Gao Peng, Booske John H., Yang Zhong-Hai, Li Bin, Xu Li, He Jun, Gong Yu-Bin, Tian Zhong. Physics and simulation of terahertz folded waveguide traveling wave tube regenerative feedback oscillatorsJ. Acta Physica Sinica, 2010, 59(12): 8484-8489. DOI: 10.7498/aps.59.8484