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:
Sep. 09, 2003
Filed:
Feb. 15, 2002
Applicant:
Inventors:
Lynette M. Jones, Randallstown, MD (US);
Patrick J. Knowles, Severn, MD (US);
Assignee:
Northrop Grumman Corporation, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P 1/20 ; H01P 1/203 ;
U.S. Cl.
CPC ...
H01P 1/20 ; H01P 1/203 ;
Abstract
A hybrid filter element includes an impedance transformer and a phase cancellation loop having a first portion and a second portion is disclosed. The first and second portions are designed to provide a phase difference between the two portions of about 180° at a mid-band frequency. The first portion forms part of the impedance transformer and is typically smaller than the second portion. The first and second portions can be designed to have either an equal power split or an unequal power split between the portions.