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:
Nov. 22, 2022
Filed:
Nov. 06, 2020
Chairge Llc, Wilmington, DE (US);
Alexander T. Farkas, Chatham, MA (US);
CHAIRGE LLC, Wilmington, DE (US);
Abstract
A wireless charging system concurrently charges several wireless devices within a shielded chamber acting as a hollow electromagnetic waveguide. Electrically conductive walls of the chamber create transverse modes that support longitudinal propagation of the electromagnetic field along the waveguide with no diminution of the energy flux density due to the inverse-square law. A transmitting antenna located inside the chamber emits an electromagnetic field that excites one or more transverse modes of the waveguide. An absorptive lid absorbs the electromagnetic field to minimize reflections that could excite longitudinal modes. Each wireless device includes a whisker antenna that receives part of the electromagnetic field for charging a battery. Due to the spatial uniformity of the electromagnetic field, the wireless devices charge with high efficiency regardless of their positions, ensuring they all charge at a similar rate.