A method of fabricating a radio frequency identification antenna on a substrate is disclosed. In accordance with one embodiment, a data storage device is provided having a circuit board and a connector for making a connection with an external interface. A cylindrical piston is disposed eccentrically and guided kinematically in the chamber and effects an oscillatory movement in the chamber as a result of the displacement of a volume of fluid. The region along the trench does not have a junction and may withstand the higher field strength.