Title :
Evaluation of a cryogenic coaxial noise source based on the calibration method by single auxiliary transmission line
Author :
Iida, H. ; Shimada, Y. ; Komiyama, K.
Author_Institution :
Nat. Inst. of Adv. Ind. Sci. & Technol., Nat. Metrol. Inst. of Japan, Tsukuba, Japan
Abstract :
A method to estimate the noise temperature of a noise source by using an auxiliary transmission line (ATL) is proposed and discussed. A cryogenic 7-mm coaxial noise source is developed for verifying the ATL method. The noise temperature is determined from the parameters directly measured by a radiometer and the available power ratio of the transmission line measured by a vector network analyzer using the ATL. The experimental results in the frequency range of 8-12 GHz show a validity of the method for determining noise temperature.
Keywords :
calibration; cryogenics; network analysers; noise measurement; transmission lines; calibration; cryogenic coaxial noise source; frequency 8 GHz to 12 GHz; noise temperature; single auxiliary transmission line; size 7 mm; vector network analyzer; Calibration; Coaxial components; Cryogenics; Noise measurement; Power measurement; Power transmission lines; Signal to noise ratio; Temperature; Transmission line measurements; Transmission lines;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2010 Conference on
Conference_Location :
Daejeon
Print_ISBN :
978-1-4244-6795-2
DOI :
10.1109/CPEM.2010.5544006
