Fig. 1. Simulation model of the coupling system

Fig. 2. (a) Equivalent circuit of a one-port-coupled cavity and (b) equivalent circuit of a coupling tuner T_c inserted into the waveguide

Fig. 3. Equivalent circuit of a tuning system

Fig. 4. (a) Resonant frequency and coupling factor at different h_ctuner and (b) resonant frequency and coupling factor at different h_ftuner

Fig. 5. The S₁₁-parameter curves at different h_ctuner (a) and h_ftuner(b)

Fig. 6. Electric field distribution of the dipole in the cavity along the circumference