AbstractThe purpose of this paper is to study and design a non-thermal dielectric barrier discharge generator generated by a dc power supply, by designing two different geometries of the electrode. One is a planar electrode model, and the other is a plasma jet model. The design is to study and compare the two types of plasma models with analyzing discharge voltage and current waveforms. From the experimental result, arc discharge usually occurred at the corner of planar electrode model while the plasma jet model could be operated in the stable glow discharge mode. The plasma characteristics were controlled by modifying the value of the electrode gap distance, source voltage, and gas flow rate. The discharge waveforms were dependent on the electrode gap distance and the voltage of the power supply. At a stable supply voltage, the size and intensity of plasma increased with the increasing of the gas flow rate.