Dual-band independent phase control based on high efficiency metasurface [Invited]

A general method to realize arbitrary dual-band independent phase control is proposed and demonstrated in this paper. A double-layered C-shape reflective meta-atom is designed to realize independent phase control with high efficiency. As a proof of concept, we propose two functional metasurfaces in the microwave region; the first metasurface performs beam steering in different directions, and the second metasurface generates achromatic beam steering at two distinct frequen-cies. Both simulation and measurement results agree well with the theoretical pre-setting. The maximum measured effi-ciency is 88.7% and 92.3% at 6.8 GHz and 8.0 GHz, respectively, for one metasurface, and 91.0% and 89.8% at 6.9 GHz and 8.6 GHz, respectively, for the other.

Automated summary

This paper introduces a general method for achieving arbitrary dual-band independent phase control using a double-layered C-shape reflective meta-atom design. Two functional metasurfaces are proposed in the microwave region, one for beam steering in different directions and the other for achromatic beam steering at two distinct frequencies. The simulation and measurement results show good agreement with theoretical predictions, with high efficiency achieved at multiple frequencies for both metasurfaces.