Antenna-less RFID Tags Enable Use on Metal and Liquid-filled Containers
The invention is a low-profile, high-permeability antenna-less RFID tag for use on large metal objects and other objects for which traditional RFID technologies will not work. The approach is to incorporate high-permeability materials in the tag to create an impedance across a metal surface, such as a metal container, diverting current into the tag’s integrated circuit (IC). This type of tag is essentially ‘antenna-less’ as it uses the ground plane (the metal surface on which it is mounted) to excite currents through the IC. Tags using high-permeability materials in this manner are significantly thinner than those developed using other methods.
NDSU Research Foundation
Fargo, North Dakota
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