Compact microstrip antennas on a high relative dielectric constant substrate at 60 GHz

A high relative dielectric constant substrate has been combined with a slot-loading technique to reduce antenna size. Further, the slot-loading technique has been used in an array configuration to increase the bandwidth by exciting each element at a different resonant frequency. This method results in almost a 30% decrease in size and 1.5% increase in bandwidth. Two 2×1 antenna arrays are demonstrated with a total area less than 2.5mm².