用于超宽带引信目标回波模拟的窄脉冲电路设计

Design of Impulse Generation Circuit for Ultra-wideband Fuze Target Return Simulation

超宽带引信目标回波模拟器是对超宽带引信进行成批、快速测试的有效手段,而超宽带窄脉冲产生电路的设计是其关键技术之一。目前的窄脉冲产生电路多是针对高斯脉冲或者双极高斯脉冲所设计,不能直接用于回波模拟器窄脉冲的产生。在球形目标回波假设的前提下,提出了一种使用阶跃恢复二极管(SRD)和超宽带滤波器联合设计产生二阶高斯脉冲信号对引信回波进行模拟的方法。通过仿真确定了SRD电路参数、超宽带滤波器的性能指标及其尺寸,根据仿真结果实现了窄脉冲产生电路。测量结果表明,所产生的窄脉冲信号波形与理论波形基本一致。

Ultra-Wideband （UWB） fuze return signals simulator is an effective way for efficient and quick testing of UWB fuzes. The circuit for UWB impulse generation is one key element of the simulator. Current impulse generators are mainly designed for Gaussian pulse or Gaussian doublet,which cannot be used in the simulator directly. Based on sphere target assumption,the current research presented a circuit that can generate second order Gaussian impulse for fuse return signal simulator,using step recovery diode and UWB filter co-design. Parameters of SRD circuit and UWB filter were determined by simulation. According to simulation results,a impulse circuit was fabricated and measured. The measured results coincide with theoretical second order Gaussian signal.