Sub-20-K noise temperature LNA for 67-90 GHz frequency band

Pekka Kangaslahti, Kieran Cleary, Jacob Kooi, Lorene Samoska, Richard Lai, Michael Barsky, Xiaobing Mei, Stephen Sarkozy, Mikko Varonen

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

3 Citations (Scopus)


Indium Phosphide MMIC LNAs are enabling new capabilities in instrument development. The development of arrays of hundreds of cryogenically-cooled millimeter wave receivers has previously been challenging, but is now achievable with highly repeatable MMIC processes and advances in cryogenic on-wafer testing of LNAs. We have developed InP HEMT LNA MMICs for the 67-90 GHz frequency band that is the last missing receiver system from the ALMA. These MMICs provided average performance of less than 22.5 K noise temperature over the frequency band and minimum noise temperature of 17.5 K at 72 GHz. These LNAs achieve NT=220K (NF=2.4dB) at 90 GHz for Earth remote sensing instrument on Sentinel-6. Our HRMR (High Resolution Microwave Radiometer) achieves NEDT < 0.05K enabling Sentinel-6 to measure coastal ocean topography at 3 km resolution with better than 1 cm accuracy.

Original languageEnglish
Title of host publication2017 IEEE MTT-S International Microwave Symposium, IMS 2017
Number of pages4
ISBN (Electronic)9781509063604
Publication statusPublished - 4 Oct 2017
MoE publication typeA4 Article in a conference publication
EventIEEE MTT-S International Microwave Symposium - Honololu, United States
Duration: 4 Jun 20179 Jun 2017

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
ISSN (Print)0149-645X


ConferenceIEEE MTT-S International Microwave Symposium
Abbreviated titleIMS
Country/TerritoryUnited States


  • ALMA
  • Cryogenic
  • InP
  • LNA
  • MMIC
  • Ocean topography
  • Sentinel-6


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