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A frequency multiplication based LO phase shifting technique for phased-array architectures

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2 Author(s)
Soliman, Y. ; Dept. of Electron., Ottawa, ON, Canada ; Mason, R.

A frequency multiplication based LO phase shifting technique is presented for use in phased-array front end architectures operating in the ISM band at 24 GHz. The presented architecture employs a two-stage phase shifter, a high-speed comparator and a Q-enhanced tuned amplifier to synthesize 18 GHz tones from a 2GHz reference. The synthesized tones are used to injection lock 18 GHz LC-oscillators in close proximity to the RF/mm-w front-ends in a phased-array system. A digital means for phase shift calibration is discussed. Implemented in IBM's 120 nm CMOS technology, the proposed architecture consumes 14.2 mW from a 1.2 V supply. The oscillator core consumes 3.7 mW. The maximum phase shift errors at 18GHz is 5° and 0.79° before and after calibration, respectively.

Published in:

Radio and Wireless Symposium (RWS), 2010 IEEE

Date of Conference:

10-14 Jan. 2010

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