Satellite-borne S-band measurement and control antenna

Abstract

The invention provides a satellite-borne S-band measurement and control antenna, which comprises a choking coil, a protection cover, four-arm spiral band and a phase shifter, and is characterized in that the choking coil is integrally machined, and the overall dimensions and the number of turns of the choking coil can be adaptively changed according to different electrical indicator requirements; the protection cover is molded by a composite material and is effectively adhered to the choking coil so as to form a compact structure; the four-arm spiral band is of a pure metal structure and divided into an inner cylinder and an outer cylinder; phase shifter does not contain a component inside and realizes phase shifting through a metal strip line; and the four-arm spiral band and the phase shifter are designed into a modular assembly and assembled according to different antenna turning direction requirements. Therefore, the antenna provided by the invention has the characteristics of miniaturization, hemispherical beam, wide-angle circular polarization, broadband and the like, the phase shifter of the antenna does not contain components, and the phase shifter and the four-arm spiral band realize radio frequency connection through structural plugging, so that the satellite-borne S-band measurement and control antenna realizes compact structure, miniaturization, light weight and high reliability.

Description

technical field [0001] The invention belongs to the field of navigation, and in particular relates to a space-borne S-band measurement and control antenna for realizing the reception of ground data and the downloading of satellite telemetry data in the form of a four-arm helical antenna. Background technique [0002] Usually, the TT&C antenna works in the S-band. As an important part of the satellite TT&C subsystem, it realizes the reception of ground remote control commands and injected data, as well as the download of satellite telemetry parameters and extended data. Due to the layout of the main load on the navigation satellite and the influence of peripheral equipment, it is very difficult for the measurement and control beam of the satellite measurement and control antenna to achieve full space coverage, and the erection height of the antenna unit needs to be greatly increased, resulting in the antenna unit. The mechanical environment of the transmitting section is more...

AI Technical Summary

Problems solved by technology

However, the existing quadrifilar helical measurement and control antenna phase shifters all contain components, and in addition to the semi-rigid cables embedded inside the quadrifilar helix, the quadrifilar helix and the phase shifter also need to pass through an external semi-rigid cable. The coaxial cable is used to realize the radio frequency connection, which leads to the large size and relatively high weight of the antenna, which cannot meet the harsh on-board mechanical environment requirements of navigation satellites. It needs to be designed with small size, light weight and high reliability

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