P1–15: Simulation and test of filter loaded three gap coupled output cavities

The real part of gap impedance reflect the bandwidth of the coupled output cavities. Group delay time also have some relation with the bandwidth. In the simulation, group delay time can be taken as a basic reference, then field analysis method was used to calculate the real part of total gap impedance, thus plenty of time can be saved. We also test the group delay time characteristic using the vector network analyzer and obtain a cold test result.