Optimisation of a Stepped Permittivity Impedance Loaded (SPIL) Absorber

Konferenz: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
23.03.2009 - 27.03.2009 in Berlin, Germany

Tagungsband: EuCAP 2009

Seiten: 3Sprache: EnglischTyp: PDF

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Holtby, Daniel G.; Ford, Kenneth L.; Chambers, Barry (Department of Electronic and Electrical Engineering, University of Sheffield, Mappin Street, Sheffield, S1 3JD, United Kingdom)

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 -40dB reflectivity.