机载天线极化失配及方向性的分析计算

Analysis of polarization mismatching and radiation pattern of aircraft antenna

针对无人机飞行姿态变化造成的收发天线极化失配情况,推导了收发天线间的极化失配因子。结合天线的方向特性综合考虑,计算了随着飞行姿态的变化,机载水平极化天线和垂直极化天线干扰地面天线时在不同方向的功率密度分布。计算结果表明,侧飞时水平极化天线和垂直极化天线将在不同的侧面获得增强的效果。

The polarization mismatching factor between transmitting and receiving antennas of a UAV caused from its change of flight attitude was deduced in this paper. By synthesizing the antenna＇s pattern and polarization mismatching factor, the power-density distributions of the horizontally and vertically polarized aircraft antennas were calculated with different attitude. The numerical results show that the rolling motion of the aircraft has a enhancement effect on opposite sides of the aircraft for both vertically and horizontally polarized antennas.