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:
Sep. 22, 2020
Filed:
Dec. 27, 2018
Fujitsu Frontech North America Inc., Foothill Ranch, CA (US);
Herbert Markman, Wynnewood, PA (US);
Aaron Teter, King of Prussia, PA (US);
Jeffrey Markman, Narberth, PA (US);
Shinichi Nagayumi, Bryn Mawr, PA (US);
Daniel G. Dalton, Laguna Beach, CA (US);
Fujitsu Frontech North America Inc., Foothill Ranch, CA (US);
Abstract
An RFID portal reads multiple associated RFID tags on articles in groups moved through an RFID code reader having interrogation/charging and receiving/detection antennas concentrated on the group when in a reading zone. The articles are movable through a passage between the reading zone and an outside area. The passage has conductive walls at the reading zone associated with antennas for applying and collecting focused RF signals, and the walls define a vestibule lined with broadband or specific stopband electromagnetic damping structures as well as elongating signal paths into and/or out of the reading zone. Attenuation by one or more of broadband and stopband damping and signal path elongation can achieve 10 dB attenuation or more, sufficient to minimize interaction with stray RFID tagged articles that may be outside of the group in the reading zone.