub is avoided, the circumferential rotation of the subreflector during expansion is avoided, and the quality distribution of the central hub and the waveguide feed source is facilitated.
Description
Technical Field
The invention belongs to the technical field of space-borne antennas, and particularly relates to a central hub coaxially connected with a waveguide feed source and application of the central hub.
Background
At present, with the rapid development of aerospace technology, a satellite-borne deployable antenna plays an increasingly important role, and an umbrella-shaped deployable antenna has outstanding advantages in aspects of storage ratio, area density, deployment performance, shape retention in an orbital thermal environment and the like, and is highly concerned and widely researched by a plurality of international space research institutions. The central hub which can be coaxially connected with the waveguide feed source is a key device for connecting the feed source horn and the antenna structure, and is a premise that the umbrella-shaped antenna can accurately transmit and receive signals, and the reliability of the central hub determines the success or failure of the antenna expansion.
In 2016, Sauder et al, Jonathan F.Sauder, California institute of technology, jet propulsion laboratory, discloses a central hub coaxially connected to a waveguide feed (Jonathan F.Sauder, Nacer Chahat, Richard Hodges, Eva Peral, and Mark W.Thomson, signing, Building, and Testing a Mesh Ka-band parallel robust Antenna (KaPDA) for CubeSats,54th AIAA Aerospaces Sciences Testing, 4-8 January 2016, San Diego, California, USA). When the device is used for fixing a feed source horn, the device is connected with a feed source horn screw through two feed source holes; feed horn mounting means that prior art provided still can have the level of feed horn to rock after the installation, consequently and produces the error, and the subreflector expandes to have circumferential direction, and top board and central wheel hub base can produce simultaneously and collide with, and central wheel hub weight is great. Therefore, there is a need to solve the above problems and to provide a new central hub coaxially connected to a waveguide feed.
Through the above analysis, the problems and defects of the prior art are as follows: in the installation mode of the feed source horn in the prior art, the feed source horn still horizontally shakes after installation to generate errors, and the subreflector expands to rotate circumferentially; meanwhile, the upper pressing plate and the base of the central hub can collide with each other, and the central hub is heavy.
The significance of solving the problems and the defects is as follows: the feed source is the heart of the antenna, provides effective irradiation for the umbrella antenna, and arranges the electromagnetic waves reflected by the reflecting surface to make the polarization directions of the electromagnetic waves consistent, thereby improving the efficiency of the antenna. Good coaxial connection can make the antenna more efficient. The high coaxial connection is realized, the collision is avoided, the quality of the waveguide feed source is reduced, and the quality distribution of the central hub and the waveguide feed source is facilitated.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a central hub coaxially connected with a waveguide feed source and application thereof, and solves the problems that the existing antenna feed source horn can horizontally shake, an auxiliary reflecting surface is expanded to rotate circumferentially, the feed source waveguide has large mass, the mass distribution of the central hub and the waveguide feed source is uneven, and an upper pressure plate collides with a base of the central hub.
The invention is realized in such a way that a central hub coaxially connected with a waveguide feed source is provided with a hub base; the upper end of the hub base is fixed with a central boss, and the central boss is coaxially connected with the feed source loudspeaker through a feed source hole by a set screw.
Further, the hub base is connected with a deployment mechanism of the deployable antenna.
Furthermore, the feed source hole is coaxially connected with the feed source loudspeaker through a set screw, the set screw is screwed in a bolt hole, and the bolt hole is positioned on the lower end face of the feed source loudspeaker, so that the quality distribution of the central hub and the waveguide feed source is facilitated.
Furthermore, the upper end of the central boss is provided with a guide groove, the guide groove is in sliding connection with the sub-reflecting surface base, the unfolding direction is controlled when the sub-reflecting surface is unfolded, and the sub-reflecting surface is prevented from rotating circumferentially.
Furthermore, the front surface of the central boss is provided with an anti-collision arc, so that the upper pressure plate is prevented from colliding with the central boss.
Furthermore, the feed source horn is provided with a waveguide, and the waveguide is inserted in the waveguide hole.
Furthermore, the waveguide hole is connected with a cylindrical shaft at the center of the feed source horn in a sliding mode, and horizontal shaking of the waveguide is reduced.
Furthermore, an auxiliary reflecting surface base is arranged on the feed source loudspeaker.
Furthermore, a waveguide hole and a connecting hole are formed in the middle of the hub base, and horizontal shaking of the waveguide is reduced.
Furthermore, an upper pressure plate is covered on the upper end cover of the hub base.
