一种低剖面四臂螺旋天线的设计  

Design of a low profile four-arm Spiral Antenna

作　　者：李春晓[1] 李良刚 徐良[1] 张辉[1] Li Chunxiao;Li Lianggang;Xu Liang;Zhang Hui(Xidian University,710000)

机构地区：[1]西安电子科技大学,710000

出　　处：《测控与通信》2019年第4期38-41,58,共5页

摘　　要：随着天通移动卫星通信业务的普及,S波段卫星通讯天线成为研究的热点。本文提出了1种基于特殊结构的低剖面四臂螺旋天线。通过将天线的馈电端、末尾进行弯折和介质加栽,使天线剖面高度大大降低。天线最终高度仅为16 mm,远低于传统的S频段四臂螺旋天线。基于此特殊结构的四臂螺旋天线能够在1.96~2.20 GHz实现VSWR<2(相对带宽为11.5%)。天线半功率波束宽度达到±50°,波束宽度内轴比均小于1.5dB,天线增益达到1.5dBi。With the popularization of S-band satellite communication service,S-band antenna has become a research hotspot.In this paper,a low profile four-arm spiral antenna based on special structure is proposed.By bending the antenna and dielectric loaded technique,the height of the antenna profile is greatly reduced.The final height of the antenna is only 16 mm,which is much lower than that of the traditional S-band four-arm spiral antenna.The four-arm spiral antenna based on this special structure can achieve VSWR<2(relative bandwidth of 11.5%)at 1.96 GHz to 2.20 GHz.The HPBW of the antenna is±50°,the internal axial ratio of the beam width is less than 1.5 dB,and the antenna gain is achieved 1.5 dBi.

关 键 词：低剖面 圆极化 宽波束 介质加栽 

分 类 号：TN8[电子电信—信息与通信工程]