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Coherent effects in single scattering and random errors in antenna technology

Sjöberg, Daniel LU (2005) In Progress in Electromagnetics Research-Pier 50. p.13-39
Abstract
Lack of knowledge prevents us from exactly calculating the behavior of electromagnetic fields. We study two extremes in this respect: scattering against randomly distributed particles ( no idea of the position or orientation of the scatterers), and random errors in antenna technology ( small deviations from what we think are the proper parameters). Random variables are used to model our lack of knowledge, and far field expressions are studied. Using the concept of characteristic functions from probability theory, results for arbitrary probability distributions are obtained. We explain an anomaly in the forward scattering direction in single scattering theory, present simple formulas for the directivity, side lobe level, and beam efficiency... (More)
Lack of knowledge prevents us from exactly calculating the behavior of electromagnetic fields. We study two extremes in this respect: scattering against randomly distributed particles ( no idea of the position or orientation of the scatterers), and random errors in antenna technology ( small deviations from what we think are the proper parameters). Random variables are used to model our lack of knowledge, and far field expressions are studied. Using the concept of characteristic functions from probability theory, results for arbitrary probability distributions are obtained. We explain an anomaly in the forward scattering direction in single scattering theory, present simple formulas for the directivity, side lobe level, and beam efficiency for a general array antenna with random errors, and a simple formula for the scattering coefficient from a general frequency selective structure with random errors. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Progress in Electromagnetics Research-Pier
volume
50
pages
13 - 39
publisher
EMW Publishing
external identifiers
  • wos:000239278400002
  • scopus:33947113637
ISSN
1070-4698
DOI
10.2528/PIER04050401
language
English
LU publication?
yes
id
f5c3095a-6298-499f-9418-97e2e9430b0c (old id 399353)
date added to LUP
2007-08-08 09:03:23
date last changed
2017-01-01 04:29:36
@article{f5c3095a-6298-499f-9418-97e2e9430b0c,
  abstract     = {Lack of knowledge prevents us from exactly calculating the behavior of electromagnetic fields. We study two extremes in this respect: scattering against randomly distributed particles ( no idea of the position or orientation of the scatterers), and random errors in antenna technology ( small deviations from what we think are the proper parameters). Random variables are used to model our lack of knowledge, and far field expressions are studied. Using the concept of characteristic functions from probability theory, results for arbitrary probability distributions are obtained. We explain an anomaly in the forward scattering direction in single scattering theory, present simple formulas for the directivity, side lobe level, and beam efficiency for a general array antenna with random errors, and a simple formula for the scattering coefficient from a general frequency selective structure with random errors.},
  author       = {Sjöberg, Daniel},
  issn         = {1070-4698},
  language     = {eng},
  pages        = {13--39},
  publisher    = {EMW Publishing},
  series       = {Progress in Electromagnetics Research-Pier},
  title        = {Coherent effects in single scattering and random errors in antenna technology},
  url          = {http://dx.doi.org/10.2528/PIER04050401},
  volume       = {50},
  year         = {2005},
}