Patent ID: 8570705

Claim:
A MEMS tunable capacitor comprising: a primary stationary actuator electrode on a substrate; a secondary stationary actuator electrode on the substrate; a stationary RF signal capacitor plate electrode on the substrate; a sprung cantilever disposed over the substrate, the sprung cantilever comprising: a primary movable actuator electrode positioned over the primary stationary actuator electrode; a secondary movable actuator electrode positioned over the secondary stationary actuator electrode; a RF signal path that is electrically isolated from the primary movable actuator electrode and the secondary movable actuator electrode; and a movable RF signal capacitor plate in communication with the RF signal path and positioned over the stationary RF signal capacitor plate electrode; a beam anchor connecting a first end of the sprung cantilever to the substrate; and one or more elastic springs or other biasing members connecting a second end of the sprung cantilever to the substrate, the second end being located distally from the first end; wherein the sprung cantilever is movable between an OFF state defined by the potential difference between the stationary and moveable actuator electrodes being zero, and an ON state defined by a non-zero potential difference between the stationary and moveable actuator electrodes.