A 60-GHz CMOS Frequency Tripler With Broadband Performance

A 60-GHz differential frequency tripler with broadband performance was implemented in 90-nm CMOS technology. A Gm-boosted topology and notch filter were used in a fully differential cascode configuration to improve the performance of broadband and harmonic suppression. The proposed frequency tripler exhibits a measured 3-dB bandwidth ranging from 51.3 to 70.2 GHz, with a minimum conversion loss of 5.24 dB at 60 GHz. Compared with the third-harmonic frequency, the fundamental frequency and second-harmonic frequency are suppressed by more than 29.2 and 33.7 dBc, respectively.