Input Impedance of Coaxial Line Terminated With a Complex Gap Capacitance - Numerical and Experimental Analysis

Published

April 1, 2004

Author(s)

Jan Obrzut, A Anopchenko

Abstract

The scattering parameters, input impedance and the spatial distribution of the electromagnetic field have been obtained in the frequency range of 100 MHz to 20 GHz for specimens 8 mm to 320 mm thick, with a the dielectric constant of up to 70. It was found that the residual inductance of the specimen affects the impedance characteristic of the network that results in the LC resonance coupled with the cavity resonance. The specimen inductance is linearly dependent on the specimen thickness. At frequencies near the cavity resonance, the specimen section can be treated as a network of a transmission line with capacitance, where the fundamental mode propagates along the diameter of the specimen. The results are useful in improving accuracy of broadband dielectric measurements in extended frequency range of thin films with high dielectric constant that are of interest to bio-and nano-technology.

Citation

IEEE Transactions on Instrumentation and Measurement

Volume

53

Issue

No. 4

Pub Type

Journals

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Keywords

coaxial discontinuity, dielectric materials, full wave analysis, high frequency electromagnetic simula, high frequency measurements

Citation

Obrzut, J. and Anopchenko, A. (2004), Input Impedance of Coaxial Line Terminated With a Complex Gap Capacitance - Numerical and Experimental Analysis, IEEE Transactions on Instrumentation and Measurement, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852840 (Accessed May 3, 2026)

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