Radiation quality factor of spherical antennas with material cores

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2011

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This paper gives a description of the radiation quality factor and resonances of spherical antennas with material cores. Conditions for cavity and radiating resonances are given, and a theoretical description of the radiation quality factor, as well as simple expressions describing the relative increase in quality factor due to the effect of the internally stored energy are given in special cases. For the air-core antenna of vanishing size, it is shown that the dipole modes are the modes providing the lowest quality factor of all modes. Finally an investigation of the effect of the core permeability and permittivity for an antenna of fixed electrical size is performed.
Original languageEnglish
TitleProceedings of the 5. European Conference on Antennas and Propagation
PublisherIEEE Computer Society Press
Publication date2011
ISBN (print)978-1-4577-0250-1
StatePublished

Conference

Conference5th European Conference on Antennas and Propagation
Number5
CountryItaly
CityRome
Period11/04/1115/04/11
Internet addresshttp://www.eucap2011.org/
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