Title :
A 1.5V low noise figure mixer for 3.5GHz WiMAX systems
Author :
Weng, Ro-Min ; Liu, Shu-Wei
Author_Institution :
Dept. of Electr. Eng., Nat. Dong Hwa Univ., Hualien, Taiwan
fDate :
May 30 2010-June 2 2010
Abstract :
A low noise figure mixer (LNFM) is presented for 3.5GHz location-fixed WiMAX systems which have stringent specifications on noise figure. The architecture of the proposed LNFM is based on a conventional Gilbert-type structure. A center-tapped inductor is added to the transconductance stage to meet the low noise figure requirement. The presented LNFM is implemented with tsmc 0.18μm RF CMOS technology. Input radio frequency signals of 3.5GHz and local oscillation signals of 3.48GHz are set for the desired mixer with output intermediate frequency signals of 20MHz. The conversion gain is 10.69dB. For input power less than -20dBm, the single side band and double side band noise figures are as low as 6.5 dB and 3.5 dB, respectively. The input 1dB compression point is -21dBm. The third-order intercept point achieves -11dBm. The total power consumption is 9.525mW at 1.5V supply voltage.
Keywords :
CMOS integrated circuits; WiMax; mixers (circuits); power consumption; Gilbert-type structure; LNFM; RF CMOS technology; WiMAX systems; frequency 3.5 GHz; low noise figure mixer; radio frequency signals; total power consumption; transconductance stage; voltage 1.5 V; worldwide interoperability for microwave access; CMOS technology; Energy consumption; Inductors; Mixers; Noise figure; RF signals; Radio frequency; Transconductance; Voltage; WiMAX;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5537204
