Title :
A 60-GHz Millimeter-wave CMOS Marchand Balun
Author :
Liu, J.-X. ; Hsu, C.Y. ; Chuang, H.-R. ; Chen, C.Y.
Author_Institution :
Nat. Cheng Kung Univ., Tainan
Abstract :
A novel 60-GHz wideband Marchand balun fabricated with a standard 0.18 mum 6-metal-layer CMOS process for millimeter-wave applications is presented. A technique for achieving good balance with the fourth metal layer microstrip conductor is used in the designed Marchand balun. The fabricated CMOS balun uses multilayer coupling with the top two layers. An output matching network is added to improve the output return loss. The measured amplitude imbalance was about plusmn 1.5 dB from 25 to 65 GHz , over the 89% operating frequency band.
Keywords :
baluns; coupled circuits; microstrip circuits; millimetre wave amplifiers; frequency 60 GHz; microstrip conductor; millimeter-wave CMOS; multilayer coupling; output matching network; size 0.18 mum; wideband Marchand balun; CMOS process; CMOS technology; Coupling circuits; Impedance matching; Millimeter wave communication; Millimeter wave measurements; Millimeter wave radar; Millimeter wave technology; Nonhomogeneous media; Transmission line theory; CMOS; Marchand balun; millimeter-wave; multilayer coupling; shielding;
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.2007.380920
