Patent ID: 7933553
Filing Date: 2011-04-26
Classification: G06K

Abstract:
1. A radio frequency identification (RFID) system comprising: an RFID tag that includes a first antenna for receiving and transmitting radio frequency signals, a memory device for storing data, and a transponder connected to the memory device and to the first antenna for transmitting a data signal representative of the stored data, wherein the RFID tag is attached to a data storage cartride; an RFID reader is spaced apart from the RFID tag and is part of a data storage tape reader, the RFID reader includes a second antenna for transmitting and receiving radio frequency signals, a decoder circuit that includes a transmitter circuit for transmitting an interrogation signal to the transponder, and a receiver circuit for receiving the data signal sent by the transponder in response to the RFID tag having received the interrogation signal, the RFID reader also includes a capacitor apparatus that can be adjusted to tune the transmitter and receiver to one of a plurality of frequencies, the RFID reader further includes a controller for directing the transmitter circuit to transmit the interrogation signal and for evaluating the data signal received by the receiver circuit to determine whether or not the data is acceptable, the controller accepts the data if acceptable and directs the capacitor apparatus to change the frequency of the transmitter circuit and receiver circuit to another one of the plurality of frequencies if the data is not acceptable.