Preliminary study on absorption rate of truncated wedge biomass microwave durian absorber

Technology of microwave absorber has been widely used by over sectors and industries to minimize the effects the radiated signals on the performance of the electronics circuit. Biomass waste material has potential to be used as an alternative way to develop the microwave absorber that used in RF anechoic chamber. This paper investigates the absorption rate performance of durian rind as raw material to develop as a microwave absorbing material for frequency range between 8 GHz to 12 GHz at normal incidents reflection. The absorption rate performances of the developed absorber are compared with the existing commercial absorber in term of absorption characteristics. All the design specifications duplicate the commercial absorber as reference. The measurement results revealed that the best absorption performance of the pure durian rind was 39dB at 10.8GHz and the average absorption obtained 29.5dB which is classified as good performance in absorption.