Optimisation of Dallenbach Layers Using Real Materials

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.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2007
Accession Number
ADA475367

Entities

People

  • P. Saville

Organizations

  • Defence Research and Development Canada

Tags

DTIC Thesaurus Topics

  • Algorithms
  • Angle Of Incidence
  • Bandwidth
  • Classification
  • Electromagnetic Radiation
  • Frequency
  • Frequency Bands
  • Genetic Algorithms
  • Impedance
  • Magnetic Materials
  • Materials
  • Optimization
  • Radiation
  • Reflection
  • Reflectivity
  • Refractive Index
  • Security

Readers

  • Fluid Dynamics.
  • Microwave Engineering.
  • Solar Photovoltaics and Thermoelectric Devices.

Technology Areas

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