Abstract
hiel C. M. Soer , Student Member , IEEE , Eric A. M. Klumperink , Senior Member , IEEE ,
Bram Nauta, Fellow, IEEE, and Frank E. van Vliet , Senior Member , IEEE
Abstract—A 1–4-GHz 4-element phased array receiver front-end
demonstrates spatial interferer rejection using null steering. Ele-
ment phase and amplitude control are performed by a switched-
capacitor vector modulator with integrated downconversion, uti-
lizing a rational sine/cosine approximation. The 65-nm CMOS re-
ceiver achieves more