A New Sub-harmonic Mixer Using Switched Gm Technique For 802.11a/b/g Dual-Band Receivers

Author

Chang, Win-Ming ; Wu, Hui-I ; Jou, Christina F.

Author_Institution

Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu

fYear

2007

fDate

11-14 Dec. 2007

Firstpage

1

Lastpage

4

Abstract

A new prototype of sub-harmonic mixer using switched Gm technique is designed and implemented in a standard 0.18 um CMOS technology. By using the PMOS active load and a switched Gm prototype at LO port, the new sub-harmonic mixer can achieve high conversion power gain and still maintain high linearity, and we can alleviate the shortage of the voltage headroom at IF output. In addition, it consumes no DC power while there is no LO input. At 5.2-GHz ISM band, this fully integrated sub-harmonic mixer achieves measured high conversion power gain of 12.8 dB, -1.8 dBm input third order intercept point (IIP3), and 14.0 dB noise figure at 10-MHz with 4 dBm LO power.

Keywords

CMOS integrated circuits; microwave mixers; radio receivers; wireless LAN; 802.11a-b-g dual-band receiver; CMOS technology; Gilbert mixer; PMOS active load; frequency 5.2 GHz; input third order intercept point; size 0.18 mum; subharmonic mixer; switched Gm technique; CMOS process; CMOS technology; Communication switching; Dual band; Microwave communication; Microwave theory and techniques; Noise figure; Noise measurement; Prototypes; Voltage; CMOS sub-harmonic mixer; Gilbert mixer; Switched transconductor mixer; dual-band;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2007. APMC 2007. Asia-Pacific

Conference_Location

Bangkok

Print_ISBN

978-1-4244-0748-4

Electronic_ISBN

978-1-4244-0749-1

Type

conf

DOI

10.1109/APMC.2007.4555046

Filename

4555046