Dielectric filter and communication device

A communication device comprising a dielectric filter, the dielectric filter comprising:

• at least two dielectric resonators connected to each other, each dielectric resonator of the at least two dielectric resonators comprising:
• a dielectric body;
• and
• a resonant cavity;
• the dielectric body comprising:
• a top surface and a bottom surface along a first direction Z of the dielectric filter, the resonant cavity running through the top surface or the bottom surface;
• and
• a first side surface and a second side surface along a second direction Y of the dielectric filter;
• and
• at least one hole group disposed between two adjacent dielectric resonators of the at least two dielectric resonators, each hole group of the at least one hole group comprising a first hole and a second hole, two ends of the first hole run through the top surface and the bottom surface respectively, and the second hole runs through at least one of the first side surface or the second side surface;
• wherein projections of the first hole and the second hole intersect along a third direction X of the dielectric filter.