Abstract: Provided is a portable device using a common antenna for both near field communication and wireless charging. The portable device includes: a common antenna part transmitting and receiving near field communication and wireless charging signals; an NFC signal judgment module connected to the common antenna part and sensing a signal applied from the common antenna part or a Tx signal generated from an NFC performing part to thereby judge whether or not the signal applied from the common antenna part or the Tx signal is the near field communication signal; an NFC performing part connected to the NFC signal judgment module and performing near field communication according to a control signal transferred from the NFC signal judgment module; and a battery part connected to the NFC signal judgment module and being wirelessly charged according to the control signal transferred from the NFC signal judgment module.

Abstract: Provided is a wireless charging control system based on a magnetic resonance type, and more particularly, a wireless charging control system based on a magnetic resonance type which does not require a separate transmitter unit and a receiver unit to detect a current charging state of a receiving charger unit between a power transmitter unit and the receiving charger unit and changes a transmission output of a power transmitter unit in real time by changing a load impedance of a load element coil using a variable capacitor or a switch to meet a charging state of a battery unit by the receiving charger unit to prevent unnecessary transmission power while charging, thereby more efficiently and safely performing wireless charging.

Abstract: Provided are a system and a method for wireless charging control, and more particularly, to a system and a method for wireless charging control capable of safely and conveniently performing wireless charging of a battery unit by performing near field communication and wireless charging between a power transmitting unit and a receiving charging unit in a time division manner using a common antenna which may be used for both of the near field communication and the wireless charging.