Radially two-layered quasi-optical dielectric resonators with ethyl alcohol and water

Cherpak, N. T.; Barannik, A. A.; Prokopenko, Yuriy; Shaforost, Elena N.; Shipilova, I.A.; Filipov, Yu.F.

doi:10.1109/eumc.2005.1610151

Cited by 4 publications

(2 citation statements)

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“…Recently a new approach to ε measurement of liquids has been proposed. It allows one to carry out direct measurements of properties of liquids with a high loss in the millimetre wavelength range [15,16]. The technique is based on the use of dielectric resonators in the form of a layered cylindrical disc excited on WGM.…”

Section: Introductionmentioning

confidence: 99%

“…Here a dielectric disc is sandwiched between conducting endplates (CEP) and the inner layer is a liquid under test [15]. Such resonator geometry allows both rigorous solution to an electrodynamic problem using the Maxwell equations and corresponding boundary conditions and is convenient for practical realization in the form of a measuring cell [16]. The dielectric resonators in which WGM are excited are, in fact, quasi-optical devices.…”

Section: Introductionmentioning

confidence: 99%

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Two-layered disc quasi-optical dielectric resonators: electrodynamics and application perspectives for complex permittivity measurements of lossy liquids

Barannik¹,

Cherpak²,

Prokopenko³

et al. 2007

Meas. Sci. Technol.

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Electromagnetic properties of novel quasi-optical resonators are studied theoretically and experimentally. The resonators are a radially two-layered dielectric disc sandwiched between conducting endplates. The internal layer can be filled with air or lossy liquid. Whispering gallery modes are excited in such a resonator and the mode energy is concentrated near the inner side of the cylindrical surface of an external layer. The measurement data obtained in the K a-band are compared with theoretical calculations of eigenfrequencies and quality factors of the Teflon resonator filled with water, ethyl alcohol, benzene and aqueous solutions of ethyl alcohol. A number of 'anomalous' properties of the resonator can be described using Maxwell equations. The experimental data on the complex permittivity of a binary mixture water-ethyl alcohol are compared with the values calculated in terms of Debye's function. An important feature of the proposed technique is that it holds promise for making first principle microwave measurements of the permittivity of lossy liquids.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%