测试技术学报2026，Vol.40Issue(1)：124-132,9.DOI:10.62756/csjs.1671-7449.2026029
基于特征模分析的宽带圆极化超表面缝隙耦合天线
Broadband Circularly Polarised Metasurface Slit-Coupled Antenna Based on Characteristic Mode Analysis
摘要
Abstract
Based on the characteristic mode theory,a low-profile metastructure circularly polarized broad-band slot-coupled microstrip antenna is proposed.The metasurface is composed of a 4×4 cut angle metal patch,the antenna is fed by gap coupling,and the floor gap consists of a double trapezoidal connection.Based on the theory of characteristic mode,the function of degeneracy mode of square radiating patch is analyzed,and the degeneracy mode is separated effectively,which provides the mode basis for realizing circular polarization broadband performance.The size of the antenna is 0.67λ×0.67λ×0.043λ,where λ is the free-space wavelength at 5.0 GHz.The simulation results show that the-10 dB impedance band-width is 29.8％for frequencies from 4.33 GHz to 5.82 GHz and the 3 dB axial ratio bandwidth is 17.8％for frequencies from 4.93 GHz to 5.82 GHz.This antenna achieves good circularly polarised broadband performance and has excellent application prospects in areas such as satellite communications.关键词
特征模式/圆极化/宽带/超表面Key words
characteristic pattern/circular polarization/wideband/metasurface分类
信息技术与安全科学引用本文复制引用
郑学梅,桂傲..基于特征模分析的宽带圆极化超表面缝隙耦合天线[J].测试技术学报,2026,40(1):124-132,9.基金项目
国家自然科学基金资助项目(61803356) （61803356）
东北电力大学博士科研启动基金资助项目(BSIXM-2021207) （BSIXM-2021207）
