ANTENNA COIL, ANTENNA DEVICE AND MOBILE TERMINAL

摘要

PROBLEM TO BE SOLVED: To provide an antenna device that prevents degradation in communication performance depending on an angle to be formed to a reading surface of a reader/writer, and to provide a mobile terminal with the same.

SOLUTION: A rectangle helical coil conductor CW is formed on a flexible substrate 10. The flexible substrate 10 includes a first opening at a winding center of the coil conductor CW, and includes a second opening between adjacent prescribed coil conductors in areas except the winding center. A magnetic core 1 is provided at a state for penetrating the first opening from a first principal plane of the flexible substrate 10 and penetrating the second opening from the second principal plane of the flexible substrate 10. An antenna coil 21 is arranged near the end of a circuit board 20.

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