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:
Oct. 20, 2020
Filed:
Jul. 30, 2018
Hand Held Products, Inc., Fort Mill, SC (US);
Pavel Nikitin, Seattle, WA (US);
Rene Martinez, Seattle, WA (US);
HAND HELD PRODUCTS, INC., Fort Mill, SC (US);
Abstract
Provided herein is an RFID reader system and method for determining an RFID tag distance. The RFID reader receives a first backscattered signal from an RFID tag in response to transmission of a first RF interrogation signal, and determines a first phase angle of the first backscattered signal. A radio transceiver device receives a second backscattered signal in response to transmission of a second RF interrogation signal, and determines a second phase angle of the second backscattered signal. A main control unit determines a plurality of first distances and a second distance between the RFID reader and the RFID tag based on the first phase angle and the second phase angle, and select one of the plurality of first distances with respect to the determined second distance as a final distance.