Methods, systems and apparatuses for radio frequency identification
First Claim
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1. A radio frequency identification (RFID) system, comprising:
- an enclosure comprising an at least partly closed structure defining a boundary between an interior region, interior to the structure, and an exterior of the structure, the structure having an inner surface facing the interior region and an outer surface facing the exterior; and
at least one feed configured for (1) generating an electromagnetic field in the interior region in response to a first signal received from an RFID reader via at least one radio frequency (RF) transmission line, and (2) receiving, from at least one RFID sensor located in the interior region, a second signal generated in response to the electromagnetic field,wherein at least a part of the outer surface is conductive or at least a portion of the inner surface is conductive, andwherein at least a portion of the structure is formed of an electromagnetically absorbing material.
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Abstract
A system for radio frequency identification (RFID) includes an enclosure defining an interior region interior to the enclosure, and a feed for generating an electromagnetic field in the interior region in response to a signal received from an RFID reader via a radio frequency (RF) transmission line and, in response to the electromagnetic field, receiving a signal from an RFID sensor attached to an item in the interior region. The structure of the enclosure may be conductive and may include a metamaterial portion, an electromagnetically absorbing portion, or a wall extending in the interior region. Related apparatuses and methods for performing RFID are provided.
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Citations
22 Claims
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1. A radio frequency identification (RFID) system, comprising:
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an enclosure comprising an at least partly closed structure defining a boundary between an interior region, interior to the structure, and an exterior of the structure, the structure having an inner surface facing the interior region and an outer surface facing the exterior; and at least one feed configured for (1) generating an electromagnetic field in the interior region in response to a first signal received from an RFID reader via at least one radio frequency (RF) transmission line, and (2) receiving, from at least one RFID sensor located in the interior region, a second signal generated in response to the electromagnetic field, wherein at least a part of the outer surface is conductive or at least a portion of the inner surface is conductive, and wherein at least a portion of the structure is formed of an electromagnetically absorbing material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A radio frequency identification (RFID) method, comprising:
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providing an enclosure, the enclosure comprising an at least partly closed structure defining a boundary between an interior region, interior to the structure, and an exterior of the structure, the structure having an inner surface facing the interior region and an outer surface facing the exterior; generating, by at least one feed, an electromagnetic field in the interior region in response to a first signal received from an RFID reader via at least one radio frequency (RF) transmission line; and receiving, by the at least one feed, a second signal generated in response to the electromagnetic field by at least one RFID sensor located in the interior region, wherein at least a part of the outer surface of the structure is conductive or at least a part of the inner surface of the structure is conductive, and wherein at least a portion of the structure is formed of an electromagnetically absorbing material. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification