Optimisation of Dallenbach Layers Using Real Materials

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Authors
  1. Saville, P.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Abstract
In this paper multilayer Dallenbach absorbers were designed using the genetic algorithm optimisation routine and known material properties. The genetic algorithm was used to provide the global minimum solution to the reflectivity performance of the absorbers. The bandwidth and reflectivity of the absorber designs depend on the number of layers, layer composition and the layer order. Successful absorber designs are those that present an impedance gradient to the electromagnetic radiation. With the limited number of materials used in this study it was possible to design an absorber with good reflectivity and bandwidth, however, the performance was not as good as found for Jaumann absorbers. Better performance may be achievable for a wider range of materials.

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Keywords
Genetic Algorithm;Optimisation;Absorber Design;Dallenbach;Absorber;Multilayer;Permittivity;Microwave properties;RAM (Radar Absorbing Material)
Report Number
DRDC-ATLANTIC-TM-2007-012 — Technical Memorandum
Date of publication
01 Jan 2007
Number of Pages
12
DSTKIM No
CA029647
CANDIS No
528047
Format(s):
CD ROM

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