Design of a microstrip square-ring slot antenna filled by an H-shape slot for UWB applications

Abstract

A novel microstrip slot antenna for UWB (Ultra Wideband) applications is proposed. A square ring slot antenna is filled by an H shape slot as a parasitic element. This structure is fed by a single microstrip line with a fork like-tuning stub. Experiments are carried out to investigate its return loss, its radiation and its time domain behavior, which exhibit good radiation pattern and impedance bandwidth over the entire band of frequency. Time domain consideration also exhibits that this antenna can be used with short pulses. Extended from the proposed antenna, one advanced band-notched (5.5-7 GHz) design is also presented as a desirable feature for UWB applications.