末端开槽超宽带天线的研究  

Analysis on multi-slot tuned ultra-wideband antenna

作　　者：王友成[1,2] 邵金进[1,2] 纪奕才[2] 方广有[2] 张晓娟[2] 

机构地区：[1]中国科学院大学,北京100190 [2]中国科学院电子学研究所电磁辐射与探测技术重点实验室,北京100190

出　　处：《电波科学学报》2015年第3期510-516,共7页Chinese Journal of Radio Science

基　　金：国家863计划(2012AA061403)

摘　　要：基于常规平面半椭圆偶极天线形式,研究了末端开槽天线的特性,分析了四种不同的末端开槽方式对天线驻波系数、端口阻抗、群延时等特性的影响.在仿真分析比较了天线末端采用半圆面开槽、电阻加载的方式、开槽单元数量以及背腔形式对天线特性影响的基础上,设计了一种中心频率为400 MHz的平面半椭圆、末端双半圆面开槽加载以及V形金属背腔的新型超宽带天线,加工制作并测试了该天线.测试结果表明:该天线阻抗带宽优于两个倍频程,波形保真度高;同时该天线成本低廉易于集成,能够应用于穿墙成像雷达.Characteristics of ultra-wide band(UWB)antenna are studied with end slottuned.Based on traditional half-ellipse planar antenna,the impacts of four different tuned slots etched on the antenna end including half ellipse,triangle planar,rectangle planar and sine planar on some antenna characteristics,such as voltage standing wave ratio(VSWR),input impedance,group delay are analyzed.By simulation and analysis,semicircle slot-tuned and resistive-loaded is chosen,and the influence of the number of tuned slots and the distinctive shape of the cavity on antenna performance is analyzed.One novel half-ellipse planar antenna with two half-circle tuned slots and a V-shape cavity operating at a 400 MHz center frequency is designed.This antenna is manufactured and measured.Test results show that the proposed antenna has a large impedance band up to two octaves,high fidelity on time domain waveform.Additionally,this antenna costs low and can be applied in through-wall life detecting radar easily.

关 键 词：超宽带天线 末端开槽 时域特性 加载 

分 类 号：TN822.8[电子电信—信息与通信工程]