Highly Efficient Unpackaged 60 GHz Planar Antenna Array

A high gain antenna array is designed and fabricated at 60 GHz. The array is via-less and made on a single dielectric substrate. It can be easily integrated with millimeter wave transceivers. Very good agreement between the measured and simulated results is achieved. The array has 22.5 dBi gain with a maximum efficiency of 93% and a 3.2 % bandwidth.