Satellite-borne mechanical movable antenna with two-dimensional pointing mechanism

Abstract

The invention provides a mechanical movable antenna. The mechanical movable antenna comprises a first support; the X-axis driving motor is mounted on the first bracket; the second bracket is mounted on the first bracket through an X-axis driving motor and can rotate around the X axis relative to the first bracket under the driving of the X-axis driving motor; the Y-axis and the Y-axis driving motor are arranged on the second bracket; the antenna reflecting surface is installed on the second support through a Y-axis driving motor, the antenna reflecting surface is provided with a central through hole, the central through hole is located on the Y axis, the feed source wave beam coincides with the Y axis and penetrates through the central through hole, and the antenna reflecting surface can rotate around the Y axis relative to the second support under the driving of the Y-axis driving motor; and after passing through the central through hole, the feed source wave beam firstly enters the antenna auxiliary reflecting surface, then is reflected to the antenna reflecting surface, and finally is reflected out by the antenna reflecting surface.

Description

Technical Field

[0001] The invention relates to a satellite-borne mechanical movable antenna with a two-dimensional pointing mechanism, and in particular to an XY-type pointing mechanism for the mechanical movable antenna. Background Art

[0002] In satellite-borne microwave communication and laser communication scenarios, it is often necessary to use a pointing mechanism to adjust the pointing position of the antenna or laser terminal to obtain high communication gain in a specified direction. The mechanical movable antenna drives the antenna aperture to rotate through the pointing mechanism, thereby realizing the movement and switching of the beam, and can establish a point-to-point wireless link. It is often used in spot beam communication, data transmission, data relay, etc. The common mechanical movable antenna pointing mechanism is an XY-type structure, such as the antenna rotation mechanism disclosed in patent application 201010298062.7 (a spatial two-dimensional antenna rotation mechanism).

[0003] The conventional structure of the XY-type pointing mechanism for the mechanically movable antenna is as follows: Figure 1 As shown, under the action of the X-axis drive motor and the Y-axis drive motor, the pointing mechanism can drive the antenna reflector to move around the X-rotation axis and the Y-rotation axis. This XY-type pointing mechanism can perform overhead continuous tracking, but it is not easy to achieve static balance. To achieve a larger range of motion, the distance between the two axes needs to be increased. In addition, the XY-type pointing mechanism needs to match a rotating joint at the X-rotation axis and the Y-rotation axis to ensure the continuity of the microwave signal. The rotating joints are very expensive, resulting in a high cost for the XY-type pointing mechanism. In addition, the Y-axis in the XY-type pointing mechanism is a typical unbalanced load, which requires high driving capability. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problem and provide a satellite-borne mechanical movable antenna with a two-dimensional pointing mechanism. Only one rotating joint is used to complete the over-the-top continuous tracking of the antenna. The load on the Y-axis is a balanced load, which can reduce the axis system pressure.

[0005] The present application provides a mechanically movable antenna, comprising:

[0006] First bracket;

[0007] An X-axis and an X-axis driving motor, wherein the X-axis driving motor is mounted on the first bracket;

[0008] The second bracket is mounted on the first bracket via an X-axis driving motor and can rotate around the X-axis relative to the first bracket under the drive of the X-axis driving motor;

[0009] A Y-axis and a Y-axis driving motor, wherein the Y-axis driving motor is mounted on the second bracket;

[0010] The antenna reflector is mounted on the second bracket through a Y-axis drive motor. The antenna reflector has a central through hole, which is located on the Y-axis. The feed beam coincides with the Y-axis and passes through the central through hole. The antenna reflector can rotate around the Y-axis relative to the second bracket under the drive of the Y-axis drive motor.

[0011] Antenna sub-reflector, after the feed beam passes through the central through hole, it first enters the antenna sub-reflector, then is reflected onto the antenna reflector, and finally is reflected out by the antenna reflector.

[0012] According to the antenna provided by at least one embodiment, the antenna reflecting surface is driven by the Y-axis driving motor to rotate around the central through hole.

