BOOSTER ANTENNA COIL

BOOSTER ANTENNA COIL

PROBLEM TO BE SOLVED: To provide a booster antenna coil which is capable of sufficiently extending a communication distance and ensuring a stable communication distance and reduces the required space. SOLUTION: An RFID reader/writer 1 communicable with an RFID tag 3 in a predetermined carrier freque...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: OSHIMA YASUO, SHIGETA SUSUMU
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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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a booster antenna coil which is capable of sufficiently extending a communication distance and ensuring a stable communication distance and reduces the required space. SOLUTION: An RFID reader/writer 1 communicable with an RFID tag 3 in a predetermined carrier frequency comprises a booster antenna 2. A P coil 11 of the RFID reader/writer 1 and a Q coil 21 of the booster antenna 2 constitute a coupling resonance circuit in such a way as to generate bimodal characteristics. The carrier frequency comes to between two peaks of the bimodal characteristics. A coupling coefficient of the coupling resonance circuit is magnetic coupling of 0.015-0.1. COPYRIGHT: (C)2009,JPO&INPIT