High Efficiency and Broad-Band Operation of Monolithically Integrated W-Band HBV Frequency Tripler

We report on a state-of-the-art monolithically integrated heterostructure barrier varactor (HBV) frequency tripler operating in the W-band frequency range. The device utilizes series connection of four HBV diode mesas, with total 12 barriers, and a cross section area of 700μm^2. The presented tripler withstands 800mW input power, while delivering 185mW of output power at 107GHz. The corresponding conversion efficiency was measured to be 23% and the circuit exhibited 15% 3-dB bandwidth