## Electrical properties of spherical dipole antennas with lossy material cores

Publication: Research - peer-review › Article in proceedings – Annual report year: 2012

### Standard

**Electrical properties of spherical dipole antennas with lossy material cores.** / Hansen, Troels Vejle; Kim, Oleksiy S.; Breinbjerg, Olav.

Publication: Research - peer-review › Article in proceedings – Annual report year: 2012

### Harvard

*2012 6th European Conference on Antennas and Propagation.*IEEE, pp. 2474 - 2478 . DOI: 10.1109/EuCAP.2012.6206365

### APA

*2012 6th European Conference on Antennas and Propagation.*(pp. 2474 - 2478 ). IEEE. DOI: 10.1109/EuCAP.2012.6206365

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*2012 6th European Conference on Antennas and Propagation.*IEEE. 2012. 2474 - 2478 . Available: 10.1109/EuCAP.2012.6206365

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### Bibtex

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### RIS

TY - GEN

T1 - Electrical properties of spherical dipole antennas with lossy material cores

AU - Hansen,Troels Vejle

AU - Kim,Oleksiy S.

AU - Breinbjerg,Olav

PY - 2012

Y1 - 2012

N2 - A spherical magnetic dipole antenna with a linear, isotropic, homogenous, passive, and lossy material core is modeled analytically, and closed form expressions are given for the internally stored magnetic and electric energies, the radiation efficiency, and radiation quality factor. This model and all the provided expressions are exact and valid for arbitrary core sizes, permeability, permittivity, electric and magnetic loss tangents. Arbitrary dispersion models for both permeability and permittivity can be applied. In addition, we present an investigation for an antenna of fixed electrical size and permittivity, focusing on the effects of magnetic core losses for a simple magnetic dispersion model, to illustrate how stored energies, efficiency and quality factor are affected. This shows that large magnetic losses can be beneficial, as these can produce a relatively high efficiency.

AB - A spherical magnetic dipole antenna with a linear, isotropic, homogenous, passive, and lossy material core is modeled analytically, and closed form expressions are given for the internally stored magnetic and electric energies, the radiation efficiency, and radiation quality factor. This model and all the provided expressions are exact and valid for arbitrary core sizes, permeability, permittivity, electric and magnetic loss tangents. Arbitrary dispersion models for both permeability and permittivity can be applied. In addition, we present an investigation for an antenna of fixed electrical size and permittivity, focusing on the effects of magnetic core losses for a simple magnetic dispersion model, to illustrate how stored energies, efficiency and quality factor are affected. This shows that large magnetic losses can be beneficial, as these can produce a relatively high efficiency.

U2 - 10.1109/EuCAP.2012.6206365

DO - 10.1109/EuCAP.2012.6206365

M3 - Article in proceedings

SN - 978-1-4577-0918-0

SP - 2474

EP - 2478

BT - 2012 6th European Conference on Antennas and Propagation

PB - IEEE

ER -