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Nonmagnetic ultra wideband absorber with optimal thickness

Kazemzadeh, Alireza LU and Karlsson, Anders LU (2010) In Technical Report LUTEDX/(TEAT-7189)/1-14/(2010) TEAT-7189.
Abstract
Design of ultra wideband absorbers with bandwidth ratios larger than 10:1 is investigated. It is explained that if there is no constraint on the total thickness of the absorber, achieving large bandwidths is straightforward. The problem becomes challenging when the minimization of the total thickness is considered. It is shown that for a given frequency response, the total thickness of a nonmagnetic absorber cannot be less than a theoretical limit. If a design method can reduce the total thickness to the theoretical limit level, its superiority over other design methods is doubtless. It is demonstrated that the capacitive circuit absorber approach has this unique feature. In order to clarify the design ideas and techniques, the optimal... (More)
Design of ultra wideband absorbers with bandwidth ratios larger than 10:1 is investigated. It is explained that if there is no constraint on the total thickness of the absorber, achieving large bandwidths is straightforward. The problem becomes challenging when the minimization of the total thickness is considered. It is shown that for a given frequency response, the total thickness of a nonmagnetic absorber cannot be less than a theoretical limit. If a design method can reduce the total thickness to the theoretical limit level, its superiority over other design methods is doubtless. It is demonstrated that the capacitive circuit absorber approach has this unique feature. In order to clarify the design ideas and techniques, the optimal absorber is developed in different stages. It is shown that unequal periods for the low-pass frequency selective surfaces are essential for attaining the optimal performance. (Less)
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organization
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Book/Report
publication status
submitted
subject
in
Technical Report LUTEDX/(TEAT-7189)/1-14/(2010)
volume
TEAT-7189
pages
14 pages
publisher
[Publisher information missing]
language
English
LU publication?
yes
id
6baf9c2c-4298-4e4d-8184-ba7ceef6472f (old id 1580970)
date added to LUP
2010-03-31 15:17:38
date last changed
2016-09-30 15:01:28
@misc{6baf9c2c-4298-4e4d-8184-ba7ceef6472f,
  abstract     = {Design of ultra wideband absorbers with bandwidth ratios larger than 10:1 is investigated. It is explained that if there is no constraint on the total thickness of the absorber, achieving large bandwidths is straightforward. The problem becomes challenging when the minimization of the total thickness is considered. It is shown that for a given frequency response, the total thickness of a nonmagnetic absorber cannot be less than a theoretical limit. If a design method can reduce the total thickness to the theoretical limit level, its superiority over other design methods is doubtless. It is demonstrated that the capacitive circuit absorber approach has this unique feature. In order to clarify the design ideas and techniques, the optimal absorber is developed in different stages. It is shown that unequal periods for the low-pass frequency selective surfaces are essential for attaining the optimal performance.},
  author       = {Kazemzadeh, Alireza and Karlsson, Anders},
  language     = {eng},
  pages        = {14},
  publisher    = {ARRAY(0x94719a8)},
  series       = {Technical Report LUTEDX/(TEAT-7189)/1-14/(2010)},
  title        = {Nonmagnetic ultra wideband absorber with optimal thickness},
  volume       = {TEAT-7189},
  year         = {2010},
}