Fig. 1. Schematic diagram of a relativistic extended interaction klystron oscillator

Fig. 2. Normalized electric field distribution and electron conductivity

Fig. 3. Working mode of extraction cavity

Fig. 4. Schematic diagram of RF electric field and output power comparison

Fig. 5. Comparison of power drop of the electron beam in the extraction cavity

Fig. 6. Parameter analysis of the output waveguide coupling loop

Fig. 7. Sensitivity analysis of magnetic fields and voltages

Fig. 8. Three-dimensional electric field distribution

Fig. 9. S parameters of TEM and TE₁₁ modes

Fig. 10. S-parameters of the new reflector TEM mode and TE₁₁ mode

Fig. 11. Schematic diagram of the axial electric field of the cross-section