强激光与粒子束2026，Vol.38Issue(4)：64-72,9.DOI:10.11884/HPLPB202638.250297
低剖面宽波束圆极化天线单元及其宽角扫描阵列设计
Design of low-profile circularly polarized antenna element for wide-angle scanning array
摘要
Abstract
[Background]With the rapid development of low-Earth orbit(LEO)satellite communications,there is a pressing need for circularly polarized phased arrays that offer wide-angle scanning capability while maintaining a low profile,which remains a significant challenge in current designs.[Purpose]This study aims to design a low-profile,wide-beam circularly polarized antenna element and its corresponding wide-angle scanning array to address the limitations of narrow scan angles and high profiles in existing solutions.[Methods]A double-layer antenna element was designed,utilizing corner perturbation and cross-slots to achieve left-hand circular polarization,while the beamwidth was broadened via an upper parasitic structure and metallic posts based on pattern superposition.A 4×4 array was constructed by rotating these elements,with annular open slots integrated into the ground plane to suppress mutual coupling.[Results]The proposed antenna element exhibits a 3-dB axial ratio beamwidth greater than 175°,a gain beamwidth of 120°,and a profile of only 0.07λ0.Simulations of the 4×4 array demonstrate a scan coverage of±60°,with axial ratio consistently below 2 dB and a stable gain fluctuation of 3.38 dB throughout the scanning range.[Conclusions]The designed antenna and array effectively achieve wide-angle circularly polarized scanning with low profile and stable performance,offering a promising solution for LEO satellite communication terminals and other integrated systems requiring wide spatial coverage.关键词
低剖面/宽波束/宽轴比波束/宽角扫描/圆极化Key words
low-profile/wide beam/wide axial-ratio beam/wide-angle scanning/circular polarization分类
信息技术与安全科学引用本文复制引用
刘佳鑫,郭乙颗,李方位,郭庆功..低剖面宽波束圆极化天线单元及其宽角扫描阵列设计[J].强激光与粒子束,2026,38(4):64-72,9.基金项目
国家自然科学基金项目(62171301) （62171301）
