超宽带雷达实验系统中大功率纳秒级脉冲源的研制

Design of High-power Nanosecond Pulsers in UWB Radar Test System

分析了超宽带雷达试验系统对脉冲源信号的具体指标要求,提出超宽带雷达用脉冲源的指标规范。根据具体系统指标,选择全固态微波电路方案,研制出了系列的数千伏、纳秒级、超宽带雷达用脉冲源。基于微波PCB电路结构、利用雪崩三级管雪崩效应进行设计。为减小反射,提高脉冲波形指标,提出了新颖的欠电荷充电法。文中详细讲述了电路设计、重要电路结构以及投入超宽带雷达试验系统应用,目标探测试验相关结果。

The pulser’s indexes, needed in UWB radar test system, are analyzed and standardized. Based on the microwave PCB circuit, series of kilo-volt nanosecond UWB radar pulsers have been designed. They works on the avalanche effect of avalanche transistors. A novel method, called Deficit-charge Method, is brought forward, aiming to minimize the reflection and improve the pulser’s indexes. The design of the pulser is discussed in detail, including circuit design and important structure. Being used in the impulse radar test system, the circuit’s performance is excellent, and stable. Some system test results are also given.