Investigation of absorption properties of Sugarcane Bagasse-Coal pyramidal microwave absorber

Agricultural waste has shown its capability to replace the conventional microwave absorbers like polyurethane and polystyrene. The cheap cost of agricultural waste microwave absorber and high reflection loss make these absorbers much more efficient and effective absorbers. In this work sugarcane bagasse are used as microwave absorber and its absorption properties are enhanced by addition of coal in it. The whole work is completed in four stages. The dielectric properties of both sugarcane bagasse and mixture of sugarcane bagasse and coal is measured and their absorption behavior is simulated using CST Microwave studio which shows the enhancement in absorptive power of sugarcane bagasse by adding coal in it. In last stage, reflection loss of fabricated structure of sugarcane bagasse and coal is measured using Network analyzer and horn antenna which confirm the ability of sugarcane bagasse and coal structure to be used as a microwave absorber in designing the anechoic chamber.