无线电通信技术2024，Vol.50Issue(2)：392-398,7.DOI:10.3969/j.issn.1003-3114.2024.02.022
基于2bit超表面的单阶谐波波束扫描
Single-order Harmonic Beam Scanning Based on 2 bit Metasurface
符道临 1于瑞涛 2胡源 3刘曦 3熊伟2
作者信息
- 1. 江苏赛博空间科学技术有限公司,江苏南京 211113
- 2. 杭州市钱塘区信息高等研究院,浙江杭州 310018
- 3. 西安电子科技大学电子工程学院,陕西西安 710071
- 折叠
摘要
Abstract
Beam scanning is a technology widely used in wireless communication,radar,satellite communication and other fields.It allows wireless signals or ray beams to be oriented,focused in space.The smart metasurface space-time coding method proposed in re-cent years has expanded the degrees of freedom of metasurfaces in physical dimension,so that it can complete beam scanning at multiple frequencies under single-tone excitation.Howerver it still faces a series of problems such as low gain and large beam sidelobe.To solve this problem,a metasurface-based harmonic beam scanning method is proposed in this paper.Firstly,a 2 bit matesurface unit which can achieve 60° oblique incidence angle in the E plane is designed and processed,and a 32×32 array is formed.Secondly,an accurate 3 bit phase quantization is made for the unit harmonic state.Finally,by using the multi-objective genetic algorithm to optimize the different initial reference phases,the beam sidelobe of the positive first-order harmonics is reduced to the level of-15 dB,and the 60° beam scan-ning of the space-time coding metasurface on the E-plane is completed.This scheme provides a sufficient and powerful scheme for future time-space coding harmonic beamforming on metasurface.关键词
超表面/时空编码/波束扫描/副瓣压低/多目标遗传算法Key words
metasurface/time-space coding/beam scanning/sublobe depression/multi-objective genetic algorithm分类
信息技术与安全科学引用本文复制引用
符道临,于瑞涛,胡源,刘曦,熊伟..基于2bit超表面的单阶谐波波束扫描[J].无线电通信技术,2024,50(2):392-398,7.
