Abstract: Finite element and boundary integral equation method (FE-BI) is adopted to analyze the influence of structure parameters on dielectric conical log-spiral (CLS) antennas. Firstly the authors compare the radiation performance of dielectric conical log-spiral antennas to ordinary conical spiral antennas with the same structure and frequency. Then the influence of pitch angle and cone angle on dielectric conical antennas are discussed respectively. Structure parameters with best radiation performance are finally obtained based on numerical simulations under given medium parameters.

Key words: FE-BI method, dielectric cone, conical log-spiral antenna, electromagnetic radiation

摘要： 采用有限元-边界积分方程方法(FE-BI)分析了不同结构参量对介质体上的圆锥对数螺旋天线性能的影响。首先对比了同样结构和工作频率下介质圆锥对数螺旋天线与普通圆锥螺旋天线方向图的差异, 然后分析了圆锥参量和螺旋参量对介质圆锥天线的影响, 最后在给定的介质参量下, 仿真得出辐射特性较好的螺旋天线结构参量。

关键词: 有限元-边界积分方程法, 介质圆锥, 圆锥对数螺旋天线, 电磁辐射