Sensitivity Analysis of Microwave UWB Radar for TWI System

Through wall imaging (TWI) using microwave radar system is an experimental approach in real time to collect the information about the living/nonliving target object hidden behind the wall made of any dielectric material and unknown thickness. The true and exact information of the target object is dependent not only on the wall parameters (thickness and dielectric constant) but also on the operating parameters of the radar system like radar antenna power, bandwidth, frequency points etc .The incorrect information about the wall parameters and inaccurate chosen operating parameters results in wrong and false information about the target .In the present paper an effort has been made through experimental approach to check the sensitivity of TWI system operating at a frequency of 1-3GHz considering the operating parameter like frequency point. Different varying frequency points of the signal operating frequency has been considered for analysis and target range has been calculated by applying signal processing techniques. It has been is observed that measured range is not affected by varying frequency points. Brick and cement concrete wall of known thickness has been taken into the consideration and triangular metal sheet has been used as target object. The real time data has been collected and processed using MATLAB software and the entire arrangements have been made in an indoor environment