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Extremely high-Q factor dielectric resonators for millimeter-wave applications

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5 Author(s)
Krupka, J. ; Inst. of Microelectron. & Optoelectron., Warsaw Univ. of Technol. ; Tobar, M.E. ; Hartnett, J.G. ; Cros, D.
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It has been proven, based on a rigorous electromagnetic analysis, that spherical TE10p-mode Bragg-reflection resonators exhibit many times higher Q factors than corresponding cylindrical TE01delta-mode dielectric resonators, dielectric whispering-gallery-mode resonators, or empty spherical TE10p-mode cavities. Rigorous equations have been derived that allow optimally designed Q-factor and "quarter-wavelength" reflector-multilayered-spherical Bragg-reflection resonators. Experiments have been performed on three-layer spherical resonators made of single-crystal YAG and single-crystal quartz. The unloaded Q factor for the TE012 mode in these resonators was 1.04times105 at 26.26 GHz for YAG and 6.4times104 at 27.63 GHz for quartz

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:53 ,  Issue: 2 )

Date of Publication:

Feb. 2005

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