电子学报2024，Vol.52Issue(5)：1442-1449,8.DOI:10.12263/DZXB.20220757
基于槽线的圆极化漏波天线研究
Research on Circularly Polarized Leaky-Wave Antenna Based on Slotline
摘要
Abstract
In this article,a circularly polarized leaky-wave antenna with beam-scanning from backward to forward is proposed based on the slotline structure.Each leaky-wave unit cell consists of a slotline and four short-ended slots loaded on the two strips.To realize the property of backward-to-forward beam scanning,the length of each short-ended slot is about half of the guided wavelength at the broadside frequency.By designing the location of the short-ended slots as well as the angle between the short-ended slot and the propagation direction of the guided wave,the circularly polarized ability is obtained.As a validation of the proposed circularly polarized leaky-wave antenna,a prototype with broadside frequency of 10 GHz is designed and fabricated.Both the simulated results and the measured results show that this antenna exhibits good properties of circular polarization and beam scanning.The measured results suggest that this antenna exhibits left-handed circular polarization in the upper-half space above the antenna plane,and scans from-27° to+25° with gain varia-tion of 7.0 to 10.9 dBic as the frequency varies from 9 GHz to 11 GHz.Symmetrically,this antenna features right-handed circular polarization in the lower-half space below the antenna plane,with beam scanning from-153° through±180° to+155°and gain variation of 8.4～12.3 dBic.Compared with the reported antennas,the proposed circularly polarized leaky-wave antenna features a simple configuration.Meanwhile,the proposed design based on the short-ended slot achieves a low transmission coefficient in the working band.关键词
圆极化天线/漏波天线/周期结构/连续波束扫描/槽线Key words
circularly polarized antenna/leaky-wave antenna/periodic structure/seamless beam scanning/slotline分类
信息技术与安全科学引用本文复制引用
王亨辉,孙胜..基于槽线的圆极化漏波天线研究[J].电子学报,2024,52(5):1442-1449,8.基金项目
国家自然科学基金(No.61971115,No.61721001) National Natural Science Foundation of China(No.61971115,No.61721001) （No.61971115,No.61721001）
