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:
May. 27, 2025
Filed:
May. 23, 2023
Fairwinds Technologies, Llc, Annapolis, MD (US);
Pavlo Bobrek, Bradenton, FL (US);
Keith Adams, Lake Ronkonkoma, NY (US);
Glenn Link, Odenton, MD (US);
Timothy Hillner, Middletown, DE (US);
Fairwinds Technologies, LLC, Annapolis, MD (US);
Abstract
A device and method for estimating the frequency difference between antennas having asynchronized local oscillator references includes a frequency meter configured for connection with radio frequency signals from two antennas and configured to output a measured frequency difference between baseband filtered signals of two antennas. The frequency meter includes a phase meter, a quadrant transition, and a frequency meter counter. The phase meter receives in-phase and quadrature pairs of filtered signals and output a phase difference between the pairs. The quadrant transition state machine receives the phase difference, detects a quadrant associated with the phase difference, and detects a change between the detected quadrant and a previously detected quadrant. The frequency meter counter then accumulates the quadrant transitions and direction over a desired interval to establish a measure of the frequency difference between the two radio frequency signals input into phase meter.