| 摘要 |
Embodiments of the present invention 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 provided by the embodiments of the present invention includes at least two dielectric resonators, where each of the dielectric resonators includes a body made of a solid-state dielectric material, and an adjusting hole located on a surface of the body, and the bodies of all the dielectric resonators included by the dielectric filter form a body of the dielectric filter. The dielectric filter further includes: at least one negative coupling hole, where each of the negative coupling hole is located at a position of a surface of the body, at which the two dielectric resonators are connected, and the position at which the negative coupling hole is located is connected to the two dielectric resonators; and a conducting layer covering the surface of the body of the dielectric filter, a surface of the adjusting hole, and a surface of the negative coupling hole. The embodiments of the present invention are mainly used for a radio frequency front-end of a high-power wireless communications base station. |
