Magnetically Actuated Reconfigurable Metamaterials as Conformal Electromagnetic Filters

Electromagnetic (EM) metamaterials with tailored properties are developed for wave manipulation, filtering, and cloaking aerospace defense applications. While traditional EM exhibit fixed behaviors due to unchangeable material geometries after fabrication, reconfigurable allow tunable performance through electrical/mechanical reconfiguration strategies. Traditional biasing circuit-based electrical poses challenges complex circuit design, while motor-driven mechanical can lead bulky tethered structures restricted adaptability. Herein, magnetically actuated structurally enhanced adaptability/conformability different geometries, showing merits of fast, reversible, programmable shape morphing, developed. Magnetic actuation enables metamaterial's between flat deployed, folded, curved folded states both conformal freestanding 3D morphing. Locally, the fold subwavelength units properties, switching all-pass band-stop upon structural reconfiguration. Globally, structure conform morph surfaces. The metamaterial also serves as a medium customizable by rationally designing attached conductive patterns varied filtering performances such narrow-band, dual-band, wide-band behaviors, illustrating design flexibility application versatility metamaterial.