摘 要：为了解决仅相位加权的天线波束赋形问题，文章提出一种基于快速傅立叶变换的方向图综合算法。在仅相位加权的约束条件下，应用一维傅立叶逆变换获得方向图并与期望方向图进行对比，将方向图进行调整后再使用快速傅立叶变换获得阵元对应的幅相激励，并对阵元中的幅度激励进行约束。结果显示，该相位加权的工作形式，可有效降低系统中馈电网络的复杂度。
关键词：仅相位加权；可重构天线；波束赋形；快速傅立叶变换
DOI:10.19850/j.cnki.2096-4706.2021.14.013
基金项目：国家自然科学基金（62071220， 51808266）
中图分类号：TN820 文献标识码：A 文章编号：2096-4706（2021）14-0046-03
Optimization Method of Phase Only Weighted Array Antenna Beam forming Based on FFT
WANG Chen1 , QIU Minghua 2 , BAI Yechao3 , CHEN Yan4
(1.School of Computer and Software, Nanjing Vocational University ofIndustry Technology, Nanjing 210023, China; 2.The 8th Research Institute of CSIC, Nanjing 211153, China; 3.School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China; 4.Institute of Public Security, Jiangsu Academy of Safety Science and Technology, Nanjing 241002, China)
Abstract: In order to solve the problem of antenna beam forming with only phase weighting, a pattern synthesis algorithm based on fast Fourier transform is proposed in this paper. Under the constraint of only phase weighting, the pattern is obtained by one-dimensional inverse Fourier transform and compared with the expected pattern. After adjusting the pattern, the amplitude and phase excitation corresponding to the array element is obtained by fast Fourier transform, and the amplitude excitation in the array element is constrained. The results show that the phase weighted working form can effectively reduce the complexity of the feed network in the system.
Keywords: phase-only control; reconfigurable antenna; beam forming; fast Fourier transform
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作者简介：王辰（1988.02—），男，汉族，辽宁抚顺人，讲师， 硕士，研究方向：人工智能与移动信息化。