Genetic Algorithm Optimization of Multilayer Jaumann Absorbers – Oblique Incidence

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Authors
  1. Saville, P.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Abstract
Multilayers of spacers and resistive sheets can produce wide bandwidth microwave absorbers. Absorber bandwidth increases with the number of resistive sheets and the resistance profile through the absorber determines its performance. Absorber design requires an optimisation tool. In this paper absorber design is optimized using the Genetic Algorithm for oblique angles of incidence. The influence of incident angle on absorber bandwidth is studied for 1 to 7- layer absorbers, high permittivity spacers and protective layers. It was found that the bandwidth at normal incidence remains fairly constant to an angle of about 30 degrees. Absorber performance was maintained out to large incident angles if the absorber was designed at the large angle, though at a cost of a thicker absorber.

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Keywords
Microwave;Absorber;Genetic Algorithm;Oblique;Angle of Incidence;Optimization;RAM (Radar Absorbing Material)
Report Number
DRDC-ATLANTIC-TM-2005-283 — Technical Memorandum
Date of publication
16 Dec 2005
Number of Pages
40
DSTKIM No
CA027078
CANDIS No
525092
Format(s):
Electronic Document(PDF)

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