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:
Aug. 31, 2004
Filed:
Aug. 21, 2002
Robert C. Allison, Rancho Palos, CA (US);
Jerold K. Rowland, Torrance, CA (US);
Ron K. Nakahira, Buena Park, CA (US);
Raytheon Company, Waltham, MA (US);
Abstract
A method for the design of tunable filters is disclosed. MEMS switches are used to alter the resonant frequency of one or more resonators. By tuning the resonant frequency of the resonators, the filter's characteristics also are tuned. Furthermore, MEMS switches are used to alter the input coupling, including direct input coupling and capacitive input coupling. Direct input coupling is altered by using the MEMS switches to select different input connection points. Capacitive input coupling is altered by using MEMS switches to add additional input capacitance to an input coupling capacitor.