Reconfigurable angle sensitive metasurface for multibeam manipulation

An angle sensitive transmission metasurface unit structure is designed in this paper. The metasurface unit presents a good transmission performance for the TE wave incidence, and has a linear phase response with the maximum phase difference up to 180 & DEG; when the incidence angle changes in the range of -45 & DEG; and +45 & DEG;. Moreover, a reconfigurable design of the metasurface unit is realized by loading a varator, and the phase difference is extended to 270 & DEG; to satisfy the demand of multibit metasurface. Based on the characteristics of angle sensitivity and reconfigurability of the metasurface unit, combined with the control of the varactor and the unit tilt angle, a new 1-bit digital coding angle sensitive metasurface is proposed. The metasurface has a specification of 20 x 20 and a center frequency of 10 GHz. Both the simulation and measurement show that different transmission is realized for incident waves at different incident angles. It can form different beams, which can be used for multibeam modulation with the same frequency and same polarization.

Automated summary

This paper designs an angle sensitive transmission metasurface unit structure, which has good transmission performance for TE wave incidence and linear phase response with a maximum phase difference of 180° when the incidence angle changes in the range of -45° and +45°. A reconfigurable design of the metasurface unit is realized by loading a varactor, extending the phase difference to 270° to satisfy the demand of multibit metasurface. Based on the characteristics of angle sensitivity and reconfigurability, a new 1-bit digital coding angle sensitive metasurface is proposed. The simulation and measurement results demonstrate its capability to form different beams for multibeam modulation with the same frequency and polarization.