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借助计算机仿真的方法,分析了目标信号从不同空间角度入射时,对弹载均匀圆形阵列天线测向角度分辨力的影响。仿真结果表明,对圆形阵列天线而言,分辨力受入射信号仰角的影响较大,而受方位角的影响较小。这可解释为信号能量分量影响了估计性能,其中仰角决定信号能量在阵列平面和阵列法线面的投影,方位角因阵列结构对称性使得各向估计精度差异不大。
With the method of computer simulation, the influence of the target signal on the azimuthal angle resolution of a uniform circular array antenna when it is incident from different spatial angles is analyzed. Simulation results show that for circular array antennas, the resolution is greatly affected by the elevation angle of the incident signal and less affected by the azimuth angle. This can be explained by the fact that the signal energy component affects the estimation performance. The elevation angle determines the projection of the signal energy on the plane of the array and the normal surface of the array. The azimuths have little difference in the estimation accuracy due to the array structure symmetry.