ANTENNA, RADIO BASE STATION DEVICE AND ARRANGEMENT METHOD FOR ANTENNA ELEMENTS

摘要

PROBLEM TO BE SOLVED: To reduce a possibility that a radio station of which the channel correlation becomes high is present.SOLUTION: An antenna is formed by disposing a plurality of antenna elements on a plane or a quasi-plane that is a curved surface that can be approximated to a plane, in a row direction and a column direction in a two-dimensional manner. In the case where the plurality of antenna elements are projected to a first projection axis represented by a straight line that the plane or the quasi-plane and a horizontal surface cross when installing the antenna, projection points of the plurality of antenna elements on the first projection axis are partially overlapped, and the projection points are disposed at positioned that become equal intervals on the first projection axis. On a second projection axis which is represented by a straight line that a plane orthogonal with a straight line connecting several antenna elements among the plurality of antenna elements and a the plane or the quasi-plane cross, and where the number of projection points of the plurality of antenna elements on the second projection axis is minimum or an angle formed from the second projection axis and the horizontal plane becomes minimum, the projection points of the plurality of antenna elements become equal intervals.SELECTED DRAWING: Figure 1