Radio frequency identification shelf antenna with a distributed pattern for localized tag detection
First Claim
1. A radio frequency identification (RFID) antenna system for detecting RFID tags on a display structure, comprising:
- an antenna having an elongated conductor extending from a feeding point to a grounding point in a configuration that defines at least two loops and that has at least two conductor sections crossing each other at an intersection location between two adjacent loops;
a dielectric interposed between the conductor sections at the intersection location; and
a reflective plane attached to the display structure;
the antenna being attached to the display structure and having a location at a position on the display structure in relation to the reflective plane that allows the antenna to have a directional longitudinal radiation pattern that radiates into an area of the display structure that is configured to support a displayed item with an attached RFID tag.
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Accused Products
Abstract
In accordance with the teachings described herein, an RFID antenna system is provided for detecting RFID tags on a display structure. The antenna system may include an antenna having an elongated conductor extending from a feeding point to a grounding point in a configuration that defines at least two loops and that has at least two conductor sections crossing each other at an intersection location between two adjacent loops, with a dielectric interposed between the conductor sections at the intersection location. The antenna may be attached to the display structure and may be located at a position on the display structure in relation to a reflective plane that allows the antenna to have a directional longitudinal radiation pattern that radiates into an area of the display structure that is configured to support a displayed item with an attached RFID tag.
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Citations
43 Claims
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1. A radio frequency identification (RFID) antenna system for detecting RFID tags on a display structure, comprising:
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an antenna having an elongated conductor extending from a feeding point to a grounding point in a configuration that defines at least two loops and that has at least two conductor sections crossing each other at an intersection location between two adjacent loops; a dielectric interposed between the conductor sections at the intersection location; and a reflective plane attached to the display structure; the antenna being attached to the display structure and having a location at a position on the display structure in relation to the reflective plane that allows the antenna to have a directional longitudinal radiation pattern that radiates into an area of the display structure that is configured to support a displayed item with an attached RFID tag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A radio frequency identification (RFID) system, comprising:
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a display structure having a plurality of display areas and including a plurality of RFID antennas with an RFID antenna being disposed on the display structure in relation to each display area; each RFID antenna having an elongated conductor extending from a feeding point to a grounding point in a configuration that defines at least two loops and that has at least two conductor sections crossing at an intersection location between two adjacent loops with a dielectric disposed between the conductor sections at the intersection location; the display structure further including a reflective plane that is attached to the display structure at a position in relation to the plurality of antennas that allows each antenna to have a directional longitudinal radiation pattern that radiates into its respective display area. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A radio frequency identification (RFID) system, comprising:
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a display structure having a first side and a second side, the first side of the display structure including one or more first display areas and including a first RFID antenna that is disposed on the display structure in relation to the one or more first display areas, the second side of the display structure including one or more second display areas and including a second RFID antenna that is disposed on the display structure in relation to the one or more second display areas, the first and second RFID antennas each having an elongated conductor extending from a feeding point to a grounding point in a configuration that defines at least two loops and that has at least two conductor sections crossing at an intersection location between two adjacent loops with a dielectric disposed between the conductor sections at the intersection location; the display structure further including one or more reflective planes that isolate the first RFID antenna from the second RFID antenna. - View Dependent Claims (42, 43)
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Specification