RFID tag with enhanced readability
First Claim
1. An RFID device comprising:
- an antenna structure having a sheet of electrically conductive material extending on both sides of an elongated slot; and
a wireless communication device having a pair of contact points electrically coupled to respective parts of the conductive material;
wherein the parts of conductive material are electrically coupled together at a first end of the elongated slot distal from the wireless communication device;
wherein a second end of the elongated slot is an open end, not short-circuited between the parts;
wherein the elongated slot has a slot length in a direction in which the slot is elongated, and a slot width in a direction perpendicular to the slot length; and
wherein the parts of conductive material extending on the sides of the slot along the slot length have a combined antenna width in the direction of the slot width that is greater than the slot width of the slot.
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Accused Products
Abstract
A radio frequency identification (RFID) device includes a conductive antenna structure having an elongated slot therein. Parts of the antenna structure on both sides of one end of the elongated slot are coupled to a wireless communication device, such as an RFID chip or interposer. On the opposite end of the elongated slot, parts of the antenna structure at both sides of the elongated slot are electrically coupled together, for instance by being coupled together by other conductive parts of the antenna structure. All of the parts of the antenna structure may be parts of a continuous unitary layer of conductive material. The antenna structure with the elongated slot therein may facilitate increased readability of the RFID device, particularly in directions out from the edges of the RFID device.
120 Citations
44 Claims
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1. An RFID device comprising:
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an antenna structure having a sheet of electrically conductive material extending on both sides of an elongated slot; and a wireless communication device having a pair of contact points electrically coupled to respective parts of the conductive material; wherein the parts of conductive material are electrically coupled together at a first end of the elongated slot distal from the wireless communication device; wherein a second end of the elongated slot is an open end, not short-circuited between the parts; wherein the elongated slot has a slot length in a direction in which the slot is elongated, and a slot width in a direction perpendicular to the slot length; and wherein the parts of conductive material extending on the sides of the slot along the slot length have a combined antenna width in the direction of the slot width that is greater than the slot width of the slot. - 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, 25, 26, 27, 28, 29)
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30. An RFID device comprising:
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a continuous layer of conductive material with an elongated slot therein, wherein the elongated slot has an open end, with no conductive connection across the open end; and an RFID interposer with respective different contact points electrically coupled to the conductive material on respective opposite sides of the elongated slot; wherein the elongated slot has a slot length in a direction in which the slot is elongated, and a slot width in a direction perpendicular to the slot length; and wherein parts of conductive material extending on the sides of the slot along the slot length have a combined antenna width in the direction of the slot width that is greater than the slot width of the slot.
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31. A method of communicating with one or more of plural RFID devices, the method comprising:
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enhancing performance of the devices by bringing the RFID devices in close proximity to one another, wherein the enhancing performance includes increasing at least one of read distance for the devices or signal strength for the devices; and communicating with wireless communication devices of the one or more of the RFID devices; wherein each of the RFID devices includes; an antenna structure having electrically conductive material on both sides of an elongated slot; and one of the wireless communication devices, the wireless communication device having a pair of contacts electrically coupled to respective parts of the conductive material; and wherein the parts of conductive material are electrically coupled together at an end of the elongated slot distal from the wireless communication device. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. An RFID device comprising:
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an antenna structure having a sheet of electrically conductive material extending on both sides of an elongated slot; and a wireless communication device having a pair of contact points electrically coupled to respective parts of the conductive material; wherein the parts of conductive material are electrically coupled together at a first end of the elongated slot distal from the wireless communication device; wherein a second end of the elongated slot is an open end, not short-circuited between the parts; and wherein the parts are capacitively coupled together at the first end of the slot. - View Dependent Claims (44)
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Specification