Patent ID: 8395502

Claim:
An RFID (Radio frequency identification) system using circular polarized antennas, the RFID system comprising: a proximity sensor mounted at a kiosk and configured to sense proximity of a customer to the kiosk; a customer detector configured to detect whether the customer has proximately approached the kiosk by using a sensing signal from the proximity sensor; a server configured to request customer information and provide the customer with services based on the customer information if the customer detector detects that the customer has proximately approached the kiosk; and a reader configured to: recognize a tag by emitting an electromagnetic wave through a plurality of reader antennas when the server requests the customer information; read the customer information stored in the recognized tag; and provide the customer information to the server, wherein the plurality of reader antennas comprises: a first reader antenna mounted on an upper portion of a body of the kiosk a second reader antenna mounted at a middle portion of the body of the kiosk; and a third reader antenna mounted at a rear proximity position of a floor surface on which the customer stands.