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Active load modules for W-band radiometer calibration

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

DOI: 10.1109/IGARSS.2012.6350708

	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 pp.2945-2948
	International Geoscience and Remote Sensing Symposium (IGARSS) <2012, Munich>

	English
	Conference Paper
	Fraunhofer IAF ()
	active cold load; active hot load; ACL; AHL; radiometer; calibration; W-band; mHEMT; MMIC

Abstract
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].

: http://publica.fraunhofer.de/documents/N-212496.html