A 1.5 to 37 GHz ultra-broadband MMIC Mouw´s star mixer

Author

Chang, Chi-Yang ; Liao, Ching-Ku ; Niu, Dow-Chih

Author_Institution

Dept. of Commun. Engr., National Chiao-Tung Univ., Hsinchu, Taiwan

Volume

2

fYear

2005

fDate

4-6 Oct. 2005

Abstract

A MMIC ultra-broadband star mixer using Mouw´s hybrid junction is presented in this paper. The MMIC chip uses 0.15μm HEMT process. The chip is measured in three mounting environments, namely, absorber backed, 15mil Al₂O₃ substrate plus absorber, and conductor backed and all of them show ultra-broadband performances. The measured results show that the bandwidth is from 1.5 to 37GHz except a resonant dip near 23 GHz occurs in conductor backed case. The IF 3dB bandwidth is from DC to 2.5GHz. The chip can be used as either up- or down-converter. Because the spiral layout of the Mouw´s hybrid junction shrinks the area significantly, no off chip baluns are required. The chip size is 2mm by 2mm.

Keywords

MMIC mixers; aluminium compounds; baluns; 1.5 to 37 GHz; 15 mil; 2 mm; Al₂O₃; HEMT process; MMIC chip; Mouw hybrid junction; Mouw star mixer; conductor backed case; down-converter; off chip baluns; ultra-broadband MMIC; up-converter; Bandwidth; Conductors; HEMTs; Hybrid junctions; Impedance matching; MMICs; Performance evaluation; Resonance; Semiconductor device measurement; Spirals;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2005 European

Print_ISBN

2-9600551-2-8

Type

conf

DOI

10.1109/EUMC.2005.1610094

Filename

1610094