基模螺旋天线的研究

本文提出了一种计算基模螺旋天线的新方法.该方法采用螺旋线段对基模螺旋天线进行划分,只需少量分段就可用矩量法对其进行精确模拟分析.文中求出了螺旋天线上的电流分布和远场方向图,与直线段模拟计算结果吻合良好.求阻抗矩阵 Z时,利用螺旋天线的对称性和周期性,只需求出一小部分元素就可得到Z 矩阵的其它元素的值.该方法分段数少,使得计算时间和计算所需存储量大大减小,计算速度和精度显著提高.

Research on Normal Mode Helical Antenna

In this paper,a new moment method using helical segments is presented to model Normal Mode Helical Antenna (NMHA).Using this method,the NMHA can be modeled by a few segments.The current distributions and radiation patterns of some NMHAs are calculated.A comparison is made between results obtained using this helical segment algorithm and the linear segment algorithm,and the results of the two algorithms agree fairly well.When calculating the impedance matrix Z,all the elements of the matrix can be obtained by only calculating a few elements with the application of the symmetric and periodic characteristics of the NMHA.Therefore,the CPU time and the memory storage are significantly reduced,with the accuracy and speed enhanced.