A L-band active cold noise source for radiometer calibration

For application in radiometer calibration, a L-band(1400-1430MHz) active cold noise source(ACNS) is designed. A hybrid circuit has been realized with a Pseudomorphic High Electron Mobility Transistor(pHEMT), lumped elements and microstrip transmission lines. At ambient temperature, the ACNS exhibits...

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Bibliographic Details
Published in2017 IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC) pp. 1 - 5
Main Authors Yongqiang Duan, ZhenZhan Wang
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2017
Subjects
ACNS
Calibration
L-band
Microwave radiometry
Noise measurement
noise temperature
radiometer
Temperature measurement
Temperature sensors
Transistors
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Summary:For application in radiometer calibration, a L-band(1400-1430MHz) active cold noise source(ACNS) is designed. A hybrid circuit has been realized with a Pseudomorphic High Electron Mobility Transistor(pHEMT), lumped elements and microstrip transmission lines. At ambient temperature, the ACNS exhibits an excellent noise temperature of only 68.7 K, a return loss higher than 25 dB and a negative temperature sensitivity of -1.64 K/O in the 1400-1430 MHz frequency range.
DOI:10.1109/ICSPCC.2017.8242389