Title :
W-band radiometer system with switching front-end for multi-load calibration
Author :
Weissbrodt, Ernst ; Kallfass, I. ; Hulsmann, A. ; Tessmann, A. ; Leuther, A. ; Massler, Hermann ; Ambacher, Oliver
Author_Institution :
Fraunhofer Inst. for Appl. Solid-State Phys. (IAF), Freiburg, Germany
Abstract :
A W-band Dicke type radiometer with an MMIC single pole-five-throw (SP5T) switch front-end and a Schottky diode detector is presented. The radiometer is intended to test active W-band loads as well as to generate passive millimeter wave imagery. By applying active or conventional hot and cold loads to the spare input ports of the SP5T, the radiometer can switch between the antenna, the external reference loads, and a monolithic integrated 50 Ω load. Hence, accurate radiometric multi-load calibration can be performed as well as standard Dicke operation.
Keywords :
Schottky diodes; calibration; microwave switches; millimetre wave detectors; radiometers; MMIC SP5T switch; MMIC single-pole-five-throw switch; Schottky diode detector; W-band Dicke type radiometer system; monolithic integrated load; passive millimeter wave imagery; radiometric multiload calibration; resistance 50 ohm; switching front-end; Calibration; Microwave radiometry; Millimeter wave technology; Noise; Switches; Temperature measurement; MMIC; W-band; active loads; calibration; direct detection; mHEMT; millimeter wave switch; radiometer;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2011 IEEE International
Conference_Location :
Vancouver, BC
Print_ISBN :
978-1-4577-1003-2
DOI :
10.1109/IGARSS.2011.6050069
