A Flexible Multifunctional Absorber/Reflector With Wideband and Low-Power Performance

This letter presents a multifunctional flexible absorber/reflector with wideband performance and low power consumption. The proposed unit cell utilizes only two PIN diodes to achieve four distinct functions with low power consumption. By integrating the metal structure of the unit cell with the PIN diode bias lines, the design is simplified. In addition, the physical characteristics of the proposed structure are thoroughly analyzed using equivalent circuit theory, electric field analysis, and surface current distribution, enhancing the understanding of the design mechanisms. The simulation and experimental verification results are in agreement. Four distinct functions are successfully demonstrated within the frequency band of 8.5 GHz to 12.5 GHz, with a maximum power consumption of only 0.078 W.