Design and analysis of a miniature W-band MMIC subharmonically pumped resistive mixer

Author

Lei, Ming-Fong ; Wu, Pei-Si ; Huang, Tian-Wei ; Wang, Huei

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

1

fYear

2004

fDate

6-11 June 2004

Firstpage

235

Abstract

A W-band monolithic sub-harmonically pumped (SHP) resistive mixer was designed and fabricated using a standard 0.15μm PHEMT process. A nonlinear model featuring modified drain-current characteristics was developed and used in circuit simulation. A small chip size of 1.5 × 1.0 mm² was achieved by using a transformer as a LO balun. Measured results of this circuit showed 14-18 dB conversion losses from 75 to 88 GHz, and agree well with simulation. Analysis on circuit imbalance shows that the phase imbalance of the balun is the dominant factor on LO isolation, and the conversion loss is quite robust to all circuit imbalances.

Keywords

HEMT integrated circuits; MMIC mixers; baluns; circuit simulation; millimetre wave mixers; transformers; 0.15 microns; 14 to 18 dB; 75 to 88 GHz; LO balun; LO isolation; PHEMT process; W-band monolithic resistive mixer; chip size; circuit imbalance; circuit simulation; conversion loss; millimeter wave mixer; miniature W-band MMIC; modified drain-current characteristics; nonlinear model; phase imbalance; subharmonically pumped resistive mixer; transformer; Circuit simulation; Coupling circuits; Equations; Impedance matching; Linearity; MMICs; PHEMTs; Semiconductor device measurement; Signal design; Spirals;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2004 IEEE MTT-S International

ISSN

0149-645X

Print_ISBN

0-7803-8331-1

Type

conf

DOI

10.1109/MWSYM.2004.1335854

Filename

1335854