PURPOSE: An embedded antenna device is provided to increase the bandwidth of a radiator by operating with a floating dummy pattern. CONSTITUTION: A first antenna radiator (30) is connected to a grounding area of a circuit board. The first antenna radiator includes two or more radiation patterns. A second antenna radiator (40) is operated in a frequency band which is different from the first antenna radiator. The second antenna radiator is arranged at a location which is adjacent to the first antenna radiator. A switching device (13) selectively supplies power to the first and the second antenna radiator.
