Dennis A Grube

US Patent:

60087757, Dec 28, 1999

Filed:

Jun 20, 1997

Appl. No.:

8/880114

Inventors:

Daniel Bobowicz - Elkridge MD
William B. Yablon - Elkridge MD
Dennis A. Grube - Ellicott City MD
Norman E. Thurlow - Severna Park MD
Lawrence J. Hunter - Linthicum MD
Jose A. Coronado - Glen Burnie MD
Jeffrey J. Dickstein - Ellicott City MD
Timothy M. Fertiq - Pasadena MD
Alex E. Bailey - Hampstead MD
John Chino - Arnold MD
Andrea Curbean - Baltimore MD
Tapan Gupta - Ellicott City MD
Ronnie L. Starling - Columbia MD
Steven N. Stitzer - Ellicott City MD
Herbert J. Henderson - Laurel MD
Terry L. Reeve - Annapolis MD
Robert G. Schmier - Columbia MD

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H01Q 1310

US Classification:

343853

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.

US Patent:

58765395, Mar 2, 1999

Filed:

Jun 17, 1997

Appl. No.:

8/877379

Inventors:

Alex E. Bailey - Hampstead MD
John Chino - Arnold MD
Dennis Grube - Ellicott City MD
Andrea Curbean - Baltimore MD
Tapan Gupta - Ellicott City MD
Ronnie L. Starling - Columbia MD

Assignee:

Northrop Grumman Corporaiton - Los Angeles CA

International Classification:

B32B 3126
H01P 1195

US Classification:

156 8916

Abstract:

A method of fabricating ferrite toroids used in ferrite phase shifters. The method employs fabrication techniques found in low temperature cofired ceramics (LTCC) tape technology and involves fabricating long rectangular through-holes, as is required by the toroid design, in layers of green ceramic tape and maintaining the integrity of the through-holes during a firing process wherein ferromagnetic ceramic oxide in the tape is converted to ferrite.