一种双模式短波对数周期天线设计  

Design of a dual mode HF log-periodic antenna

作　　者：李虎[1] 任晓飞[1] 蔡志远[1] 袁英光[1] LI Hu;REN Xiaofei;CAI Zhiyuan;YUAN Yingguang(China Research Institute of Radiowave Propagation,Qingdao 266107,China)

机构地区：[1]中国电波传播研究所,青岛266107

出　　处：《电波科学学报》2022年第1期73-78,共6页Chinese Journal of Radio Science

基　　金：国家稳定支持项目(A131906W08)。

摘　　要：为了适应电离层传播特性,使短波天线更好地与电离层环境匹配,进行大纵深覆盖,设计了一种双模式短波对数周期天线.天线在垂直方向上由两层水平极化对数周期天线构成,通过同相和反相两种激励模式,使得天线能够同时形成低仰角辐射和高仰角辐射.理论仿真和实际测试表明:双模式短波对数周期天线在6~30 MHz频带内,两种模式的电压驻波比(voltage standing wave ratio, VSWR)均小于2.5;低角模式仰角为20°左右,增益可达12 dBi;高角模式仰角为44°~60°左右,增益可达10 dBi.该天线同时具备两种模式工作能力,有效改善了传统对数周期天线覆盖能力,并为短波信号多径分离研究奠定了基础.In order to adapt to the propagation characteristics of the ionosphere and make HF antenna better match the ionospheric environment, an HF log-periodic antenna working on dual-mode propagation is designed. The antenna is composed of two log-periodic antennas in the vertical direction. The low elevation mode and high elevation mode are produced in the proposed antenna by in-phase excitation and inverse excitation respectively. The simulation and test show that the voltage standing wave ratio(VSWR) of the proposed antenna is less than 2.5 in the range of 6-30 MHz. The elevation of the antenna is of 20° and the gain is of 12 dBi for low elevation mode;for another mode, the elevation varying from 44° to 60° and the gain of 10 dBi are obtained. The proposed antenna works on two modes,which effectively improves the coverage ability of the conventional HF log-periodic antenna. The design lays a foundation for the further research of multipath separation of high frequency signals.

关 键 词：对数周期天线 短波天线 多模传播 仰角 电离层 

分 类 号：TN828[电子电信—信息与通信工程]