[0013] According to at least one embodiment, the antenna is provided, wherein the antenna sub-reflection surface rotates synchronously with the antenna reflection surface.

[0014] According to the antenna provided in at least one embodiment, the mechanically movable antenna is a satellite-borne mechanically movable antenna.

[0015] According to the antenna provided by at least one embodiment, the feed beam is kept stationary, and the antenna sub-reflection surface is driven to rotate by the antenna reflection surface to realize the scanning of the beam around the Y axis.

[0016] According to the antenna provided by at least one embodiment, the center of gravity of the antenna reflection surface is adjusted to coincide with the Y-axis, so that the load on the Y-axis is a balanced load in the absence of gravity.

[0017] According to at least one embodiment, an antenna is provided, wherein the X-axis is perpendicular to the Y-axis.

[0018] According to the antenna provided in at least one embodiment, a heightening frame is provided between the base and the first bracket.

[0019] According to the antenna provided in at least one embodiment, the antenna further includes a base, and the first bracket is fixedly mounted on the base.

[0020] According to the antenna provided in at least one embodiment, the antenna sub-reflection surface is installed on the antenna reflection surface in an offset feeding manner.

[0021] In the mechanical movable antenna provided by the present application, only one rotating joint is used to complete the over-the-top continuous tracking of the antenna, which can save one rotating joint. In the absence of gravity, the load on the Y axis is a balanced load, which can reduce the pressure on the axis system and increase the life of the pointing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following will further explain the above characteristics, technical features, advantages and implementation methods of the present application in a clear and understandable manner through the description of the preferred embodiments and in combination with the accompanying drawings. The following drawings are only intended to illustrate and explain the present application, and do not limit the scope of the present application. Among them:

[0023] Figure 1 The present invention shows the existing structure of an XY type pointing mechanism for a mechanically movable antenna;

[0024] Figure 2 The structure of a mechanically movable antenna according to an embodiment of the present application is shown;

[0025] Figure 3 The structure of a pointing mechanism according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific implementation methods of the present application are now described with reference to the accompanying drawings.

[0027] The present application provides a satellite-borne mechanical movable antenna with a two-dimensional pointing mechanism, in which the pointing direction of the reflector antenna feed beam coincides with the Y-axis, and the scanning of the beam in the Y-axis direction can be completed by rotating the reflector device, which can save a rotating joint.

[0028] In the satellite-borne mechanical movable antenna with a two-dimensional pointing mechanism provided in the present application, the center of gravity of the antenna reflecting surface is adjusted to coincide with the Y-axis. In the absence of gravity, the load on the Y-axis is a balanced load, which can reduce the axis system pressure and increase the life of the pointing mechanism.

[0029] According to one embodiment of the present application, a space-borne mechanically movable antenna with an XY-type pointing mechanism is provided. Figure 2 The structure of the mechanically movable antenna is shown. Figure 3 The structure of its XY pointing mechanism is shown, including:

[0030] Base 10;

[0031] A first bracket 1, fixedly mounted on a base 10;

[0032] An X-axis 21 and an X-axis driving motor 31, wherein the X-axis driving motor 31 is mounted on the first bracket 1;

[0033] The second bracket 2 is mounted on the first bracket 1 through the X-axis driving motor 31, and can rotate around the X-axis 21 relative to the first bracket 1 under the drive of the X-axis driving motor 31;

[0034] A Y-axis 22 and a Y-axis driving motor 32, wherein the Y-axis driving motor 32 is mounted on the second bracket 2, and the Y-axis is perpendicular to the X-axis;

[0035] The antenna reflector 4 is mounted on the second bracket 2 through the Y-axis drive motor 32. The antenna reflector 4 has a central through hole 41, which is located on the Y-axis 22. The feed beam coincides with the Y-axis 22 and passes through the central through hole 41. The antenna reflector 4 can rotate around the Y-axis 22 relative to the second bracket 2 under the drive of the Y-axis drive motor 32, so as to realize the rotation of the antenna reflector 4 around the central through hole 41.

