Patent ID: 9722319
Date: 2017-08-01
CPC Classifications: H01Q

Claim:
1. A metamaterial antenna, comprising an enclosure, a feed, a first metamaterial that clings to an aperture edge of the feed, a second metamaterial that is separated by a preset distance from the first metamaterial and is set oppositely, and a third metamaterial that clings to an edge of the second metamaterial and inserts into the second metamaterial wherein the enclosure, the feed, the first metamaterial, the second metamaterial, and the third metamaterial make up a closed cavity; and a central axis of the feed penetrates center points of the first metamaterial and the second metamaterial; and a reflection layer for reflecting an electromagnetic wave is set on surfaces of the first metamaterial and the second metamaterial, wherein the surfaces are located outside the cavity; wherein an electromagnetic wave emitted to the second metamaterial passes through the reflection layer and then bypasses the feed and is reflected onto the first metamaterial; and an electromagnetic wave emitted to the first metamaterial passes through the reflection layer and then bypasses the second metamaterial and is reflected onto the third metamaterial, and, after passing through the third metamaterial, the electromagnetic wave is converted into a plane wave and then emitted; wherein the first metamaterial comprises multiple first metamaterial sheet layers, each first metamaterial sheet layer comprises a first substrate and multiple first artificial metal microstructures that are cyclically distributed on the first substrate, refractive indexes at different points of the first metamaterial sheet layer are distributed in a circular shape, a refractive index at a circle center is smallest, the refractive indexes increase gradually with increase of a radius that uses a center point of the first metamaterial sheet layer as a circle center, and, the refractive index is the same at the same radius; and wherein the second metamaterial is used to convert the electromagnetic wave emitted onto the second metamaterial into a plane wave through reflection, and then emit the plane wave onto the first metamaterial, and, by using a center point of the second metamaterial as a circle center, the refractive index n n