Broadside Gain Enhancement of Patch Antenna Using Engineered Superstrate

The effect of superstrate material on microstrip patch antenna is established. Engineered superstrate is placed at a certain height from patch antenna such that spherical diverging wave is converted into converging plane wave and gain enhancement in broadside direction is obtained. To verify the simulated results, the proposed prototype is fabricated and measured. Enhancement in a gain of 7.84 dB is observed in broadside direction using a single layer of superstrate at the design frequency of 9.48 GHz.