TITLE:
Measurable Dielectric Permittivity Range for TE and TM Modes in a Shielded Dielectric Resonator
AUTHORS:
Eduardo Javier Paez, Roberto Cessare Callarotti, Yuande Sanchez
KEYWORDS:
Dielectric Resonator, Hertzian Potential, Cylindrical Cavity, Electromagnetic Characterization, Dielectric Permittivity Constant Measurement
JOURNAL NAME:
Journal of Electromagnetic Analysis and Applications,
Vol.7 No.6,
June
18,
2015
ABSTRACT: Dielectric resonator methods constitute one of the most useful techniques for the measurement of
electromagnetic material properties in the microwave frequency range. Several geometric configurations
are used for this purpose and, in the present paper, we consider the case of a dielectric
rod enclosed in a cylindrical metallic enclosure. To carry out dielectric measurements in this system
it is necessary to know the highest permittivity constant value for which the resonance condition
still can be attained into the cavity. Using an approach based on magnetic and electric Hertzian
potentials we have derived the set of TE and TM modes for the relevant geometry described
and, then we have calculated the valid dielectric permittivity constant range of measurements for
low-loss materials in a cylindrical cavity using a simple resonance frequency condition. Finally, we
present a simple application of this method in order to determine the dielectric permittivity constant
of heavy oil with 11 API.