Investigation of Compact Antenna using Shorting Plates for Wireless Communication

Compact structure of Microstrip patch antenna is reported in this paper. A new technique of reducing the size of antenna is investigated with analytical formulation by shorting a patch and ground plane with two plates and insertion of such unit in close vicinity to the feed position achieves a 90% size reduction with additional characteristics such as circular polarization, higher directivity and appropriate bandwidth. This paper describes analytical formulation and presents simulation and measurement results. The simulated and measured impedance bandwidths of proposed antenna is 2-5% and achieves a gain of 1.42dBi at operating frequency of 2.43GHz.