Title :
Design, Construction, and Performance Evaluation of a Cryogenic 7-mm Coaxial Noise Standard
Author :
Kang, Tae-Weon ; Kim, Jeong-Hwan ; Yurchuk, Eduard F. ; Park, Jeong-I ; Sargsyan, Melik V. ; Arsaev, Igor E. ; Ouzdin, Rinadii I.
Author_Institution :
Electromagn. Metrol. Group, Korea Res. Inst. of Stand. & Sci., Daejeon
fDate :
4/1/2007 12:00:00 AM
Abstract :
A cryogenic 7-mm coaxial noise standard at 77.35 K has been designed and constructed. A ferrite composite-matched termination was used as a thermal noise source in the frequency range of 4.5-18 GHz. The noise temperature of the noise standard has been determined by measuring the temperature distribution and attenuation constant of a thermally isolated coaxial line and the attenuation of the output connector. The effective noise temperature has been evaluated to be 84.07-92.21 K with an uncertainty of 1.26-1.67 K (k = 2)
Keywords :
coaxial cables; cryogenic electronics; measurement standards; microwave measurement; noise measurement; temperature distribution; 4.5 to 18 GHz; 77.35 K; 84.07 to 92.21 K; attenuation constant; cryogenic 7-mm coaxial noise standard; ferrite composite-matched termination; performance evaluation; temperature distribution; thermal noise source; thermally isolated coaxial line; Attenuation measurement; Coaxial components; Connectors; Cryogenics; Ferrites; Frequency; Measurement standards; Noise measurement; Temperature distribution; Temperature measurement; Cryogenic noise standard; noise temperature; thermal noise;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2007.891132
