RFID tag employing hollowed monopole antenna
AssigneeIntermec IP Corp.
InventorCurtis L. Carrender
Life of this patent
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Abstract
A radio-frequency identification (RFID) transponder (tag) in accordance with the principles of the invention includes a hollowed monopole antenna. The hollowed monopole antenna is co-located on a substrate with RFID circuitry and a quarter wave transformer. The quarter wave transformer acts as a reference for the RFID circuitry. The monopole antenna may have a trapezoidal shape, such as triangular or rectangular, that increases the effective electrical length of the antenna without increasing its overall surface area.
Claims18
An RF tag comprising:
- a substrate;
- an RF integrated circuit affixed to a first side of said substrate;
- and
- a hollowed monopole antenna affixed to said first side of the substrate and connected to a terminal of the RF integrated circuit, wherein said hollowed monopole antenna comprises a planar surface having interior and exterior perimeter edges.
An RF tag comprising:
- a substrate;
- an RF integrated circuit affixed to a first side of said substrate;
- a hollowed monopole antenna affixed to said first side of the substrate and connected to a terminal of the RF integrated circuit, wherein said hollowed monopole antenna comprises a planar surface having interior and exterior perimeter edges;
- and
- a transformer affixed to said first side of said substrate and to a second terminal of said integrated circuit.
An RF tag comprising:
- a substrate;
- an RF integrated circuit affixed to a first side of said substrate;
- and
- a hollowed monopole antenna affixed to said first side of the substrate and connected to a terminal of the RF integrated circuit, wherein said monopole antenna comprises a planar surface having interior and exterior perimeter edges having a generally polygonal shape.
An RFID communication system comprising:
- a base station having a receiver and a transmitter;
- and
- an RFID tag adapted to communicate with the base station, the RFID tag including a substrate, an RF integrated circuit affixed to a first side of said substrate, and a hollow monopole antenna affixed to said first side of the substrate and connected to a terminal of the integrated circuit, wherein said hollowed monopole antenna comprises a planar surface having interior and exterior perimeter edges.
An RFID communication system comprising:
- a base station having a receiver and a transmitter;
- an RFID tag adapted to communicate with the base station, the RFID tag included a substrate, an RF integrated circuit affixed to a first side of said substrate, and a hollowed monopole antenna affixed to said first side of the substrate and connected to a terminal of the integrated circuit, wherein said hollowed monopole antenna comprises a planar surface having interior and exterior perimeter edges;
- and
- a transformer affixed to said first side of said substrate and to a second terminal of said integrated circuit.
An RFID communication system comprising:
- a base station having a receiver and a transmitter;
- and
- an RFID tag adapted to communicate with the base station, the RFID tag including a substrate, an RF integrated circuit affized to a first side of said substrate, and a hollowed monopole antenna to said first side of the substrate and connected to a terminal of the integrated circuit, wherein said monopole antenna comprises a planar surface having interior and exterior perimeter edges having a polygonal shape.
Dependencies are inferred from the claim text.