Title :
SiGe HBT-Based Active Cold Load for Radiometer Calibration
Author :
Leynia de la Jarrige, E. ; Escotte, L. ; Goutoule, J.M. ; Gonneau, E. ; Rayssac, J.
Author_Institution :
CNRS, Univ. of Toulouse, Toulouse, France
fDate :
4/1/2010 12:00:00 AM
Abstract :
An active cold load (ACL) using SiGe heterojunction bipolar transistor (HBT) has been realized at L-band for radiometer calibration. A hybrid circuit has been realized with a discrete transistor, lumped elements and microstrip transmission lines. The ACL exhibits return loss higher than 30 dB and a noise temperature less than 65 K in the L- band (1400-1427 MHz). The ambient temperature sensitivity is less than 0.3 K/??C.
Keywords :
Ge-Si alloys; calibration; heterojunction bipolar transistors; microstrip components; radiometers; HBT-based active cold load; L-band; SiGe; discrete transistor; frequency 1400 MHz to 1427 MHz; heterojunction bipolar transistor; hybrid circuit; lumped elements; microstrip transmission lines; noise temperature; radiometer calibration; Active cold load (ACL); SiGe heterojunction bipolar transistor (HBT); noise temperature; radiometer;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2010.2042564
