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Spatial Interferer Rejection in a Four-Element Beamforming Receiver Front-End With a Switched-Capacitor Vector Modulator

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4 Author(s)
Michiel C. M. Soer ; IC-Design group, University of Twente, Enschede, the Netherlands ; Eric A. M. Klumperink ; Bram Nauta ; Frank E. van Vliet

A 1-4-GHz 4-element phased array receiver front-end demonstrates spatial interferer rejection using null steering. Element phase and amplitude control are performed by a switched-capacitor vector modulator with integrated downconversion, utilizing a rational sine/cosine approximation. The 65-nm CMOS receiver achieves more than 20 dB of spatial interferer rejection up to an angular separation of 15°.

Published in:

IEEE Journal of Solid-State Circuits  (Volume:46 ,  Issue: 12 )