TM (Transverse Magnetic) mode dielectric filter

The embodiment of the invention discloses a TM (Transverse Magnetic) mode dielectric filter, which relates to the field of wireless communication and has the functions of effectively preventing a dielectric resonator from cracking and reducing the adverse influences, brought by cracking of the dielectric resonator, on the TM mode dielectric filter. The TM mode dielectric filter provided by the embodiment of the invention comprises a dielectric filter shell with an opening, a cover plate and at least one dielectric resonator, wherein the cover plate is arranged at the opening side of the dielectric filter shell; the dielectric resonator is arranged between the dielectric filter shell and the cover plate; the dielectric resonator takes the shape of a hollow cylinder; the outer surface of the dielectric resonator is provided with a first protection structure; and the first protection structure is closely jointed with the dielectric resonator.