Physical bounds on the antenna scattering matrix
(2008) IEEE AntennasandPropagationSociety International Symposium, 2008 p.42464249 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 nearfield 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 nearfield 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 Qfactor through the stored energy, the lowfrequency 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 lowfrequency 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:
http://lup.lub.lu.se/record/1054398
 author
 Gustafsson, Mats ^{LU} ; Sohl, Christian ^{LU} and Nordebo, Sven ^{LU}
 organization
 publishing date
 2008
 type
 Contribution to conference
 publication status
 published
 subject
 keywords
 sum rule, spherical vector wave, Physical bounds, MIMO
 pages
 4246  4249
 conference name
 IEEE AntennasandPropagationSociety International Symposium, 2008
 external identifiers

 WOS:000261440602291
 Scopus:55649099632
 language
 English
 LU publication?
 yes
 id
 145658c51b8c40b7afb816b086c0097b (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
 20080403 13:58:51
 date last changed
 20161013 04:58:15
@misc{145658c51b8c40b7afb816b086c0097b, 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 nearfield 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 Qfactor through the stored energy, the lowfrequency 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 lowfrequency 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 = {42464249}, title = {Physical bounds on the antenna scattering matrix}, year = {2008}, }