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:
Aug. 19, 2008
Filed:
Mar. 12, 2004
Cheri A. Anaclerio, Baltimore, MD (US);
Christopher R. Vale, Elkridge, MD (US);
Cheri A. Anaclerio, Baltimore, MD (US);
Christopher R. Vale, Elkridge, MD (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
A method for determining a filter that is very selective and having linear phase is described. The method starts with choosing a pole constellation in the complex frequency plane in a unique manner so that a desired passband phase of the filter is linear while preserving the desired magnitude. The method seeks to design filters that have ideal responses in both gain and phase or gain and time. This process is done methodically by finding locations of poles that yield sensible compromises between the extremes. It also makes full use of well-known traditional characteristics of the filters at the extremes.