UWB pulse generation for GPR applications

Abstract

In this work, we present a low-complexity, and low cost ultra-wideband (UWB) pulse generators for GPR applications. Here we have implemented two UWB pulse generator circuits. The first pulse generator uses a simple common emitter amplifier followed by RC high-pass filter to generate the Gaussian pulse directly. The circuit provides a Gaussian pulse when activated by a square wave of an external trigger signal and also the pulse width duration tunability by varying the frequency. Using this circuit topology we can achieve 200ns Gaussian pulse. The second UWB pulse generator is based on the avalanche transistor. This pulse generator also provides a Gaussian pulse when activated by a square wave of an external trigger signal. And when activated with 3 kHz square wave, it generates 11ns duration Gaussian pulse.