加载螺旋天线的优化设计  

Optimal design of loaded helical antennas

作　　者：纪奕才[1] 贺秀莲[1] 刘其中[1] 田步宁[1] 

机构地区：[1]西安电子科技大学天线与电磁散射研究所,陕西西安710071

出　　处：《西安电子科技大学学报》2002年第6期721-724,780,共5页Journal of Xidian University

基　　金：国家部委预研项目资助(41001020204;40106030502)

摘　　要：采用螺旋式结构以及加载的方法可以使天线小型化和宽带化.研究了遗传算法和矩量法相结合的方法来快速优化设计宽带小型化加载法向模螺旋天线.采用基于曲线基函数和检验函数的矩量法来快速精确分析法向模螺旋天线,然后结合遗传算法对加载法向模螺旋天线上的加载集总元件的值、加载位置以及匹配网络参数进行一体化优化设计,并采用Sherman Morrison Woodbury公式来快速求解加载元件值和加载位置改变后的阻抗矩阵方程,提高了优化设计的效率.The helical structure and loading can be used to reduce the height and increase the bandwidth of antennas. A design procedure was presented to integrate the genetic algorithm with the method of moments for the fast optimal design of broadband miniature loaded normal mode helical antennas. The method moment with curved basis and testing functions is used to analyze the normal mode helical antennas. Then the genetic algorithm is applied to the synthesis of normal mode helical antennas loaded with lumped components. The loading circuit parameters, locations of the loads along the antenna, and matching network parameters are optimized simultaneously. The Sherman-Morrison-Woodbury formula is applied for the last calculation of the impedance matrix equation when the loading configurations are changed, greatly raising the optimization efficiency.

关 键 词：螺旋天线 优化设计 法向模 矩量法 遗传算法 保密通信 移动通信 

分 类 号：TN823.31[电子电信—信息与通信工程]