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 700 μm
²
. The presented tripler withstands 800 mW input power, while delivering 185 mW of output power at 107 GHz. The corresponding conversion efficiency was measured to be 23% and the circuit exhibited 15% 3-dB bandwidth.