迭代法分析圆环类微带行波天线的辐射特性

Analyzing the Radiation Characteristic of Annular QuasiMicrostrip TravelingWave Antennas by Iterative Method

利用圆环类微带行波天线的辐射功率与等效行波磁流衰减常数之间的自洽关系 ,导出了计算衰减常数的迭代方程 ;为加快迭代速度 ,将辐射积分中的格林函数展开成柱面波函数 ,得到快速收敛的级数和 最后给出了方向图的计算曲线 ,与实验结果对比吻合良好 。

An integral equation about the attenuation constant of the equivalent travelingwave magnetic current is derived from the selfconsistency between the attenuation constant and the radiated power. To quicken iterative pace, the Green's function in the integral equation is unfolded by cylindrical functions, then the complex integral is changed into the sum of series convenient for iterative computation. Lastly, the calculated curve of the directional pattern is presented, which matches the experimental result well. That indicates it is very effective to simulate the radiation characteristic of the kind of antenna by this method.