NDLI: High-performance 94-GHz single balanced mixer using 70-nm MHEMTs and surface micromachined technology

Content Provider	IEEE Xplore Digital Library
Author	Sung Chan Kim An, D. Byeong Ok Lim Tae Jong Baek Dong Hoon Shin Jin Koo Rhee
Copyright Year	1980
Abstract	We reported 94-GHz, low conversion loss, and high isolation single balanced active gate mixer based on 70-nm gate length InGaAs/InAlAs metamorphic high-electron mobility transistors (MHEMTs). This mixer showed that the conversion loss and isolation characteristics were 2.5/spl sim/3.5 dB and under -29 dB in the range of 92.95/spl sim/94.5 GHz, respectively. The low conversion loss of the mixer is mainly attributed to the high-performance of the MHEMTs exhibiting a maximum drain current density of 607 mA/mm, an extrinsic transconductance of 1015 mS/mm, a current gain cutoff frequency (f/sub t/) of 330 GHz, and a maximum oscillation frequency (f/sub max/) of 425 GHz. High isolation characteristics are due to hybrid ring coupler which adopted dielectric-supported air-gapped microstrip line structure using surface micromachined technology. To our knowledge, these results are the best performance demonstrated from 94 GHz single balanced mixer utilizing GaAs-based HEMTs in terms of conversion loss as well as isolation characteristics.
Sponsorship	IEEE Electron Devices Society
Starting Page	28
Ending Page	30
Page Count	3
File Size	441638
File Format	PDF
ISSN	07413106
Volume Number	27
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	mHEMTs Isolation technology HEMTs MODFETs Mixers Cutoff frequency Indium gallium arsenide Indium compounds Current density Transconductance 70-nm Dielectric-supported air-gapped microstrip line (DAML) hybrid ring coupler metamorphic high-electron mobility transistors (MHEMTs) single balanced mixer
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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