Abstract: A dielectric filter includes a housing, a dielectric resonator, a cover plate, and a tuning structure. A resonant slot is disposed on the housing, a support portion is disposed in the resonant slot, and the support portion encloses to form an intermodulation groove at a slot bottom of the resonant slot. The dielectric resonator is mounted on the support portion and covers a groove opening of the intermodulation groove, multiple adjustment holes are disposed on the dielectric resonator, and the multiple adjustment holes communicate with the intermodulation groove. The cover plate is connected to the housing, covers an opening of the resonant slot, and is spaced apart from the dielectric resonator. The tuning structure is connected to the cover plate, where each of the multiple adjustment holes is configured with one tuning structure.

Abstract: Provided is a TM-mode dielectric filter including a housing, a support structure, a dielectric resonant rod, a cover plate, a buffer pad, and a plurality of tuning assemblies. A resonant cavity is disposed on the housing, the support structure is disposed on a bottom of the resonant cavity, one end of the dielectric resonant rod is mounted on the support structure, multiple adjustment holes are disposed on the dielectric resonant rod, the cover plate is connected to the housing and covers an opening of the resonant cavity, the buffer pad is disposed in the resonant cavity, covers another end of the dielectric resonant rod, and is sandwiched between the dielectric resonant rod and the cover plate, and the plurality of tuning assemblies is disposed on the cover plate, and each adjustment hole of the multiple adjustment holes is configured with a corresponding one of the plurality of tuning assemblies.

Abstract: A self-locking tuning assembly includes a tuning screw and a cover plate. The tuning screw includes a head portion and a rod portion. The head portion is provided with a first threaded portion and a second threaded portion. The cover plate defines an opening adapted to the tuning screw. The opening includes a first hole portion and a second hole portion that are communicated. The head portion is at least partially located in the first hole portion. The rod portion is at least partially located in the second hole portion. A hole diameter of the second hole portion is smaller than a hole diameter of the first hole portion. The self-locking tuning assembly improves its self-locking force and installation consistency while maintaining the structural strength thereof.

Abstract: A tuning structure for locking or releasing a tuning rod includes a cover plate, an adjustment member and an elastic element. The cover plate has a mounting hole. The adjustment member is rotatably engaged with a hole wall in the mounting hole. A first through hole is provided at a center of the adjustment member. The tuning rod passes through the mounting hole and the first through hole. The elastic element is disposed in the mounting hole. The tuning rod passes through the elastic element. One end of the elastic element abuts against the regulating member, and the other end of the elastic element abuts against the hole wall. By rotating the adjustment member, the elastic element can lock or release to the tuning rod. The present disclosure also discloses an electronic device having the tuning structure.

Abstract: A resonator includes a body shaft portion, a resonant disk portion and a coupling face portion. The body shaft portion has a top end and a bottom end. An inner cavity is slotted between the top end and the bottom end. The resonant disk portion is integrally formed on the top end. The coupling face portion is integrally formed on the bottom end. The body shaft portion includes a first outer surface and the coupling face portion includes a second outer surface. A first connecting arc surface is formed between the first outer surface and the second outer surface. The inner cavity has a central axis. In a transverse section perpendicular to the central axis, a wall thickness T of the body shaft portion is 0.5 mm˜1 mm and a first arc length R1 of the first connecting arc surface is no more than 0.25 mm.

Abstract: The embodiments of the disclosure discloses an cavity filter in which a sealed resonant cavity is formed by using an adjusting end cover and a body, and a positional relationship between the resonator and the adjusting end cover is changed by using a deformable adjusting end cover. Therefore, during the adjustment of the performance parameters of the cavity filter, the resonant cavity may be kept clean, so as to prevent metal debris or external dust from entering the resonant cavity and affecting the filtering performance of the cavity filter. The adjusting end cover is configured to be driven by the driving body to produce a deformation relative to the resonator. The parameter adjustment range of the cavity filter is improved, so that the cavity filter may adapt to more frequency bands, thereby improving the communication quality of the communication device.