Deformed spherical waveguide resonator, filter based on same and processing method of filter

The invention discloses a deformed spherical waveguide resonator, a filter based on the deformed spherical waveguide resonator and a processing method of the filter. The wide stopband suppressed filter structure based on the deformed spherical waveguide resonator comprises a waveguide flange plate, a second waveguide flange plate and five directly coupled deformed spherical waveguide resonant cavities. Through changing the arrangement mode of the five deformed spherical waveguide resonant cavities, a coupling direction between the adjacent resonant cavities is rotated for 90 degrees, so that the coupling component of a high-order mode is reduced; through processing depressions in the top surface and bottom surface of the spherical waveguide resonator to increase the frequency interval of the high-order mode and a base mode, the wider spurious-free stopband is achieved, the resonant cavities have the different high-order modes due to the depressions with different depth of the resonantcavities, and thus spurio