For the development of UWB pulse signal generator,and based on the analysis of the characteristics of UWB pulse waveform,a system model of the UWB pulse generating circuit taking oscillation source,energy⁃storage elements and high⁃speed switch as the main body is proposed by regarding the first⁃order Gaussian pulse as the design objective. The different im⁃plementation measures were designed in actual circuit. The complex CPLD is adopted to design the pulse sequential trigger cir⁃cuit for the UWB pulse generating module. A UWB pulse generating circuit was designed by avalanche transistors,and the nar⁃row pulse within 1 ns was obtained by actual testing. A UWB pulse generating circuit based on step recovery diodes (SRD) was designed,and the UWB pulse signal whose width is approximate 400 ps was obtained in PSpice simulation. The simulation re⁃sults show that the established SRD model accords with the theoretical analysis,and the designed UWB pulse signal generating circuit can completely meet the use of UWB fuze.%在UWB脉冲信号发生器的研制中，通过分析UWB脉冲波形的特征，以一阶高斯脉冲为设计目标，提出了一种以振荡源、储能元件和高速开关为主体的UWB脉冲产生电路系统模型，并且在实际电路中设计了不同的实现方式。利用复杂可编程器件（CPLD）为UWB脉冲发生模块设计了脉冲时序触发电路。针对脉冲的产生方案，设计了一种利用雪崩晶体管产生UWB脉冲的电路，实际测试得到了1 ns以内的窄脉冲；与此同时设计了一种基于阶跃恢复二极管的UWB脉冲发生电路，在PSpice中仿真得到了宽度约400 ps的UWB脉冲信号。仿真结果表明，PSpice建立的SRD模型符合理论分析，设计的UWB脉冲信号发生电路也完全满足在超宽带引信上使用的需求。
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