A　high　performance　voltage-controlled-oscillator　(VCO)　using　novel　transistor-based　active　inductors　(AIs)　is　presented.　The　designed　AI,　featured　with　wide　operation　bandwidth,　tunable　inductance　and　high　quality　factor　(Q),　is　connected　in　parallel　with　a　voltage-controlled　array　capacitor　(VCAC)　to　form　LC　resonant　tank,　resulting　in　lower　phase　noise　and　wider　frequency　tuning　range　of　VCO.　The　performances　of　the　VCO　are　further　improved　by　combining　a　current-reused　cross-coupling　pair　(CR-CCP)　to　realize　low　power　consumption　and　a　tail　current　source　noise　reduction　module　(TCS-NRM)　to　reduce　phase　noise.　As　a　result,　the　VCO　with　high　Figure　of　Merit　(FOM)　is　achieved.　Based　on　TSMC　0.18-μm　CMOS　process,　the　proposed　VCO　is　verified　by　Cadence　Design　Systems.　The　results　show　that　the　oscillation　frequency　can　be　tuned　from　6.0　GHz　to　8.4　GHz,　the　lowest　phase　noise　is　-111.6　dBc/Hz　at　1-MHz　offset,　and　the　power　consumption　is　1.68　mW,　and　hence　the　FOM　reaches　-186.1　dBc/Hz.　©　2023　IEEE.