高效率计算光滑平台上远距离天线间互耦算法  

Efficient algorithm to compute the coupling between long-distance antennas mounted on a smooth platform

作　　者：刘宏伟 谢敏[2] 魏兵 袁浩波[3] LIU Hongwei;XIE Min;WEI Bing;YUAN Haobo(School of Physics and Optoelectronic Engineering,Xidian University,Xi’an 710071,China;Xi’an Electronic Engineering Research Institute,Xi’an 710100,China;School of Electronic Engineering,Xidian University,Xi’an 710071,China)

机构地区：[1]西安电子科技大学物理与光电工程学院,陕西西安710071 [2]西安电子工程研究所,陕西西安710100 [3]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《系统工程与电子技术》2022年第1期28-33,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(61901324);电波环境特性及模块化技术国防科技重点实验室基金(201903002);陕西省自然科学基础计划(2021JM-129)资助课题。

摘　　要：为了高效率地分析光滑平台上两天线间的互耦,提出了一种计算S参数的快速算法。该方法首先通过球谐变换(spherical harmonic transformation, SHT)展开单个天线的辐射场,然后采用一致性几何绕射理论(uniform theory of diffraction, UTD)分析平台的散射场,最后通过互易定理的反应积分得到两天线间的S参数。该方法只需要对每个天线单独进行一次测量或者仿真,此后当两个天线在平台上随意旋转时,都可以高效率地求出两者之间的互耦。数值实验的结果表明,所提方法与商业软件FEKO中的矩量法/UTD混合算法的精度相当,但是前者的速度比后者更快。In order to analyze the coupling between antennas mounted on a smooth platform efficiently, a fast algorithm is introduced to evaluate the S-parameters. Firstly, this algorithm proposes to expand the radiated fields of an antenna by spherical harmonic transform(SHT). Then, evaluate the field scattered by the platform with uniform theory of diffraction(UTD). Finally, the S-parameter between two antennas is computed with the reciprocity theorem. It requires measuring or simulating every antenna only once to compute the S-parameter between a couple of antennas efficiently, even if the two antennas are rotated arbitrarily. The numerical example shows that the proposed algorithm is almost as accurate as the method of moments/UTD hybrid method of FEKO, and the former is faster than the latter.

关 键 词：S参数 互易定理 球谐变换 一致性几何绕射理论 

分 类 号：TN82[电子电信—信息与通信工程] O441[理学—电磁学]