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1. (WO2018125977) RFID TAGS WITH SHIELDING STRUCTURE FOR INCORPORATION INTO MICROWAVABLE FOOD PACKAGING

Pub. No.:    WO/2018/125977    International Application No.:    PCT/US2017/068659
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Fri Dec 29 00:59:59 CET 2017
IPC: G06K 19/077
B65D 81/34
G06K 19/07
Applicants: AVERY DENNISON RETAIL INFORMATION SERVICES, LLC
Inventors: FORSTER, Ian, J.
HOWARD, Norman
CUMBY, Brad
ORLOWSKI, James
STROHMEIER, Brian
DUAN, Hu
HIGGINS, Cameron
FELTZ, John
Title: RFID TAGS WITH SHIELDING STRUCTURE FOR INCORPORATION INTO MICROWAVABLE FOOD PACKAGING
Abstract:
RFID tags are provided for incorporation into the packaging of a microwavable food item, with the RFID tag being configured to be safely microwaved. The RFID tag includes an antenna defining a gap and configured to operate at a first frequency. An RFID chip is electrically coupled to the antenna across the gap. A shielding structure is electrically coupled to the antenna across the gap and overlays the RFID chip. The shielding structure includes a shield conductor and a shield dielectric at least partially positioned between the shield conductor and the RFID chip. The shielding structure is configured to limit the voltage across the gap when the antenna is exposed to a second frequency that is greater than first frequency. The RFID tag includes an RFID chip and an antenna electrically coupled to the RFID chip.