RFID tags having improved read range

Details RFID tags having improved read range RFID tags having improved read range

2008-05-20

2008-05-20

Mullen, Thomas (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C235S492000, C428S615000

Reexamination Certificate

active

11390032

ABSTRACT:
The present invention provides a system and method for optimizing the performance of 13.56 MHz frequency RFID tags in conjunction with metal substrates. Briefly, a thickness exists for each type of RFID isolator material at which the performance of a 13.56 MHz RFID tag is optimal when used with metal. Varying from this optimal value, in either the positive or negative direction adversely affects read distance. A method of determining this optimal thickness is disclosed, as well as an RFID tag or a substrate being used in conjunction with a material of this thickness.

REFERENCES:
patent: 5241299 (1993-08-01), Appalucci et al.
patent: 5912622 (1999-06-01), Endo et al.
patent: 7064668 (2006-06-01), Porad
patent: 2005/0083203 (2005-04-01), Surkau
patent: 2006/0109124 (2006-05-01), Dixon et al.
patent: 10204884 (2003-08-01), None

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