To optimize the dielectric barrier discharge（DBD） reactor structure and improve discharge efficiency

the DBD characteristics of tube-tube electrode and tube-plate electrode in atmosphere are experimentally studied.Their voltage and current waveforms

Lissajous figures and light emission pictures are compared

the change of discharge parameters with applied voltage are investigated

and the experimental results are explained on the basis of the discharge mechanism.The conclusions include that: the electrical characteristics and light-emission properties of DBD of the two electrodes are quite different

for tube-plate electrode the DBD is more stable

and the distribution of discharge filaments is more uniform compared with tube-tube electrode;The DBD duration

current amplitude

power and transferred charge of these two electrodes all increase with the increase of applied voltage

and at same applied voltage

all the parameters of tube-plate electrode DBD are larger than that of tube-tube electrode DBD.