Investigation of linearly polarized RMPA embedded with 2D-EBG ground plane

The Performance of Rectangular Microstrip Patch Antenna (RMPA) over a 2D-EBG (Two Dimensional Electromagnetic Band Gap) ground plane is investigated and results obtained in numerical 3D electromagnetic simulation software are presented by comparing with a conventional RMPA over optically planar conducting ground. The band gap of a 2DEBG is centered at ISM band, and RMPA is made to operate within the band gap. So the first part of this paper is concentrated on characterization of 2DEBG bands. 2DEBG here is designed to resonate at 2.5 GHz with a forbidden band gap of 1.5 GHz, in phase reflection band gap of 41 MHz and a high impedance of 3540 Ω. The high surface impedance property of 2DEBG leads to RMPA miniaturization. The property of in-phase reflection band of 2DEBG enhances the gain upto 3.5 dB, when compared with the conventional arrangement. Due to surface wave band gap property, smoother radiation pattern and improvement in the radiation efficiency, and an operating band width of 3% has been achieved.