Radio frequency identification transponder employing patch antenna

Radio frequency identification transponder employing patch antenna

A radio-frequency identification (RFID) transponder (tag) in accordance with the principles of the invention includes a patch antenna. The patch antenna may be co-located with RFID circuitry and an impedance matching circuit on one side of a substrate. A ground plane may be formed on the opposite si...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MOSKOWITZ PAUL ANDREW, BRADY MICHAEL JOHN, FEILD CHRISTOPHER ADAM, RAO KODUKULA VENKATA S, DUAN DAH-WEIH
Format: Patent
Sprache:eng
Schlagworte:
ALARM SYSTEMS
CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
ORDER TELEGRAPHS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
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Beschreibung
Zusammenfassung:A radio-frequency identification (RFID) transponder (tag) in accordance with the principles of the invention includes a patch antenna. The patch antenna may be co-located with RFID circuitry and an impedance matching circuit on one side of a substrate. A ground plane may be formed on the opposite side of the substrate. A quarter wave transformer may provide an "RF short" to ground to connect the RFID circuitry on one side of the substrate with a ground plane located on the opposite side of the substrate.