Effect of Facet Displacement on Radiation Field and Its Application for Panel Adjustment of Large Reflector Antenna

Chinese Journal of Mechanical Engineering

Peiyuan LIAN¹  Wei WANG²  Shuxin ZHANG²  Binbin XIANG³  Qian XU⁴ 

[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;Collaborative Innovation Center of Information Sensing and Understanding, Xidian University, 710071, Xi’an, China;Key Laboratory of Electronic Equipment Structure Design of Ministry of Education, Xidian University, 710071, Xi’an, China;Xinjiang Astronomical Observation, Chinese Academy of Sciences, 830011, Urumqi, China;Xinjiang Astronomical Observation, Chinese Academy of Sciences, 830011, Urumqi, China;

关键词: Reflector antennas;    Surface accuracy;    Radiation field;    Reflector antenna mechanical factors;    Electromechanical effects;    Panel adjustment;    Singular value decomposition (SVD);   

DOI  :  10.1007/s10033-017-0135-z

来源: Springer

【 摘 要 】

Large reflector antennas are widely used in radars, satellite communication, radio astronomy, and so on. The rapid developments in these fields have created demands for development of better performance and higher surface accuracy. However, low accuracy and low efficiency are the common disadvantages for traditional panel alignment and adjustment. In order to improve the surface accuracy of large reflector antenna, a new method is presented to determinate panel adjustment values from far field pattern. Based on the method of Physical Optics (PO), the effect of panel facet displacement on radiation field value is derived. Then the linear system is constructed between panel adjustment vector and far field pattern. Using the method of Singular Value Decomposition (SVD), the adjustment value for all panel adjustors are obtained by solving the linear equations. An experiment is conducted on a 3.7 m reflector antenna with 12 segmented panels. The results of simulation and test are similar, which shows that the presented method is feasible. Moreover, the discussion about validation shows that the method can be used for many cases of reflector shape. The proposed research provides the instruction to adjust surface panels efficiently and accurately.

【 授权许可】

CC BY