Analysis of Microwave Absorber Using Sugarcane Bagasse for 27 - 29 GHz Frequency

Several research on microwave absorber have been mentioned, most of which aim to absorb this harmful electromagnetic radiation. Using biomaterial instead of polyurethane or polystyrene foam for absorber was beneficial to nature. This study suggested sugarcane bagasse as a material for absorbers in a 27–29 GHz frequency work. To demonstrate the absorption behavior of the sugarcane bagasse, we simulated using HFSS. The dielectric constant and loss tangent used are 0.161 and 1.44, respectively. The results confirmed that the thickness of the absorber significantly influences the effectiveness of microwave absorption. Both simulation and measurement results obtain a good performance of the sugarcane bagasse absorber over 29 GHz frequency in a round shape with a diameter of 70 mm and a thickness of 20 mm in a reflection factor of -33.18 dB and -20.42 dB. At the same time, an absorber with a diameter of 90 mm and thickness of 10 mm produced a reflection factor of -29.62 and -25.81 dB.