Antenna Design and Components Selection for Ground Penetrating Radar Under Debris Application

Abstract

Ground Penetrating Radar (GPR) system is a built up geophysical system. The technique uses radio waves to test "the ground" which implies on any low loss dielectric material. In starting, GPR was basically associated with trademark geologic materials. GPR is similarly very much connected to a large group of materials, for example, wood, cement, and asphalt. The detection under collapsed is a developing field of GPR. In the recent years, mechanical arrangements and dealing with methodologies have been made to improve location precision and accelerate limitation. GPR can be helpful to handle such crises. Improvement in the area of GPR has been considered in this report. All things were considered for doing this. Earthquake and fallen structures are the circumstances that need different GPR applications. In the past it was handled by preparing radargram, while the variation in the Doppler frequency was introduces by physical movements of trapped, for instance, respiration. The principle goal of this task is to rescue more & more number of individuals from the adverse condition. Thus, GPR used to differentiate between the couple of objects on the same elevation at different distance and also identify and locate a human body and therefore possibly save number of lives and reduced number of deaths. For the matching of antenna exponential tapering is done so that the antenna is matched to the feed and better return loss is achieved. The return loss is less from -10dB and the frequency band for the prototype is 0.5GHz to 1.5GHz. For avoiding the high cost issues and to make portable device, worked on the miniaturization of helical antenna. The better results are found between the range of 0.75GHz to 1.3GHz. Also select the modulator (function generator) that gives input to VCO on 10 vpp for saw tooth, triangular and sinusoidal waveforms. It operates from 1Hz to 1MHz.