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:
Oct. 25, 2005
Filed:
Apr. 02, 2003
Robert C. Allison, Rancho Palos Verdes, CA (US);
Brian M. Pierce, Moreno Valley, CA (US);
Robert C. Allison, Rancho Palos Verdes, CA (US);
Brian M. Pierce, Moreno Valley, CA (US);
Raytheon Company, Waltham, MA (US);
Abstract
A micro electro-mechanical system (MEMS) phase shifter for shifting the phase of a radio frequency (RF) signal. The phase shifter includes a quadrature coupler having an input port, an output port, a first load port and a second load port. A first variable reactance is coupled to the first load port and a second variable reactance is coupled the second load port. Each variable reactance has a plurality of reflecting phase shifting elements each having an associated micro electro-mechanical system (MEMS) switching element to individually and selectively couple the reflecting phase shifting element to the appropriate load port.