Journal article
Lower Bound for the Radiation $Q$ of Electrically Small Magnetic Dipole Antennas With Solid Magnetodielectric Core
A new lower bound for the radiation $Q$ of electrically small spherical magnetic dipole antennas with solid magnetodielectric core is derived in closed form using the exact theory. The new bound approaches the Chu lower bound from above as the antenna electrical size decreases. For $ka, the new bound is lower than the bounds for spherical magnetic as well as electric dipole antennas composed of impressed electric currents in free space.
| Language: | English |
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| Publisher: | IEEE |
| Year: | 2011 |
| Pages: | 679-681 |
| ISSN: | 15582221 and 0018926x |
| Types: | Journal article |
| DOI: | 10.1109/TAP.2010.2096394 |
| ORCIDs: | Kim, Oleksiy S. and Breinbjerg, Olav |
Chu lower bound Electrically small antennas Fundamental limitations Magnetic dipole Quality factor
Dipole antennas Magnetic cores Magnetic resonance Magnetic resonance imaging Permeability Q factor antenna radiation patterns dipole antennas electric currents electrically small antennas electrically small spherical magnetic dipole antennas exact theory fundamental limitations magnetic dipole quality factor solid magnetodielectric core
