Gain enhancement of millimeter wave antenna using superstrate

An aperture coupled microstrip patch antenna with high gain operating at 60 GHz is demonstrated for millimeter wave applications. Such patch antennas traditionally suffer from low gain. This drawback is addresses by enhancing the gain through the use of various types of superstrate such as square dielectric, hemispherical lens and spherical lens. The antenna parameters such as S11, gain and radiation field are compared.