An Ultra-Wideband and Translucent Metasurface Absorber Based on Water

Electromagnetic metasurface has become the focus of researchers in the field of electromagnetic absorption in recent years because of its thin thickness, simple structure, and high absorption rate. With high real and imaginary parts of the permittivity in the microwave frequency regime, water plays a crucial role in absorbing materials. This work demonstrates a water-based translucent metasurface with 5.2 mm, which is fabricated by 3D printing. By changing the conductivity of water, a metasurface with good absorption performance is obtained, which can realize ultra-wideband absorption in 5.85-23.1 GHz and 5.85-14.8 GHz under the oblique incidence of 40 degrees. The metasurface has the characteristics of thin thickness, wide-band absorption, and translucency.