Patent ID: 7061436

Claim:
An antenna device suitable for use in an extremely high frequency wireless LAN, said antenna device comprising: a wave director of a preset length, a reflector, and a radiator that are arranged to have a changeable positional relation wherein the wave director and the reflector are located in parallel across a predetermined distance on a first member, the radiator being located on a second member, which is different from the first member, and a moving mechanism that is arranged to move at least one of the wave director, the reflector, and the radiator to switch the positional relation between a first position where the wave director, the reflector, and the radiator are arranged in parallel with one another across preset intervals and have identical centers and a second position that is different from the first position, the first member and the second member being movable to attain the first position and the second position; and wherein said antenna device functions as a directional antenna at the first position and functions as a non-directional antenna at the second position.