Title :
A W-band image reject mixer for astronomical observation system
Author :
Wu, Yi-Ching ; Lin, Shi-Kai ; Chiong, Chau-Ching ; Tsai, Zuo-Min ; Wang, Huei
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
In this paper, the design of a broadband fundamental mixer using an improved Lange coupler is presented. This W-band image reject mixer is implemented in 0.15-μm GaAs PHEMT process. This mixer demonstrates measured conversion loss about 10.5 dB from 90~112 GHz and image rejection about 15.9 dB from 82~ 116.5 GHz. All the characteristics of this mixer facilitate the application in ALMA project.
Keywords :
HEMT integrated circuits; III-V semiconductors; MMIC mixers; astronomical instruments; gallium arsenide; GaAs; Lange coupler; PHEMT process; W-band image reject mixer; astronomical observation system; broadband fundamental mixer; image rejection; size 0.15 mum; Couplers; Gain; Gallium arsenide; Loss measurement; Mixers; Power dividers; Radio frequency; ALMA(Atacama Large Millimeter/ sub-millimeter Array); Image reject mixer; MMIC; W band; pHEMT;
Conference_Titel :
Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-61284-754-2
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2011.5972668
