一种宽带小型化的双圆极化天线设计  

A broadband and miniaturized dual circularly polarized antenna

作　　者：宋道军 齐照辉[2] 尹应增[3] SONG Daojun;QI Zhaohui;YIN Yingzeng(The Northern General Electronics Group Co.,Ltd.,Wuxi Jiangsu 214145,China;The Institute of Effectiveness Evaluation of Flying Vehicle,Beijing 100085,China;The National Key Laboratory of Antennas and Microwave Technology,Xidian University,Xi′an Shaanxi 710071,China)

机构地区：[1]北方通用电子集团有限公司,江苏无锡214145 [2]航天飞行器生存技术与效能评估实验室,北京100085 [3]西安电子科技大学天线与微波技术重点实验室,陕西西安710071

出　　处：《太赫兹科学与电子信息学报》2023年第10期1244-1246,1270,共4页Journal of Terahertz Science and Electronic Information Technology

摘　　要：设计了一种覆盖X频段的双圆极化天线,通过1个3 dB电桥分别给2个垂直交叉放置的Vivaldi天线馈电来实现双圆极化。为了实现宽带小型化,在Vivaldi天线表面开槽并且电桥采用耦合形式实现。仿真结果表明,所设计的天线整体尺寸为0.48λ×0.48λ×0.5λ(λ对应最低频率处波长),能够在8~12 GHz的频带内实现天线驻波比(VSWR)<2,轴比为3 dB,带宽为40%的左旋和右旋圆极化。A dual circularly polarized antenna covering X-band is designed.Two vertical Vivaldi antennas are fed by a 3 dB coupler to achieve dual circular polarization.In order to achieve broadband miniaturization,the Vivaldi antenna is slotted and a slot-coupled 3 dB coupler is adopted.The simulation results show that the overall size of the designed antenna is 0.48λ×0.48λ×0.5λ(λcorresponding to the wavelength at the lowest frequency);it can achieve Left-Handed and Right-Handed Circular Polarization(LHCP/RHCP)with Voltage Standing Wave Ratio(VSWR)<2 and 3 dB of Axial Ratio(AR),40%of bandwidth from 8 to 12 GHz.

关 键 词：双圆极化 宽带 小型化 宽波束 

分 类 号：TN929.5[电子电信—通信与信息系统]