Single-Feed C-shaped Microstrip Antenna with Co-axial Feed for Tri-band Applications

Abstract

In this paper, a compact circular shaped microstrip monopole patch antenna is presented. The proposed antenna comprises a plane of three circles coincides with each other C-shaped rectangular slot element with another inverted C-shaped shaped rectangular slot introduced inside circular patch which offer tri band. The impedance bandwidth can be tuned by changing the ground plane geometry parameters (length and/or its width). The overall size of the antenna is 26mm×22mm×0.8mm including finite ground feeding mechanism. The antenna operates in tri bands which are 5.9-6.1 GHz, 7.2-7.4 GHz and 9.1-9.3 GHz. Stable Omnidirectional radiation patterns in the desired frequency band have been obtained. The proposed geometry was practically realised and tested its parameters. Measured data fairly agree with the simulated results.