Lens, lens antenna, remote radio unit, and base station

A lens, comprising a substrate layer and a metal layer, wherein

• at least one surface of the substrate layer is a concave surface or a convex surface;
• the metal layer exists on the at least one surface of the substrate layer;
• the metal layer comprises a metal part and a hollow-out part, and the metal part or the hollow-out part is presented by using a graphics array;
• the graphics array comprises a plurality of first rings, the first ring comprises a plurality of graphic units, and a larger ring encircles a smaller ring in the plurality of first rings;
• and
• at least one of the following are different:
• size of graphic units comprised in two adjacent first rings, rotation angle of graphic units comprised in two adjacent first rings, or two adjacent first intervals, wherein the first interval is an interval between the two adjacent first rings.

A lens antenna, comprising:

• a feed and a lens;
• wherein the feed is configured to radiate an electromagnetic wave and the feed is disposed on a focal plane of the lens;
• and
• wherein the lens comprises a substrate layer and a metal layer, wherein
• at least one surface of the substrate layer is a concave surface or a convex surface;
• the metal layer exists on the at least one surface of the substrate layer;
• the metal layer comprises a metal part and a hollow-out part, and the metal part or the hollow-out part is presented by using a graphics array;
• the graphics array comprises a plurality of first rings, the first ring comprises a plurality of graphic units, and a larger ring encircles a smaller ring in the plurality of first rings;
• and
• at least one of the following are different:
• size of graphic units comprised in two adjacent first rings, rotation angle of graphic units comprised in two adjacent first rings, or two adjacent first intervals, wherein the first interval is an interval between the two adjacent first rings.