Title :
Optimisation of stepped permittivity impedance loaded absorber
Author :
Holtby, D.G. ; Ford, Kenneth L. ; Chambers, Barry
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 significant improvement in the absorber´s low frequency performance when compared with existing pyramidal absorbers. Optimisation of the design parameters has been carried out to maximise the absorber´s bandwidth at -40 dB reflectivity.
Keywords :
electromagnetic wave absorption; microwave materials; permittivity; absorber bandwidth; broadband microwave absorbers; stepped permittivity impedance loaded absorber;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2009.3277
