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Absorption efficiency and physical bounds on antennas

Publiceringsår: 2010
Språk: Engelska
Sidor: 20
Publikation/Tidskrift/Serie: Technical Report LUTEDX/(TEAT-7200)/1-20/(2010)
Dokumenttyp: Rapport
Ytterligare information: Published version: International Journal of Antennas and Propagation Volume 2010 (2010), Article ID 946746, 7 pages


The all spectrum absorption efficiency appears in the physical bounds on antennas expressed in the polarizability dyadics. Here, it is shown that this generalized absorption efficiency is close to $1/2$ for small idealized dipole antennas and for antennas with a dominant resonance in their absorption. Also, the usefulness of this parameter is analyzed for estimation of antenna performance. The results are illustrated with numerical data for several antennas.



  • Technology and Engineering


  • Electromagnetic theory

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