The Millimeter-Wave Injection Phase-Locked Technology with Second Harmonics Suppression

The purpose of the project is to investigate the method of phase noise improvement of millimeter wave VCO by using injection-locked technique through CMOS 90 nm process. To increase output efficiency, a miniaturized Compact Microstrip Resonating Cell (CMRC) will be implemented for second harmonics suppression. Traditional frequency divider at microwave frequency operation dissipates most power of the whole phase-locked loop circuit. The proposed design combines the advantages of lower power dissipation injection-locked VCO, compact and low insertion loss CMRC second harmonics suppression to improve the VCO performance. It not only improves the phase noise but also enhances the power output efficiency of the proposed millimeter wave VCO. The content of the project includes: (1) Using fundamental, second harmonics and higher harmonics injections for wide dynamic locking range, low phase noise and low power dissipation design of the millimeter wave VCO. (2) Using hair-pin CMRC and push-push injection-locked structure to reduce the power dissipation and improve the phase noise of the millimeter wave VCO.

Project ID:PB9907-12669
External Project ID:NSC99-2221-E182-026