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电子学报  2015 

基于修正最小二乘的虚拟端射阵列回波算法研究

DOI: 10.3969/j.issn.0372-2112.2015.10.035, PP. 2124-2128

Keywords: 端射天线,虚拟阵元,栅瓣抑制,修正最小二乘估计

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Abstract:

在端射天线组阵中,期望获得高增益低副瓣的组阵效果.但由于端射天线单元间的复杂互耦,小间距组阵时副瓣电平抬高得不到预期增益的提高,通过拉大单元间距可以抑制互耦、获得高增益,但又导致出现栅瓣电平.因此针对10振子平板端射天线单元大间距组阵并侧向内插虚拟阵元的情况,提出一种修正最小二乘估计回波算法,以此计算虚拟阵元的回波信号,并与实际阵列回波信号同相叠加来达到抑制栅瓣的目的.对比分析了虚拟端射天线阵列通过传统最小二乘估计和修正最小二乘估计计算所得的方向图,结果证明后者有效抑制了栅瓣并获得了更低的副瓣电平.

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