具有分形单元的分形线阵天线及其分析

本文将分形单元按照对应八木天线间距排列组成分形八木天线阵列,将分形单元按照对应对数周期天线间距排列组成分形对数周期天线阵列,并采用矩量法对其进行分析.计算结果表明分形八木天线比一般八木天线谐振频率降低,分形对数周期阵列天线比一般对数周期天线具有更宽的传输带宽,而方向图和增益变化随频率的变化特性同一般对数周期天线基本一致.

FRACTAL ANTENNA ARRAY WITH FRACTAL ELEMENT AND ITS FULL WAVE ANALYSIS

Two kinds of fractal antenna arrays FYAGI and FLPDA were proposed. These two kinds of arrays are both made up of fractal element antenna(FEA), but with the same space distance as their corresponding YAGI and logarithmic periadic dipole arrays in the Euclidean domain. The method of moments(MoM) performs the task of evaluating each of the antennas. The result shows that the resonant frequency of the FYGAI is lower than that of the regular YAGI antenna, whilst the bandwidth of the FLPDA is wider than that of the regular LPDA. The patterns and gains of the FYAGI and FLPDA are almost the same as those of their corresponding YAGI and LPDA antennas on their resonant frequencies.