Genetic Algorithm Optimization of Multilayer Jaumann Absorbers. Oblique Incidence

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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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2005
Accession Number
ADA472943

Entities

People

  • Paul Saville

Organizations

  • Defence Research and Development Canada

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Absorption
  • Algorithms
  • Angle Of Incidence
  • Bandwidth
  • Classification
  • Electromagnetic Radiation
  • Frequency
  • Frequency Bands
  • Genetic Algorithms
  • High Angles
  • Materials
  • Microwaves
  • Optimization
  • Radiation
  • Refractive Index
  • Resistance
  • Security

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Combustion Dynamics and Shock Wave Physics.
  • Microwave Engineering.

Technology Areas

  • AI & ML
  • AI & ML - Machine Learning Algorithms
  • Biotechnology