Title :
A 24-GHz full-360° CMOS reflection-type phase shifter MMIC with low loss-variation
Author :
Wu, Jen-Chieh ; Chang, Chia-Chan ; Chang, Sheng-Fuh ; Chin, Ting-Yueh
Author_Institution :
Dept. of Electr. Eng., Nat. Chung Cheng Univ., Minsyong
fDate :
June 17 2008-April 17 2008
Abstract :
A 24-GHz bi-directional CMOS reflection-type phase shifter (RTPS) with full 360deg phase tuning range and minimal insertion-loss variation is presented. Two circuit enhancement techniques are employed: the broadside-coupled transformer-based hybrid and the pi-type resonated varactor load. The implemented 0.18-mum CMOS RTPS demonstrates a measured phase shift range of 360deg with small insertion-loss variation of plusmn1.2 dB at 24 GHz. The chip is 0.33 mm2 in area and it consumes zero DC power.
Keywords :
CMOS integrated circuits; phase shifters; tuning; varactors; CMOS reflection-type phase shifter; MMIC; broadside- coupled transformer-based hybrid; circuit enhancement techniques; frequency 24 GHz; low loss-variation; minimal insertion-loss variation; phase tuning; pi-type resonated varactor load; size 0.18 mum; Array signal processing; Bidirectional control; Circuit optimization; MMICs; Phase distortion; Phase measurement; Phase shifters; Reflection; Semiconductor device measurement; Varactors; CMOS; phase shifter; quadrature hybrid; reflection-type; varactor;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium, 2008. RFIC 2008. IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-1808-4
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2008.4561455
