Multiband Switchable Microwave Absorbing Metamaterials Based on Reconfigurable Kirigami–Origami

Abstract Intelligent regulation has emerged as a promising strategy for exploring novel applications of multifunctional metamaterials. Conventional regulation methods are generally constrained by fixed configurations, making achievement of the intended regulation effects difficult. This paper presents a reconfigurable metamaterial with tunable electromagnetic‐absorbing and load‐bearing performance. The metamaterial integrates highly stretchable fractal kirigami and bistable origami configurations, enabling 3D auxetic deformation. The synergistic deformation mechanisms are analyzed, and a prediction model is established to describe the variation in mechanical and electromagnetic performance during reconfiguration. Furthermore, an integrated genetic optimization is conducted to design a multiband radar stealth metamaterial, achieving an ultra‐broad absorption band from 2.7 to 15.6 GHz, with superior electromagnetic performance as the wave incidence angles increase. The synergetic deformation achieves an in‐plane strain of ≈40% and out‐of‐plane strain of over 182%, with a self‐locking effect enhancing load‐bearing capacity. Traditional origami techniques are leveraged for the innovative reconfigurable metamaterial, providing an available paradigm for tunable electromagnetic design.