A Novel Full‐Band Microwave Absorber Based on Scattering Enhanced Prism‐Honeycomb Nested Structure
Shaokang Liu, Yanming Zhou, Fangxin Zhang, Qingshan Wang, Xing Zhao, Bin Chao, Haihua Wu
Abstract
Abstract With advancements in radar detection technology, electromagnetic stealth has garnered significant attention in military applications. Traditional electromagnetic absorbers typically focus on tuning electromagnetic parameters; however, they are often limited by material constraints, resulting in effective absorption only within narrow frequency bands. This work presents a novel prism‐honeycomb nested microwave absorbing structure, inspired by the scattering phenomenon of light waves in a prism, which utilizes an enhanced scattering effect. The varying impedances of electromagnetic waves (EMWs) in different media lead to transmission and reflection that adhere to Snell's law at the interfaces. To optimize the scattering effect, the inner prism is filled with a high transmittance material, while the outer honeycomb structure incorporates a material with high dielectric loss. Consequently, electromagnetic waves experience significant attenuation within the unit. Despite a thickness of only 7 mm, this structure achieves over 90% EMW absorption across a broad frequency range of 1–18 GHz. Additionally, the honeycomb structure exhibits excellent mechanical load‐bearing capacity. The nesting of the prism further enhances support points, resulting in a compressive strength of 16.4 MPa. This innovative design not only facilitates full‐band absorption but also provides high mechanical load‐bearing capabilities, offering valuable insights for applications in electromagnetic stealth and camouflage.