60 GHz antennas on silicon with embedded cavity-backed structure

In this paper a new silicon-based antenna structure with an embedded back cavity is presented. The basic antenna with an optimized geometry has good impedance matching with return loss of -40 dB at the resonant frequency of 60 GHz and a gain of 7.6 dBi. A multi-layer structure can be realized that can lead toward the design of electromagnetic bandgap (EBG) layers inside the antenna to obtain desirable radiation characteristics. An example of such a structure is illustrated with a U-form uniplanar periodic structure under the radiating element that increases its gain by about 0.7 dBi at 60 GHz.