穿墙探测雷达中的脉冲产生技术研究  

Study of Impulse Generator in TWSR

作　　者：倪原[1] 郭玉萍[1] 杨辉[2] 

机构地区：[1]西安工业大学电子信息工程学院,西安710032 [2]西安邮电学院通信工程系,西安710061

出　　处：《西安工业大学学报》2009年第1期67-70,共4页Journal of Xi’an Technological University

基　　金：陕西省教育厅专项科技基金资助项目(05JK225)

摘　　要：穿墙探测雷达(Through-the-wall Surveillance Radar,TWSR)技术实现的关键之一是如何设计并产生超宽带脉冲.分析了TWSR主要参数选取方法,讨论了几种UWB中常用窄脉冲产生方法及其特点;分析设计了一种基于射频三级管的低电压雪崩特性的超宽带脉冲产生电路,并通过Multisim仿真调试,产生了峰值电压为1.4 V,宽度为616 ps的UWB双极性窄脉冲,其前沿类似于高斯脉冲一阶导函数波形,且波形较为理想,电路简单,易于实现.The key technology of through-the-wall surveillance radar （TWSR） lies on how to generate UWB pulse. This paper analyses the key method of radar preference of TWSR and the characteristics of several commonly used pulse generators in UWB. Based on Low-voltage characteristics of avalanche of RF-BJT,UWB bipolar short-duration pulse is designed and simulated by Multisim with satisfied results of amplitude of 1.4 V and pulse width of 252 ps. The pulse is similar to a Gaussian pulse of the first derivative of bipolar UWB pulse with more ideal waveform,and has the advantages of simple circuit and easy realization.

关 键 词：TWSR 超宽带 射频三级管 双极性窄脉冲 

分 类 号：TN959.7[电子电信—信号与信息处理]