Study and Design of Single and Double Layer Square Patch Antennas for UWB Applications

摘要

This paper presents the design of Single and Double Layer microstrip patch antennas for ultra-wideband applications. This structure consists of a square patch with a partial ground plane, fed by a 50 Omega microstrip line. This antenna is designed for a system to detect malignant tumors by microwave imaging. Prototypes of the two antennas are fabricated and tested with a network analyzer. The proposed antenna can achieve an ultra-wide bandwidth with VSWR<2 from 3.82 GHz to 11.72 GHz for single layer antenna and from 3.2 GHz to 10.95 GHz for double layer antenna, with stable and bi-directional radiation pattern. The gain is good and has a peak value of 6.5 dBi. The simulation of this antenna has been performed using Ansoft High Frequency Structure Simulator (HESS) and Computer Simulation Technology-Microwave Studio (CST).