Design and performance of trapezoidal honeycomb absorbing structure based on FDM

Abstract The increasing prevalence of electronic devices and the rapid evolution of communication technologies underscore the critical need for effective management of electromagnetic interference and assurance of electromagnetic compatibility. This study presents an innovative trapezoidal honeycomb absorber structure, optimized to enhance the absorption of electromagnetic waves across a broad spectrum. By leveraging Fused Deposition Modeling (FDM) 3D printing technology, we have fabricated a short-cut carbon fiber composite material that exhibits superior electromagnetic and mechanical properties. Our research specifically focused on optimizing the honeycomb sidewall inclination angle to maximize absorption performance. We discovered that a 15° angle configuration yielded the broadest effective absorption bandwidth and the highest absorption efficiency. The structure demonstrated a significant -10 dB absorption bandwidth of 9.95 GHz within the 2-18 GHz range, underscoring its potential for managing a wide spectrum of electromagnetic waves. Furthermore, we explored the absorber’s performance under various angles of incidence, confirming its robustness across a broad range. These findings significantly advance the development of electromagnetic wave absorption materials, positioning the trapezoidal honeycomb structure as a key technology for future electromagnetic wave shielding applications.