RFID reader/writer
AssigneeFujitsu Limited
InventorsToru Maniwa, Shigekazu Kimura
Life of this patent
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Abstract
A reader/writer 25 transmits an instruction for changing over between antennas 31 and 32, carried on a high frequency wave in the same format as a common command. A part of the antenna is equipped with a command interpretation circuit 30 which demodulates a high frequency wave received from the reader/writer body 25 and obtains a command content. If this command is an antenna changeover instruction of the reader/writer itself, the command interpretation circuit 30 instructs a changeover signal generation unit 28 for generating a changeover signal and changes over antennas by controlling a high frequency wave switch unit 29.
Claims6
A radio frequency identification (RFID) reader/writer for communicating with an RFID tag, comprising:
- a plurality of antennas for the purpose of communicating with an RFID tag from different directions;
- a command transmission unit for setting, and transmitting, a changeover command for the antennas;
- and
- an antenna changeover unit for changing over the antennas for use by interpreting the aforementioned command transmitted from the command transmission unit.
An antenna changeover method for a radio frequency identification (RFID) reader/writer for communicating with an RFID tag by using a plurality of antennas,
- changing over a plurality of antennas by carrying out an antenna changeover instruction transmitted by the same method as a communication with an RFID tag.
Dependencies are inferred from the claim text.