Comparison between Two CPW-FED UWB Antennas based on different feeding techniques

Abstract

Design and analysis of a compact Ultra Wideband (UWB) slot antenna is presented in this paper. The antenna consists of a combination of rectangular and Y- shaped slot. The CPW feed is designed for 50Ω impedance. The characteristics of the designed structure are investigated by using MoM based electromagnetic solver, IE3D. The antenna was fabricated with CPW feed and transmission line feed. But after the extensive analysis of antenna with different feed, it is found that the antenna gives the better performance for Transmission line feed. For apply a CPW feed we get a bandwidth of about 812.75 MHz whereas for transmission line feed we achieve a UWB bandwidth of about 10 GHz approximately. But for transmission line feed, when the feeds are act as a parasitic element then we don’t achieve a good result but when all the ports are active we achieve a UWB bandwidth. The simple configuration and low profile nature of the proposed antenna leads to easy fabrication that may be built for any wireless UWB device applications.