超宽带低背腔车载探地雷达收发天线的研究  

Research on an UWB Transmitting /Receiving Antenna with Shallow Backed Cavity Mounted on a Vehicle for GPR Application

作　　者：李雪萍[1,2,3] 纪奕才[1] 卢伟[1] 方广有[1] 

机构地区：[1]中国科学院电磁辐射与探测技术重点实验室,北京100190 [2]中国科学院大学,北京100039 [3]河南师范大学物理与电子工程学院,河南新乡453007

出　　处：《电子学报》2014年第8期1577-1581,共5页Acta Electronica Sinica

摘　　要：本文研制了一种超宽带车载探地雷达收发天线系统,采用半椭圆形状的偶极子天线形式和电阻加载的方法展宽了天线的工作带宽,使天线末端的反射明显减小.分析了背腔高度对天线电性能的影响,在保证天线电性能的前提下,采用的背腔高度仅为22mm.设计并制作了一套天线样机,并安装在探测车上,在电波暗室中对天线的电性能进行了测试,测试结果与仿真结果吻合良好,这表明该超宽带收发天线可以满足车载探地雷达系统的需求.A Ground Penetrating Radar （GPR） UWB transmitting/receiving antenna system mounted on a vehicle for the exploration of the subsurface is investigated in this paper. A dipole antenna with two half-elliptical-shape arms which are loaded by continuous resistive elements can broaden the bandwidth and improve the impulse radiation. The influence of the height of backed cavity to the antenna electrical performance is analyzed. Taking fully into account the antenna radiation efficiency and the waveform fidelity, a backed cavity with height of 22mm is adopted. The antenna system is manufactured and mounted on a vehicle. Then it is measured in an anechoic chamber. The results of simulations and measurements are compared together and good agreements are achieved. The results show that the UWB transmitting/receiving antenna system is suitable for vehicle-mounted GPR applications.

关 键 词：探地雷达 半椭圆偶极子天线 电阻加载 车载 

分 类 号：TN957.2[电子电信—信号与信息处理]