Microwave Imaging over UWB with Antipodal Vivaldi Antenna for Concealed Weapon Detection

Abstract

An Ultra-Wideband (UWB) Antipodal Vivaldi Antenna (AVA) is presented here for microwave imaging applications. To start with, a conventional AVA is designed for reference, and then periodic slit edges or corrugations in the form of sinusoids are furnished at the edges to obtain the desired performance for microwave imaging applications. The proposed antenna achieves high bandwidth from 1.2 – 14 GHz with a peak gain of 13 dBi at 10 GHz with a matching better than 15 dB from 3 – 14 GHz. The proposed antenna will be used for the detection of a concealed gun with different clutter removal algorithms applied to obtain its precise image.