BASE STATION ANTENNA

摘要

The present invention relates to a base station antenna comprising an antenna module having multiple resonators arranged in an array and a metamaterial module arranged in correspondence to the resonators. The metamaterial module comprises at lease one metamaterial lamella. Areas on each metamaterial lamella directly opposite to each resonator form refractive index distribution areas. Each refractive index distribution area forms therein multiple refractive index straight lines parallel to each other. With one refractive index straight line within each refractive index distribution area as a dividing line, several adjacent refractive index straight lines on each side of the dividing line are grouped as a set to form multiple square areas. Points on a same refractive index straight line within each square area have identical refractive indexes. The refractive index of each refractive index straight line decreases along the direction away from the dividing line, while the rate of decrease increases gradually. Within each square area, the refractive index straight lines closest to and farthest from the dividing line respectively are provided with identical refractive indexes, thus improving the directionality and gain of the antenna.