Patent ID: 8018307
Filing Date: 2011-09-13
Classification: H01G,H01H

Abstract:
1. An electronic device comprising a microelectromechanical system (MEMS) element, the element comprising first and second electrodes wherein the first electrode has a surface area larger than that of the second electrode to improve isolation and an intermediate beam with first and second opposing conductive side faces, the first side face facing the first electrode and the second side face facing the second electrode, which beam is movable by application of a driving voltage between said first and second electrodes, wherein the beam is embodied as a third electrode wherein the third electrode is substantially elastic, such as to be attachable with a first surface area at one edge to the second electrode and with a second surface area at an opposite edge to the first electrode, and such that on application of an actuation voltage the ratio of first to second surface area is changeable; and characterized in that: the second electrode and the second conductive side face of the beam form with an intermediate dielectric a first switchable capacitor that is connected in a signal path between an input and an output, and the first electrode and the first side face of the beam form with an intermediate dielectric a second switchable capacitor, that is coupled from the signal path to ground.