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

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...

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Bibliographic Details
Published in:IEEE journal of solid-state circuits 2011-12, Vol.46 (12), p.2933-2942
Main Authors: Soer, M. C. M., Klumperink, E. A. M., Nauta, B., van Vliet, F. E.
Format: Article
Language:English
Subjects:
Applied sciences
Array signal processing
Beamforming
Circuit properties
Circuits of signal characteristics conditioning (including delay circuits)
Design. Technologies. Operation analysis. Testing
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Hardware
Input-output equipment
Integrated circuits
interference nulling
mixer
Phase modulation
phase shifter
Phase shifters
phased arrays
Receivers
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Signal convertors
spatial filtering
Switched capacitor networks
switched-capacitor
vector modulator
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Summary: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°.
ISSN:0018-9200
1558-173X
DOI:10.1109/JSSC.2011.2163553