Patent ID: 7496371

Claim:
A portable terminal, comprising: a main receiving unit for receiving an incoming signal from a base station via a main antenna provided in the portable terminal; a sub receiving unit for receiving an incoming signal from the base station via a plurality of detection antennas provided in the portable terminal; a detection unit for detecting an arriving direction of a base station signal in a radio wave environment of the portable terminal, based on receiving level information of the main antenna, on receiving level information of the detection antennas, and on directivity information of the detection antennas; and a notifying unit for notifying information about the arriving direction of the base station signal detected by the detection unit; wherein the detection unit detects the arriving direction of the base station signal in the radio wave environment of the portable terminal, based on differential information in which a receiving level of the main antenna is lowered with respect to a receiving level of the detection antennas, and on the directivity information of the detection antennas.