Decreasing the radiation quality factor of magnetic dipole antennas by a magnetic-coated metal core

@article{Kim2010DecreasingTR,
  title={Decreasing the radiation quality factor of magnetic dipole antennas by a magnetic-coated metal core},
  author={Oleksiy S. Kim and Olav Breinbjerg},
  journal={2010 Conference Proceedings ICECom, 20th International Conference on Applied Electromagnetics and Communications},
  year={2010},
  pages={1-3}
}
To achieve the Chu lower bound for the radiation Q, an electrically small magnetic dipole antenna should not store any magnetic energy internally to the minimum sphere enclosing the antenna. As shown in our previous works, the internal stored magnetic energy can be reduced, although not entirely eliminated, by introducing a solid magnetic core inside the antenna. In this paper, using analytical results obtained though the vector spherical wave theory, we show that the internal stored magnetic… CONTINUE READING

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