A W-Band tunable Push-Push oscillator with 128X frequency division for frequency synthesis applications

This paper presents a W-Band Push-Push VCO with a 64X static frequency divider, for a total frequency division of 128X, using InP/InGaAs DHBT technology. The oscillator operates around a center frequency of 77.75 GHz with a measured phase noise of < −94 dBc/Hz at a 1 MHz offset, and employs a unique tuning methodology that uses only the intrinsic parasitics of the DHBTs to give a tuning range of 1.3 GHz. The oscillator, which includes buffers to drive the divider chain, has a power dissipation of 84 mW, one of the lowest power dissipations reported for a III–V DHBT based push-push oscillator.