an antenna control method selects as required one of two inbuilt antenna paths for optimal communication and includes a first transmission power of the antenna being acquired from one antenna path when a first and a second switch device are connected , and a second transmission power from a second antenna path when so connected . a determination is made on events or on a periodic basis as to whether the second transmission power is greater than or equal to the first transmission power , and the antenna path with greater power is selected for communication .