Metal container closure having integral RFID tag

An RFID tag system for communication with a base station at a predetermined frequency comprising:

• a metal bottle cap having an interior surface, an exterior surface, and an electrical feedthrough connection from said interior surface to said exterior surface;
• an insulator mounted to an exterior surface of said metal bottle cap;
• a patch antenna mounted to said insulator and coupled to said electrical feedthrough connection at an exterior point, said patch antenna tuned to said predetermined frequency;
• and
• an RFID IC chip mounted on an interior surface of said metal bottle cap and coupled to said patch antenna via said feedthrough connection and to said metal bottle cap.

An RFID tag system which communicates with a base station at a predetermined frequency for a container having a metal closure comprising:

• an insulator adapted to be mounted to a metal surface of said metal closure;
• and
• a radio transceiver system-mounted on said insulator comprising
• antenna tuned to said predetermined frequency, said antenna including an asymmetrical slot positioned off-center therein;
• and
• an RFID IC chip electrically coupled to said antenna and electrically coupled to said metal closure.

An RFID tag system for communication with a base station at a predetermined frequency comprising:

• a metal bottle cap having an interior surface, an exterior surface, and an electrical feedthrough connection from said interior surface to said exterior surface;
• an insulator mounted on an exterior surface of said metal bottle cap;
• a patch antenna mounted on said insulator and electrically coupled to said electrical feedthrough connection, said patch antenna tuned to said predetermined frequency;
• and
• an RFID IC chip mounted on an interior surface of said metal bottle cap and electrically coupled to said patch antenna via said feedthrough connection and electrically coupled to said metal bottle cap.