Performance Study of Coconut Coir Pyra-Shape Absorber Design

Abstract

Agriculture waste has huge potential to be used as an alternative material for constructing microwave absorber which is typically used in an anechoic chamber. The existing microwave absorbers are normally manufactured from chemical substances. This project is proposing the use of a new composite biomass material namely coconut coir, for constructing microwave absorbers. Generally, pyramidal shape is chosen since it is commonly used in the industry. The major part of this project involves an intense study in designing and developing the best techniques to construct pyramidal shape microwave absorber. The frequency range investigated in this work is between 1GHz to 12GHz. Referring to the commercial absorber as the standard, the reflectivity performance of this coconut coir pyramidal absorber was thoroughly investigated in this research. It is then proven that the biomass material used in this study is found to have a significant impact on the microwave absorber performance.

Corrugated Profiles on Thin Lossy Dielectric Slabs for Wideband Electromagnetic Absorption up to 100 GHz

“…In [14] an array of 3D printed cross-shaped dots again achieves reflectivity less than -10 dB for incidence up to 45°. In [15] pyramidal/triangular shape absorbers www.videleaf.com realized in coconut coir achieve reflectivity below -15 dB from 2 to 20 GHz and for incidence angles up to 60°. In [27] another pyramidal configuration is proposed for flame-retardant applications.…”