A transverse electromagnetic mode dielectric filter (1, 2, 3), comprising: a resonator (11, 21, 31), a dielectric body (12, 22, 32), and a metal housing (13, 23, 33), wherein - an outer surface of the dielectric body (12, 22, 32) is covered with a conductive material, the metal housing (13, 23, 33) is fastened above the dielectric body (12, 22, 32), and there is a gap between the metal housing (13, 23, 33) and the dielectric body (12, 22, 32); - the resonator (11, 21, 31) comprises a resonant plate (101, 201, 301) and a resonant hole (102, 202, 302), wherein the resonant plate (102, 202, 302) is disposed on a top surface of the dielectric body (12, 22, 32), the resonant hole (102, 202, 302) is a hollow cylindrical structure with openings on upper and lower ends, an upper opening of the resonant hole (102, 202, 302) is provided on the resonant plate (101, 201, 301), a lower opening of the resonant hole is provided on a lower surface of the dielectric body (12, 22, 32), an inner surface of the resonant hole (102, 202, 302) is covered with a conductive material, and the resonant plate (101, 201, 301) is of a metal material; and - the filter (1, 2, 3) further comprises a near-end rejection structure (14, 24, 34), wherein the near-end rejection structure (14, 24, 34) is inside the dielectric body (12, 22, 32), and a shape, a location, and a size of the near-end rejection structure (14, 24, 34) are configured according to a frequency of a signal that the filter (1, 2, 3) is to filter out; - the near-end rejection structure is a near high-frequency end-rejection structure or a near low-frequency end-rejection structure; - the near-end rejection structure (14, 24, 34) has at least two ends in contact with the lower surface of the dielectric body (12, 22, 32), and a remaining part of the near-end rejection structure (14, 24, 34) is within a magnetic field area inside the dielectric body or the near-end rejection structure (14, 24, 34) is within an electric field area inside the dielectric body (12, 22, 32); and - the near-end rejection structure (14, 24, 34) is any one of a metalized through hole, a metalized strip line, a physical metal structure, a metalized conductor, or a thin metal piece. - an outer surface of the dielectric body (12, 22, 32) is covered with a conductive material, the metal housing (13, 23, 33) is fastened above the dielectric body (12, 22, 32), and there is a gap between the metal housing (13, 23, 33) and the dielectric body (12, 22, 32); - the resonator (11, 21, 31) comprises a resonant plate (101, 201, 301) and a resonant hole (102, 202, 302), wherein the resonant plate (102, 202, 302) is disposed on a top surface of the dielectric body (12, 22, 32), the resonant hole (102, 202, 302) is a hollow cylindrical structure with openings on upper and lower ends, an upper opening of the resonant hole (102, 202, 302) is provided on the resonant plate (101, 201, 301), a lower opening of the resonant hole is provided on a lower surface of the dielectric body (12, 22, 32), an inner surface of the resonant hole (102, 202, 302) is covered with a conductive material, and the resonant plate (101, 201, 301) is of a metal material; and - the filter (1, 2, 3) further comprises a near-end rejection structure (14, 24, 34), wherein the near-end rejection structure (14, 24, 34) is inside the dielectric body (12, 22, 32), and a shape, a location, and a size of the near-end rejection structure (14, 24, 34) are configured according to a frequency of a signal that the filter (1, 2, 3) is to filter out; - the near-end rejection structure is a near high-frequency end-rejection structure or a near low-frequency end-rejection structure; - the near-end rejection structure (14, 24, 34) has at least two ends in contact with the lower surface of the dielectric body (12, 22, 32), and a remaining part of the near-end rejection structure (14, 24, 34) is within a magnetic field area inside the dielectric body or the near-end rejection structure (14, 24, 34) is within an electric field area inside the dielectric body (12, 22, 32); and - the near-end rejection structure (14, 24, 34) is any one of a metalized through hole, a metalized strip line, a physical metal structure, a metalized conductor, or a thin metal piece.