接地双层介质上平面螺旋天线的数值分析与实验结果

本文对接地双层介质结构上的阿基米德平面螺旋天线进行了研究。以接地双层结构上水平赫芝偶极子Ｓｏｍｍｅｒｆｅｌｄ型积分的格林函数为基础，用矩量法求解积分方程，从而确定出螺旋天线臂上的电流分布。用渐近法估计Ｓｏｍｍｅｒｆｅｌｄ积分得到远区电场的解析表达式，由此计算出输入阻抗、方向图、功率增益和轴比。这些参数值对于双层结构上印刷线天线的优化设计具有重要指导意义。实验结果证明了数值方法的正确性

Numerical Analysis and Experimental Results of Plannar Spiral Antenna Mounted on the grounded Double-layer

An Archimedean plannar spiral antenna mounted on the grounded double layer is investiged.Based on the substrate superstrate Green's function in terms of Sommerfeld type integrals for a horizontal Hertzian dipole on the superstrate,the current distribution along the spiral arm is determined by using an integral equation with the moment method,the input impedance,radiation pattem,axial ration and power gain are calculated on the basis of the obtained current distrbution,which is very important for optimum design of the printed wire antennas.Experimental results show that the numerical method is correct.