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.


Electrical and Computer Engineering

Keywords and Phrases

Bessel Functions; Hankel Functions; Maxwell Equations; Neumann Functions; Q Factor; Computational Electromagnetics; Cylindrical Shield; Dielectric Hemisphere Dimensions; Dielectric Resonators; Field Distribution; Layered Resonator; Local Flat Reflectors; Radial-Mode Distribution; Shielded Hemispherical Dielectric Resonators; Whispering-Gallery Modes

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

File Type





© 2002 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 2002