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To reveal the correlation between the anisotropy of electromagnetic absorbing metastructures and the radar cross section (RCS) of its curved components, the typical anisotropic hexagonal honeycomb (HH) metastructure and isotropic sheet gyroid (SG) metastructure are systematically studied. Then, both conformal mapping and non-conformal mapping methods were employed for designing the conformal curved components. These designs were compared using simulation and microwave anechoic chamber testing to evaluate their RCS. The results indicate that the RCS of isotropic sheet gyroid curved components are insensitive to design methods, demonstrating strong design method and absorbing robustness; however, the RCS of anisotropic hexagonal honeycomb curved components exhibit strong dependence on design methods. Compared to anisotropic structures, metastructures with electromagnetic isotropy offer significant advantages in achieving wide-angle and robust low-scattering characteristics for curved components, with lower dependence on design and processing. This study provides important design guidance for developing high-performance radar low-scattering components.
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Keywords:
- electromagnetic absorbing metastructure /
- electromagnetic anisotropic /
- conformal design /
- additive manufacturing
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