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Optimisation of stepped permittivity impedance loaded absorber

Optimisation of stepped permittivity impedance loaded absorber

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© The Institution of Engineering and Technology
Published

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.

Inspec keywords: electromagnetic wave absorption; microwave materials; permittivity

Other keywords: broadband microwave absorbers; absorber bandwidth; stepped permittivity impedance loaded absorber

Subjects: Microwave materials and structures; Electromagnetic wave propagation; Electromagnetic waves: theory

References

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