[0036] The antenna sub-reflector 5 is installed on the antenna reflector 4 in an offset feeding manner and can rotate synchronously with the antenna reflector 4. After the feed source beam passes through the central through hole 41, it first enters the antenna sub-reflector 5, then is reflected onto the antenna reflector 4, and finally is reflected out by the antenna reflector 4.

[0037] In the mechanical movable antenna provided in this embodiment, the second bracket 2 can be rotated around the X-axis 21 by the X-axis driving motor 31 on the first bracket 1, and the antenna reflector 4 can be rotated around the Y-axis 22 by the Y-axis driving motor 32 on the second bracket 2, thereby realizing the scanning of the antenna reflector 4 around the X-axis 21 and the Y-axis 22. In this embodiment, the feed beam coincides with the Y-axis and passes through the central through hole 41. Therefore, the feed beam is kept stationary and the antenna sub-reflector 5 is driven to rotate only by the antenna reflector 4. There is no need for a rotating joint matching the Y-axis, and only a rotating joint matching the X-axis can be used to complete the over-the-top continuous tracking of the antenna.

[0038] According to one embodiment of the present application, the center of gravity of the antenna reflecting surface 4 is adjusted to coincide with the Y-axis. At this time, in a zero-gravity condition, the load on the Y-axis is a balanced load, which can reduce the axis system pressure and increase the life of the pointing mechanism.

[0039] According to an embodiment of the present application, a heightening frame may be provided between the base and the first bracket, and the height of the heightening frame may be determined according to actual needs.

[0040] The above description is only an illustrative embodiment of the present application and is not intended to limit the scope of the present application. Any equivalent changes, modifications and combinations made by any technician in the field without departing from the concept and principle of the present application shall fall within the scope of protection of the present application.

Claims

1. A mechanically movable antenna, comprising: First bracket; An X-axis and an X-axis driving motor, wherein the X-axis driving motor is mounted on the first bracket; The second bracket is mounted on the first bracket via an X-axis driving motor and can rotate around the X-axis relative to the first bracket under the drive of the X-axis driving motor; A Y-axis and a Y-axis driving motor, wherein the Y-axis driving motor is mounted on the second bracket; The antenna reflector is mounted on the second bracket through a Y-axis drive motor. The antenna reflector has a central through hole, which is located on the Y-axis. The feed beam coincides with the Y-axis and passes through the central through hole. The antenna reflector can rotate around the Y-axis relative to the second bracket under the drive of the Y-axis drive motor. Antenna sub-reflector, after the feed beam passes through the central through hole, it first enters the antenna sub-reflector, then is reflected onto the antenna reflector, and finally is reflected out by the antenna reflector.

2. The antenna according to claim 1, wherein: The antenna reflector is driven by the Y-axis drive motor to rotate around the central through hole.

3. The antenna according to claim 1, wherein: The antenna sub-reflector rotates synchronously with the antenna reflector.

4. The antenna according to claim 1, wherein: The mechanically movable antenna is a satellite-borne mechanically movable antenna.

5. The antenna according to claim 1, wherein: Keep the feed beam stationary, and drive the antenna sub-reflector to rotate through the antenna reflector to achieve beam scanning around the Y axis.

6. The antenna according to claim 1, wherein: The center of gravity of the antenna reflector is adjusted to coincide with the Y-axis, so that the load on the Y-axis is a balanced load in the absence of gravity.

7. The antenna according to claim 1, wherein: The X-axis is perpendicular to the Y-axis.

8. The antenna according to claim 1, wherein: An elevated frame is arranged between the base and the first bracket.

9. The antenna according to claim 1, wherein: The antenna also includes a base, and the first bracket is fixedly mounted on the base.

10. The antenna according to claim 1, wherein: The antenna sub-reflector is installed on the antenna reflector in an offset feeding manner.

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