Mobile device using a common antenna for near field communication and wireless charging

PURPOSE: A portable device is provided to reduce the number of mounted antennas by using a common antenna for near field communication and wireless charging. CONSTITUTION: An NFC(Near Filed Communication) signal determining module(100) includes a signal matching unit(110), a signal converting unit(120), a signal control unit(130), a first switch(400), and a second switch(500). The first switch controls the operation of an NFC operating unit(200). The second switch controls the operation of a battery unit(300) according to the signal of the signal control unit. The NFC operation unit performs a near field communication according to the control signal from the NFC signal determining module. The battery unit is wirelessly charged according to the control signal from the NFC signal determining module. [Reference numerals] (110) Signal matching unit; (121) RF/DC converter; (122) Regulator; (131) Signal demodulator; (132) Signal determiner; (133) ID storage unit; (200) NFC operating unit; (300) Battery unit; (400) First switch; (500) Second switch