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

fYear

2010

fDate

May 30 2010-June 2 2010

Firstpage

2211

Lastpage

2214

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISCAS.2010.5537204

Filename

5537204