A compact wideband microstrip patch antenna with defected ground plane

Abstract

In this paper, a compact design and construction of microstrip broadband antenna is proposed. The proposed antenna has the capability of operating between 1.8GHz to 12GHz. The antenna parameter in frequency domain analysis has been investigated to show its capability as an effective radiating element. The simulation results demonstrated good broadband linear transmission performance. A prototype is developed and measurement results are well in agreement. The highest efficiency claimed 92% at 2 GHz and minimum efficiency is 70%. The measured E-plane and H-plane radiation pattern in the entire bandwidth are identical in shape and the direction of maximum radiation is normal to the patch geometry. The designed antenna has a modified ground plane with diagonal edges, L-shaped slot and parasitic patches to main patch for the design of comp act antennas. The proposed low-cost, compact-size rectangular patch antenna on 4.7cm × 3.6cm printed circuit board (FR-4) is designed.