Design and Improvement of a Layered Broadband Absorber Based on a Circuit Analog

The article delves into the intricate design and enhancement of a broadband absorber utilizing a circuit analog approach, addressing the critical need for effective electromagnetic (EM) wave absorption across various frequencies. The study introduces a novel absorber structure composed of a frequency-selective surface (FSS) layer, dielectric material, and a perfect electric conductor (PEC) layer, achieving remarkable absorption bandwidth and angle stability. Through meticulous design and optimization, the absorber demonstrates superior performance, with a reflectivity below −10 dB over a broad frequency range. The incorporation of glass fiber-reinforced epoxy (GFRE) as an envelope further enhances mechanical and dielectric properties, leading to improved absorption characteristics. The article provides comprehensive simulations and experimental validations, showcasing the absorber's potential for applications in radar cross-section reduction, satellite communications, and Wi-Fi devices. The innovative design and materials used in this study set a new benchmark for broadband absorbers, offering a promising solution for EM interference mitigation and precision electronic device protection.