CN-122026129-A - Airborne low-profile three-frequency-band satellite communication antenna

CN122026129ACN 122026129 ACN122026129 ACN 122026129ACN-122026129-A

Abstract

The invention discloses an onboard low-profile three-frequency-band satellite communication antenna, which belongs to the technical field of antennas and comprises three antenna array surfaces and an antenna pedestal for realizing three-frequency-band antenna array surface communication. The antenna pedestal comprises an azimuth platform, a pitching mechanism a, a pitching mechanism b and a space truss. In a narrow size space range, the three antenna array surfaces are installed through a highly integrated layout design. The three array planes are arranged in the left, middle and right areas of the upper layer of the whole antenna, and can simultaneously realize 360-degree continuous mechanical scanning movement in azimuth under the drive of the antenna pedestal 4, and the antenna array planes can also simultaneously realize 0-90-degree pitching mechanical scanning movement. The functional devices are divided into two groups according to the use functions and are respectively arranged on the lower layer sheet trusses at the left end and the right end of the space truss, and maintenance of the functional device module level is realized by adopting a sinking disassembly method.

Inventors

MA WANLEI
LI DONG
ZHANG SHUO
WU WEILIANG
MENG ZEYU
LI ZHENSHENG
GAO JIANHAI
WANG YAN
ZHANG RUIDONG

Assignees

中国电子科技集团公司第五十四研究所

Dates

Publication Date: 20260512
Application Date: 20260128

Claims (4)

1. An airborne low-profile three-frequency-band satellite communication antenna is characterized by comprising a main antenna array surface, two side antenna array surfaces and an antenna pedestal (4); The antenna pedestal (4) comprises an azimuth platform (4-1), a pitching mechanism (4-2) and a space truss (4-4), wherein the space truss (4-4) is of a rectangular frame structure, and the azimuth platform (4-1) is positioned below the middle position of the space truss (4-4) and connected with the space truss (4-4) for driving the space truss (4-4) to rotate in azimuth; The pitching mechanism is provided with two groups which are respectively arranged on two sides of the space truss, the main antenna array surface is arranged at the middle position on the space truss, and the side antenna array surfaces are respectively arranged on the corresponding pitching mechanism.
2. The airborne low-profile tri-band satellite communication antenna of claim 1 wherein said space truss (4-4) comprises a longitudinal sheet truss (4-4-1), a transverse sheet truss (4-4-2) and a lower sheet truss (4-4-3), said longitudinal sheet truss and transverse sheet truss each being mounted on an upper surface of the lower sheet truss; the two longitudinal sheet trusses are arranged on the upper surface of the lower sheet truss in parallel, a plurality of transverse sheet trusses are arranged, and two ends of each transverse sheet truss are respectively erected between the two longitudinal sheet trusses.
3. An onboard low profile tri-band satellite communication antenna according to claim 1, characterized in that said azimuth platform (4-1) comprises a base (4-1-1), a turntable (4-1-2), a toothed turntable bearing (4-1-3), an azimuth drive (4-1-4) and a multifunctional slip ring (4-1-5); The turntable (4-1-2) is fixed on the inner ring of the toothed turntable bearing (4-1-3), and is fixedly connected with the space truss; The azimuth drive (4-1-4) is fixed on the turntable (4-1-2) and is meshed with an outer ring gear of the toothed turntable bearing (4-1-3) to drive the turntable (4-1-2) to rotate; The multifunctional slip ring (4-1-5) stator is fixed with the turntable (4-1-2), and the rotor is fixed with the turntable (4-1-2), so that the multifunctional slip ring (4-1-5) synchronously rotates along with the turntable (4-1-2), and continuous transmission of signals is realized.
4. An airborne low profile tri-band satellite communication antenna according to claim 1, wherein said pitch mechanism comprises a pitch arm, a pitch drive and a pitch gear; the pitching support arms of the two groups of pitching mechanisms are respectively arranged at the left end and the right end of the space truss 4-4 and are fixedly connected with the longitudinal sheet trusses 4-4-1 of the space truss 4-4, and the space truss 4-4 drives the two groups of pitching mechanisms to perform azimuth movement; The two groups of pitching support arms respectively support and fix two groups of pitching drives, and the pitching drives are meshed and transmitted through pitching gears; The pitching driving drives the pitching shaft seat to rotate through the pitching gear, and the side antenna array surface is arranged on the pitching bearing and moves along with the pitching shaft seat.

