Summary
International Symposium on Antennas and Propagation
2009
Session Number:2F2
Session:
Number:2F2-1
Minimum Q Electrically Small Spherical Magnetic Dipole Antenna - Theory
Olav Breinbjerg, Oleksiy S. Kim,
pp.695-698
Publication Date:2009/10/21
Online ISSN:2188-5079
Summary:
The stored energies, radiated power, and quality factor of a magnetic-dipole antenna with a magnetic core have been obtained through direct spatial integration of the internally and externally radiated field expressed in terms of spherical vector waves. The quality factor (9) agrees with that of Wheeler and Thal (2) for vanishing free-space electric radius but holds also for larger radii and facilitates the optimal choice of permeability in the presence of the resonances.