A satellite television antenna, comprising a feed and a metamaterial plate and a diverging component, wherein the diverging component is a concave lens, the metamaterial plate is located in front of a feed, the diverging component is configured for diverging electromagnetic waves, and the diverging component is located between the metamaterial plate and the feed, the metamaterial plate comprises a core layer, the core layer is configured for converging electromagnetic waves, the core layer comprises at least one core sublayer, the core sublayer comprises a sheet-like substrate and a plurality of artificial microstructures or pore structures located on/in the substrate, the core sublayer is divided into two parts according to refractive index distributions, with one part being a circular area which is in the center of the core sublayer, and the other part being a plurality of annuli which are distributed around and share the same center with the circular area, the refractive indexes of points at the same radius in the circular area and the annuli are the same and decrease with the increase of the radius, the minimum value of the refractive index in the circular area is smaller than the maximum value of the refractive index in the adjacent annulus, and in two adjacent annuli, the minimum value of the refractive index in the inner annulus is smaller than the maximum value of the refractive index in the outer annulus, wherein the core sublayer further comprises a filler layer covering the artificial microstructures, the artificial microstructures of each core sublayer of are of the same shape, the artificial microstructures at the points at the same radius in the circular area or annuli having the same physical dimensions, the physical dimensions of the artificial microstructures of the points gradually decreasing as the radius of the points increases in the circular area or annuli, the physical dimensions of the minimum artificial microstructures in the circular area being smaller than those of the maximum artificial microstructures in the adjacent annulus, and in two adjacent annuli the physical dimensions of the minimum artificial microstructure in the inner annulus being smaller than those of the maximum artificial microstructure in the outer annulus; or the artificial pore structures of each core sublayer are of the same shape, the artificial pore structures being filled with a medium whose refractive index is larger than that of the substrates, the artificial pore structures at the points at the same radius in the circular area and annuli being of the same volume and the volumes of the artificial pore structures gradually increasing as the radius of the points increases in circular area or annuli, the volume of the minimum artificial pore structure in the circular area being smaller than that of the maximum artificial pore structure in the adjacent annulus, and in two adjacent annuli, the volume of the minimum artificial pore structure in the inner annulus being smaller than that of the maximum artificial pore structure in the outer annulus; or the artificial pore structures of each core sublayer are of the same shape, the artificial pore structures being filled with a medium whose refractive index is smaller than that of the substrates, the artificial pore structures of the points at the same radius in the circular area and annuli being of the same volume and the volumes of the artificial pore structures of the points gradually decreasing as the radius of the points increases in circular area or annuli, the volume of the maximum artificial pore structure in the circular area being larger than that of the minimum artificial pore structure in the adjacent annulus, and in two adjacent annuli, the volume of the maximum artificial pore structure in the inner annulus being larger than that of the minimum artificial pore structure in the outer annulus.