抗干扰阵列天线的小型化及波束形成技术分析

Analysis of the miniaturization of the anti-jamming array antenna and its beamforming technology

在抗干扰阵列天线小型化的基础上,提出了一种波束形成的新技术.在实际设计中,通过减小阵列天线单元之间的间距实现了阵列天线的小型化;编制高频结构仿真VBScript脚本程序来提取阵元的有源方向图和有源阻抗数据;在Matlab中编写了基于差分进化算法的优化设计程序;通过Matlab来调用高频结构仿真进行全波仿真分析,得出最优的阵元加权因子以实现抗干扰阵列天线的波束零陷.研究结果表明,该技术能够非常精准地在干扰方向(30°,10°)上形成零陷,且零陷深度提高了32dB.

Based on the miniaturization of the anti jamming array antenna, a new technique for beamforming is proposed. In the actual design, the array antenna is miniaturized by reducing the spacing between array antenna elements; the HFSS VBScript script is programmed to extract the active pattern and active impedance data of array elements; the optimization based on the differential evolution algorithm is written in Matlab; HFSS is called by Matlab for full wave simulation analysis, and the optimal clement weighting factors arc obtained to achieve the pattern null of the anti jamming array antenna. Research results show that this technique can form pattern null in the interference direction （30°, 10°）very accurately, and that the null depth increases by 32 dB.