By combining all the technical schemes, the invention has the advantages and positive effects that: the central hub base comprises a connecting hole, and the central boss comprises a waveguide hole, a feed source hole and a guide groove; the front surface of the outer ring cylindrical boss is provided with an anti-collision arc, so that the collision between the upper pressure plate and the central hub base is avoided, and the total weight of the antenna is reduced; the feed source hole is fixedly connected with the feed source horn through a set screw, the coaxial relation is ensured, and the horizontal shaking of the feed source horn is reduced; the waveguide hole of the central boss is coaxially and slidably connected with the feed source horn; the guide groove on the central boss plays a role in guiding the expansion of the sub-reflecting surface. The feed source holes are coaxially connected with the feed source horn through bolts, the four feed source holes can increase the connection stability, horizontal shaking of the feed source horn is reduced, and the antenna precision is improved. The front surface of the central boss is provided with an anti-collision arc, so that the total weight of the antenna can be reduced, and the collision between the upper pressure plate and the central hub base is avoided. The waveguide hole is connected with the cylindrical shaft at the center of the feed source horn in a sliding mode, and horizontal shaking of the feed source horn is reduced. The guide groove is arranged on the central boss and is in sliding connection with the subreflector base, the expansion direction is controlled when the subreflector expands, the quality of the waveguide feed source is reduced, and the quality distribution of the central hub and the waveguide feed source is facilitated.
The feed horn of the umbrella-shaped antenna is coaxially fixed with the bottom of the central hub, so that the horizontal shaking of the feed horn is reduced, the collision between the upper pressing plate and the base of the central hub is avoided, the circumferential rotation of the subreflector during expansion is avoided, the quality of the waveguide feed source is reduced, the quality distribution of the central hub and the waveguide feed source is facilitated, and the feed horn is applied to the design of a high-precision umbrella-shaped expandable antenna. Compared with the prior art, the method also has the following advantages:
1) in the installation of the feed source horn, the feed source horn is connected with the central hub by the set screw and is in sliding connection with the feed source horn by the waveguide hole, so that the stability of the feed source horn is improved, and the horizontal shaking is reduced.
2) The guide groove arranged on the central boss plays a role in guiding the expansion of the auxiliary reflecting surface, so that the problem that the precision of the antenna is reduced due to circumferential rotation when the auxiliary reflecting surface is expanded is avoided, and the stability of the antenna in the expansion process is ensured.
3) The front surface of the outer ring cylindrical boss of the central hub is provided with the anti-collision arc, so that the collision between the upper pressure plate and the base of the central hub is avoided, the total weight of the antenna is reduced by reducing materials, and the antenna has better economical efficiency.
4) The invention removes partial structure of the waveguide feed source, adds the central boss structure matched with the waveguide feed source on the central hub base, reduces the quality of the waveguide feed source, and is beneficial to the quality distribution of the central hub and the waveguide feed source.
Drawings
Fig. 1 is a schematic structural diagram of a central hub coaxially connected with a waveguide feed source according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of connection with a feed horn according to an embodiment of the present invention.
Fig. 3 is a top view of a center hub coaxially coupled to a waveguide feed provided by an embodiment of the present invention.
Fig. 4 is a schematic view of the unfolding guide of the sub-reflecting surface according to the embodiment of the present invention.
FIG. 5 is a schematic diagram of the upper platen according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of waveguide mating according to an embodiment of the present invention.
In the figure: 1. a hub base; 2. a central boss; 3. tightening the screw; 4. a feed source horn; 5. bolt holes; 6. a waveguide; 7. a feed aperture; 8. a waveguide aperture; 9. connecting holes; 10. a guide groove; 11. a sub-reflector base; 12. an upper pressure plate; 13. and arc collision prevention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a central hub coaxially connected with a waveguide feed source, a control method and application thereof, and the invention is described in detail below by combining with the attached drawings.
Those skilled in the art of providing a central hub that is coaxially coupled to a waveguide feed according to the present invention may also perform other steps, and the central hub that is coaxially coupled to a waveguide feed according to the present invention of fig. 1 is merely one specific example.
