Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Programmable Radar and Programmable Vortex-Beam Generator
(A) The point-source excited programmable metamaterial.
(B) Photograph of the programmable radar.
(C) Measured results of beam steering.
(D–K) The coding schemes corresponding to the scanning angles from 0° to 70° with an increment of 10°.
(L) Experimental results of single-mode OAM-carrying beams with different topological charges of l = 2, 4, and 6.
