Multi-band High-gain Reflector Antenna with Deployable Sub-reflector

Abstract

The present invention provides a multi-band high-gain reflector antenna with a deployable sub-reflector, comprising: a main reflector, a sub-reflector, a deployable device, a plurality of pressing bases, a deployment base and a multi-band integrated feed source; the sub-reflector and the deployable device are fixedly supported and constrained on the concave surface of the main reflector through the plurality of pressing bases and the deployment base; the multi-band integrated feed source is arranged on the main reflector; the sub-reflector completes the deployment and locking actions through the deployable device, and the antenna is in the working state after the sub-reflector is deployed. Compared with the traditional Cassegrain dual-reflector antenna, the present invention adopts a design of a deployable sub-reflector, further reducing the longitudinal height of the antenna, saving the longitudinal envelope of the detector, and reducing the layout difficulty of the detector device directly in front of the concave surface of the antenna; adopting a V-shaped deployable device, avoiding the interference between the sub-reflector and the deployable device and the multi-band integrated feed source at the center of the antenna during the deployment process.

Description

Technical Field

[0001] The present invention relates to the technical field of reflector antennas, and more particularly, to a multi-band high-gain reflector antenna with a deployable sub-reflector. Background Art

[0002] With the continuous deepening of deep space exploration, the design requirements for high-gain reflector antennas on detectors are getting higher and higher.

[0003] In a traditional Cassegrain dual-reflector antenna, the sub-reflector is fixedly constrained directly in front of the concave surface of the main reflector. When such an antenna is arranged between detector systems, it will further increase the longitudinal height of the detector system, which is not conducive to the layout design of the detector system; for an umbrella-shaped mesh deployable antenna, under the premise of meeting the electrical performance indicators, the aperture and weight of the antenna far exceed the allowable values of the detector; for other types of deployable antennas, such as deployable membrane antennas, etc., sufficient on-orbit reliability verification has not been carried out. Summary of the Invention

[0004] Aiming at the defects in the prior art, the purpose of the present invention is to provide a multi-band high-gain reflector antenna with a deployable sub-reflector.

[0005] The multi-band high-gain reflector antenna with a deployable sub-reflector according to the present invention includes: a main reflector, a sub-reflector, a deployable device, a plurality of pressing bases, a deployment base, and a multi-band integrated feed source;

[0006] The sub-reflector and the deployable device are fixedly constrained on the concave surface of the main reflector through the plurality of pressing bases and the deployment base;

[0007] The sub-reflector completes the deployment and locking actions through the deployable device, and the antenna is in the working state after the sub-reflector is deployed.

[0008] Preferably, the deployable device adopts a V-shaped deployment structure, including V-shaped deployment arms, a deployment device, and a plurality of pressing and releasing devices;

[0009] On the one hand, the sub-reflector is connected to the deployment device through the V-shaped deployment arms, and the deployment device is connected to the deployment base;

[0010] On the other hand, the sub-reflector is connected to the pressing base through the pressing and releasing device.

[0011] Preferably, one ends of the two deployment arms of the V-shaped deployment arm are respectively located on both sides of the sub-reflector;

[0012] At least two of the pressing and releasing mechanisms are respectively located on both sides of the sub-reflector.

[0013] Preferably, the pressing base is arranged in a concave area of the main reflector;

[0014] The unfolding base is arranged in another concave area of the main reflector.

[0015] Preferably, after the pressing and releasing device in the deployable device detonates, under the driving force of the deployment device, the deployment arm drives the sub-reflector to rotate by a preset angle around the rotation axis of the deployment device, and then the deployment device is self-locked. After the sub-reflector reaches the preset deployment position, the multi-band high-gain reflector antenna is in the working state.

[0016] Preferably, the multi-band integrated feed is fixedly constrained on the central axis of the concave surface of the main reflector through a feed support, and passes through the middle clearance of the V-shaped deployment arm.

