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:
Apr. 28, 1992
Filed:
Aug. 09, 1990
Risto Siikarla, Boca Raton, FL (US);
Douglas A Narlow, Coral Springs, FL (US);
Sensormatic Electronics Corporation, Deerfield Beach, FL (US);
Abstract
A method for detection of EAS tags in a surveillance area into which an electrostatic field is propagated and in which an electronically conductive object is present, includes a step of providing a tag reradiator configuration which is unaffected by close proximity to the object. The step is practiced by configuring the tag reradiator as a first part of a monopole, the object being used as a further part of the monopole, and by disposing the first monopole part beyond the outside perimeter of the conductive environment. The tag reradiator is further configured to define a part of a dipole, the object being used as a further part of the dipole. In an alternative practice, the tag reradiator includes a ground plane member and itself defines such monopole and dipole. In the former practice, the tag reradiator is electrically connected with the object. In the latter practice, the tag reradiator is affixed to the object in electrical isolation therefrom.