Title :
A 2-10 GHz Digital CMOS Phase Shifter for Ultra-Wideband Phased Array System
Author :
Kang, Dong-Woo ; Hong, Songcheol
Author_Institution :
Korea Adv. Inst. of Sci. & Technol., Daejeon
Abstract :
This paper describes a digital true time-delay phase shifter implemented in 0.18-mum CMOS process for ultra-wideband phased array application. The phase shifter exhibits linear phase change versus frequency, digital control, low insertion loss, and reduced circuit size. Shunt-series peaked load increases the bandwidth of the phase shifter, yielding a flat gain response over a wide bandwidth. The fabricated circuit demonstrates a measured 157.5deg phase tuning range in steps of 22.5deg at 10 GHz.
Keywords :
CMOS digital integrated circuits; MMIC phase shifters; UHF integrated circuits; UHF phase shifters; ultra wideband communication; digital CMOS phase shifter; digital true time-delay phase shifter; flat gain response; frequency 2 GHz to 10 GHz; linear phase change; shunt-series peaked load; size 0.18 mum; ultra-wideband phased array system; Bandwidth; CMOS process; Circuits; Digital control; Frequency; Insertion loss; Phase measurement; Phase shifters; Phased arrays; Ultra wideband technology; CMOS integrated circuit; phase shifters; phased arrays;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2007 IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0530-0
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2007.380909
