Design and Fabrication of Patch Antenna Array on Quartz Glass Substrate at 146 GHz

In this paper, the printed D-Band patch antenna and 1×4 array antenna are designed on the quartz glass substrate, which are suitable for millimeter wave applications. The central frequency of the antenna array is designed at 146 GHz. Because there are no metal vias in the quartz glass substrate, the gold belt is utilized to connect the signal ground on the top surface with the antenna ground on the bottom of substrate. The relative position of the gold belt affects the resonant frequency of the antenna. The prototypes of the antennas are successfully fabricated and measured. The measured gain of patch antenna unit and antenna array are 6.6 dBi and 11.4 dBi, respectively, at 146 GHz. The S11 below -10 dB bandwidth are about 6.4% and 5.9%, respectively.