Through the Wall Imaging RADAR

Abstract

The ability to localize and characterize objects hidden behind walls is highly desirable and has the potential to save countless lives. Multiple technologies are applicable for through-the wall surveillance; however, Ultra Wideband (UWB) technology provides a fine tradeoff between image resolution and penetration and is well suited for localization and characterization of objects behind a wall. The UWB radar system involves development of a comprehensive and portable solution for Through-Wall Vision. Radar principle of operation has been used for the design and development of the system. An antenna system comprising of Vivaldi array and Wilkinson power divider transmits electromagnetic waves in the range of 3-6 GHz in a certain direction, which strikes the wall and penetrates it, after hitting the target reflects back and is received back after some time at the antenna system. Information about the target is then extracted from the received signal. Image is extracted after applying some image processing techniques on the data received from the vector network analyzer.