NFC antenna using dual resonance technical field

摘要

The present invention is disclosed to provide an NFC antenna using dual resonance, wherein a closed circuit is formed by a capacitor and a loop antenna, and a relay unit is attached to a portable wireless terminal that forms a resonance to a predetermined frequency signal mutually transmitted between a portable wireless terminal reader and an NFC chip, and in the course of communicating between the NFC chip and the reader, the relay unit relays a signal transmitted by the reader to an NFC antenna unit, and the NFC chip relays a signal transmitted through the NFC antenna unit to the reader to thereby increase a recognition distance capable of obtaining predetermined information.

主权项

1. A case configured to be attachable to and detachable from a portable wireless terminal, the case having an inner surface and an outer surface and comprising a relay unit attached to the inner surface or the outer surface of the case,
wherein the relay unit comprises a closed circuit with a loop antenna configured to provide a resonance to relay transmission signals of an external reader and an attached NFC antenna unit on an inner substrate of the portable wireless terminal.