A transmissive water-based metamaterial absorber(TWMA) is designed, simulated, and measured, which uses 3D-printing to manufacture. The TWMA uses a circular column and rectangular water layer structure and has no metal backplane. We have proved theoretically and experimentally that the TWMA has absorption rate exceeds 90% in the frequency ranging from 6.5 to 21.4 GHz. Furthermore, the TWMA is thermo-tunable when temperatures change from 10 to 60 °C and has the characteristics of wide angle incidence and polarization insensitivity. It can be applied to a variety of electromagnetic applications, such as reducing broadband scattering and collecting electromagnetic energy in a variable temperature environment.

设计，模拟和测量了一种透射式水基超材料吸收器（TWMA），它使用3D打印进行制造。TWMA使用圆柱和矩形水层结构，没有金属底板。我们从理论和实验上证明了TWMA在6.5至21.4 GHz频率范围内的吸收率超过90％。此外，当温度从10变为60°C时，TWMA是可热调谐的，并且具有广角入射和偏振不敏感的特性。它可以应用于各种电磁应用，例如减少宽带散射并在可变温度环境中收集电磁能量。