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:
Jul. 14, 2015
Filed:
Jan. 29, 2013
Applicant:
Amtech Systems, Llc, Albuquerque, NM (US);
Inventors:
Michael George Melville, Albuquerque, NM (US);
John Todd Elson, Albuquerque, NM (US);
Assignee:
Amtech Systems, LLC, Albuquerque, NM (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S 13/08 (2006.01);
U.S. Cl.
CPC ...
G01S 13/08 (2013.01);
Abstract
The a system for measuring distance between an RFID reader and tag, including an adaptive linear combiner, which is a tapped delay line with controllable weights on each tap, and outputs that are summed and subtracted from a reference to produce an error signal. After a sufficient number of cycles, the weight distribution indicates the delay of the received signal with respect to the reference, and by extension determines the distance between the tag and receiver.