一种应用于脉冲探地雷达前端的探测子系统  

Design of pulse ground-penetrating radar front-end detecting subsystem

作　　者：葛津津 周浩 凌天庆[1] Ge Jinjin;Zhou Hao;Ling Tianqing(Nanjing Research Institute of Electronics Technology,Nanjing 210039,China)

机构地区：[1]南京电子技术研究所,南京210039

出　　处：《电子测量技术》2022年第4期27-32,共6页Electronic Measurement Technology

摘　　要：高幅度窄脉冲时域脉冲信号源及超宽带低振铃时域脉冲天线是脉冲探地雷达(GPR)的关键部件。通过挖槽技术有效的减少了电磁辐射干扰,设计并研制了脉冲幅度为156.2V,脉冲宽度为1.6ns的MARX级联脉冲信号源。同时首次提出了半圆形天线臂电阻加载天线,相比于传统三角形天线臂电阻加载天线,0.5~7GHz带宽内驻波系数控制在3.5以内,天线时域脉冲的拖尾幅度由17.5%下降到8.3%,具有超宽带、低振铃的特点。最终开展了隐藏目标的探测实验,雷达探测结果成像清晰、浅层目标分辨率高,有力地验证了本文所研究的脉冲探地雷达前端探测子系统的优越性能及潜在的使用价值。High magnitude,narrow pulse time domain pulse signal sources and ultra-wide band,low later-time ring time domain pulse antennas are the important components of the pulse ground-penetrating radar.The electro-magnetic interference can be decreased by using ducking technology.High amplitude time domain pulse signal sources with 156.2 V pulse amplitude,1.6ns pulse width are designed.Besides this,a novel UWB time domain pulse antenna with semicircle arms has been proposed.Compared to the traditional bow-tie antenna with triangular arms,the VSWR of the UWB time domain pulse antenna is less than 3.5from 0.5~7GHz.And the later-time ring decreased from 17.5%to 8.3%.Lastly,an experiment for detecting the buried targets is carried out using the integrated radar system,the experiment demonstrated high resolution ratio especially for shallow targets.Superior performances and huge value of the pulse ground-penetrating radar front-end detecting subsystem designed in this thesis have been further verified.

关 键 词：脉冲探地雷达 脉冲信号源 半圆形天线臂 电阻加载 

分 类 号：TN957.2[电子电信—信号与信息处理]