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:
Mar. 06, 2018
Filed:
Sep. 07, 2016
Applicant:
Rockwell Collins, Inc., Cedar Rapids, IA (US);
Inventors:
Kim S. Jepsen, Ellicott City, MD (US);
Raymond Zanoni, Columbia, MD (US);
Wenlu Chen, Clarksville, MD (US);
Assignee:
Rockwell Collins, Inc., Cedar Rapids, IA (US);
Primary Examiner:
Int. Cl.
CPC ...
H04J 14/02 (2006.01); H04B 10/516 (2013.01); H04B 10/50 (2013.01); H04B 10/61 (2013.01);
U.S. Cl.
CPC ...
H04B 10/5161 (2013.01); H04B 10/503 (2013.01); H04B 10/612 (2013.01); H04B 10/616 (2013.01); H04J 14/02 (2013.01);
Abstract
A system for optically down-converting a radio-frequency signal includes phase modulators in a push-pull configuration. Separately tuned optical bandpass filters pass through one or more harmonics and inverse harmonics based on the RF signal to produce a local oscillator. A balanced photo-detector receives a coherent interference signal and derives the down-converted local oscillator from a filtered harmonic and inverse harmonic.