Low-Q Electrically Small Spherical Magnetic Dipole Antennas

Oleksiy S. Kim

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Three novel electrically small antenna configurations radiating a TE10 spherical mode corresponding to a magnetic dipole are presented and investigated: multiarm spherical helix (MSH) antenna, spherical split ring resonator (S-SRR) antenna, and spherical split ring (SSR) antenna. All three antennas are self-resonant, with the input resistance tuned to 50 ohms by an excitation curved dipole/monopole. A prototype of the SSR antenna has been fabricated and measured, yielding results that are consistent with the numerical simulations. Radiation quality factors (Q) of these electrically small antennas (in all cases ka
Original languageEnglish
JournalI E E E Transactions on Antennas and Propagation
Issue number7
Pages (from-to)2210-2217
Publication statusPublished - 2010


  • quality factor
  • electrically small antennas
  • split-ring resonator (SRR)
  • Chu limit
  • magnetic dipole

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