A high-power subterahertz surface wave oscillator with separated overmoded slow wave structures

Wang Guang-Qiang^{1, 2}, Wang Jian-Guo^{1, 3, †,}, Zeng Peng^{1, 2}, Wang Dong-Yang^{1, 2}, Li Shuang^{1, 2, 3}

Dependences of the efficiency and frequency on the length (a) and radius (b) of drift tube.