A 60-GHz LTCC microstrip grid array antenna

This paper presents the design of a microstrip grid array antenna and more importantly describes the integration of it into a grid array package in a low temperature cofired ceramic (LTCC) technology for highly-integrated 60-GHz radios. The grid array antenna package has a small volume of 13.5×8×1.265 mm³ and can house a 60-GHz radio die of current size. The microstrip grid array antenna package samples were fabricated and measured. Measured results show good agreement with simulated ones. It achieved good matching (|S₁₁|=-10 dB), high efficiency (η>;85%), and directional patterns with the main beam in the boresight direction from 57 to 64 GHz as well as high gain with the peak value of 14.5 dBi at 60 GHz.