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. 17, 2005
Filed:
Sep. 09, 2003
James R. Hager, Golden Valley, MN (US);
Jens M. Henrickson, St. Paul, MN (US);
Lavell Jordan, Bloomington, MN (US);
Curtis J. Petrich, Minneapolis, MN (US);
James R. Hager, Golden Valley, MN (US);
Jens M. Henrickson, St. Paul, MN (US);
Lavell Jordan, Bloomington, MN (US);
Curtis J. Petrich, Minneapolis, MN (US);
Honeywell International Inc., Morristown, NJ (US);
Abstract
An in-phase/quadrature component (IQ) mixer is configured to reject returns from a negative doppler shift swath in order to mitigate corruption of returns of a positive doppler shift swath. The mixer includes a sample delay element which produces a quadrature component from the in-phase component of an input signal. Further included are a plurality of mixer elements, a plurality of low pass filters, a plurality of decimators, and a plurality of all pass filters which act upon both the in-phase and quadrature components of the input signal. Also, a subtraction element is included which is configured to subtract the filtered and down sampled quadrature component from the filtered and down sampled in-phase component.