带罩天线远场仿真中有效等效源的确定  

Determination of Effective Equivalent Source for Far-fields Simulation of Antenna in Presence of Radome

作　　者：张春波[1] 郭东明[1] 盛贤君[2] 柳敏静[1] 孙玉文[1] 

机构地区：[1]大连理工大学精密与特种加工教育部重点实验室,大连116024 [2]大连理工大学电气工程与应用电子技术系,大连116024

出　　处：《系统仿真学报》2009年第2期364-366,共3页Journal of System Simulation

基　　金：国家杰出青年科学基金(50325518);国家重点基础研究发展计划973项目(2005CB724104);中国博士后科学基金(20060400966)

摘　　要：采用平面波谱-表面积分法或口径积分-表面积分法计算带罩天线远场特性时,都需要把天线罩表面作为等效辐射源,等效源的确定直接影响到算法的精度和效率。通过对天线近场分布特性的分析,提出一种通用于多种外形天线罩的确定有效等效源的实用方法:在采用三次样条函数理论,为多种流线形天线罩建立具有统一数学表达式的天线罩外形方程的基础上,建立以天线口径中心为顶点的天线辐射锥面,把包含在锥面内部的罩体表面作为有效等效源。仿真结果与试验结果相比较,表明该等效源确定方法的正确性。In the process of simulating the far-fields of the antenna in presence of a radome by the plane wave spectrum- surface integration （PWS-SI） or the aperture integration-surface integration （AI-SI） method, the determination of the equivalent source which is surface of the radome directly influences the precision and efficiency of the algorithm. Based on the analysis of the near-fields, a novel algorithm to determine the effective equivalent source was proposed, which combined the radome contour trace described by cubic spline functions and the radiating cone in front of the antenna. The algorithm could be employed in far-fields analysis of all kinds of antenna. The validity of the algorithm has been proven by the experiment.

关 键 词：天线罩 有效等效源 平面波谱-表面积分法 口径积分-表面积分法 三次样条函数 

分 类 号：TN820.81[电子电信—信息与通信工程]