BOOSTER ANTENNA COIL

PROBLEM TO BE SOLVED: To provide a booster antenna which can fully extend the distance of communication. SOLUTION: An RFID reader/writer 1 which can communicate with an RFID tag 3 at a predetermined carrier frequency has a booster antenna 2. A coupled resonant circuit is constituted so as to generat...

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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 which can fully extend the distance of communication. SOLUTION: An RFID reader/writer 1 which can communicate with an RFID tag 3 at a predetermined carrier frequency has a booster antenna 2. A coupled resonant circuit is constituted so as to generate diphasic characteristics by a P coil 11 of the RFID reader/writer 1 and a Q coil 21 of the booster antenna 2. The resonance frequency of the P coil 11 is different from that of the Q coil 21. Between two peaks of the diphasic characteristics, the carrier frequency is set to the peak which is higher. COPYRIGHT: (C)2009,JPO&INPIT