Luneberg lens antenna servo equipment capable of realizing dual-frequency low-orbit tracking

Abstract

The utility model discloses a Luneberg lens antenna servo device capable of realizing double-frequency low-orbit tracking, which relates to the technical field of communication antennas and comprises a hemispherical Luneberg lens antenna surface, a reflecting plate, a Ku feed source, a Ka feed source, a feed source support, an azimuth rotation turntable, a pitching rotation support and a rolling rotation slide rail. And the reflecting plate is mounted on the bottom side of the antenna surface of the hemispherical Luneberg lens. By adopting an A-E-C structural form, a transverse rolling shaft is made into a sliding rail, so that a luneberg lens spherical antenna surface keeps still, a Ku feed source and a Ka feed source do arc-shaped motion along with the sliding rail, angle change of a transverse rolling wave beam is realized, the height of the hemispherical luneberg lens antenna surface does not need to be raised, the motion envelope is the same as the envelope height of a same-caliber two-shaft structure, and the angle change of the transverse rolling wave beam is realized. Compared with an A-C-E structure type three-axis antenna, the overall height is obviously reduced, the structure reliability is higher, the weight is lighter, the antenna is more suitable for an installation carrier with the limited space size, top-crossing tracking is achieved, and continuous and reliable low-orbit satellite communication is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of communication antennas, in particular to a Luneburg lens antenna servo device capable of realizing dual-frequency low-orbit tracking. Background Art

[0002] The moving satellite communication antenna is a servo device that maintains satellite communication during the movement of the carrier. It is suitable for driving the satellite communication antenna servo mechanism to capture and track the satellite, and maintain the stability and reliability of the satellite communication. Common satellite communication antennas include parabolic antennas, flat array antennas and Luneburg lens antennas. Among them, the Luneburg lens antenna is a spherical antenna made of materials with different dielectric constants, and the dielectric constant decreases from the center of the sphere to the surface of the sphere. The Luneburg lens antenna servo device involved in the utility model is designed according to the shape, weight and working mode of the dielectric sphere, the reflecting surface and the feed source, and is vertically installed on the mounting base of the carrier. It can drive the antenna to search and capture the target satellite, while maintaining stable and reliable tracking, providing an important guarantee for the effective transmission of high-quality satellite communications on the basis of meeting performance requirements.

[0003] The servo equipment receives external inertial navigation data and various sensor data on the servo unit, and through program control, conical scanning and closed-loop inertial attitude control, can firstly realize the initial satellite alignment, automatic search, automatic tracking and other processes; secondly, it can drive the antenna azimuth, pitch and polarization axis to automatically reach the position and compensate for the carrier disturbance, so as to achieve fast, accurate and stable alignment with the target satellite.

[0004] In order to realize low-orbit satellite communication and solve the problem of overhead tracking, the commonly used Luneburg lens satellite communication system adopts the ACE structure, that is, the azimuth-roll-pitch three-axis structure. The motion envelope of this structure is significantly higher than that of the two-axis structure, and its reliability is poor. It is difficult to meet the requirements of environmental adaptability tests such as impact vibration. For this reason, this application proposes a Luneburg lens antenna servo device that can realize dual-frequency low-orbit tracking to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a Luneburg lens antenna servo device capable of realizing dual-frequency low-orbit tracking, which solves the technical problems raised in the above background.

