宽带小型化超短波刀型天线设计  

Design of Miniaturized Broadband VHF Blade Antenna

作　　者：曹永恒[1] 李文华 CAO Yongheng;LI Wenhua(Marine Design&Research Institute of China,Shanghai 200011;Xidian University,Xi'an 710071)

机构地区：[1]中国船舶及海洋工程设计研究院,上海200011 [2]西安电子科技大学,西安710071

出　　处：《舰船电子工程》2021年第6期65-69,共5页Ship Electronic Engineering

摘　　要：论文设计了一种宽频带、小型化的超短波刀型天线。首先,采用开引流缝隙的方法,不仅能有效拓展天线的阻抗带宽,还能实现天线的小型化(0.11λ×0.08λ);其次,通过引入断流缝隙,实现了天线输入阻抗虚部的容性化,便于集总元件的加载。最后,设计了一款适用于该天线的宽带匹配网络,实现了天线在30MHz~88MHz的全频段匹配。仿真结果表明天线在30MHz~88MHz频带驻波比小于3.5,水平方向增益在-10dBi左右,且具有良好的水平面全向辐射特性。为了验证设计的准确性,加工了超短波天线缩比模型进行测试,仿真与实测结果吻合良好。In this paper,a miniaturized,broadband very high frequency(VHF)blade antenna is designed.Firstly,the minia⁃turization of the antenna(0.11λ×0.08λ)can be achieved by slotting current guiding gaps,which can also expand the bandwidth of the proposed antenna.Then,an inverted-U shaped slot located on the bottom of the antenna is introduced to achieve capacitive in⁃put impedance,which is convenient to load the lumped element.Finally,a broadband matching network is designed to realize the broadband matching of the full band.The simulation results show that the antenna has a voltage standing wave ratio(VSWR)of less than 3.5 in 30MHz~88MHz,and the horizontal gain is around-10dBi,and it has good horizontal omnidirectional radiation charac⁃teristics.A shrinkage model of VHF antenna is fabricated for validation.The numerical simulation results have a good agreement with the measured results.

关 键 词：宽带 小型化 超短波天线 缩比模型 

分 类 号：TN821[电子电信—信息与通信工程]