ANTENNA MODULE MAGNETIC CORE MEMBER, ANTENNA MODULE, AND MOBILE INFORMATION TERMINAL USING THE SAME

摘要

There are provided an antenna module magnetic core member, an antenna module, and a mobile information terminal using the same capable of increasing a communication distance without increasing the module thickness. The magnetic core member (18) for the antenna module (10) forms an annular groove (18c) as an indentation in a surface of the side where an antenna coil (15) is formed and to which the loop portion of the antenna coil (15) opposes. Eddy current generated in the magnetic core member (18) in a high-frequency magnetic field is concentrated on a surface of the magnetic core member (18) of the side where the antenna coil (15) is formed and to which the loop portion of the antenna coil (15) opposes. Accordingly, the annular groove (18c) is formed in that area so as to reduce the eddy current generated, there by improving the communication distance characteristic of the antenna module.