A Novel Reduced-Size Rat-Race Broadside Coupler and Its Application for CMOS Distributed Sub-Harmonic Mixer

Author

Kuo, Chun-Lin ; Kuo, Che-Chung ; Lien, Chun-Hsien ; Tsai, Jeng-Han ; Wang, Huei

Author_Institution

Nat. Taiwan Univ., Taipei

Volume

18

Issue

3

fYear

2008

fDate

3/1/2008 12:00:00 AM

Firstpage

194

Lastpage

196

Abstract

A broadband distributed sub-harmonic resistive field effect transistor mixer with a novel modified rat-race broadside coupler using a 0.13-mum CMOS foundry process is presented in this letter. Using the broadside coupler, a reduced-size rat-race is fabricated with a compact size of 110 times 80 mum². From the measurement results, the mixer achieved a conversion loss of 12 dB from 32 to 70 GHz of RF frequency. The passive sub-harmonic mixer has zero power consumption. With the modified rat-race broadside coupler, the mixer achieves a good LO-IF isolation of better than 30 dB and a compact core chip size of 0.55 times 0.4 mm².

Keywords

CMOS integrated circuits; MMIC mixers; field effect integrated circuits; integrated circuit design; millimetre wave mixers; waveguide couplers; CMOS distributed sub-harmonic mixer; CMOS foundry process; broadband distributed sub-harmonic resistive field effect transistor mixer; distributed circuit; frequency 32 GHz to 70 GHz; loss 12 dB; modified rat-race broadside coupler; monolithic microwave integrated circuit; passive sub-harmonic mixer; size 0.13 mum; CMOS; distributed circuit; monolithic microwave integrated circuit (MMIC); sub-harmonic mixer;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2008.916806

Filename

4459262