Precision Calculations of the Characteristic Impedance of Complex Coaxial Waveguides Used in Wideband Thermal Converters of AC Voltage and Current

• Autorzy: Kubiczek Krzysztof , Kampik Marian

Identyfikatory

DOI

10.24425/ijet.2022.141270

• Języki publikacji: EN

Abstrakty

EN

The article presents precision and numerically stable method of calculation of the characteristic impedance of cylindrical multilayer waveguides used in high-precision wideband measuring instruments and standards, especially calculable thermal converters of AC voltage and precision wideband current shunts. Most of currently existing algorithms of characteristic impedance calculation of such waveguides are based upon approximations. Unfortunately, application of such methods is limited to waveguides composed of a specific, usually low number of layers. The accuracy of approximation methods as well as the number of layers is sometimes not sufficient, especially when the coaxial waveguide is a part of precision measurement equipment. The article presents the numerically stable matrix analytical formula using exponentially scaled modified Bessel functions to compute characteristic impedance and its components of the cylindrical coaxial multilayer waveguides. Results obtained with the developed method were compared with results of simulations made using the Finite Element Method (FEM) software simulations. Very good agreement between results of those two methods were achieved.

Słowa kluczowe

EN

AC voltage standard; current shunt; characteristic impedance; multilayer cylindrical conductor; FEM simulation; modified Bessel functions; numerical stability; calorimetric thermal voltage converter; ac-dc transfer difference

• Wydawca: Polish Academy of Sciences, Committee of Electronics and Telecommunication
• Czasopismo: International Journal of Electronics and Telecommunications
• Rocznik: 2022
• Tom: Vol. 68. No. 3
• Strony: 527--533
• Opis fizyczny: Bibliogr. 34 poz., schem., tab.

Twórcy

autor

Kubiczek Krzysztof

• Dept. of Measurement Science, Electronics and Control, Silesian University of Technology, Gliwice, Poland

autor

Kampik Marian

• Dept. of Measurement Science, Electronics and Control, Silesian University of Technology, Gliwice, Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).