Electric Dipole Antennas With Magnetic-Coated PEC Cores: Reaching the Chu Lower Bound on Q

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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The radiation properties of spherical electric dipole antennas with electric current excitation and material-coated perfectly electrically conducting (PEC) cores are investigated analytically using vector spherical wave functions. Closed-form expressions for electric and magnetic stored energy as well as the radiation quality factor $Q$ are derived. Using these, it is shown that properly selected magnetic coating and radius of the PEC core vastly reduce the internal stored energy, and thus make the $Q$ of an electric dipole antenna approach the Chu lower bound.
Original languageEnglish
JournalI E E E Transactions on Antennas and Propagation
Publication date2012
Volume60
Issue3
Pages1616-1619
ISSN0018-926X
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 3
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