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:
Jan. 02, 2024
Filed:
Jun. 24, 2019
Amazon Technologies, Inc., Seattle, WA (US);
Leo Benedict Baldwin, Seattle, WA (US);
AMAZON TECHNOLOGIES, INC., Seattle, WA (US);
Abstract
Data about concentration of one or more types of molecules present within a human body are determined noninvasively using radio frequency signals. These signals generated at very low power levels are emitted and acquired using an antenna mounted to a wearable device. Information about changes to the signals is indicative of the concentration of one or more types of molecules within the user. The antenna includes two or more elements with a varying distance between them which reduces or eliminates power reflection and improves overall efficiency. The varying distance provides a first impedance at terminals of the antenna and a second impedance elsewhere on the antenna, such as midway along a long axis of the antenna. The first impedance matches an impedance of a transmitter output, a receiver input, or both. The second impedance results in the signal extending away from the antenna towards the user.