Publication: Modelling and performance analysis of carbon coated pyramidal electromagnetic absorber
Date
2024-10
Authors
Muhammad Danisy bin Samsun Zaini
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
This project explores the design and performance analysis of carbon-coated pyramidal electromagnetic absorbers for anechoic chamber applications, targeting a
frequency range of 3 GHz to 20 GHz. The study utilizes CST software to model absorbers with varying parameters such as coating materials with different relative permittivities, coating thicknesses, and pyramid heights. Initial results for an uncoated absorber revealed a minimum reflection coefficient of -31.96066 dB at 18.74 GHz. Enhancements were achieved by applying a carbon coating with a relative permittivity of 3.43, which reduced the reflection coefficient to -53.8437 dB at 10.16 GHz with a 1 mm thick coating. Further optimization identified the optimal pyramid height and coating thickness, achieving a reflection coefficient of -63.1093 dB at 13.42 GHz using a material with a relative permittivity of 2.08 and a 1 mm thick coating. The findings underscore the significance of coating thickness and pyramid height in enhancing absorber performance, offering valuable insights for future developments in electromagnetic wave absorption technologies.