Performance evaluation of flat shape absorbers coated with multi-layer biomass composite

Microwave absorber is one of the main components used widely in anechoic chambers for antenna measurement. It is also used to absorb unwanted radiations in electronic products and other applications. This paper presents an investigation on the performance of flat shape microwave absorbers coated with biomass composite namely sawdust carbon and palm ash composite. The layer of biomass composite applied on the surface of this flat shape absorbers was found to contribute significant impact on the performance. This study is also looking at the impact of using two different board materials that is cardboard and plywood as the base of the absorbers. The wave frequency ranging from 8GHz to 12 GHz was chosen for the purpose of this study