On the physical limit of radar absorbers
(2010) In Technical Report LUTEDX/(TEAT7191)/110/(2010) TEAT7191. Abstract
 A previous investigation has shown that at normal angle of incidence, the integral of the reflectance over wavelength is bounded for a flat metal backed absorber. The bound is applicable to any absorber made of linear, timeinvariant, causal and passive materials. We generalize the physical bound to arbitrary angle of incidence and polarization. Different design examples and numerical calculations are provided to investigate the inequalities. It is shown that the theoretical limit for TE polarization results in fair approximations of the integral of the reflectance over wavelength but the TM polarization overestimates the integral value. A simple relation for estimating the optimal thickness of a nonmagnetic absorber is suggested for... (More)
 A previous investigation has shown that at normal angle of incidence, the integral of the reflectance over wavelength is bounded for a flat metal backed absorber. The bound is applicable to any absorber made of linear, timeinvariant, causal and passive materials. We generalize the physical bound to arbitrary angle of incidence and polarization. Different design examples and numerical calculations are provided to investigate the inequalities. It is shown that the theoretical limit for TE polarization results in fair approximations of the integral of the reflectance over wavelength but the TM polarization overestimates the integral value. A simple relation for estimating the optimal thickness of a nonmagnetic absorber is suggested for arbitrary angle of incidence. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/record/1581320
 author
 Karlsson, Anders ^{LU} and Kazemzadeh, Alireza ^{LU}
 organization
 publishing date
 2010
 type
 Book/Report
 publication status
 published
 subject
 in
 Technical Report LUTEDX/(TEAT7191)/110/(2010)
 volume
 TEAT7191
 pages
 10 pages
 publisher
 [Publisher information missing]
 external identifiers

 scopus:78650397675
 language
 English
 LU publication?
 yes
 id
 f8decf9116d94c418401265514c40c74 (old id 1581320)
 date added to LUP
 20100406 09:46:08
 date last changed
 20170101 08:12:04
@techreport{f8decf9116d94c418401265514c40c74, abstract = {A previous investigation has shown that at normal angle of incidence, the integral of the reflectance over wavelength is bounded for a flat metal backed absorber. The bound is applicable to any absorber made of linear, timeinvariant, causal and passive materials. We generalize the physical bound to arbitrary angle of incidence and polarization. Different design examples and numerical calculations are provided to investigate the inequalities. It is shown that the theoretical limit for TE polarization results in fair approximations of the integral of the reflectance over wavelength but the TM polarization overestimates the integral value. A simple relation for estimating the optimal thickness of a nonmagnetic absorber is suggested for arbitrary angle of incidence.}, author = {Karlsson, Anders and Kazemzadeh, Alireza}, institution = {[Publisher information missing]}, language = {eng}, pages = {10}, series = {Technical Report LUTEDX/(TEAT7191)/110/(2010)}, title = {On the physical limit of radar absorbers}, volume = {TEAT7191}, year = {2010}, }