Disclosed are embodiments of ceramic radiofrequency filters advantageous as RF components. The ceramic filters can include a ceramic stepped impedance resonator, wherein the inner diameter of the ceramic stepped impedance resonator can vary from one end to another end. The inner diameter can be, for example, tapered, sectioned, or stair-stepped in order to provide different impedances in the ceramic resonator.

The present disclosure provides a hybrid distinct wavelength resonant band-pass filter with capacitive coupling metal pattern, including a ceramic matrix. The ceramic matrix includes a first surface and a second surface opposite to the first surface. A first resonant cavity, a second resonant cavity, a third resonant cavity, a fourth resonant cavity, a fifth resonant cavity, a sixth resonant cavity, a seventh resonant cavity, an eighth resonant cavity, and a ninth resonant cavity, sequentially distributing along a length direction of the ceramic matrix, are formed between the first surface and the second surface. A metal pattern is disposed on the first surface, the metal pattern includes a first pattern region surrounding the third resonant cavity and a second pattern region surrounding the fourth resonant cavity.

A dielectric filter with a first radio frequency (RF) passband and a second RF passband, a radio unit, an antenna unit and a base station are disclosed. According to an embodiment, the dielectric filter (1) comprises a body (2) with a plurality of resonators (201, 202, 203, 204, 205) including a first resonator (202), a second resonator (204) and a common resonator (203). The common resonator (203) is coupled under its first resonance mode to the first resonator (202) to provide the first RF passband, and is coupled under its second resonance mode to the second resonator (204) to provide the second RF passband.

Disclosed are embodiments of ceramic radiofrequency filters advantageous as RF components. The ceramic filters can include a ceramic impedance resonator, wherein the inner diameter of the ceramic stepped impedance resonator can vary from one end to another end. The inner diameter can be designed to provide different impedances in the ceramic resonator.

Disclosed are embodiments of ceramic radiofrequency filters advantageous as RF components. The ceramic filters can include a ceramic impedance resonator, wherein the inner diameter of the ceramic stepped impedance resonator can vary from one end to another end. The inner diameter can be designed to provide different impedances in the ceramic resonator.

Embodiments relate to the field of technologies of components of communications devices, and provide a dielectric filter, which resolves a problem that a solid dielectric filter has a difficulty in implementing capacitive coupling. The dielectric filter includes at least two dielectric resonators, where each of the dielectric resonators includes a body made of a solid dielectric material, and an adjusting hole located on a surface of the body. The adjusting hole is a blind hole, configured to adjust a resonance frequency of the dielectric resonator on which the blind hole is located. The bodies of all the dielectric resonators included by the dielectric filter form a body of the dielectric filter.

A multi-band RF monoblock filter including at least three RF signal filters defined in the monoblock of dielectric material by resonators defined in part by through-holes extending through the block. In one embodiment, two of the RF signal filters are in a co-linear and side-by-side relationship and the third filter is in a parallel and side-by side relationship with one of the two other RF signal filters. A pattern of conductive material defines two end and one interior RF signal input/output on the block top surface. The end RF signal input/outputs are located at opposite ends of the block and the central RF signal input/output is located between the two co-linear and side-by-side RF filters. An RF signal is transmitted through the one end RF signal input/output, the two parallel and side-by-side RF signal filters, and the central RF signal input/output and also through the other end RF signal input/output, one of the co-linear and side-by-side RF filters, and the central RF signal input/output.

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.

Apparatus comprising a first layer of electrically conductive material, a second layer of electrically conductive material, and at least one dielectric layer, which comprises a solid dielectric material, arranged between said first layer and said second layer, wherein at least one distributed resonator structure comprising a plurality of resonator posts is arranged in said at least one dielectric layer.

Multi-pole filters are provided herein. A multi-pole filter includes a substrate having a first resonator layer on a first side of the substrate and a second resonator layer that is electrically coupled to the first resonator layer and is on a second side of the substrate that is opposite the first side of the substrate.