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A High-Efficiency, High-Power Millimeter-Wave Oscillator Using a Feedback Class-E Power Amplifier in 45 nm CMOS

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4 Author(s)
Juntunen, E. ; Sch. of Electr. & Comput. Eng., Georgia Electron. Design Center, Atlanta, GA, USA ; Dawn, D. ; Pinel, S. ; Laskar, J.

A high-efficiency high-power millimeter-wave oscillator was implemented in IBM 45 nm silicon-on-insulator (SOI) CMOS using a class-E power amplifier in a feedback configuration. The oscillator achieves a peak output power of +4.6 dBm, a peak efficiency of 11.54%, and phase noises of -106.61 dBc/Hz and -131.28 dBc/Hz at 1 and 10 MHz offsets, respectively. All matching circuits and inductive elements are realized on-chip with transmission line for application in the millimeter-wave frequency bands. The oscillator is tunable between 41.08 GHz and 42.87 GHz by using a λ/4 stub terminated with a varactor in the feedback path. The circuit achieves the highest reported efficiency and output power for silicon-based monolithic millimeter-wave oscillators to the best of the authors' knowledge.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:21 ,  Issue: 8 )