A BROAD-BAND ACTIVE FREQUENCY DOUBLER OPERATING UP TO 120 GHZ
04 October 2005
A broad-band monolithic integrated active frequency doubler operating in DC-120 GHz frequency range is presented and compared with several previous versions. The circuit is fabricated in a self-aligned InP DHBT process. Circuit measurements show sinusoidal output waveform at 120 GHz. For -8 dBm input power, the doubler has a maximum conversion gain of -0.25 dB at 50 GHz due to a peaking inductor on the doubler output.