Genetic algorithm optimisation of pyramidal absorbers loaded with a binary FSS

Author

Holtby, Daniel G. ; Ford, Kenneth L. ; Chambers, Barry

Author_Institution

Dept. of Electron. & Electr. Eng., Univ. of Sheffield, Sheffield

fYear

2009

fDate

23-27 March 2009

Firstpage

3878

Lastpage

3880

Abstract

This paper describes a new type of pyramidal absorber design for use in anechoic chambers. To improve the absorbers performance at low frequency, it is loaded with impedance in the form of a frequency selective surface (FSS). A technique for optimising the pattern, and therefore impedance, of the FSS is explained. Finally, the reflectivity response of the new design is simulated and compared against those of an unmodified pyramidal absorber and one loaded with a single square loop FSS.

Keywords

anechoic chambers (electromagnetic); electromagnetic wave absorption; frequency selective surfaces; genetic algorithms; microwave materials; anechoic chambers; binary FSS; frequency selective surface; genetic algorithm optimisation; pyramidal absorbers; reflectivity response; single square loop FSS; unmodified pyramidal absorber; Algorithm design and analysis; Anechoic chambers; Design optimization; Electromagnetic heating; Frequency selective surfaces; Genetic algorithms; Permittivity; Reflectivity; Shape; Surface impedance;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation, 2009. EuCAP 2009. 3rd European Conference on

Conference_Location

Berlin

Print_ISBN

978-1-4244-4753-4

Electronic_ISBN

978-3-00-024573-2

Type

conf

Filename

5068435