1. Institute of Applied Electroagnetics (IAEM), College of Electronics and Information Engineering, Sichuan University, Chengdu, China
2. School of Electronic and Communication Engineering, Guiyang University, Guiyang, China
3. State Key Laboratory of Oral Diseases and the National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
4. Laboratoire Plasma et Conversion d'Energie (LAPLACE), INPT-ENSEEIHT, University of Toulouse, Toulouse, France