[0017] Preferably, after the sub-reflector is deployed to the preset position through the deployable device, it is used to reflect the electromagnetic waves radiated by the multi-band integrated feed to the main reflector;

[0018] The main reflector is used to uniformly radiate the electromagnetic waves into space.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) Compared with the traditional Cassegrain dual-reflector antenna, the present invention adopts a deployable sub-reflector design, further reducing the longitudinal height of the antenna, saving the longitudinal envelope of the detector, and reducing the layout difficulty of the detector equipment directly in front of the concave surface of the antenna;

[0021] 2) By adopting a V-shaped deployable device, the interference between the sub-reflector and the deployable device and the multi-band integrated feed at the center of the antenna during the deployment process is avoided;

[0022] 3) The V-shaped deployment arm can be regarded as a coaxial double-arm deployment structure, which has certain advantages in terms of maneuverability and stability compared with the single-axis single-arm or multi-axis multi-arm structure;

[0023] 4) In the retracted or deployed state, the sub-reflector and the V-shaped deployment arm both form a stable triangular structure, further ensuring the deployment accuracy and working stability of the sub-reflector;

[0024] 5) When the sub-reflector is retracted, the longitudinal height of the antenna is 0.67 m; when deployed, the longitudinal height is 1.28 m, and the retraction ratio in the height direction is 0.52. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objects, and advantages of the present invention will become more apparent:

[0026] Figure 1 This is the overall structure diagram of the multi-band high-gain reflector antenna in the retracted state of the sub-reflector in the embodiment of the present invention;

[0027] Figure 2 This is the overall structure diagram of the multi-band high-gain reflector antenna in the deployed state of the sub-reflector in the embodiment of the present invention; and

[0028] Figure 3 This is the overall structure diagram of the deployable device in the retracted state of the sub-reflector in the embodiment of the present invention.

[0029] In the figure:

[0030] 1 is the main reflector; 2 is the sub-reflector; 3 is the deployable device; 4 is the pressing seat; 5 is the deployment base; 6 is the multi-band integrated feed; 7 is the feed support; 8 is the V-shaped deployment arm; 9 is the deployment device; 10 is the pressing release device. Specific embodiments

[0031] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made. These all belong to the protection scope of the present invention.

[0032] The present invention proposes a multi-band high-gain reflector antenna with a deployable sub-reflector, adopting the Cassegrain dual-reflector antenna form, including a main reflector 1, a sub-reflector 2, a deployable device 3, a plurality of pressing bases 4, a deployment base 5, a multi-band integrated feed 6, and a feed support 7;

[0033] Among them, the deployable device 3 adopts a V-shaped structure, including a V-shaped deployment arm 8, a deployment device 9, and a plurality of pressing release devices 10.

[0034] On the one hand, the sub-reflector (2) is connected to the deployment device (9) through the V-shaped deployment arm (8), and the deployment device (9) is connected to the deployment base (5);

[0035] On the other hand, the sub-reflector (2) is connected to the pressing base (4) through the pressing release device (10).

[0036] Combined with Figure 1 and Figure 2 , the sub-reflector 2 completes the deployment and locking actions through the deployable device 3. After the sub-reflector is deployed, the antenna is in a normal working state;

[0037] Specifically, combined with Figure 3, one end of each of the two deployment arms of the V-shaped deployment arm 8 and the two compression release mechanisms 10 are respectively located on both sides of the sub-reflector 2 and are screwed to the sub-reflector 2.

[0038] At the same time, the other end of the V-shaped deployment arm 8 is screwed to the deployment device 9, thus forming the deployable device 3; in the compressed state, the sub-reflector 2 and the deployable device 3 form a stable triangular structure, which is beneficial to the stiffness of the multi-band high-gain reflector antenna when the whole is installed on the main reflector 1.

[0039] Furthermore, combined with Figure 1 , the sub-reflector 2 and the deployable device 3 are fixedly constrained on the front concave surface of the main reflector 1 through a number of compression bases 4 and deployment bases 5. This structural form further compresses the longitudinal height of the high-gain reflector antenna, thereby reducing the layout difficulty of the detector system. At the same time, both the compression bases 4 and the deployment bases 5 are made of wave-transparent materials, reducing the electrical performance loss during the operation of the high-gain reflector antenna.

[0040] Furthermore, combined with Figure 1 , Figure 2 , Figure 3 , after the compression release device 10 in the deployable device 3 detonates, the V-shaped deployment arm 8 drives the sub-reflector 2 to rotate around the rotation axis of the deployment device 9 under the driving force of the deployment device 9. When the rotation angle reaches the preset angle, the deployment device 9 locks itself, that is, the sub-reflector 2 reaches the specified deployment or working position, and the high-gain reflector antenna is in the normal working state.

