天线反射面和馈源位置误差对电性能的影响规律研究
Research on the influence of antenna reflector and feed position errors on electrical performance
孙伟 1程志峰 1冯立甲1
作者信息
- 1. 中国电子科技集团公司第五十四研究所,河北石家庄 050081
- 折叠
摘要
提出的基于Zernike多项式描述的反射面误差模型,用以分析反射面和馈源位置误差对电性能的影响规律.利用该模型,以标准卡塞格伦13 m 口径天线为研究对象进行建模仿真.研究了反射面位置误差分布、馈源相位中心误差和馈源角度误差对远场方向图的影响规律,结果表明主面X偏移、RY偏移、馈源X偏移,导致了方向图整体偏移,副瓣电平不同程度抬高.主面Y偏移、Z偏移、馈源角度偏移,仅导致副瓣电平不同程度抬高.主面RX偏移对方向图基本无影响,增益损失对Z偏移较为敏感,相同偏移量时,Z偏移对增益损失为X、Y偏移的8倍.
Abstract
In this paper,a reflector error model based on Zernike polynomial description is proposed to analyze the influence of reflector and feed position error on electrical performance.Using this model,a standard Cassegrain 13 m aperture antenna is utilized as the subject of study for modeling and simulation.The influence of reflector position error distribution,feed phase center error,and feed angle error on the far-field pattern are calculated.The results show that the X offset,RY offset of main-reflector,and X offset of feed have led to overall pattern offset,with varying degrees of sidelobe level degradation.The Y offset,Z offset of main-reflector,and angle offset of feed have only led to varying degrees of sidelobe level degradation.The RX offset of main-reflector has little effect on far-field pattern,and gain loss is more sensitive to Z offset of main-reflector.When the offset is the same,the gain loss caused by Z offset is 8 times that of X and Y offset.
关键词
双反射面天线/位置误差分布/Zernike多项式/天线电性能Key words
Dual-reflector antenna/Position error distribution/Zernike polynomials/Antenna electrical performance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据