Title :
Optimisation of a stepped permittivity impedance loaded (SPIL) absorber
Author :
Holtby, Daniel G. ; Ford, Kenneth L. ; Chamber, B.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Sheffield, Sheffield
Abstract :
A novel type of pyramidal absorber is presented. This absorber utilises a combination of impedance loading and an exponential stepped permittivity profile. The new design offers a significant improvement in the absorber´s low frequency performance when compared with existing pyramidal absorbers. Optimisation of the design´s parameters, using a PSO algorithm, has been carried out to maximise the absorber´s bandwidth at -40 dB reflectivity.
Keywords :
anechoic chambers (electromagnetic); electromagnetic wave absorption; particle swarm optimisation; permittivity; PSO algorithm; absorber bandwidth; anechoic chambers; particle swarm optimisation; pyramidal absorber; stepped permittivity impedance loaded absorber optimization; Algorithm design and analysis; Anechoic chambers; Bandwidth; Design optimization; Frequency selective surfaces; Permittivity; Polynomials; Radar; Reflectivity; Surface impedance;
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
