Highly Optically Transparent Metamaterials Absorber With Ultrawideband Absorption and Enhanced Shielding Performance

Achieving simultaneous optical transparency, ultrawideband microwave absorption and high‐level electromagnetic shielding in a single architecture presents a fundamental challenge. We introduce a systematic design philosophy that transcends the conventional layered approach to transparent metamaterial absorbers. By strategically integrating a patterned indium tin oxide layer for absorption and a low‐resistance metal mesh for shielding, the proposed structure achieves an ultrawide absorption band from 4.7 to 16.8 GHz with over 90% absorption, while maintaining an average optical transmittance above 80%. Crucially, it delivers exceptional shielding effectiveness greater than 48 dB across the entire working band. Experimental results validate the design, underscoring its potential for applications in transparent electronics, stealth windows and integrated systems where visual clarity and robust electromagnetic protection are paramount.