Optically Transparent Flexible Metamaterial for Ultrabroadband Millimeter-Wave Absorption

In this paper, we introduce an innovative metamaterial constructed from indium tin oxide sheets, designed for the purpose of ultrabroadband absorption of millimeter waves with the property of being optically transparent and flexible. Moreover, the absorber also demonstrates exceptional conformal RCS reduction within the frequency range of 34-52.5 GHz, which can potentially enhance the stealth performance of structures to some degree. The proposed absorber stands out due to its unparalleled ultrawideband absorption capabilities, coupled with optical transparency and a flexible structure. These attributes render it an exceptionally promising solution for applications in the realms of millimeter-wave stealth technology and electromagnetic compatibility in the fields of mobile communication, vehicular networks, and the Internet of Things.