机载UHF频段蛇型单极子宽带天线设计  

Design of airborne UHF band snake monopole broadband antenna

作　　者：商锋 徐鑫 王欣伟 SHANG Feng;XU Xin;WANG Xinwei(School of Electronic Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,China)

机构地区：[1]西安邮电大学电子工程学院,陕西西安710121

出　　处：《西安邮电大学学报》2022年第6期31-36,共6页Journal of Xi’an University of Posts and Telecommunications

摘　　要：设计了一种由天线辐射结构与宽带匹配网络组成的宽带小型化机载天线。天线基本结构是在单极子天线的基础上加载弯折线技术实现小型化,宽带匹配网络是由集总器件设计的匹配电路和带通滤波器构成,在机载特高频(Ultra High Frequency,UHF)频段实现宽带匹配。利用有限元法软件和矩量法软件进行仿真及优化,得到天线各项参数数值,制作实物并测试。测试结果表明,设计的天线阻抗带宽达到45 MHz,相对带宽达到10.29%。天线的方向图仿真结果为水平全向增益大于等于0 dBi,垂直方向3 dB波束宽度大于等于65°。满足机载天线的设计要求。A broadband miniaturized airborne antenna consisting of an antenna radiation structure and a broadband matching network is designed.Among them,the antenna infrastructure is based on the monopole antenna loaded with bending line technology to achieve miniaturization,and the broadband matching network is composed of matching circuits and bandpass filters designed by aggregate devices,thus achieving broadband matching in the ultra high frequency(UHF)band.Simulation and optimization are carried out by using finite element method software and the method of moments software to obtain the values of various parameters of the antenna,and the real object is made and tested.The test results show that the designed antenna impedance bandwidth reaches 45 MHz,and the relative bandwidth reaches 10.29%.The simulation result of the directional diagram of the antenna shows that the horizontal omnidirectional gain is greater than or equal to 0 dBi,and the vertical 3 dB beamwidth is greater than or equal to 65°.It meets the design requirements of airborne antenna.

关 键 词：机载天线 单极子天线 机载特高频频段 弯折线技术 宽带匹配 

分 类 号：TN822.4[电子电信—信息与通信工程]