Abstract: Based on the IBM 90 nm RF CMOS technique, an injection-locked millimeter-wave frequency divider with a locking range from 49.8-55.8 GHz was designed. Inductor, co-planner waveguide (CPW), and microstrip have been compared. Inductor with higher quality factor was used in Oscillator core to improve phase noise. CPW was used in input match network to get broadband match, and it was also used in injection net to reduce layout area. Bias voltage of oscillator core and input transistor was optimized to improve the locking range.

Key words: CMOS, millimeter-wave, injection-locked, CPW