Simulation study on atmospheric pressure microwave plasma torch

An atmospheric pressure microwave plasma torch(MPT) operating at 2.45 GHz was designed. Corresponding simulation based on HFSS code was performed and the influences of structure parameters on the E-field distribution in the device were analyzed. The results indicate that the use of coupling probe will have a distinct impact on the field distribution in the device. A MPT with strong electric field amplitude and high Q-factor about 20 000 was achieved in simulation by adjusting the structure parameters, which could produce microwave plasma at atmospheric pressure.