Description

Airborne low-profile three-frequency-band satellite communication antenna Technical Field The invention relates to the technical field of antennas, in particular to a low-profile antenna capable of being provided with three frequency band antenna array surfaces, meeting the requirement of multi-frequency band communication, adapting to the small installation space of an onboard machine, maintaining functional devices and meeting the requirement of vibration resistance. Background With the development of satellite communication antenna technology, the performance requirements of satellite communication antennas on an airborne platform are increasing. Common onboard low-profile satellite communication panel antennas are mostly single-band or dual-band antennas. The antenna pedestal is used as a supporting and orienting device of the antenna, and the antenna can accurately search or track a target under the control of a servo system, but is limited by the size space, vibration conditions and other installation environments, so that more antenna array surfaces are difficult to arrange, and the functional devices cannot meet the requirement of module-level maintenance. How to mount a plurality of frequency band antenna array surfaces in a narrow and limited installation size range, particularly in a low-profile space, improve the multi-frequency band communication performance of the antenna, meet the requirements of maintainability and vibration resistance, and is a problem to be solved in the design of an airborne satellite communication antenna. Disclosure of Invention The invention aims to effectively solve the defects in the background technology, and under the strict limit of installation environment conditions, the antenna is designed to be highly integrated in the whole, so that the installation space is more effectively utilized, and the antenna array surface with three frequency bands can be installed. The antenna pedestal adopts a mode that the azimuth platform, the two groups of pitching mechanisms and the space truss are fused, so that the three antenna array surfaces can be driven to perform mechanical scanning motion simultaneously, and meanwhile, the requirements of vibration resistance and module-level maintainability are met. The technical scheme adopted by the invention is as follows: an airborne low-profile three-frequency-band satellite communication antenna comprises a main antenna array surface, two side antenna array surfaces and an antenna pedestal (4); The antenna pedestal (4) comprises an azimuth platform (4-1), a pitching mechanism (4-2) and a space truss (4-4), wherein the space truss (4-4) is of a rectangular frame structure, and the azimuth platform (4-1) is positioned below the middle position of the space truss (4-4) and connected with the space truss (4-4) for driving the space truss (4-4) to rotate in azimuth; The pitching mechanism is provided with two groups which are respectively arranged on two sides of the space truss, the main antenna array surface is arranged at the middle position on the space truss, and the side antenna array surfaces are respectively arranged on the corresponding pitching mechanism. Further, the space truss (4-4) comprises a longitudinal sheet truss (4-4-1), a transverse sheet truss (4-4-2) and a lower sheet truss (4-4-3), wherein the longitudinal sheet truss and the transverse sheet truss are arranged on the upper surface of the lower sheet truss; the two longitudinal sheet trusses are arranged on the upper surface of the lower sheet truss in parallel, a plurality of transverse sheet trusses are arranged, and two ends of each transverse sheet truss are respectively erected between the two longitudinal sheet trusses. Further, the azimuth platform (4-1) comprises a base (4-1-1), a turntable (4-1-2), a toothed turntable bearing (4-1-3), an azimuth drive (4-1-4) and a multifunctional slip ring (4-1-5); The turntable (4-1-2) is fixed on the inner ring of the toothed turntable bearing (4-1-3), and is fixedly connected with the space truss; The azimuth drive (4-1-4) is fixed on the turntable (4-1-2) and is meshed with an outer ring gear of the toothed turntable bearing (4-1-3) to drive the turntable (4-1-2) to rotate; The multifunctional slip ring (4-1-5) stator is fixed with the turntable (4-1-2), and the rotor is fixed with the turntable (4-1-2), so that the multifunctional slip ring (4-1-5) synchronously rotates along with the turntable (4-1-2), and continuous transmission of signals is realized. Further, the pitching mechanism comprises a pitching support arm, a pitching driving gear and a pitching gear; the pitching support arms of the two groups of pitching mechanisms are respectively arranged at the left end and the right end of the space truss 4-4 and are fixedly connected with the longitudinal sheet trusses 4-4-1 of the space truss 4-4, and the space truss 4-4 drives the two groups of pitching mechanisms to perform azimuth movement; The two groups o