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:
Jan. 18, 2005
Filed:
Sep. 04, 2002
Robert B. Lombardi, Brockton, MA (US);
Joseph S. Pleva, Londonderry, NH (US);
Landon Rowland, Westford, MA (US);
Paul Setzco, Wellesley, MA (US);
Robert B. Lombardi, Brockton, MA (US);
Joseph S. Pleva, Londonderry, NH (US);
Landon Rowland, Westford, MA (US);
Paul Setzco, Wellesley, MA (US);
Raytheon Company, Waltham, MA (US);
Abstract
A radio frequency (RF) circulator includes a low temperature co-fired ceramic (LTCC) substrate and a ferrite structure disposed in the LTCC substrate. The circulator also includes first, second and third transmission lines disposed in the LTCC substrate and coupled between the ferrite disk and first, second and third ports of the circulator. The ferrite structure embedded in the LTCC substrate is exposed to an appropriate direct current (DC) magnetic field, to provide the circulator as an integrated LTCC substrate circulator.