The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 2008
Filed:
Feb. 04, 2005
Richard L. Copeland, Lake Worth, FL (US);
Stewart E. Hall, Wellington, FL (US);
William M. Farrell, West Palm Beach, FL (US);
Richard L. Copeland, Lake Worth, FL (US);
Stewart E. Hall, Wellington, FL (US);
William M. Farrell, West Palm Beach, FL (US);
Sensormatic Electronics Corporation, Boca Raton, FL (US);
Abstract
A core antenna system for use in electronic article surveillance (EAS) and radio frequency identification (RFID) systems. The core antenna system may include a core antenna. The core antenna may include a core, a first resonant winding disposed around at least a portion of the core, the first resonant winding having a first number of winding turns N, and a second non-resonant winding disposed around at least a portion of the core, the second non-resonant winding having a second number of winding turns N, the second number of turns greater than or equal to the first number of turns. The core antenna may be mounted on a shield plate and tuned to an operating frequency on the shield plate such that when the shielded core antenna is further mounted on a mounting surface, e.g., of a checkstand, no significant de-tuning of the antenna takes place.