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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)
Soer, M.C.M. ; IC-Design Group, Univ. of Twente, Enschede, Netherlands ; Klumperink, E.A.M. ; Nauta, B. ; van Vliet, F.E.

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:

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