Large‐Scale and Wide‐Angle Invisibility via Transmitter‐Receiver Decoupled Metasurfaces

ABSTRACT Invisibility has attracted long‐standing interest, enabled by the advent of metamaterials and transformation optics, yet it still faces challenges on the way to practical deployment. An outstanding challenge lies in large‐scale invisibility while maintaining wide‐angle robustness, since meta‐atom‐based invisibility cloaks manipulate incident waves only at local positions, and inherent strong angular dispersion severely restricts the angular response of these meta‐cloaks. In this paper, we propose a transmitter‐receiver decoupled meta‐cloak to simultaneously realize large‐scale and wide‐angle invisibility. By spatially decoupling the receiver and transmitter channels of the meta‐cloak, we can easily control the electromagnetic wavefront at distinct positions across an electrically large length, thereby enabling large‐scale invisibility (larger than 100 λ 0 ). The serpentine transmission line interconnecting both channels suppresses angular dispersion while retaining flexible phase control, conferring wide‐angle robustness. As a proof of concept, three meta‐devices, including symmetric, asymmetric, and complex meta‐cloaks, are experimentally demonstrated in both near‐ and far‐fields, showing over 90% far‐field scattering correlation with a flat ground plane and successful hiding of conformal and complex targets within 0–50°. This work validates a deployable cloaking strategy, marking a significant step toward practical applications and ultimately toward the realization of wide‐angle invisibility for electrically large and complex targets.