【摘要】 基于调频广播的单站无源定位系统实际相当于收发分置的双基雷达,其直达波和地杂波的传播为小擦地角的低空传播,且影响威力范围的因素随基线长度的变化而有所不同。本文考虑低空传播,分析了不同基线长度时影响观测范围的主要因素,推导了对应情况下对高空飞行目标的观测面积的计算公式。结合上述公式以及对参考天线的要求可以得到最优的基线距离。仿真实验验证了上述的分析,并指出降低收发天线的高度可以进一步提高观测面积。更多还原

【Abstract】 The monostaic passive location systems are actually bistatic radar systems.The direct wave and the ground clutters propagate at low altitudes with small grazing angle, and affects the coverage varies with the length of base line. In this paper, different lengths of base line affect on the coverage are analyzed considering the propagation at low altitudes. The formula of calculating observation area is deduced, and the optimal length of base line is obtained on the basis of the formula and the requirement of reference antenna. The results of the simulation show that the observation area increases with lower transmitter and receiver antennas.更多还原