RFID tag employing hollowed monopole antenna
First Claim
Patent Images
1. 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.
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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.
193 Citations
18 Claims
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1. An RF tag comprising:
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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. - View Dependent Claims (8, 9)
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2. An RF tag comprising:
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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. - View Dependent Claims (3, 5)
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4. An RF tag comprising:
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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. - View Dependent Claims (6, 7)
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10. An RFID communication system comprising:
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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. - View Dependent Claims (17, 18)
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11. An RFID communication system comprising:
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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. - View Dependent Claims (12)
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13. An RFID communication system comprising:
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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. - View Dependent Claims (14, 15, 16)
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Specification