[0007] (II) Technical solution

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is: a Luneburg lens antenna servo device capable of realizing dual-frequency low-orbit tracking, comprising a hemispherical Luneburg lens antenna surface, a reflector, a Ku feed, a Ka feed, a feed bracket, an azimuth rotation turntable, a pitch rotation bracket, and a roll rotation slide rail, wherein the reflector is mounted on the bottom side of the hemispherical Luneburg lens antenna surface, and the reflector is connected to the pitch rotation bracket, the pitch rotation bracket is mounted on the azimuth rotation turntable, and the Ku feed and the Ka feed are mounted on the feed bracket The feed bracket is installed on the slide seat of the roll rotation slide rail, and the slide rail of the roll rotation slide rail is installed on the azimuth rotation turntable. The Ku feed and the Ka feed are arranged left and right, and are placed symmetrically with respect to the central axis of the reflector. The Ku feed is set at the focal position of the hemispherical Luneburg lens antenna surface, and the Ka feed is set at the focal position of the hemispherical Luneburg lens antenna surface. The roll rotation slide rail is an arc-shaped slide rail, and the center of the roll rotation slide rail is at the same position as the center of the hemispherical Luneburg lens antenna surface.

[0009] Preferably, the pitch rotation bracket realizes the rotation of the pitch axis through sector gear transmission, and the pitch rotation angle is -17° to +34°. The roll rotation slide rail realizes the rotation of the roll axis through arc gear transmission, and the roll angle is -15° to +15°.

[0010] Preferably, the angle between the Ku feed and the Ka feed is 20°, and they deviate from the middle normal by 10° respectively, the angles between the Ku feed and the Ka feed and the horizontal plane are both 31°, and the focal length between the Ku feed and the Ka feed is 20 mm.

[0011] Preferably, the horn mouth of the Ku feed points to the center of the hemispherical Luneburg lens antenna surface, and the horn mouth of the Ka feed points to the center of the hemispherical Luneburg lens antenna surface.

[0012] Preferably, the hemispherical Luneburg lens antenna surface is a spherical antenna made of materials with different dielectric constants, and the dielectric constant decreases from the center of the lens to the spherical surface.

[0013] Preferably, the reflector is an elliptical plate made of metal material, and is used to reflect the antenna beam.

[0014] Preferably, the azimuth rotating turntable is made of aluminum alloy material, and the azimuth rotating turntable realizes the rotation of the azimuth axis through gear transmission, and the azimuth rotation angle is 360° continuous rotation.

[0015] (III) Beneficial effects

[0016] The beneficial effects of the utility model are:

[0017] The Luneburg lens antenna servo device capable of realizing dual-frequency low-orbit tracking adopts an AEC structure and makes the roll axis into a slide rail, so that the Luneburg lens spherical antenna surface remains stationary, and the Ku feed and the Ka feed move in an arc shape with the slide rail, thereby realizing the angle change of the roll beam. This structure does not need to raise the height of the hemispherical Luneburg lens antenna surface, and the motion envelope is the same as the envelope height of the two-axis structure with the same aperture. Compared with the three-axis antenna with an ACE structure, the overall height is significantly reduced, and the structural reliability is stronger and the weight is lighter. It is more suitable for installation carriers with limited space dimensions, realizing over-the-top tracking and ensuring continuous and reliable low-orbit satellite communications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the overall structure of a Luneburg lens antenna servo device provided by an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the structure of a Luneburg lens antenna and a reflector provided in an embodiment of the utility model;

[0020] Figure 3 A schematic diagram of the arrangement of the Ku feed and the Ka feed of the Luneburg lens antenna servo device provided in an embodiment of the utility model;

[0021] Figure 4 A schematic diagram of the angles between the Ku feed and the Ka feed of the Luneburg lens antenna servo device provided in the embodiment of the utility model and the horizontal plane;

[0022] Figure 5 A schematic diagram of the motion envelope height of the Luneburg lens antenna servo device provided by an embodiment of the utility model;

[0023] Figure 6 A schematic diagram of the structure of the azimuth rotation turntable of the Luneburg lens antenna servo device provided by the embodiment of the utility model;

[0024] Figure 7 A schematic structural diagram of a pitch rotation bracket of a Luneburg lens antenna servo device provided in an embodiment of the utility model;

[0025] Figure 8 A schematic structural diagram of a rolling and rotating slide rail of a Luneburg lens antenna servo device provided in an embodiment of the utility model.

[0026] In the figure: 1. Hemispherical Luneburg lens antenna surface; 2. Reflector; 3. Ku feed; 4. Ka feed; 5. Feed bracket; 6. Azimuth rotation turntable; 7. Pitch rotation bracket; 8. Roll rotation slide rail. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] The utility model provides a technical solution: a Luneburg lens antenna servo device for realizing dual-frequency low-orbit tracking, comprising a hemispherical Luneburg lens antenna surface 1, a reflector 2, a Ku feed 3, a Ka feed 4, a feed bracket 5, an azimuth rotation turntable 6, a pitch rotation bracket 7, and a roll rotation slide rail 8. The hemispherical Luneburg lens antenna surface 1 is a spherical antenna made of materials with different dielectric constants, and the dielectric constant decreases from the center of the lens to the spherical surface. The reflector 2 is installed on the bottom side of the hemispherical Luneburg lens antenna surface 1, and the reflector 2 is connected to the pitch rotation bracket 7. The pitch rotation bracket 7 is installed on the azimuth rotation turntable 6, the reflector 2 is an irregularly shaped plate made of metal material, which is used to reflect the antenna beam, the Ku feed 3 and the Ka feed 4 are installed on the feed bracket 5, the feed bracket 5 is installed on the slide seat of the roll rotation slide rail 8, and the slide rail of the roll rotation slide rail 8 is installed on the azimuth rotation turntable 6, the Ku feed 3 and the Ka feed 4 are arranged left and right, and are symmetrically placed relative to the central axis of the reflector 2, the angle between the Ku feed 3 and the Ka feed 4 is 20°, and they are respectively deviated from the middle method The Ku feed 3 is arranged at the focal position of the hemispherical Luneburg lens antenna surface 1, and the Ka feed 4 is also arranged at the focal position of the hemispherical Luneburg lens antenna surface 1. The angles between the Ku feed 3 and the Ka feed 4 and the horizontal plane are both 31°, and the focal lengths between the Ku feed 3 and the Ka feed 4 are both 20 mm. The horn of the Ku feed 3 points to the center of the hemispherical Luneburg lens antenna surface 1, and the horn of the Ka feed 4 points to the center of the hemispherical Luneburg lens antenna surface 1. The hemispherical Luneburg lens antenna surface 1 is installed on the pitch rotation bracket 7, and the horizontal The roll-rotating slide rail 8 is an arc-shaped slide rail, and the center of the roll-rotating slide rail 8 is at the same position as the center of the hemispherical Luneburg lens antenna surface 1. The pitch-rotating bracket 7 realizes the rotation of the pitch axis through a fan-shaped gear transmission, and the pitch rotation angle is -17° to +34°. The roll-rotating slide rail 8 realizes the rotation of the roll axis through an arc gear transmission, and the roll angle is -15° to +15°. The azimuth-rotating turntable 6 is made of aluminum alloy material, and the azimuth-rotating turntable 6 realizes the rotation of the azimuth axis through gear transmission, and the azimuth rotation angle is 360° continuous rotation.

[0029] Example

[0030] like Figure 1As shown, the utility model provides a Luneburg lens antenna servo device capable of realizing dual-frequency low-orbit tracking, which adopts an AEC three-axis structural design, namely an azimuth-pitch-roll three-axis structural form, including a hemispherical Luneburg lens antenna surface 1, a reflector 2, a Ku feed 3, a Ka feed 4, a feed bracket 5, an azimuth rotation turntable 6, a pitch rotation bracket 7, and a roll rotation slide rail 8.

[0031] like Figure 2 As shown, it is a schematic diagram of the structure of the hemispherical Luenburg lens antenna surface 1 and the reflector 2 provided in this embodiment. The hemispherical Luenburg lens antenna surface 1 is a spherical antenna made of materials with different dielectric constants, and the dielectric constant decreases from the center of the lens to the spherical surface. The reflector 2 is an irregularly shaped plate made of metal material, which is used to reflect the antenna beam. When the beam enters the hemispherical Luenburg lens antenna surface 1, the beam is reflected once by the reflector 2, thereby changing the propagation direction of the beam and realizing the same beam focusing function as the whole sphere.

