DefinePK

Abstract

In this paper, the development of a compact circular microstrip patch based Ultra-Wideband (UWB) antenna with the inclusion of a regular Defected Ground Structure has been presented. Firstly, a primary UWB circular patch antenna with resonant frequency of 7.5 GHz is designed with FR4 substrate. DGS has been incorporated to this antenna in multiple levels by varying the shape of DGS. It is observed that the primary antenna with final modified ground plane shows a better performance with reference to operating frequency range. The proposed antenna is designed to operate from 3.1 to 20 GHz frequencies. The proposed circular patch antenna shows enhanced bandwidth, when compared to the basic circular patch antenna with rectangular DGS. The antenna uses low cost laminate of FR4 with thickness of 1.6 mm and dielectric constant of 4.4. The simulations are carried out using 3D EM Simulator. The details of proposed circular patch antenna with partial ground plane design and measured results are presented and discussed. The simulated results are in good agreement with the fabricated UWB antenna.