RFID device with patterned antenna, and method of making
First Claim
1. A method of configuring a radio frequency identification (RFID) device antenna structure, the method comprising:
- identifying a low-current-flow portion of an antenna layout proposed for the antenna structure; and
placing a high effective resistance region in the low-current-flow portion, and low effective resistance regions in other portions of the antenna layout.
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Accused Products
Abstract
A radio frequency identification device (RFID) antenna structure includes electrically-conductive material. The antenna structure includes low effective resistance-material areas and high effective resistance areas in regions where there would be little current flow if there were more low effective resistance material. The high effective resistance areas may be spaces within the antenna structure in which there is substantially no electrically conductive material. Alternatively, high effective resistance material in the high effective resistance areas may have a non-zero lower electrical conductivity than the low effective resistance material in the low effective resistance-material areas. Conductive material for the antenna structure may include conductive ink. By reducing or eliminating the amount of conductive material in the high effective resistance areas, it will be appreciated that reduced-cost devices may be obtained.
61 Citations
53 Claims
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1. A method of configuring a radio frequency identification (RFID) device antenna structure, the method comprising:
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identifying a low-current-flow portion of an antenna layout proposed for the antenna structure; and placing a high effective resistance region in the low-current-flow portion, and low effective resistance regions in other portions of the antenna layout. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A radio frequency identification (RFID) device comprising:
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a substrate; an antenna structure on the substrate, wherein the antenna structure includes; a low effective resistance region; and a high effective resistance region having an electrical conductivity less than that of the low effective resistance; wherein the low effective resistance region substantially fully surrounds the high effective resistance region; and an RFID strap operatively coupled to the antenna structure. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A radio frequency identification (RFID) device comprising:
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a substrate; an antenna structure on the substrate, wherein the antenna structure with one or more antenna elements has a regular shape, where the antenna structure includes; a low effective resistance region; and a high effective resistance region having an electrical conductivity less than that of the low effective resistance; and an RFID strap operatively coupled to the antenna structure. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A method of configuring a radio frequency identification (RFID) device antenna structure layout, the method comprising:
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selecting an initial antenna structure layout, wherein the initial antenna structure layout includes a conductive element of conductive material, wherein the conductive element has a regular shape; and changing the effective resistance of a portion of the conductive element. - View Dependent Claims (40, 41, 42, 43, 44)
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45. A method of reducing cost of radio frequency identification (RFID) devices, the method comprising:
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selecting an initial antenna structure layout, wherein the initial antenna structure layout includes a conductive element of conductive material; and modifying a portion of the conductive element of the initial antenna structure layout to produce a modified antenna structure layout having a reduced cost associated therewith. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53)
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Specification