Two-step Structural Design of Mesh Antennas for High Beam Pointing Accuracy

Chinese Journal of Mechanical Engineering

Wei WANG¹  Yali ZONG¹  Jingli DU¹  Shuxin ZHANG²  Xinghua ZHANG³ 

[1] Key Laboratory of Electronic Equipment Structure Design of Ministry of Education, Xidian University, 710071, Xi’an, China;Key Laboratory of Electronic Equipment Structure Design of Ministry of Education, Xidian University, 710071, Xi’an, China;Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, 100094, Beijing, China;Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, 100094, Beijing, China;

关键词: Cable mesh reflector antennas;    Structural design;    Beam squint;    Beam pointing accuracy;   

DOI  :  10.1007/s10033-017-0134-0

来源: Springer

【 摘 要 】

A well-designed reflector surface with high beam pointing accuracy in electromagnetic performance is of practical significance to the space application of cable mesh reflector antennas. As for space requirements, circular polarizations are widely used in spaceborne antennas, which usually lead to a beam shift for offset reflectors and influence the beam pointing accuracy. A two-step structural design procedure is proposed to overcome the beam squint phenomenon for high beam pointing accuracy design of circularly polarized offset cable mesh reflectors. A simple structural optimal design and an integrated structural electromagnetic optimization are combined to alleviate the beam squint effect of circular polarizations. It is implemented by cable pretension design and adjustment to shape the offset cable mesh surface. Besides, in order to increase the efficiency of integrated optimization, an update Broyden-Fletcher-Goldfarb-Shanno (BFGS) Hessian matrix is employed in the optimization iteration with sequential quadratic programming. A circularly polarized offset cable mesh reflector is utilized to show the feasibility and effectiveness of the proposed procedure. A high beam pointing accuracy in order of 0.0001º of electromagnetic performance is achieved.

【 授权许可】

CC BY