To provide a magnetic core member configured so as to be able to simultaneously satisfy the improvement of a communication characteristic of an antenna coil and sufficient electromagnetic shielding action from a shield plate, an antenna module and a portable communication terminal provided with the antenna module.
In this magnetic core member 4 arranged between an antenna substrate formed with antenna coils 11 and 12 and a conductive shield plate and configured by filling soft magnetic powder 31 in insulating material 30, the magnetic core member is a two-layer structure consisting of a first layer 4A and a second layer 4B, wherein the first layer 4A has the filling factor of the soft magnetic power 31 smaller than that of the second layer 4B. The magnetic core member 4 is configured such that a first plane 4a of a side facing the antenna substrate 2 and a second plane 4b of a side facing the shield plate have different magnetic characteristics different from each other.
NOZAWA KAZUO
AKIYASU HIROSHI
