Nanoelectromechanical microwave switch based on graphene

We assess the performance of graphene-based Nanoelectromechanical switches at microwave and millimeter waves. Simulations of a coplanar waveguide double-clamped graphene membrane capacitive switch, using realistic values of graphene conductivity, predict an isolation of 10 dB for monolayer and 20 dB for multilayer graphene over the frequency band from 1 GHz to 60 GHz. Isolation can be further improved by increasing the conductivity of graphene utilizing its electric field effect. Our result demonstrates that graphene could indeed be used for RF NEMS switches in applications where low-actuation voltage is required.