Sub-20-K noise temperature LNA for 67–90 GHz frequency band
Abstract
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.
Additional Information
© 2017 IEEE. We would like to acknowledge I. Ramos, S. Padmanabhan, A. Tanner and T. Gaier for the measurement and analysis of the HRMR radiometer data. The research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. Research was partially funded from National Radio Astronomy Observatory (NRAO) ALMA Development.Attached Files
Published - 08059049.pdf
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Additional details
- Eprint ID
- 82442
- Resolver ID
- CaltechAUTHORS:20171018-074230547
- NASA/JPL/Caltech
- National Radio Astronomy Observatory
- Created
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2017-10-18Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field