As shown in fig. 1 to 6, in the central hub coaxially connected to a waveguide feed source according to an embodiment of the present invention, a hub base 1 is connected to an expansion mechanism of an expandable antenna, a central boss 2 is fixed to an upper end of the hub base 1, the central boss 2 is coaxially connected to a feed source horn 4 through a feed source hole 7 by a set screw 3, and a guide groove 10 is formed in an upper end of the central boss 2 to guide expansion of an auxiliary reflection surface. The guide groove 10 is slidably connected to the sub-reflecting surface base 11, and controls the direction of the expansion when the sub-reflecting surface expands. The front surface of the central boss 2 is provided with an anti-collision arc 13, so that the total weight of the hub can be reduced, and the collision between the upper pressure plate 12 and the central hub base 1 can be avoided. Feed source hole 7 passes through holding screw 3 and feed source loudspeaker 4 coaxial coupling, and four feed source holes 7 both can increase the stability of connecting, can reduce feed source loudspeaker 4's level again and rock, improve the antenna accuracy. The fastening screw 3 is screwed in the bolt hole 5, and the bolt hole 5 is positioned on the lower end face of the feed source loudspeaker 4. Wherein, the middle position of the central hub base 1 is provided with a waveguide hole 8 and a connecting hole 9. The feed horn 4 is provided with a waveguide 6, and the waveguide 6 is inserted in a waveguide hole 8. The waveguide hole 8 is connected with the cylindrical shaft at the center of the feed source loudspeaker 4 in a sliding mode, and horizontal shaking of the feed source loudspeaker 4 is reduced. An auxiliary reflecting surface base 11 is arranged on the feed source loudspeaker 4, and an upper pressing plate 12 is covered at the upper end of the hub base 1.
In the invention, the openings at four corners of the hub base are used for fixing with the antenna unfolding mechanism, the central boss is coaxially connected with the feed horn through the feed hole by a set screw, the waveguide hole of the central boss is connected with the waveguide, and the guide groove arranged on the central boss is in sliding connection with the sub-reflecting surface base. In the installation of feed source loudspeaker, adopt holding screw to be connected with central wheel hub to with waveguide hole and feed source loudspeaker sliding connection, increased feed source loudspeaker's stability, reduced the level and rocked. The guide groove arranged on the central boss plays a role in guiding the expansion of the auxiliary reflecting surface, so that the problem that the precision of the antenna is reduced due to circumferential rotation when the auxiliary reflecting surface is expanded is avoided, and the stability of the antenna in the expansion process is ensured. The front surface of the outer ring cylindrical boss of the central hub is provided with the anti-collision arc, so that the collision between the upper pressure plate and the central hub base is avoided, the total weight of the antenna is reduced by reducing materials, and the antenna has better economical efficiency. Therefore, the feed source horn of the umbrella-shaped antenna is coaxially fixed with the bottom of the central hub, the horizontal shaking of the feed source horn is reduced, the total weight of the antenna is reduced, the collision between the upper pressure plate and the base of the central hub is avoided, the circumferential rotation of the auxiliary reflecting surface during the expansion is avoided, and the like. The method can be applied to the design of high-precision umbrella-shaped deployable antennas.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A central hub coaxially connected with a waveguide feed source is characterized in that the central hub coaxially connected with the waveguide feed source is provided with:
a hub base;
the upper end of the hub base is fixed with a central boss, and the central boss is coaxially connected with the feed source loudspeaker through a feed source hole by a set screw.
2. The central hub of claim 1 coaxially coupled to a waveguide feed, wherein the hub base is coupled to a deployment mechanism of a deployable antenna.
3. The central hub of claim 1, wherein the feed hole is coaxially connected to the feed horn via a set screw, the set screw is screwed into a bolt hole, and the bolt hole is located on a lower end surface of the feed horn.
4. The central hub of claim 1, wherein the central boss has a guide slot at an upper end thereof, the guide slot being slidably connected to the sub-reflector base to control the deployment direction when the sub-reflector is deployed.
5. The central hub of claim 1 coaxially coupled to the waveguide feed, wherein the central boss is frontally disposed for arc collision protection.
6. The center hub of claim 1 coaxially coupled to a waveguide feed, wherein the feed horn is provided with a waveguide that is plugged into a waveguide hole.
7. The center hub of claim 6 coaxially coupled to the waveguide feed, wherein the waveguide aperture is slidably coupled to a cylindrical shaft at the center of the feed horn.
8. The central hub of claim 1 coaxially coupled to a waveguide feed, wherein a subreflector mount is disposed on the feed horn.
9. The central hub according to claim 1, wherein the hub base is provided with a waveguide hole and a connecting hole at a middle position;
the upper end cover of the hub base is provided with an upper pressure plate.
10. A satellite-borne deployable antenna, characterized in that the satellite-borne deployable antenna uses the central hub coaxially connected with a waveguide feed source as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110328974.2A CN113206359B (en) | 2021-03-27 | 2021-03-27 | Central hub coaxially connected with waveguide feed source and application |
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| CN202110328974.2A CN113206359B (en) | 2021-03-27 | 2021-03-27 | Central hub coaxially connected with waveguide feed source and application |
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| CN113206359A true CN113206359A (en) | 2021-08-03 |
| CN113206359B CN113206359B (en) | 2022-04-05 |
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2021
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