Title :
A set of waveguide primary thermal noise standards and related calibration systems for the frequency range 8.2-40 GHz
Author_Institution :
BNM-LCIE, Fontenay-aux-Roses, France
Abstract :
The national metrology laboratory, BNM-LCIE, has developed, a set of four new waveguide primary thermal-noise standards for frequencies between 8.2 GHz and 40 GHz. The output noise power obtained by making temperature and attenuation measurements is within (948-1012) K/spl plusmn/(1.2-1.8) K (1 /spl sigma/). The standard-type uncertainty of 14-16 dB ENR sources calibrated with switching radiometers is less than 0.02 dB.
Keywords :
calibration; electric noise measurement; frequency response; microwave measurement; millimetre wave measurement; rectangular waveguides; thermal noise; transfer standards; 8.2 to 40 GHz; PID system; attenuation measurements; calibrated noise sources; calibration systems; frequency response; heater system; microwave absorber; output noise power; precision measurement; rectangular waveguide; standard-type uncertainty; temperature measurements; transfer noise sources; waveguide primary thermal noise standards; Acoustic reflection; Calibration; Electromagnetic heating; Electromagnetic waveguides; Frequency; IEC standards; Microwave ovens; Noise figure; Noise measurement; Temperature;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-5018-9
DOI :
10.1109/CPEM.1998.700106
