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Study on CFM Method for Beam Compensation of Array-Fed Space-Borne Reflector Antennas | IEEE Conference Publication | IEEE Xplore

Study on CFM Method for Beam Compensation of Array-Fed Space-Borne Reflector Antennas


Abstract:

Space-borne reflector antennas have gain wide application for their unique advantages, and if they are fed by array antennas, the beam can be controlled freely. However, ...Show More

Abstract:

Space-borne reflector antennas have gain wide application for their unique advantages, and if they are fed by array antennas, the beam can be controlled freely. However, for the factors of extremely changing space temperature, repeated development, assembly errors and so on, the beams of deployable antennas will be deteriorated. To achieve anticipative performance, beam compensation should be performed. In the study, influences of the reflector's global, local and mixed deformations on the antenna performances are investigated by physical optics (PO) method, and the conjugate field matching (CFM) method, an easy and time-efficient method, is employed to compensate the beam degradation. The effectiveness of beam compensation by CFM for different kinds of reflector surface deformations are researched and compared. The results show that the beam pointing accuracy can be well compensated for all types of deformations, while the compensation effect is good under global deformations, but bad under local deformations.
Date of Conference: 17-22 March 2024
Date Added to IEEE Xplore: 26 April 2024
ISBN Information:
Conference Location: Glasgow, United Kingdom

Funding Agency:


I. Introduction

Space-borne antennas are mainly used for signal transmission between satellites and the ground. The long transmission distance requires accurate beam pointing of space-borne antennas. Beam pointing error results in the failure of the signal transmission mission. Due to the global and local deterioration, the beam pointing error greatly affects the communication [1]. Deformations on the antenna reflector surface will occur because of extreme temperature, microgravity environment and repeated deployment and so on [2]. All these errors will affect the beam performance, and accordingly the focal plane field will also change. What's more, with the operating frequency increasing, this negative effect will be more remarkable.

References

References is not available for this document.