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入射波极化方向对毫米波天线罩瞄准误差的影响分析

Keywords: 毫米波,天线罩,瞄准误差,极化

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Abstract:

当不同极化方向的电磁波入射时,采用射线追迹方法计算了Ka波段线极化单脉冲天线-天线罩系统中天线罩所引入的瞄准误差.给出了天线在空域扫描时天线罩引入的瞄准误差分布图,并总结了其随入射波极化方向变化的规律.结果表明,入射波极化方向改变对天线罩引入的共面瞄准误差不产生影响,对交叉面瞄准误差影响较小,而对偏离方位轴和俯仰轴的扫描位置上的瞄准误差影响较大,且整个扫描空域的瞄准误差分布图随入射波极化方向的旋转而缓慢旋转变化.

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