Majlesi Journal of Electrical Engineering A Wide Tuning Range and Low Phase Noise VCO using New Capacitor Bank Structure Volume 12 (2018) Issue 4, December 2018 2024 02 15 A Wide Tuning Range and Low Phase Noise VCO using New Capacitor Bank Structure EN Mostafa Katebi University of Zanjan Abbas Nasri University of Zanjan Siroos Toofan University of Zanjan Journal Article 2024 02 15 This paper presents a wide tuning range, and low noise voltage controlled oscillator (VCO) based on cross-coupled and colpitts structures. The advantages of this work provide a low-phase noise and robust start-up condition, leading to minimized the dc power. In addition, a new structure of capacitor bank is used in this structure to achieve a wide range of frequency. The proposed circuit is simulated in 0.18 µm CMOS process. The designed VCO covers the frequency range of 21.95 GHz to 24 GHz with a tuning range of 8.9%. Simulation results show that the phase noise is -120.5 dBc/Hz at 1MHz offset frequency for 23GHz carrier frequency.  Also, power consume of the VCO is 6.34 mW under 1.8 supply voltage, and the figure-of-merit is -191.68 dBc/Hz.