Title :
A 3.1∼4.8 GHz wideband mixer for MB-OFDM UWB receivers with improved noise performance
Author :
Gao, Yang ; Huang, Fengyi ; Cheng, Jia ; Wu, Lianhong
Author_Institution :
RF&OEIC Res. Inst., Southeast Univ., Nanjing, China
Abstract :
A CMOS down-conversion mixer for MB-OFDM (Multi-Band Orthogonal Frequency Division Multiplexing) UWB (Ultra-Wide Band) application is presented. The mixer is implemented with a double-balanced Gilbert-cell architecture and adopts dynamic current source to improve noise performance. Two inductors are also introduced to reduce the flicker noise. Designed in SMIC 0.18 ¿m CMOS process, simulation results show a conversion gain of 9 to 11.5 dB, a noise figure of 10.8 to 13.2 dB, and an input-referred third-order intercept point of -10.5 to -8.2 dBm. The power consumption of the mixer core is 11.3 mW.
Keywords :
CMOS integrated circuits; MMIC mixers; OFDM modulation; field effect MMIC; flicker noise; integrated circuit noise; radio receivers; ultra wideband communication; MB-OFDM UWB receivers; SMIC CMOS process; double-balanced Gilbert-cell architecture; dynamic current source; flicker noise; frequency 3.1 GHz to 4.8 GHz; gain 9 dB to 11.5 dB; improved noise performance; inductors; multiband orthogonal frequency division multiplexing; noise figure 10.8 dB to 13.2 dB; power 11.3 mW; power consumption; size 0.18 mum; third-order intercept point; wideband mixer; Energy consumption; Linearity; Mixers; Noise figure; OFDM; Parasitic capacitance; Radio frequency; Switches; Transconductance; Ultra wideband technology; CMOS; Gilbert Mixer; UWB; low noise; wideband;
Conference_Titel :
Information, Computing and Telecommunication, 2009. YC-ICT '09. IEEE Youth Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-5074-9
Electronic_ISBN :
978-1-4244-5076-3
DOI :
10.1109/YCICT.2009.5382433
