太赫兹科学与电子信息学报2026，Vol.24Issue(4)：483-493,11.DOI:10.11805/TKYDA2025216
基于2-bit可重构太赫兹编码超表面的RCS缩减设计
Design of RCS reduction based on 2-bit reconfigurable terahertz coding metasurface
摘要
Abstract
Coding metasurfaces can flexibly manipulate electromagnetic waves,providing high degrees of freedom for employing coding sequences to control electromagnetic waves in the frequency domain.This paper adopts Dirac Semimetal(DSM)to design a three-layer reflective unit cell.Without altering the unit cell structure,the Fermi level(EF)of DSM is tuned by applying an external bias voltage,thereby achieving 2-bit coding at 1.90 THz with phase stability of±60°.To address electromagnetic waves under different incident angles,the far-field scattering theory is utilized,and the genetic algorithm is employed to specifically optimize the metasurface array.Taking incident elevation angles of 0°,15°,30°,45°,and 60° as examples,five arrays are designed,and the coding metasurface is modeled and analyzed.The results demonstrate that when electromagnetic waves are incident perpendicularly,Radar Cross Section(RCS)reduction exceeding 10 dB is achieved within the range of 1.77～2.47 THz,with a maximum value of 28.4 dB.When electromagnetic waves are incident at an elevation angle of 60°,RCS reduction exceeding 10 dB is realized within the range of 1.82～2.24 THz,reaching a maximum of 15.2 dB,thereby achieving broadband wide-angle RCS reduction.关键词
编码超表面/狄拉克半金属/太赫兹/遗传算法/RCS缩减Key words
coding metasurfaces/Dirac Semimetal(DSM)/terahertz/genetic algorithm/Radar Cross Section(RCS)reduction分类
数理科学引用本文复制引用
李韦霖,陈哲,杨晋骁,唐润风,李纾雨,李文卓,师健峰..基于2-bit可重构太赫兹编码超表面的RCS缩减设计[J].太赫兹科学与电子信息学报,2026,24(4):483-493,11.基金项目
国家自然科学基金资助项目(62461059) （62461059）
云南省高校服务重点产业科技资助项目(FWCY-ZNT2024003) （FWCY-ZNT2024003）
云南省基础研究计划资助项目(202301AT070249) （202301AT070249）
云南省"兴滇英才支持计划"资助项目(C619300A074) （C619300A074）
