| abstract |
Disclosed are a microwave antenna and a communication device. The microwave antenna comprises a feed source, a first metamaterial tightly clinging to an aperture surface of the feed source and having a shape adapted to the aperture surface of the feed source, a second metamaterial disposed closely adjacent to lower and upper surfaces of the first metamaterial, and a housing which forms an enclosed cavity together with the first metamaterial and the second metamaterial. A surface of the housing opposite the first metamaterial and the second metamaterial is a metal reflective surface. Central axes of the feed source, the first metamaterial and the metal reflective surface coincide with each other. In the present invention, an electromagnetic wave is scattered by the first metamaterial and reflected by the metal reflective surface, and then radiated as a plane wave after passing through the second metamaterial. The thickness of the microwave antenna is reduced by means of the first metamaterial and the reflective surface, and the antenna directivity is enhanced by means of the second metamaterial. The refractive index distribution on the metamaterial sheet layers of the second metamaterial is obtained through an initial phase method. The calculation process is easily programmed and coded. A user only needs to master the use method of the code, which facilitates large-scale popularization. |