[0041] Furthermore, combined with Figure 1 , Figure 2 The multi-band integrated feed 6 is fixedly constrained on the central axis of the concave surface of the main reflector 1 through the feed support 7 and passes through the middle gap of the V-shaped deployment arm 8 of the deployable device 3, which not only ensures the irradiation efficiency of the electromagnetic wave, but also avoids the interference between the sub-reflector 2 and the deployable device 3 and the multi-band integrated feed 6 during the deployment process.

[0042] Furthermore, combined with Figure 2 , the electromagnetic wave radiated by the multi-band integrated feed 6 is reflected by the sub-reflector 2 after being deployed and then reflected to the main reflector 1, and then radiated evenly into space.

[0043] The multi-band high-gain reflector antenna described in the present invention adopts a deployable sub-reflector, arranges the sub-reflector and the V-shaped deployable device on the concave surface of the main reflector, and arranges the multi-band integrated feed on the central axis of the main reflector, which can achieve the following advantages:

[0044] 1. The V-shaped deployable device not only realizes the deployment and locking of the sub-reflector, but also further ensures the deployment accuracy and working stability of the sub-reflector after deployment.

[0045] When the sub-reflector is in the retracted state, the longitudinal height of the multi-band high-gain reflector antenna is further compressed, and the retraction ratio can reach 0.52, which not only shortens the longitudinal envelope of the detector, but also reduces the layout difficulty of the detector equipment directly in front of the concave surface of the antenna;

[0046] 3. The application of the V-shaped deployable device and the layout of the multi-band integrated feed ensure the electromagnetic wave irradiation efficiency while avoiding the interference between the deployable device and the multi-band integrated feed during the deployment of the sub-reflector.

[0047] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various deformations or modifications within the scope of the claims, which does not affect the essence of the present invention.

Claims

1. A multi-band high-gain reflector antenna with a deployable sub-reflector, characterized in that, Comprising: a main reflector (1), a sub-reflector (2), a deployable device (3), a number of pressing bases (4), a deployment base (5) and a multi-band integrated feed (6); The sub-reflector (2) and the deployable device (3) are fixedly constrained on the concave surface of the main reflector (1) through a number of the pressing bases (4) and the deployment base (5); The multi-band integrated feed (6) is arranged on the main reflector (1); The sub-reflector (2) completes the deployment and locking actions through the deployable device (3), and the antenna is in the working state after the sub-reflector (2) is deployed; The deployable device (3) adopts a V-shaped deployment structure, including a V-shaped deployment arm (8), a deployment device (9) and a number of pressing and releasing devices (10); On the one hand, the sub-reflector (2) is connected to the deployment device (9) through the V-shaped deployment arm (8), and the deployment device (9) is connected to the deployment base (5); On the other hand, the sub-reflector (2) is connected to the pressing base (4) through the pressing and releasing device (10); The multi-band integrated feed (6) is fixedly constrained on the central axis of the concave surface of the main reflector (1) through a feed support (7) and passes through the middle gap of the V-shaped deployment arm (8).

2. The multi-band high-gain reflector antenna with a deployable sub-reflector according to claim 1, characterized in that, One ends of the two deployment arms of the V-shaped deployment arm (8) are respectively located on both sides of the sub-reflector (2); At least two of the pressing and releasing mechanisms (10) are respectively located on both sides of the sub-reflector (2).

3. The multi-band high-gain reflector antenna with a deployable sub-reflector according to claim 1, characterized in that, The pressing base (4) is arranged in an area on the concave surface of the main reflector (1); The deployment base (5) is arranged in another area on the concave surface of the main reflector (1).

4. The multi-band high-gain reflector antenna with a deployable sub-reflector according to claim 3, characterized in that, After the pressing and releasing device (10) in the deployable device (3) detonates, the deployment arm (8) drives the sub-reflector (2) to rotate by a preset angle around the rotation axis of the deployment device (9) under the driving force of the deployment device (9), and the deployment device (9) is self-locked. After the sub-reflector (2) reaches the preset deployment position, the multi-band high-gain reflector antenna is in the working state.

5. The multi-band high-gain reflector antenna with a deployable sub-reflector according to claim 1 or 4, characterized in that, After the sub-reflector (2) is deployed to the preset position through the deployable device (3), it is used to reflect the electromagnetic waves radiated by the multi-band integrated feed (6) to the main reflector (1); The main reflector (1) is used to uniformly radiate the electromagnetic waves into space.

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