The design of two fully integrated 43-GHz voltage-controlled oscillators (VCOs) implemented in a 90-nm CMOS process is presented. Both use standing-wave transmission line resonators instead of a lumped LC tank to provide extended output frequency ranges and relatively low phase noise (PN). Coplanar waveguide structures with and without slow-wave features were employed in the two VCO circuits. The test results of the manufactured chips were compared. The circuit with the slow-wave feature showed a lower PN (-102.7 dBc/Hz at 1 MHz), whereas the one without the slow-wave structure showed a wider tuning range (1.96 GHz). The two VCOs were developed for use in licensed E-band transceiver systems.

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Keywords E-band application, fully integrated CMOS voltage-controlled oscillator (VCO), millimeter wave, slow-wave coplanar waveguide (CPW) transmission line, standing-wave resonator
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Journal IEEE Transactions on Circuits and Systems II: Express Briefs
Li, M. (Ming), & Amaya, R. (2012). Design of mM-W fully integrated CMOS standing-wave VCOs using low-loss CPW resonators. IEEE Transactions on Circuits and Systems II: Express Briefs, 59(2), 78–82. doi:10.1109/TCSII.2011.2180095