Antenna apparatus and method for handover using the same

An antenna apparatus of a base station comprising:

• N planes supporting communication services of the base station in a 360 degree area;
• and
• a plurality of antenna elements disposed in each of the N planes,
• wherein the N is an integer equal to or more than 3, each of the N planes supports the communication services of the base station in a 360/N degree area, the plurality of antenna elements are arranged in a plurality of rows in each of the N planes, a number of antenna elements included in a downmost row of the plurality of rows is smaller than a number of antenna elements included in an uppermost row of the plurality of rows, differences between center angles of beams formed by the antenna elements included in the downmost row are larger than differences between center angles of beams formed by the antenna elements included in the uppermost row, the beams formed by the antenna elements included in the uppermost row are directed to coverage boundaries of the base station, and beams formed by antenna elements included in remaining rows except for the uppermost row among the plurality of rows are directed to inside of coverage of the base station.