Title :
Highly integrated switching calibration front-end MMIC with active loads for w-band radiometers
Author :
Weissbrodt, Ernst ; Leuther, A. ; Schlechtweg, Michael ; Kallfass, I. ; Ambacher, Oliver
Author_Institution :
Fraunhofer Inst. for Appl. Solid State Phys. (IAF), Freiburg, Germany
Abstract :
A millimeter-wave monolithic integrated circuit (MMIC) consisting of a W-band (75 - 100 GHz) single-pole-five-throw (SP5T) switch and multiple internal active and passive loads for radiometer calibration was designed and manufactured in a low noise 50 nm GaAs mHEMT technology. This highly compact and integrated front-end device for radiometer systems is capable of fast ultra-fast switching between two identical input ports (e.g. for polarimetric applications) and three internal calibration references. It allows an accurate multi-load calibration with noise temperatures between 220 K and 1750 K at the output of the device. Compared to conventional calibration methods this marks a substantial advantage in terms of size, mass, power consumption, complexity and repetition rate.
Keywords :
HEMT integrated circuits; III-V semiconductors; calibration; field effect MIMIC; gallium arsenide; microwave switches; radiometers; GaAs; active loads; frequency 75 GHz to 100 GHz; integrated switching calibration front-end MMIC; internal calibration references; mHEMT technology; millimeter wave monolithic integrated circuit; multiload calibration; passive loads; radiometer calibration; single-pole-five-throw switch; size 50 mm; temperature 220 K to 1750 K; Calibration; MMICs; Noise; Radiometers; Switches; Temperature measurement; Transistors; ACL; AHL; FET-switch; GaAs; MMIC; SCFE; SP5T; W-band; active loads; calibration; mHEMT; radiometer;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2012 7th European
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4673-2302-4
Electronic_ISBN :
978-2-87487-026-2
