交叉波束相干功率合成交叉角影响分析

摘要

Based on the concept and the principle of power synthesis from sparse array,the relationship between the cross angle of beams and the synthesis efficiency of the aimed point in the cross beams from two antenna nodes is derived.The energy distribution of the useful points under the different cross angles is simulated. If the distances between the antenna nodes and the aimed point are unique,the synthesis efficiency relies on the cross angles of the beams.And the shape and the density of the useful points accumulation area also rely on the cross angles of the beams.The results could be the theoretical basis for the further analysis of the space power synthesis of multi-source sparse array.%从稀疏阵列相干信号功率合成的概念及原理出发，推导分析了两点源交叉波束下波束之间交叉角度与目标点合成效率之间的关系，通过仿真分析了波束交叉角对有效功率点分布的影响。由分析可知，在多点源与目标点等距、各点源频率相同和极化方向一致的情况下，目标点合成效率与空间中各点源之间的夹角有关，交叉角度越接近垂直，目标点合成效率越低。当波束交叉时，有效功率点之间的间距与波束交叉角度有关，交叉角度越接近垂直，有效功率点之间的间距越小，有效功率点分布越密集。分析结果可为进一步分析多点源稀疏阵列空间功率合成提供理论依据。