电波科学学报2024，Vol.39Issue(6)：1089-1094,6.DOI:10.12265/j.cjors.2023317
一种紧凑型宽波束同轴馈电定向圆极化天线
A compact coaxial-fed unidirectional circularly polarized antenna with wide beamwidth
摘要
Abstract
A new compact coaxial-fed unidirectional circularly polarized antenna with wide beamwidth is presented in this paper.Firstly,multiple metal segments and helical wires are connected in series to form an antenna radiator.Secondly,a meandered ground with a cylindrical side wall is used for miniaturization.The length of metal segments and helical wires are designed to the half-wavelength length through controlling the parameters.By carefully selecting the turns of the helical wires,the antenna obtains unidirectional circularly polarized radiation characteristics.Finally,a 50 Ω coaxial line is utilized to feed the antenna and the ground size is optimized for a best performance.A prototype is fabricated and tested.Measured results show that the antenna obtains a matching bandwidth of 17.04%from 2.2 to 2.61 GHz(|S11|<-10 dB)and an axial ratio bandwidth of 28.11%from 2.14 to 2.84 GHz(AR<3 dB).Thus,the antenna has an overlapped bandwidth of 17.04%with a peak realized gain of 6.1 dB.This proposed antenna has the characteristic of a wide horizontal beamwidth,a simpler structure,and more convenient processing and practical applications.关键词
定向天线/圆极化/宽波束/同轴馈电/紧凑型Key words
unidirectional antenna/circular polarization/wide beamwidth/coaxial-fed/compact分类
信息技术与安全科学引用本文复制引用
董岩,王博,邓世俊,欧恒武,胡振欣..一种紧凑型宽波束同轴馈电定向圆极化天线[J].电波科学学报,2024,39(6):1089-1094,6.基金项目
国家自然科学基金青年基金(61901125) （61901125）
广州市基础与应用基础研究资助项目(202201010286) （202201010286）
