Cryogenic W-band LNA for ALMA band 2+3 with average noise temperature of 24 K
Paper in proceeding, 2017

A cryogenic low noise amplifier that operates across the E and W-bands, from 65 GHz to 116 GHz, has been developed using 0.1-?m InP HEMT technology. Such wideband performance makes this work suitable for the ALMA telescope where two of its bands, 67-90 GHz of Band 2 and 85-116 GHz of Band 3, can be combined into one. At an ambient temperature of 5.5 K, this W-band LNA demonstrates an average noise temperature of 24.7 K with more than 21 dB gain and +/-3.0 dB gain flatness from 65 GHz to 116 GHz. To the best knowledge of the authors, this combination of bandwidth, gain flatness and noise temperature has not been demonstrated before.


Low noise amplifier

Noise temperature







Yulung Tang

Low Noise Factory AB

Niklas Wadefalk

Low Noise Factory AB

J. Kooi

California Institute of Technology (Caltech)

Joel Schleeh

Low Noise Factory AB

Giuseppe Moschetti

Low Noise Factory AB

Per-Åke Nilsson

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Arsalan Pourkabirian

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Eunjung Cha

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Silvia Tuzi

Chalmers, Physics, Biological Physics

Jan Grahn

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

IEEE MTT-S International Microwave Symposium Digest

0149645X (ISSN)

176-179 8058981
978-1-5090-6360-4 (ISBN)

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering





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9/6/2018 1