U- and V-band signal sources in Si/SiGe technology

Abstract

A U-band VCO and a V-band push-push frequency doubler are designed in a 0.25 mym SiGe:C BiCMOS technology. The VCO oscillates from 48 GHz to 55 GHz, with an output power of around - 1 dBm and a phase noise of - 84 dBc/Hz at 1 MHz offset. The push-push frequency doubler has a minimum loss of 12 dB at 50 GHz for an input power of 6 dBm. It achieves an output power of - 2.4 dBm at 50 GHz and - 5.8 dBm at 75 GHz for an input power of 10 dBm. The VCO is biased at 4 V consuming 36 mA, and the push-push doubler draws 9.4 mA from a 2 V supply.