A pattern design strategy for microwave-absorbing coding metamaterials with tortuosity and connectivity

Microwave absorption presents a challenge for the design of metamaterials, which is critical for the stealth and electromagnetic compatibility. To address this, a novel design strategy for patterns is proposed to enhance the wave absorption, which is tortuosity and connectivity. Utilizing the carbon ink composite and genetic algorithm, multi-layer coding metamaterials (MCMs) are designed to satisfy diverse engineering specifications, with reflectivity tests confirming their efficacy. Temperature alternation experiments simulate frequent environmental changes, and the absorptivity of MCMs is compared to evaluate their resilience. This approach ensures the designed MCMs maintain performance and stability under variable thermal conditions, offering a robust solution for advanced applications. [Display omitted] •A novel design strategy enhances wave absorption, improving stealth and EM compatibility of metamaterials.•The design strategy enables genetic algorithms to code metamaterials with wider absorption, validated by tests.•Multi-layer coding metamaterials show resilience and stability in dynamic thermal environments under temperature variations.