Double Layer Metamaterial Superstrate for Performance Enhancement of a Microstrip Patch Antenna

Abstract

In this paper, a metamaterial antenna operating at a frequency of 5.8 GHz is presented. Metamaterial superstrate cover acts as a lens which focuses the EM radiations due to the unusual properties of the metamaterial.This leads to improvement performance of patch antenna along with its physical protection.The proposed metamaterial lens consists of a double layer of 9-by-9 matrix of Split-Ring Resonators (SRRs), and is positioned above a probe-fed rectangular patch resonating at 5.8 GHz. The structure improve the gain and directivity of a simple patch antenna up to 7 dB.Simulation results of the proposed antenna are presented and discussed in this letter.

Applications of Metamaterials and Metasurfaces

“…These unit cells can be loaded on either side of the superstrate. The number of superstrates, the number of unit cells, and the distance between the radiating element and the superstrate all play a key role on the gain performance and directivity of the conventional antenna [38] (Figure 11). The directivity and gain of the traditional antenna can be significantly increases by integrating metamaterial into the antenna design.…”

“…Figure 11. Patch antenna with a double layer metamaterial superstrate: (a) front and top view of the antenna, (b) unit cell of SRR, and (c) directivity with/without superstrate[38].…”