Title :
Evaluation of uncertainty due to excess heating by an adiabatic line in calorimetric measurement of RF power
Author_Institution :
Electrotech. Lab., Ibaraki, Japan
Abstract :
We are developing two broadband RF power standards. One is based on 7 mm coaxial line with APC 7 connector for 10 MHz-18 GHz and the other is based on 2.9 mm coaxial line with K connector for 10 MHz-40 GHz. The power measurement principle is calorimetric isothermal control. In these measurements, the effect of excess heating by the adiabatic line becomes important. In the present work, its evaluation method is presented and experimental results are described.
Keywords :
Calibration; Calorimetry; Coaxial cables; Heat losses; Measurement standards; Measurement uncertainty; Microwave measurement; Power measurement; Power meters; 10 MHz to 18 GHz; 10 MHz to 40 GHz; 2.9 mm; 7 mm; RF load reflection coefficient; adiabatic line; broadband RF power standards; calorimetric isothermal control; calorimetric measurement; excess heating; heat loss ratio; loss ratio measurement; power measurement principle; power meter calibration system; uncertainty evaluation; Calibration; Coaxial components; Connectors; Frequency measurement; Heating; Isothermal processes; Loss measurement; Power measurement; Radio frequency; Temperature control;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2000 Conference on
Conference_Location :
Sydney, NSW, Australia
Print_ISBN :
0-7803-5744-2
DOI :
10.1109/CPEM.2000.850929
