Design of pyramidal microwave absorber using agriculture waste with different resin content percentage

Abstract

Agriculture waste has many potential to produce an alternative and beneficial product for any suitable application such as microwave absorber for anechoic chamber. In this work, agriculture waste like rice husk from paddy are used in design the pyramidal microwave absorber to operate effectively in the microwave frequency from 1 GHz to 20 GHz. Firstly, rice husk particle board are fabricate in the material lab. Two types of resin, Urea Formaldehyde (UF) and Phenol Formaldehyde (PF) are mixed with the rice husk to make comparison of dielectric properties for both mixed rice husk with UF and PF content. Three different percentage of resin content discussed in this work are 10 %, 20 % and 30 %. Free Space Measurement Method is chosen to define the dielectric constant of the rice husk. After that, this microwave absorber is simulated in CST Microwave Studio using the value that get from the Free Space Measurement Method to compare the reflectivity performance or S11 result for the microwave absorber.