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Capacitive circuit method for fast and efficient design of wideband radar absorber

Författare:
Publiceringsår: 2009
Språk: Engelska
Sidor: 2307-2314
Publikation/Tidskrift/Serie: IEEE Transactions on Antenna and Propagation
Volym: 57
Nummer: 8
Dokumenttyp: Artikel

Sammanfattning

A simple, fast and efficient method for designing wideband radar absorbers is proposed. The idea is to modify the circuit analog absorber method without perturbing the bandwidth. This is done by utilizing the asymptotic behavior of such an absorber at low frequency and replacing the band-stop resonating frequency selective surfaces with low-pass capacitive ones, which can be synthesized by square patches. It is shown that higher frequencies are not influenced by these modifications. A thin wideband capacitive circuit absorber (CCA) is presented with 28% reduction of thickness and 57% increase of bandwidth in comparison to the Salisbury screen. It is also explained why some optimized metamaterial designs fail to compete with the CCA method. For high permittivity layers, it is shown that the CCA is a better solution than the Jaumann absorber and improvements both in thickness and bandwidth are possible. A three layered ultrawideband CCA is presented with total thickness of 15.1 mm.

Disputation

Nyckelord

  • Technology and Engineering
  • Capacitive circuit absorber (CCA)
  • Jaumann absorber
  • circuit analog absorber
  • lossy frequency selective surfaces
  • metamaterial
  • thin absorber

Övriga

Published
Yes
  • Electromagnetic theory
"©2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE."
  • ISSN: 0018-926X

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