电波科学学报2024，Vol.39Issue(2)：339-344,6.DOI:10.12265/j.cjors.2023037
基于三次样条插值法的柱面近场测量欠采样修正算法研究
Undersampled modified algorithm for cylindrical near-field measurement based on cubic spline interpolation
王安康 1王浩磊 1王树才1
作者信息
- 1. 中国电子科技集团公司第二十七研究所, 郑州 450047
- 折叠
摘要
Abstract
In order to solve the problem of low efficiency of near-field measurement in anechoic chamber,the efficient measurement methods in near-field antenna measurement are studied,and a cylindrical near-field under sampling recovery algorithm is proposed.The high-precision cubic spline interpolation(CSI)algorithm is used to recover the unsampled points,which can reduce the number of sampling points and improve the test speed.In addition,in the process of solving the cylindrical near-field under-sampled recovery CSI,the excellent characteristics of positive definiteness and symmetry of the coefficient matrix are fully utilized,so that the calculation amount of the linear equations is reduced from O(n3)to O(n),which greatly improves the calculation efficiency of cubic spline interpolation.Finally,the far-field pattern of the antenna is obtained by using the interpolated near-field amplitude and phase combined with the cylindrical near-field to far-field transformation theory.In order to verify the effectiveness of the proposed algorithm,the antenna prototype is tested,and the experimental results are consistent with the theoretical analysis.关键词
天线近场测量/柱面近场/欠采样/三次样条插值(CSI)/柱面近远场变换Key words
near-field antenna measurement/cylindrical near-field/under-sampled/cubic spline interpolation(CSI)/cylindrical near-field to far-field transformation分类
信息技术与安全科学引用本文复制引用
王安康,王浩磊,王树才..基于三次样条插值法的柱面近场测量欠采样修正算法研究[J].电波科学学报,2024,39(2):339-344,6.
