Title :
New broadband thermal noise primary standard in coaxial technology
Author :
Fornet-Ruiz, Jaime ; Lozano-Guerrero, Antonio ; Monzó-Cabrera, Juan ; Díaz-Morcillo, Alejandro
Author_Institution :
Inst. Nac. de Tec. Aeroespacial (INTA), Spain
Abstract :
A broadband primary standard for thermal noise measurements is presented and its thermal and electromagnetic behavior is analyzed by means of analytical and numerical simulation techniques. It consists of a broadband termination connected to a 3.5mm coaxial airline partially immersed in liquid Nitrogen. The main innovative part of the device is the thermal bead between inner and outer conductors, designed for obtaining a proper thermal contact and to keep low both its contribution to the total thermal noise and its reflectivity. A sensitivity analysis is realized in order to fix the manufacturing tolerances for a proper performance in the range 10MHz-26.5GHz.
Keywords :
coaxial cables; conductors (electric); electric noise measurement; measurement standards; numerical analysis; sensitivity analysis; thermal noise; analytical simulation technique; broadband primary standard; broadband termination; coaxial airline; conductors; electromagnetic behavior; frequency 10 MHz to 26.5 GHz; numerical simulation technique; sensitivity analysis; size 3.5 mm; thermal bead; thermal behavior; thermal contact; thermal noise measurement; Conductors; Nitrogen; Noise; Reflection; Temperature; Thermal noise; Uncertainty; Thermal noise; broadband; coaxial line; metrology; metrology standard;
Conference_Titel :
Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-61284-754-2
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2011.5972675
