Title :
Full 360
Vector-Sum Phase-Shifter for Microwave System Applications
Author :
Zheng, You ; Saavedra, Carlos E.
Author_Institution :
Queen´´s Univ., Kingston, ON, Canada
fDate :
4/1/2010 12:00:00 AM
Abstract :
An innovative vector-sum phase shifter with a full 360?? variable phase-shift range is proposed and experimentally demonstrated in this paper. It employs an active balun and a very high-speed CMOS operational transconductance amplifier (OTA) integrator to generate the four quadrature basis vector signals. The fabricated chip operates in the 2-3 GHz, it exhibits an average insertion gain of 1.5 dB at midband, and has an RMS phase error below 5?? over the measured frequency span. The chip consumes 24 mW of DC power and is highly compact, measuring only 0.38 mm2 including bonding pads.
Keywords :
CMOS analogue integrated circuits; MMIC amplifiers; MMIC phase shifters; baluns; operational amplifiers; OTA integrator; active balun; bonding pads; fabricated chip; frequency 2 GHz to 3 GHz; gain 1.5 dB; innovative vector-sum phase-shifter; microwave system applications; power 24 mW; very high-speed CMOS operational transconductance amplifier; Active balun; differential amplifier; integrated circuit; microwave circuits; phase shifter; quadrature generation;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2009.2025851