D-band Quasi-Yagi Antenna in Glass-based Package

This paper presents design, fabrication and measurement results of a printed quasi-Yagi antenna with monopole radiator on glass substrate with low-loss polymer buildup films operating in D-band. Simulated peak gain of the antenna is 6.2 dBi, measured impedance bandwidth $\left(\left|S_{11}\right|\lt-10 \mathrm{~dB}\right)$ covers the entire D-band $(110-170 \mathrm{GHz})$. Size of the antenna is $0.887 \mathrm{~mm}$ $\times 0.919 \mathrm{~mm}$, or $0.413 \lambda_{0} \times 0.429 \lambda_{0}$ at 140 GHz. Return loss measurements show high repeatability. Wide bandwidth of the antenna, high simulated gain, compact size, and advantages of glass-based packages in terms of supporting high level of integration using Glass Panel Embedding makes it suitable for handset devices for sub-THz wireless communications in D-band.