A microwave gain equalizer based on non-degenerate mode resonators

A gain equalizer is designed based on non-degenerate dual-mode sector cavities. Two orthogonal coupling slots are implemented to excite two non-degenerate modes in the cavity. One of the dual-mode frequencies can be tuned by perturbation via. And the positions of the film resistors loaded on the resonator are investigated to realize attenuations and Q-factor of the non-degenerate tuning independent. Compared with equalizers based on single-mode resonators, the proposed equalizer cuts in half the number of resonators, and it keeps the original performance, so it has more compact volume. The measured results are in good agreement with the simulated results.