NEAR FIELD COMMUNICATION SYSTEM AND METHOD THEREOF

摘要

A near field communications (NFC) system includes: a plurality of coils for coupling to an antenna of a portable device, wherein each two adjacent coils are partly overlapped with one another; a multiplexer selectively enabling at least one of the coils to build communications with the antenna, wherein the coils enabled by the multiplexer are selected to have a best coupling effect with the antenna and are combined into an effective antenna; and at least one adaptation network for adapting an input/output of the effective antenna.