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:
Mar. 23, 1999
Filed:
Feb. 11, 1997
Rick L Sturdivant, Placentia, CA (US);
Raytheon Company, Lexington, MA (US);
Abstract
A lumped element circulator is provided in addition to a method for producing and flip mounting the circulator to a substrate. The resonant elements of the circulator are connected in either a delta or Y configuration which produces a three port electrical circuit. The fabrication technique associated with this invention allows the lumped element circulator to be manufactured in either a crossover or non-crossover style circulator. The circulator includes a ferrite layer having three inductors formed on its top surface to create either the delta or Y resonant element configuration. Contact bumps are attached at the terminal locations of the inductors. A magnet is secured to the bottom of the ferrite layer, forming a ferrite wafer. Optionally, a dielectric layer is disposed between the ferrite and the magnet. A plurality of capacitors and mounting pads are formed on a separate substrate by printing metal strips thereon. Once the ferrite wafer and substrate components are fabricated, the ferrite wafer is flipped over and the contact bumps are secured to the mounting pads.