Cylindrical coaxial T TM₈₁₂ mode cavity resonator for millimeter wave multi-beam klystron

Energy exchange efficiency of clustering electron beams passing through a cylindrical coaxial TM812 mode cavity resonator is studied, as well as the extraction method of microwave energy from the cavity resonator. The feasibility of the cavity resonator being used as the output cavity of the millimeter wave multi-beam klystron is also demonstrated. The results show that the energy exchange efficiency can reach 3.29% for ideal clustering electron beams and 1.84% for general beams. It is found that microwave energy could be extracted from the cavity resonator by coupling the cavity resonator with an axial coaxial-line. When working frequency of the output cavity is 100.945 GHz and the external quality factor equals to 2 243, the maximal output power can be up to 15 kW according to