电波科学学报2024，Vol.39Issue(3)：484-491,8.DOI:10.12265/j.cjors.2023165
基于均匀分布偶极子的天线辐射场建模方法
Modeling of antenna radiation field based on uniformly distributed dipoles
摘要
Abstract
Target electromagnetic scattering is related to radar observed antenna in the near field,and a modeling method for antenna radiation field is developed based on dipole models.The dipole models include electric and magnetic dipoles whose position is uniformly distributed on the antenna radiation aperture.Through coordinate transformation of dipole radiation field and spherical wave expansion(SWE)of antenna radiation field,a linear matrix equation is found between the dipole parameters and the SWE coefficients of antenna radiation field.The least square estimation for dipole parameters is obtained based on an algorithm of singular value decomposition.The experiments for three types of antennas,including an horn,slotted wave guide,and patch array,are executed to verify the modeling accuracy of dipoles.The equivalent dipole models with a modeling error less than 1％for the three antennas is achieved,respectively.Also,the accuracy of predicting the radiation field of antennas at any observation distance using the equivalent dipole models is evaluated.The results demonstrate that the effectiveness of modeling antenna radiation field based on uniformly distributed dipoles.关键词
天线辐射场/建模/偶极子/球面波展开/奇异值分解(SVD)Key words
antenna radiation field/modeling/dipole/spherical wave expansion/singular value decomposition分类
信息技术与安全科学引用本文复制引用
李永晨,林嘉轩,廖意,王晓冰..基于均匀分布偶极子的天线辐射场建模方法[J].电波科学学报,2024,39(3):484-491,8.基金项目
国家自然科学基金(62001296) （62001296）
