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:
Mar. 28, 2017
Filed:
Jun. 24, 2014
Amazon Technologies, Inc., Reno, NV (US);
Seng Chin Tai, Rocklin, CA (US);
Chun Kit Lai, Cupertino, CA (US);
Adrian Napoles, Cupertino, CA (US);
AMAZON TECHNOLOGIES, INC., Seattle, WA (US);
Abstract
The range of a Near Field Communications (NFC) in an electronic device is boosted by positioning a magnet near the center of a spiral loop NFC antenna. The magnet interacts with a modulated magnetic field generated by the antenna, concentrating the power of the modulated field. The magnet may be part of another component of the device, such as a magnet in the zoom mechanism of a camera. If the electronic device has a metal case, performance of the NFC antenna is further enhanced by including an opening through the metal over an axis of the magnet and a segment of the antenna's spiral loop, and by extending the opening to eliminate a parasitic current pathway around the antenna. The extended opening in the metal case significantly reduces the effect of eddy currents generated in the housing that counter the NFC magnetic field.