High frequency transmission properties of graphene monolayer with different coplanar waveguide electrode configurations

We present the transmission properties of graphene monolayer for three different coplanar waveguide electrode configurations at microwave frequencies. It is confirmed that the transmission level can be dependent on the ground shape due to electromagnetic coupling effect between graphene and ground pad in the CPW electrode. Among the three CPW electrodes with and without graphene, the CPW electrode having a deep ground pad shows the most superior transmission characteristics. From the resultant, we know that it is very important to consider the graphene as well as RF electrode design for the desired transmission level.