Near-field communication (nfc) tags optimized for high performance nfc and wireless power reception with small antennas

A device for concurrent near-field communication (NFC) and wireless power reception (WPR) using a magnetic field, comprising:

• a low-Q antenna resonant circuit configured to perform the NFC, and including
• a first antenna for magnetic flux of the magnetic field to flow therethrough, to thereby receive a NFC signal for the NFC, and
• a first antenna matching circuit that is connected to the first antenna and is so configured that a quality factor (Q-factor) of the low-Q antenna resonant circuit is no higher than 25;
• and
• a high-Q antenna resonant circuit configured to perform the WPR, and including
• a second antenna for the magnetic flux of the magnetic field to flow therethrough, to thereby receive wireless power for the WPR, and a second antenna matching circuit that is connected to the second antenna and
• is so configured that the Q-factor of the high-Q antenna resonant circuit is no lower than 50, wherein
• the low-Q and high-Q antenna resonant circuits are separate from each other.