Advanced

Physical bounds on the antenna scattering matrix

Gustafsson, Mats LU ; Sohl, Christian LU and Nordebo, Sven LU (2008) IEEE Antennas-and-Propagation-Society International Symposium, 2008 p.4246-4249
Abstract
The antenna scattering matrix is based on a spherical vector wave expansion and contains a complete description of the matching, transmission, receiving, and scattering properties of an antenna. It is commonly utilized in near-field measurements and it can also be used to model MIMO antennas. Here, an approach based on the holomorphic properties of the antenna scattering matrix is used to derive physical bounds on the bandwidth of lossless antennas. The resulting bounds are expressed in the radius of the smallest circumscribing sphere and the polarizability dyadics of the antenna. The derivation and final results resemble both the classical work by Chu (1948) and a recently developed theory based on the forward scattering. However, instead... (More)
The antenna scattering matrix is based on a spherical vector wave expansion and contains a complete description of the matching, transmission, receiving, and scattering properties of an antenna. It is commonly utilized in near-field measurements and it can also be used to model MIMO antennas. Here, an approach based on the holomorphic properties of the antenna scattering matrix is used to derive physical bounds on the bandwidth of lossless antennas. The resulting bounds are expressed in the radius of the smallest circumscribing sphere and the polarizability dyadics of the antenna. The derivation and final results resemble both the classical work by Chu (1948) and a recently developed theory based on the forward scattering. However, instead of estimating the Q-factor through the stored energy, the low-frequency expansion of the scattering matrix is used to obtain a set of summation rules from which bounds on the bandwidth are derived. The use of Cauchy integrals and the low-frequency expansion in terms of the polarizability dyadics are similar with the approach in (Chu, 1948 and Gustafsson et al., 2007). (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to conference
publication status
published
subject
keywords
sum rule, spherical vector wave, Physical bounds, MIMO
pages
4246 - 4249
conference name
IEEE Antennas-and-Propagation-Society International Symposium, 2008
external identifiers
  • WOS:000261440602291
  • Scopus:55649099632
language
English
LU publication?
yes
id
145658c5-1b8c-40b7-afb8-16b086c0097b (old id 1054398)
alternative location
http://ieeexplore.ieee.org/search/srchabstract.jsp?arnumber=4619981&isnumber=4618896&punumber=4604650&k2dockey=4619981@ieeecnfs&query=(sohl+%3Cin%3E+metadata)+%3Cand%3E+(4618896+%3Cin%3E+isnumber)&pos=3&access=no
date added to LUP
2008-04-03 13:58:51
date last changed
2016-10-13 04:58:15
@misc{145658c5-1b8c-40b7-afb8-16b086c0097b,
  abstract     = {The antenna scattering matrix is based on a spherical vector wave expansion and contains a complete description of the matching, transmission, receiving, and scattering properties of an antenna. It is commonly utilized in near-field measurements and it can also be used to model MIMO antennas. Here, an approach based on the holomorphic properties of the antenna scattering matrix is used to derive physical bounds on the bandwidth of lossless antennas. The resulting bounds are expressed in the radius of the smallest circumscribing sphere and the polarizability dyadics of the antenna. The derivation and final results resemble both the classical work by Chu (1948) and a recently developed theory based on the forward scattering. However, instead of estimating the Q-factor through the stored energy, the low-frequency expansion of the scattering matrix is used to obtain a set of summation rules from which bounds on the bandwidth are derived. The use of Cauchy integrals and the low-frequency expansion in terms of the polarizability dyadics are similar with the approach in (Chu, 1948 and Gustafsson et al., 2007).},
  author       = {Gustafsson, Mats and Sohl, Christian and Nordebo, Sven},
  keyword      = {sum rule,spherical vector wave,Physical bounds,MIMO},
  language     = {eng},
  pages        = {4246--4249},
  title        = {Physical bounds on the antenna scattering matrix},
  year         = {2008},
}