The directional antenna apparatus of a base station, after sensing the direction of an undesired wave, calculates the optimum amplitude weighting coefficients and optimum phase weighting coefficients for a plurality of directions between the move starting point and move end point of a mobile station and creates a reference table. Then, when receiving a request for communication from the mobile station, the directional antenna apparatus reads weighting coefficients from the reference table, sets them in each antenna element, and points the directivity toward the mobile station, and starts communication. Then, calculating the time when the mobile station arrives at the position corresponding to each direction from the destination of the mobile station and its moving speed, and reads one by one the optimum amplitude and phase weighting coefficients from the reference table, and sets them in each antenna element, and communicates with the mobile station, while tracking the mobile station.