Metamaterial Superstrate Based High Gain Antenna for Wi-Fi Applications

In this paper, a novel technique to improve the gain of the microstrip antenna using a metamaterial lens for S-band applications is discussed. An Omega-shaped structure is proposed to focus the electromagnetic field in the desired manner to increase gain and bandwidth. omega formations are combinations of a line and a ring to produce negative permeability and permittivity. The approach and process for extracting negative refractive index from scattering components in metamaterials are investigated. The metamaterial is designed and placed on the antenna which acts as a lens for focusing electromagnetic waves to improve the antenna gain. The simulation results are presented. The band with of antenna is (2.434GHz to 2.490GHz) 56MHz and the gain enhancement of 3.41dB was achieved. The results are compared with published work. When compared to a standard microstrip design bandwidth of the metamaterial-enhanced proposed antenna has increased by 10.1%.