Heuristic Best-Fitting-Paraboloid Method for Gravity-Distorted Reflector Antennas

This paper presents a heuristic best-fitting-paraboloid method (BFPH), tailored for reflector antennas subject to gravitational distortion. Firstly, the best fitting problem is formulated a nonlinear least-squares problem (NLSP) for the distorted reflector, wherein three heuristic rules, crucial for...

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Bibliographic Details
Published inIEEE transactions on antennas and propagation p. 1
Main Authors Tan, Guodong, Wang, Qunbiao, Rocca, Paolo, Duan, Xuechao, Yang, Dongwu, Feng, Shufei, Chen, Guangda
Format Journal Article
LanguageEnglish
Published IEEE 20.09.2024
Subjects
Accuracy
Antenna feeds
antenna gain
Antenna theory
Fitting
gravitational distortion
heuristic best-fitting paraboloid
Nonlinear distortion
pointing error
Reflector antenna
Reflector antennas
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Summary:This paper presents a heuristic best-fitting-paraboloid method (BFPH), tailored for reflector antennas subject to gravitational distortion. Firstly, the best fitting problem is formulated a nonlinear least-squares problem (NLSP) for the distorted reflector, wherein three heuristic rules, crucial for the problem at hand, are derived based on two typical distortion modes observed in antennas. Then, a suitable optimization algorithm is employed to solve the NLSP, in which a customized strategy is developed for the definition of the initial value in order to guarantee effective and reliable final solutions. A set of numerical results are reported and discussed to demonstrate the superior performance of the BFPH method in comparison to existing state-of-the-art methods. More specifically, it supplies higher antenna gain, reduced pointing error, enhanced robustness, and better symmetry in the far-field pattern.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2024.3455794