Patent ID: 8867317

Claim:
An electronic device comprising: a circuit substrate with electronic components being disposed thereon and having a first front surface side and a second back surface side; an antenna including (i) a core having a length direction and (ii) a coil including a conducting wire wound around the core and having a winding wire length along the length of direction of the core, the antenna being disposed on the first front surface side of the circuit substrate in such a way that the length direction of the core is nearly parallel to the first front surface side of the circuit substrate; an electronic component or a terminal disposed on the second back surface side of the circuit substrate in such a way as to correspond with a position of the coil of the antenna on the first front surface side; and a shield pattern disposed on the circuit substrate and/or in the circuit substrate between the antenna and the electronic component or the terminal; wherein a side length of the shield pattern in the length direction of the core of the antenna is shorter than the winding wire length of the coil in the core length direction and is within a region of the winding wire length.