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Active load modules for W-band radiometer calibration

: Weissbrodt, E.; Tessmann, A.; Schlechtweg, M.; Kallfass, I.; Ambacher, O.


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Geoscience and Remote Sensing Society:
IGARSS 2012, IEEE International Geoscience and Remote Sensing Symposium : Remote sensing for a dynamic earth, 22-27 July 2012, Munich, Germany
Piscataway/NJ: IEEE, 2012
ISBN: 978-1-4673-1158-8
ISBN: 978-1-4673-1160-1 (Print)
ISBN: 978-1-4673-1159-5
International Geoscience and Remote Sensing Symposium (IGARSS) <2012, Munich>
Conference Paper
Fraunhofer IAF ()
active cold load; active hot load; ACL; AHL; radiometer; calibration; W-band; mHEMT; MMIC

An active cold load (ACL) and an active hot load (AHL) circuit were developed in W-band (75 - 110 GHz) and manufactured in IAF's metamorphic high electron mobility transistor (mHEMT) technology. The millimeter-wave monolithic integrated circuits (MMICs) were radiometricly characterized with a dedicated hot cold on wafer noise measurement setup and packaged into waveguide modules. The active load modules were then again characterized, to be used as reference loads in radiometry systems with switching front-ends [1].