A Reflective Metasurface Generates OAM Beams

In this paper, a low-profile, broadband reflective metasurface is proposed to generate orbital angular momentum (OAM) beams. The design method of generating is introduced, and the effectiveness of this method is verified by simulation. It can be seen that broadband OAM beam with the mode number
$l=1$
was successfully realized by simulation and showed good quality in the phase profile. The maximum gain of simulation reaches 17.61dB at 10GHz.