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:
May. 10, 2022
Filed:
Nov. 27, 2015
Sato Holdings Kabushiki Kaisha, Tokyo, JP;
Markus Frank, Stråvalla, SE;
Mats Hedberg, Varberg, SE;
SATO HOLDINGS KABUSHIKI KAISHA, Tokyo, JP;
Abstract
The present invention broadly relates to a multi-layer electromagnetic coupler arrangement, for encoding an RFID tag, suitable for being used in a printing device. The coupler arrangement employs a differential transmission line loop, as a coupling element arranged on a top surface layer of the multi-layer arrangement, which is arranged close to a metallic ground plane layer for shielding on the side opposite the top surface. Coupling is achieved by inductive coupling in the reactive near field and based on the fact that each RFID tag comprises a current loop, itself. The differential property of the transmission line loop is achieved by feeding the terminals of the loop with signal parts having a phase shift of 180° with respect to each other. The feeding components are arranged on the opposite side of the ground plane with respect to the top surface layer comprising the current loop. It is possible to arrange plural differential transmission line loops on the top surface layer, in form of a one-or two-dimensional array.