Metamaterial superstrate for performance enhancement of microstrip patch antenna array

A metamaterial superstrate loaded microstrip patch antenna array has been proposed in this paper. The unloaded array resonates at 5.8 GHz with gain of 4.3 dBi and bandwidth of 425 MHz whereas, when the array is loaded with a metamaterial superstrate, composed of Multiple Split Ring Resonators (MSRR), gain and bandwidth reaches to 8 dBi and 680 MHz, respectively. The transmission line model of the composite structure has also been developed.