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

In English

Författare

Summary, in English

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.

Publiceringsår

2007

Språk

Engelska

Sidor

75-79

Publikation/Tidskrift/Serie

[Host publication title missing]

Dokumenttyp

Konferensbidrag

Ämne

  • Electrical Engineering, Electronic Engineering, Information Engineering

Conference name

International Conference on Applied Electromagnetics and Communications

Conference date

2007-09-24 - 2007-09-26

Conference place

Dubrovnik, Croatia

Status

Published

Projekt

  • EIT_HSWC:Antenna MIMO antennas and channels

Forskningsgrupp

  • Electromagnetic theory

ISBN/ISSN/Övrigt

  • ISBN: 978-953-6037-50-6