PARAMETRIC STUDIES OF THE PYRAMIDAL MI- CROWAVE ABSORBER USING RICE HUSK

Agriculture waste has potential to be used as an alternative material for the microwave absorber used in the anechoic chamber. Compared to the current materials used, such as polystyrene and polyurethane, agricultural waste has low cost and is environmental friendly. In this paper, rice husks from paddy are used as the material in the pyramidal microwave absorber design, to operate efiectively in the frequency range from 1GHz to 20GHz. Urea Formaldehyde (UF) and Phenol Formaldehyde (PF) are the resins investigated and are used to make the rice husk particle board. There are four main stages in designing the rice husk pyramidal microwave absorber. They are