ANTENNA ARRAY FOR RFID READER COMPATIBLE WITH TRANSPONDERS OPERATING AT DIFFERENT CARRIER FREQUENCIES

ANTENNA ARRAY FOR RFID READER COMPATIBLE WITH TRANSPONDERS OPERATING AT DIFFERENT CARRIER FREQUENCIES

PROBLEM TO BE SOLVED: To provide an RFID reader having a communication capability with a plurality of FRID transponders operating at different carrier frequencies while keeping a relatively compact shape without remarkable compromise for the communication range. SOLUTION: This antenna array provided...

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Bibliographische Detailangaben
1. Verfasser: QUAN RALPH W
Format: Patent
Sprache:eng
Schlagworte:
ANTENNAS, i.e. RADIO AERIALS
BASIC ELECTRIC ELEMENTS
CALCULATING
COMPUTING
COUNTING
ELECTRICITY
HANDLING RECORD CARRIERS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide an RFID reader having a communication capability with a plurality of FRID transponders operating at different carrier frequencies while keeping a relatively compact shape without remarkable compromise for the communication range. SOLUTION: This antenna array provided for an RFID reader includes a first reader antenna tuned to operate at a first frequency and a second reader antenna tuned to operate at a second frequency different from the first frequency. The first and second antennas are arranged in an overlapping arrangement or an opposing magnetic flux arrangement to reduce the effect of self resonance. COPYRIGHT: (C)2006,JPO&NCIPI