Du är här

Physical limitations on antennas of arbitrary shape

Publiceringsår: 2007
Språk: Engelska
Sidor: 2589-2607
Publikation/Tidskrift/Serie: Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volym: 463
Nummer: 2086
Dokumenttyp: Artikel

Sammanfattning

In this paper, physical limitations on bandwidth, realized gain, Q-factor and directivity are derived for antennas of arbitrary shape. The product of bandwidth and realizable gain is shown to be bounded from above by the eigenvalues of the long-wavelength, high-contrast polarizability dyadics. These dyadics are proportional to the antenna volume and are easily determined for an arbitrary geometry. Ellipsoidal antenna volumes are analysed in detail, and numerical results for some generic geometries are presented. The theory is verified against the classical Chu limitations for spherical geometries and shown to yield sharper bounds for the ratio of the directivity and the Q-factor for non-spherical geometries.

Disputation

Nyckelord

  • Physics and Astronomy

Övrigt

  • Swedish Foundation for Strategic Research (SSF)
  • Swedish Research Council
Published
  • EIT_HSWC:Antenna MIMO antennas and channels
Yes
  • Electromagnetic theory
  • ISSN: 1364-5021

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen

LERU logo U21 logo