Design of slotted Vivaldi antenna for through wall imaging system

Abstract

This paper deals with parametric study and design of slotted Vivaldi antennas, which is suitable for Through Wall Imaging (TWI) Radar systems. For through wall imaging (TWI) application, the transmitting and receiving antenna must be compact and lightweight for portability, high gain, easy to make array and ultra-wide bandwidth. Therefore, Design and fabricate of Vivaldi antenna, an exponentially tapered slotted antenna (ETSA) having broadband width, high efficiency and high gain characteristics. The paper discusses complete design and optimization process of a Vivaldi antenna using CST Microwave studio and also briefly describes its fabrication process. The report also enumerates critical parameters of the fabricated antenna including its S-parameter, beam width and gain. Specifically, it focuses on target detection, range profile and scanning & imaging of a stationary target behind 18cm thick concreate wall.