一种UWB雷达脉冲信号发生器的设计

摘要

介绍了UWB雷达的人体生命探测系统的工作原理,比较了几种窄脉冲产生方法的优缺点,详细分析了雪崩三极管原理,利用雪崩三极管的雪崩特性实现了超宽带雷达窄脉冲的产生。通过研究分析典型的脉冲产生电路,给出了产生人体生命探测系统的脉冲信号发生器的电路,最后由实验仿真结果可得,电路可生成脉宽为皮秒级的双极性脉冲,脉冲的峰-峰值达2 V的窄脉冲信号,满足了微功率冲击雷达系统用于生命信号探测的要求。%This paper mainly introduces the operating principle of human life detection system using UWB radar,and compares several methods on ultra-short pulses generating.Taking into consideration the avalanche transistor principle,this paper comes up with using the avalanche characteristics of the avalanche transistor to achieve ultra-wideband radar ultra-short pulse generating principle.Through researching and analyzing the typical pulse generating circuit,this paper works out the pulse signal generator circuit on detection system of human life.Experimental simulation results show that：the circuit can generate a pico-second bipolar pulse and peak-up of the narrow pulse can reach up to 2 V.It can meet the micro power impulse radar system which can be applied in the field of life signal detection requirements.