Whispering-Gallery Modes in Shielded Hemispherical Dielectric Resonators

Sergey Kharkovsky, Missouri University of Science and Technology
Z. E. Eremenko
V. V. Kutuzov
A. E. Kogut
Yuri F. Filipov

This document has been relocated to http://scholarsmine.mst.edu/ele_comeng_facwork/1939

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The results of the numerical and experimental investigations of whispering-gallery (WG) modes in shielded hemispherical dielectric resonators are presented in this paper. It is shown that the Q factor of WG modes in the shielded resonator can be ten times much higher than the Q factor of the similar open hemispherical dielectric-resonator modes. Shielding the resonator can decrease the dimensions of both the dielectric hemisphere and resonator as a whole, saving the high-Q factor of WG modes. The usage of a cylindrical shield and local flat reflectors in the experiment provides the investigation of the high-Q factor of WG modes in the resonator.