Article | GigaHertz 2003. Proceedings from the Seventh Symposium | Characterisation of Metamorphic HEMTs for low-noise wideband amplifiers

Title:
Characterisation of Metamorphic HEMTs for low-noise wideband amplifiers
Author:
Karine Enze: Chalmers University of Technology, Microwave Electronics Laboratory, Sweden Jan Grahn: Chalmers University of Technology, Microwave Electronics Laboratory, Sweden Anders Mellberg: Chalmers University of Technology, Microwave Electronics Laboratory, Sweden Herbert Zirath: Chalmers University of Technology, Microwave Electronics Laboratory, Sweden Niklas Rorsman: Chalmers University of Technology, Microwave Electronics Laboratory, Sweden
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Year:
2003
Conference:
GigaHertz 2003. Proceedings from the Seventh Symposium
Issue:
008
Article no.:
062
No. of pages:
4
Publication type:
Poster
Published:
2003-11-06
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press; Linköpings universitet


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Metamorphic HEMTs developed by OMMIC have been DC- and RF-characterized. An extrinsic DC transconductance of 770 mS/mm was obtained for a 4x25µm MHEMT. Typical extrinsic unity current cut-off frequency; fT; was 140 GHz with a maximum oscillation frequency of 196 GHz. Broadband three-stage amplifiers utilizing these transistors were designed fabricated and characterized for various frequency bandwidths up to 90 GHz. For the 26-43 GHz bandwidth; the amplifier exhibited a gain of typically 25 dB and a return loss less than 5 db.

GigaHertz 2003. Proceedings from the Seventh Symposium

Author:
Karine Enze, Jan Grahn, Anders Mellberg, Herbert Zirath, Niklas Rorsman
Title:
Characterisation of Metamorphic HEMTs for low-noise wideband amplifiers
References:

[1] OMMIC homepage http://www.ommic.com


[2] Peter H Ladbroke;’MMIC Design:GaAs FETs and HEMTs’; ISBN 0-89006-314-1; Artech House; 1989.


[3] N Ono; K Onodera; K Arai; K Yamaguchi; Y Iseki;’K-band Monolithic GaAs HEMT Driver Amplifiers’; Proceedings of 2002 Asia Pacific Microwave Conference; pp. 1390-1392.

GigaHertz 2003. Proceedings from the Seventh Symposium

Author:
Karine Enze, Jan Grahn, Anders Mellberg, Herbert Zirath, Niklas Rorsman
Title:
Characterisation of Metamorphic HEMTs for low-noise wideband amplifiers
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