ARTIFICIAL COMPOSITE MATERIAL AND ANTENNA MADE OF ARTIFICIAL COMPOSITE MATERIAL

摘要

The present invention relates to a man-made composite material and a man-made composite material antenna. The man-made composite material is divided into a plurality of regions. An electromagnetic wave is incident on a first surface of the man-made composite material and exits from a second surface of the man-made composite material opposite to the first surface. An intersection between an i th region and the first surface is a bottom surface of the i th region. An intersection between the i th region and the second surface is a top surface of the i th region. A line connecting a radiation source to a point on the bottom surface of the i th region and a line perpendicular to the man-made composite material form an angle ¸ therebetween, which uniquely corresponds to a curved surface in the i th region. A set formed by points on the bottom surface of the i th region that have the same angle ¸ forms a boundary of the curved surface to which the angle ¸ uniquely corresponds. Each point on the curved surface to which the angle ¸ uniquely corresponds has a same refractive index. Refractive indices of each of the regions decrease gradually as the angle ¸ increases. By designing abrupt transitions of the refractive indices of the man-made composite material to follow a curved surface according to the present invention, the refraction, diffraction and reflection at the abrupt transition points can be reduced.