Eur. Phys. J. AP
Volume 9, Number 1, January 2000
|Page(s)||63 - 68|
|Published online||15 January 2000|
Temperature control by microwave radiometry with narrow bandwidth*
Département Hyperfréquences et Semi-Conducteurs, IEMN (UMR CNRS 8520),
avenue Poincaré, B.P. 69, Cité Scientifique, 59652 Villeneuve d'Ascq Cedex, France
Corresponding author: luc.Dubois@iemn.univ-Lille1.fr
Revised: 25 November 1999
Accepted: 25 November 1999
Published online: 15 January 2000
Temperature is an important parameter for industrial process control. With the usual methods we obtain only an invasive or superficial information about temperature. Microwave radiometry is a non-invasive way to determine the temperature within dissipative body. This paper presents the design of a new radiometer. With this system, the radiometric temperature is independent of the reflection coefficient of the sensor. A simplified calibration takes into account insertion losses of the microwave elements and the frequency bandwidth has been greatly reduced to eliminate the unwanted electromagnetic noise.
PACS: 07.07.Hj – Display and recording equipment, oscilloscopes, TV cameras, etc. / 07.20.Dt – Thermometry / 07.57.Kp – Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors
© EDP Sciences, 2000
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