一种小型化超宽带共形天线设计  

Design of a Miniaturized Ultra-Wideband Conformal Antenna

作　　者：宋道军 张潇元 王坤[2] SONG Daojun;ZHANG Xiaoyuan;WANG Kun(North General Electronics Group Co.,Ltd.,Wuxi 214145,Jiangsu;Unit 93145 of PLA,Wuxi 300000,Jiangsu)

机构地区：[1]北方通用电子集团有限公司,江苏无锡214145 [2]中国人民解放军93145部队,江苏无锡300000

出　　处：《火控雷达技术》2024年第4期106-111,共6页Fire Control Radar Technology

摘　　要：本文设计了一款适用于5~6GHz频段的小型化超宽带共形天线,采用圆锥共形布局以适应弹头不规则性并满足性能需求。天线安装在载体顶部空心圆锥内,通过微带渐变巴伦和在螺旋天线底部设计1/4圈的渐削过渡段实现超宽带特性。测试显示,天线在5~6GHz频段的驻波比小于2.5,轴比在±5°、±35°轴向夹角下均低于3dB,满足圆极化条件。天线在-5°~5°和-35°~35°波束角范围内增益超过1dB,后向增益控制在0dB以下,确保了良好的幅度一致性和抗干扰能力,适合弹载应用。This paper presents the design of a miniaturized ultra-wideband conformal antenna suitable for the 5~6GHz frequency band.The antenna adopts a conical conformal layout to adapt to the irregular missile head and meet matching performance requirements.The antenna is installed inside a hollow conical structure on the top of the carrier.Its ultra-wideband characteristics are achieved through a microstrip gradient balun and a tapered transition section occupying 1/4 circle of the bottom of the spiral antenna.Test results show that the antenna has a standing wave ratio of less than 2.5 in the 5~6GHz frequency band,and the axial ratio is below 3dB at±5°and±35°axial offsets from the maximum radiation direction,meeting the requirements for circular polarization.The antenna has a gain of more than 1dB in the beam angle range of-5°to 5°and-35°to 35°,with the rearward gain below 0dB,ensuring good amplitude consistency and anti-jamming capability.Therefore,the proposed antenna is suitable for missile-borne applications.

关 键 词：螺旋天线 超宽带 圆极化 小型化 

分 类 号：TN95[电子电信—信号与信息处理] TN97[电子电信—信息与通信工程]