Broadband CMOS Gilbert Down-Converter utilizing a low-loss step-impedance rat-race coupler

Author

Wei, Hung-Ju ; Meng, Chinchun ; Yu, Sheng-Wen

Author_Institution

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

fYear

2009

fDate

7-12 June 2009

Firstpage

1101

Lastpage

1104

Abstract

A Broadband Gilbert Down-Converter with step-impedance rat-race coupler is demonstrated using 0.13 mum standard CMOS technology. The proposed method utilizes higher effective dielectric-constant, phase-inverter and step-impedance techniques simultaneously to make the rat-race coupler more compact (~ 64% reduction) and phase-balanced over a wide operating bandwidth. The down-converter has NF of 16 dB and LO-to-RF isolation of better than 35 dB. The mixer core consumes 2.9 mA at V_dd=1.8 V.

Keywords

CMOS integrated circuits; mixers (circuits); permittivity; power convertors; waveguide couplers; broadband CMOS Gilbert down-converter; current 2.9 mA; dielectric-constant; noise figure 16 dB; phase-inverter; size 0.13 micron; step-impedance rat-race coupler; voltage 1.8 V; Bandwidth; CMOS technology; Coupling circuits; Dielectric substrates; Frequency; Impedance; Inverters; Millimeter wave technology; Noise measurement; Silicon on insulator technology; Gilbert mixer; Rat-race coupler; phase inverter; step impedance;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International

Conference_Location

Boston, MA

ISSN

0149-645X

Print_ISBN

978-1-4244-2803-8

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2009.5165893

Filename

5165893