Pyramidal absorbers loaded with resistive FSS

Ford, K.L.; Holtby, Daniel G.; Chambers, B.

doi:10.1109/aps.2007.4396556

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…Currently, the most widely used broadband anechoic absorbers are made out of carbon impregnated polyurethane (PU) foam in pyramidal, wedge, and in convoluted shapes [3]. Although frequency selective surfaces (FSS) have been studied [4,5], to improve the low frequency performance of these absorbers however, ferrite tiles are still preferred.…”

Section: Introductionmentioning

confidence: 99%

A Simple Technique for Improving the Anechoic Performance of a Pyramidal Absorber

Iqbal¹,

Malek²,

Lee³

et al. 2013

PIER M

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In this paper, we propose a very simple technique that offers an extra degree of freedom to optimize the design of a tire dustbased absorber with reduced height. Cladding is a technique that is used to enhance the surface properties of a part, and it has been used in many applications for many years. In this technique, a clad layer is created on the core material, and the composition of the clad layer is adjusted to enhance the performance of the core material. We use a rice husk-clad layer to enhance the impedance matching characteristics of the low-loss, tire-dust core, microwave absorber. The overall design is a two-layer, geometrically-tapered, pyramidal structure composed of two lossy waste materials. Our main goal was to make the front surface less reflective (impedance matched), hence the material of the outer layer (clad) of the absorber was selected on the basis of the analysis of the dielectric properties of the candidate materials. Optimum thickness of the clad was obtained by using CST simulation software and found to be 12 mm, for which a reflectivity performance of less than −20 dB was

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Section: Introductionmentioning

confidence: 99%