Abstract
The stored energies, radiated power, and quality factor of a magnetic-dipole antenna, consisting of a spherical electrical surface current density enclosing a magnetic core, is obtained through direct spatial integration of the internally and externally radiated field expressed in terms of spherical vector waves. The obtained quality factor agrees with that of Wheeler and Thal 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.
| Original language | English |
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| Title of host publication | 2009 International Symposium on Antennas and Propagation (ISAP 2009) |
| Place of Publication | Bangkok, Thailand |
| Publication date | 2009 |
| Pages | 695-698 |
| ISBN (Print) | 978-974-235-465-7 |
| Publication status | Published - 2009 |
| Event | 2009 International Symposium on Antennas and Propagation - Bangkok, Thailand Duration: 20 Oct 2009 → 23 Oct 2009 |
Conference
| Conference | 2009 International Symposium on Antennas and Propagation |
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| Country/Territory | Thailand |
| City | Bangkok |
| Period | 20/10/2009 → 23/10/2009 |
Keywords
- quality factor
- Chu limit
- Electrically small antennas
- lower bound
- magnetic dipole