The present application provides a dielectric resonator, a dielectric filter, a base station and a method for fabricating the dielectric resonator or the dielectric filter. The dielectric resonator includes: a solid dielectric resonator body, a blind hole located on one side of the solid dielectric resonator body, a metalized layer covering both a surface of the solid dielectric resonator body and a surface of the blind hole, and a demetallized notch located at the metalized layer on the surface of the blind hole. The dielectric resonator provided in the present application can implement tuning of the dielectric resonator, and reduce impact on the resonance frequency of the dielectric resonator after the dielectric resonator is tuned, where the impact caused by that the demetallized notch is covered by a metal material in an assembly process of the dielectric resonator, and signal energy that is leaked from the notch is reduced.

There are provided a dielectric filter with excellent electrical characteristics, a duplexer, and a communication device using the dielectric filter. A dielectric filter includes a dielectric block provided with first through holes; inner conductors disposed on inner surfaces of the first through holes; second through holes; a terminal electrode connected to an inner conductor located at on end; a terminal electrode connected to an inner conductor located at the other end; and an outer conductor surrounding the dielectric block, being connected to a reference potential, wherein the first through holes are located on a second main surface side, and the second through holes are located on a first main surface side with respect to the first through holes. A duplexer and a communication device use this dielectric filter.

A dielectric contactless transmission device provided with a pair of wavelength dielectric resonance components (2, 3) having: dielectric blocks (20, 30) that have a first surface (20a), a second surface (20b), third to sixth surfaces (20c-20f) connecting the first surface (20a) and the second surface (20b), and a resonance hole (20g) for making the first surface (20a) and the second surface (20b) communicate; intra-resonance hole conductors (21, 31) covering the inner surface of the resonance hole (20g); external conductors (22, 32) covering the second surface (20b) and the third to sixth surfaces (20c-20f), the external conductors (22, 32) being connected to one end of the intra-resonance hole conductors; and coupling electrodes (23, 33) arranged on the first surface (20a) while being isolated from the external conductors (22, 32) and connected to the other end of the intra-resonance hole conductors (21, 31), the first surfaces (20a) being arranged facing each other so that the coupling electrodes (23, 33) of the pair of wavelength dielectric resonance components (2, 3) are capacitively coupled.

A combination RF filter and printed circuit board assembly wherein the RF filter is defined by a block of dielectric material including at least first and second side surfaces. A metal bracket with a plurality of fingers is secured to each of the first and second side surfaces. The fingers on the brackets extend through respective apertures in the printed circuit board and are soldered to the printed circuit board. The brackets relieve and transfer the thermal and mechanical stresses that result from use of a filter and printed circuit board that are made of materials with different thermal and mechanical characteristics and reduce the risk of cracking or damage to the filter, the printed circuit board, and the solder joints during use.

The present invention provides a novel dielectric filter, which comprises a dielectric body, N+4 through holes, and an end surface metal layer, wherein the end surface metal layer comprises a first metal block, a second metal block, N middle metal blocks, a penultimate metal block, a last metal block, a first metal sideline, a second metal line segment, a third metal line segment, a fourth metal line segment, and a fifth metal line segment; the first metal block, the second metal block, the N middle metal blocks, the penultimate metal block and the last metal block are respectively formed on peripheral sides of a first resonance hole, a second resonance hole, N middle resonance holes, a penultimate resonance hole and a last resonance hole.

Embodiments of this application provide a dielectric filter and a communication device. The dielectric filter includes: a dielectric body, a first blind via and a second blind via that are provided in the dielectric body, a through hole located between the first blind via and the second blind via, and an insulating portion, where inner walls of the first blind via, the second blind via, and the through hole each are covered with a metal layer, and an outer surface of the dielectric body is covered with a metal layer; and the insulating portion is implemented by not covering a metal layer on a surface of the dielectric body, and the insulating portion partially surrounds the through hole.

The present invention relates to a dielectric ceramic filter including a dielectric block filled with a ceramic material and having an outer surface surrounded by a metal component, a resonance part provided in the dielectric block, having a space having a circular horizontal cross-section, and separated from the dielectric block by a metal film, and a tuning cover coupled to the dielectric block, configured to cover one side of the resonance part, and positioned at a portion corresponding to the resonance part, the tuning cover being configured to tune a frequency of the resonance part by being deformed in shape corresponding to a space of the resonance part, thereby increasing a production yield and implementing a high Q value when the volume remains the same.

An antenna filter unit and a base station having the antenna filter unit are disclosed. The antenna filter unit according to an embodiment comprises a dielectric body that defines a plurality of single-mode resonators each including a tuning hole. At least one slot is formed on a surface of the dielectric body to serve as an antenna radiator. The at least one slot is coupled to at least one of the resonators.

The disclosure relates to a 5.sup.th generation (5G) or pre-5G communication system for supporting a higher data transfer rate than a 4.sup.th generation (4G) communication system, such as long-term evolution (LTE). An antenna module is provided. The antenna module includes a filter for filtering a radio frequency (RF) signal, and a sub printed circuit board (PCB), the sub-PCB comprises a passive circuit for processing the RF signal, and, the sub-PCB may be coupled to the filter such that the filter operates as a bumper when being coupled to a filter board.

A ceramic dielectric band-pass filter includes a ceramic base, a first input and output electrode, and a second input and output electrode. The ceramic base includes an open surface, a short-circuit surface, and an IO surface. The ceramic base includes first resonant cavities and second resonant cavities penetrating the ceramic base. The first resonant cavities are arranged between the second resonant cavities and are arranged along a length direction of the ceramic base. The first input and output electrode and the second input and output electrode are arranged on the IO surface and extend to the open surface. The first input and output electrode, the second input and output electrode, and the first resonant cavities are coupled to form a sixth-order band-pass filter. The first input and output electrode and the second input and output electrode are coupled with the second resonant cavities to form notch filters.