Ku-Band Microwave-Absorbing Composite of Silicon Carbide- Polyacrylic Acid-Polypyrrole: Design, Fabrication, and Performance Evaluation

Silicon Carbide and polypyrrole (PPy) composites were prepared using various techniques, including in-situ polymerization on the surface of core-shell structured nanoparticles. This study introduces an innovative approach for coating nanoparticles with polyacrylic acid (PAA) in an aqueous medium. The combination of powders with exceptional electromagnetic wave absorption (EMA) properties and resins is a crucial strategy for the development of electromagnetic wave (EMW) shielding composites. However, the high cost, low efficiency, and complex synthesis of these powders limit their practical use in composite materials. Additionally, these composites require increased thickness to meet the electromagnetic wave absorption standards. The composites were evaluated at different thicknesses, with results showing that they effectively absorbed electromagnetic waves across the entire Ku band. By adjusting the thickness, efficient absorption within the ۱۲-۱۸ GHz range was achieved. This study presents a novel approach to creating cost- effective, easy-to-synthesize, and high-yield EMW absorbers, which opens up possibilities for their integration into absorber-based composite materials. These materials offer great potential for applications in electromagnetic wave shielding in various industries. The optimal microwave absorption performance was observed at ۱۲ GHz for PPy and at ۱۳ GHz for SiC-PAA-PPy, with a minimum reflection loss of -۲۲ dB. This breakthrough highlights the versatility of these composites, which can be fine-tuned for specific high-frequency applications, making them highly valuable in emerging technologies such as ۵G communication, radar systems, and military stealth applications. Their cost-effectiveness, ease of synthesis, and excellent absorption characteristics position them as promising candidates for advanced EMW shielding solutions.

کلیدواژه ها:

۵G ، ۱۲-۱۸ GHz ، Ku band ، polypyrrole ، Absorbing Composite