A Dual-Band 3-Bit Phase-Modulated Metasurface

Metasurfaces have exhibited astonishing capabilities in many applications, such as beam steering, wireless communication, and holographic imaging. To enhance the efficiency and capabilities of metasurface applications, researchers are currently investigating multi-band and high-bit digital metasurfaces. In this paper, we propose a dual-band 3-Bit phase-modulated meta-element. One varactor is employed to tune the phase responses of the meta-element, meanwhile, a PIN diode is used to control the working frequency band. The full-wave electromagnetic (EM) simulation results of the meta-element display good performance, indicating that the meta-element has the potential to considerably improve metasurface application performance.