Mixer-based injection-locked frequency tripler

Abstract

An injection-locked frequency tripler with a push-push frequency doubler and a mixer core is demonstrated. The core power consumption of this design takes 5.34 mW. The locking range is from 13.5 GHz to 20.8 GHz. If concerning about the output power flatness, the acceptable frequency range is from 15.9 GHz to 17.1 GHz. The output power is −5 dBm. In addition, the harmonic suppression is −15 dB at least for the second harmonic and more than 30dB for the fundamental one. Another attractive feature is the individual locking range for each varactor tuning voltage covers 3.5 GHz at 0 dBm input power.