Wide tuning range low phase noise VCO for V-band application

In this study, millimetre wave (MMW) voltage controlled oscillator (VCO) is designed using 130nm complementary metal-oxide-semiconductor single poly eight metals (1P8M) technology. Under 0.8V supply, VCO can be tuned from 46 to 61.2GHz, i.e. 28% frequency tuning range (FTR) is achieved. For the highest oscillation frequency, phase noise at 10MHz offset frequency is -117.3dBc/Hz, while the power dissipation is 9.39mW. The FTR is improved by adopting multiband scheme using transformer tuned technique. Improvement in phase noise is done with a P-type metal-oxide-semiconductor as a variable capacitor for fine tuning of each band. Single N-type metal-oxide-semiconductor switch is placed on secondary side of transformer which makes the transformer tunable. Figure of merit of the proposed circuit is -183.3dBc/Hz. Proposed VCO provides wide FTR and acceptable low phase noise for V-band application.