Precise Measurement of Microwave Permittivity Based on the Electromagnetic Fields in a Cavity Resonator with Finite Conductivity Walls

Hiroyuki TANAKA; Akihiro TSUTSUMI

Precise Measurement of Microwave Permittivity Based on the Electromagnetic Fields in a Cavity Resonator with Finite Conductivity Walls

Hiroyuki TANAKA, Akihiro TSUTSUMI

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In this paper, we calculated resonant frequency and unloaded Q-factor for the TM_0i0 resonant mode excited in a cylindrical cavity composed of walls with finite conductivity and with a dielectric rod loaded coaxially along the central axis. Formulation for the calculation is made using the mode-matching method. Convergence of the calculation is checked. Values calculated by the present method for various combinations of dimensions, permittivity, and conductivity of the inner-components of cavity are compared with those calculated by a conventional method formulated using loss-less electromagnetic fields of cavity. Although the difference between the values calculated by those two methods is usually small, it is found that the difference increases as permittivity of dielectric rod increases and becomes about 10^-6 in reciprocal of unloaded Q-factor of the loaded cavity in a presented case.

Publication: IEICE TRANSACTIONS on Electronics Vol.E86-C No.12 pp.2387-2393

Publication Date: 2003/12/01

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Type of Manuscript: Special Section PAPER (Special Issue on Recent Trends on Microwave and Millimeter Wave Application Technology)

Category: Measurement

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Hiroyuki TANAKA, Akihiro TSUTSUMI, "Precise Measurement of Microwave Permittivity Based on the Electromagnetic Fields in a Cavity Resonator with Finite Conductivity Walls" in IEICE TRANSACTIONS on Electronics, vol. E86-C, no. 12, pp. 2387-2393, December 2003, doi: .
Abstract: In this paper, we calculated resonant frequency and unloaded Q-factor for the TM_0i0 resonant mode excited in a cylindrical cavity composed of walls with finite conductivity and with a dielectric rod loaded coaxially along the central axis. Formulation for the calculation is made using the mode-matching method. Convergence of the calculation is checked. Values calculated by the present method for various combinations of dimensions, permittivity, and conductivity of the inner-components of cavity are compared with those calculated by a conventional method formulated using loss-less electromagnetic fields of cavity. Although the difference between the values calculated by those two methods is usually small, it is found that the difference increases as permittivity of dielectric rod increases and becomes about 10^-6 in reciprocal of unloaded Q-factor of the loaded cavity in a presented case.
URL: https://globals.ieice.org/en_transactions/electronics/10.1587/e86-c_12_2387/_p

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@ARTICLE{e86-c_12_2387,
author={Hiroyuki TANAKA, Akihiro TSUTSUMI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Precise Measurement of Microwave Permittivity Based on the Electromagnetic Fields in a Cavity Resonator with Finite Conductivity Walls},
year={2003},
volume={E86-C},
number={12},
pages={2387-2393},
abstract={In this paper, we calculated resonant frequency and unloaded Q-factor for the TM_0i0 resonant mode excited in a cylindrical cavity composed of walls with finite conductivity and with a dielectric rod loaded coaxially along the central axis. Formulation for the calculation is made using the mode-matching method. Convergence of the calculation is checked. Values calculated by the present method for various combinations of dimensions, permittivity, and conductivity of the inner-components of cavity are compared with those calculated by a conventional method formulated using loss-less electromagnetic fields of cavity. Although the difference between the values calculated by those two methods is usually small, it is found that the difference increases as permittivity of dielectric rod increases and becomes about 10^-6 in reciprocal of unloaded Q-factor of the loaded cavity in a presented case.},
keywords={},
doi={},
ISSN={},
month={December},}

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TY - JOUR
TI - Precise Measurement of Microwave Permittivity Based on the Electromagnetic Fields in a Cavity Resonator with Finite Conductivity Walls
T2 - IEICE TRANSACTIONS on Electronics
SP - 2387
EP - 2393
AU - Hiroyuki TANAKA
AU - Akihiro TSUTSUMI
PY - 2003
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E86-C
IS - 12
JA - IEICE TRANSACTIONS on Electronics
Y1 - December 2003
AB - In this paper, we calculated resonant frequency and unloaded Q-factor for the TM_0i0 resonant mode excited in a cylindrical cavity composed of walls with finite conductivity and with a dielectric rod loaded coaxially along the central axis. Formulation for the calculation is made using the mode-matching method. Convergence of the calculation is checked. Values calculated by the present method for various combinations of dimensions, permittivity, and conductivity of the inner-components of cavity are compared with those calculated by a conventional method formulated using loss-less electromagnetic fields of cavity. Although the difference between the values calculated by those two methods is usually small, it is found that the difference increases as permittivity of dielectric rod increases and becomes about 10^-6 in reciprocal of unloaded Q-factor of the loaded cavity in a presented case.
ER -