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Physical limitations on antennas: isoperimetric inequalities and the effect of metamaterials

Publiceringsår: 2007
Språk: Engelska
Sidor: 75-79
Publikation/Tidskrift/Serie: [Host publication title missing]
Dokumenttyp: Konferensbidrag


In this paper, physical limitations on antennas are presented based on the holomorphic properties of the forward scattering dyadic. As a direct consequence of causality and energy conservation, a forward dispersion relation for the extinction cross section is established, and isoperimetric inequalities for the partial realized gain and partial directivity are derived for antennas of

arbitrary shape. Closed-form expressions for the prolate and oblate spheroids are compared with Chu's classical result for the sphere, and the effect of invoking metamaterials in the antenna design is discussed. The theory is illustrated by numerical simulations of a monopole antenna with a finite ground plane.


  • Electrical Engineering, Electronic Engineering, Information Engineering


International Conference on Applied Electromagnetics and Communications
  • EIT_HSWC:Antenna MIMO antennas and channels
  • Electromagnetic theory-lup-obsolete
  • ISBN: 978-953-6037-50-6

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