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:
Dec. 28, 1999
Filed:
Jun. 20, 1997
Daniel Bobowicz, Elkridge, MD (US);
William B Yablon, Elkridge, MD (US);
Dennis A Grube, Ellicott City, MD (US);
Norman E Thurlow, Severna Park, MD (US);
Lawrence J Hunter, Linthicum, MD (US);
Jose A Coronado, Glen Burnie, MD (US);
Jeffrey J Dickstein, Ellicott City, MD (US);
Timothy M Fertiq, Pasadena, MD (US);
Alex E Bailey, Hampstead, MD (US);
John Chino, Arnold, MD (US);
Andrea Curbean, Baltimore, MD (US);
Tapan Gupta, Ellicott City, MD (US);
Ronnie L Starling, Columbia, MD (US);
Steven N Stitzer, Ellicott City, MD (US);
Herbert J Henderson, Laurel, MD (US);
Terry L Reeve, Annapolis, MD (US);
Robert G Schmier, Columbia, MD (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
A phased array includes a first plurality of radiators having a first polarization and a second plurality of radiators having a second polarization, different from said first polarization. The phased array is constructed such that radiating patterns of the first and second plurality of radiators are congruent. The radiators are constructed so that they radiating apertures thereof can occupy virtually the same space, i.e., the spacing of the radiating elements is less than a wavelength. Other features provided allow this compactness to be achieved. Impedance matching features are integrated into the radiators themselves. The elevation assemblies of the radiators are mated together, and then are coupled across to their respective azimuth assemblies. Two azimuth assemblies for either type of polarization may be provided when monopulse operation is required. Assemblies for both polarizations transmit sequentially, but receive simultaneously, thus allowing a complete polarization matrix to be collected with two pulse transmissions.