| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve operation reliability or the like by setting a communication to a proper range in a communication controller (such as an entry device for a vehicle, for example,) composed of a main body equipment (on-vehicle equipment) and portable equipment. SOLUTION: Antennas 22-25 of the main body equipment 20 are composed of coil antennas, and the coil antenna is arranged in parallel with the floor surface of the vehicle (provided in an attitude that the axial line of the coil antenna is perpendicular to the floor surface). Especially, internal antennas 24 and 25 are arranged on the front side and the rear side near a center in the direction of the floor surface of the vehicle.</p> |
