Whispering-gallery modes in shielded hemispherical dielectric resonators

Author

Eremenko, Zoya E. ; Filipov, Yury F. ; Kharkovsky, Sergey N. ; Kutuzov, Vladimir V. ; Kogut, Alexander E.

Author_Institution

Usikov Inst. for Radio-Phys. & Electron., Acad. of Sci., Kharkov, Ukraine

Volume

50

Issue

11

fYear

2002

fDate

11/1/2002 12:00:00 AM

Firstpage

2647

Lastpage

2649

Abstract

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.

Keywords

Bessel functions; Maxwell equations; Q-factor; computational electromagnetics; dielectric resonators; Bessel functions; Hankel functions; Maxwell equations; Neumann functions; Q factor; cylindrical shield; dielectric hemisphere dimensions; field distribution; layered resonator; local flat reflectors; radial-mode distribution; shielded hemispherical dielectric resonators; whispering-gallery modes; Dielectric losses; Laser modes; Microwave devices; Millimeter wave technology; Optical resonators; Optical sensors; Permittivity; Resonant frequency; Tellurium; Whispering gallery modes;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2002.804627

Filename

1046042