Cryogenic W-band LNA for ALMA band 2+3 with average noise temperature of 24 K

• 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.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Nyckelord

Cryogenic

Low noise amplifier

Noise temperature

ALMA

W-band

LNA

InP

MMIC

Publikations- och innehållstyp

kon (ämneskategori)

ref (ämneskategori)