[0032] like Figure 3 Figure 4 As shown, it is a schematic diagram of the arrangement of the Ku feed 3 and the Ka feed 4 provided in this embodiment, the Ku feed 3 is arranged at the focal position of the hemispherical Luenburg lens antenna surface 1, and the horn of the Ku feed 3 points to the center of the hemispherical Luenburg lens antenna surface 1, the Ka feed 4 is also arranged at the focal position of the hemispherical Luenburg lens antenna surface 1, and the horn of the Ka feed 4 points to the center of the hemispherical Luenburg lens antenna surface 1, the Ku feed 3 and the Ka feed 4 are mounted on the feed bracket 5 in a left-right arrangement, symmetrically placed relative to the central axis of the reflector 2, the angle between the Ku feed 3 and the Ka feed 4 is 20°, deviating from the middle normal by 10° respectively, the angles between the Ku feed 3 and the Ka feed 4 and the horizontal plane are both 31°, and the focal length between the Ku feed 3 and the Ka feed 4 is 20 mm.

[0033] like Figure 5 As shown, it is a schematic diagram of the motion envelope height of the servo device provided in this embodiment. Under this structure, the overall motion envelope height of the servo device is only 277mm, which is the same as the envelope height of the two-axis structure with the same caliber. That is, without increasing the overall height, this embodiment realizes a three-axis structure design and can meet the overhead tracking requirements.

[0034] like Figure 6 As shown, it is a schematic diagram of the structure of the azimuth rotating turntable 6 provided in this embodiment. The azimuth rotating turntable 6 realizes the rotation of the azimuth axis through gear transmission. The azimuth rotation angle is 360° continuous rotation. The remaining structural parts of the servo equipment are installed on the azimuth rotating turntable 6 and rotate with the rotation of the azimuth turntable to ensure that the antenna beam azimuth rotation range is 360° continuous.

[0035] like Figure 7As shown, it is a schematic diagram of the structure of the pitch rotation bracket 7 provided in this embodiment. Since the form of a hemisphere plus a reflector 2 can achieve the same beam focusing function as the whole sphere, and the reflector 2 can reflect the beam rotation angle, so that the reflected wave changes by 2 times, that is, when the mechanical rotation angle of the reflector 2 changes by 1°, the antenna beam angle actually changes by 2°, which can effectively reduce the mechanical rotation angle of the reflector 2, thereby reducing the overall height of the servo device. The pitch rotation bracket 7 realizes the rotation of the pitch axis through a sector gear transmission, the pitch mechanical rotation angle is -17° to +34°, and the antenna beam pitch angle rotation range is -3° to +99°.

[0036] like Figure 8 , which is a schematic diagram of the structure of the roll rotation slide rail 8 provided in this embodiment. The roll rotation slide rail 8 is an arc-shaped slide rail, and the center of the circle is at the same position as the center of the hemispherical Luneburg lens antenna surface 1. The rotation of the roll axis is achieved by arc gear transmission, and the roll angle is -15° to +15°. In this embodiment, the roll axis is not achieved by fixing the feed source and rotating the hemispherical Luneburg lens antenna surface 1, but by fixing the feed source bracket 5 on the slide seat on the roll rotation slide rail 8, so that the Ku feed source 3 and the Ka feed source 4 slide on the slide rail with the slide seat to make an arc motion and maintain The Ku feed 3 and the Ka feed 4 always point to the center of the hemispherical Luneburg lens antenna surface 1, so that the angle change of the roll beam can be achieved while keeping the hemispherical Luneburg lens antenna surface 1 unchanged. This form does not need to raise the height of the hemispherical Luneburg lens antenna surface 1, and the motion envelope is the same as the envelope height of the two-axis structure with the same aperture. Compared with the ACE structure three-axis antenna, the overall height is significantly reduced, and the structural reliability is stronger and the weight is lighter. It is more suitable for installation carriers with limited space dimensions, realizing overhead tracking and ensuring continuous and reliable low-orbit satellite communications.

[0037] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A Luneburg lens antenna servo device capable of realizing dual-frequency low-orbit tracking, characterized in that: The invention comprises a hemispherical Luneburg lens antenna surface (1), a reflector (2), a Ku feed (3), a Ka feed (4), a feed bracket (5), an azimuth rotation turntable (6), a pitch rotation bracket (7), and a roll rotation slide rail (8), wherein the reflector (2) is mounted on the bottom side of the hemispherical Luneburg lens antenna surface (1), and the reflector (2) is connected to the pitch rotation bracket (7), the pitch rotation bracket (7) is mounted on the azimuth rotation turntable (6), the Ku feed (3) and the Ka feed (4) are mounted on the feed bracket (5), and the feed bracket (5) is mounted on the roll rotation turntable (8). The invention relates to a method for manufacturing a reflector for a reflector plate (2). The reflector plate (2) is a device for manufacturing a reflector plate (2) and a device for manufacturing a reflector plate (2). The reflector plate (2) is provided on a slide seat of a movable slide rail (8), and the slide rail of the roll rotation slide rail (8) is installed on an azimuth rotation turntable (6). The Ku feed source (3) and the Ka feed source (4) are arranged left and right, and are symmetrically placed relative to the central axis of the reflector plate (2). The Ku feed source (3) is arranged at a focal position of the hemispherical Luneburg lens antenna surface (1), and the Ka feed source (4) is arranged at a focal position of the hemispherical Luneburg lens antenna surface. The roll rotation slide rail (8) is an arc-shaped slide rail, and the center of the roll rotation slide rail (8) is at the same position as the center of the hemispherical Luneburg lens antenna surface (1).

2. The Luneburg lens antenna servo device capable of realizing dual-frequency low-orbit tracking according to claim 1, characterized in that: The pitch rotation bracket (7) realizes the rotation of the pitch axis through sector gear transmission, and the pitch rotation angle is -17° to +34°. The roll rotation slide rail (8) realizes the rotation of the roll axis through arc gear transmission, and the roll angle is -15° to +15°.

3. The Luneburg lens antenna servo device capable of realizing dual-frequency low-orbit tracking according to claim 1, characterized in that: The angle between the Ku feed (3) and the Ka feed (4) is 20°, and each of them deviates from the middle normal by 10°. The angles between the Ku feed (3) and the Ka feed (4) and the horizontal plane are both 31°. The focal length between the Ku feed (3) and the Ka feed (4) is 20 mm.

4. The Luneburg lens antenna servo device capable of realizing dual-frequency low-orbit tracking according to claim 1, characterized in that: The horn mouth of the Ku feed source (3) points to the center of the hemispherical Luneburg lens antenna surface (1), and the horn mouth of the Ka feed source (4) points to the center of the hemispherical Luneburg lens antenna surface.

5. The Luneburg lens antenna servo device capable of realizing dual-frequency low-orbit tracking according to claim 1, characterized in that: The hemispherical Luneburg lens antenna surface (1) is a spherical antenna made of materials with different dielectric constants, and the dielectric constant decreases from the center of the lens to the spherical surface.

6. The Luneburg lens antenna servo device capable of realizing dual-frequency low-orbit tracking according to claim 1, characterized in that: The reflective plate (2) is an elliptical plate made of metal material.

7. The Luneburg lens antenna servo device capable of realizing dual-frequency low-orbit tracking according to claim 1, characterized in that: The azimuth rotating turntable (6) is made of aluminum alloy material, and the azimuth rotating turntable (6) realizes the rotation of the azimuth axis through gear transmission, and the azimuth rotation angle is 360° continuous rotation.

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