Abstract: Disclosed in the present invention is a nonlinear optical crystal. The chemical formula of the nonlinear optical crystal is MHgGeSe4, M being selected from Ba or Sr. The nonlinear optical crystal has no symmetrical center, belongs to an orthorhombic crystal system, and has a space group Ama2. The nonlinear optical crystal is an infrared nonlinear optical crystal, and has the advantages of great nonlinear optical effect, wide light transmitting band, high hardness, good mechanical properties, breakage resistance, deliquescence resistance, easiness in processing and preserving, etc. Also disclosed in the present invention are a method for preparing the nonlinear optical crystal and application thereof.

Abstract: Example dielectric filters, transceiver devices, and base stations are described. One example dielectric filter includes a dielectric block whose surface is covered with a metal layer, where the dielectric block includes at least two resonant cavities. The dielectric block is provided with a via hole, the via hole is located between two adjacent resonant cavities, and an inner wall of the via hole is covered with a metal layer. A first partition ring is disposed on the surface of the dielectric block and is surrounding at least one opening of the via hole, and the dielectric block is exposed in an area enclosed by an inner edge of the first partition ring and an outer edge of the first partition ring.

Abstract: Embodiments of this application provide a dual-mode resonator, a filter, and a radio frequency unit. The dual-mode resonator includes a cavity and a dual-mode dielectric body coupled to an inner surface of the cavity. The dual-mode dielectric body includes a central part and four components that protrude from the central part, where the four components are disposed opposite to each other in pair and are in a cross shape. A first coupling groove and a second coupling groove are provided on the central part, where an extension direction of the first coupling groove is between two adjacent components, and an extension direction of the second coupling groove is between the other two adjacent components. The widths and/or the depths of the first and the second coupling grooves are different, and the extension direction of the first coupling groove and the extension direction of the second coupling groove are at a preset angle.

Abstract: Example dielectric filters, transceiver devices, and base stations are described. One example dielectric filter includes a dielectric block whose surface is covered with a metal layer, where the dielectric block includes at least two resonant cavities. The dielectric block is provided with a via hole, the via hole is located between two adjacent resonant cavities, and an inner wall of the via hole is covered with a metal layer. A first partition ring is disposed on the surface of the dielectric block and is surrounding at least one opening of the via hole, and the dielectric block is exposed in an area enclosed by an inner edge of the first partition ring and an outer edge of the first partition ring.

Abstract: This application discloses a filtering apparatus, including: a coupling channel distinguishing component, dividing a coupling channel between a first filtering component and a second filtering component into a plurality of independent coupling channels, and it includes a channel distinguishing component and at least one decoupling component, the channel distinguishing component is configured to divide the coupling channel into a plurality of independent channels, and the decoupling component is configured to decouple the plurality of independent channels into the plurality of independent coupling channels; and at least one adjusting component, each of the adjusting component is configured to adjust a preset coupling scheme of a corresponding independent coupling channel, each of the at least one adjusting component is located in the corresponding independent coupling channel, and each of the adjusting component is located in a corresponding projection area.

Abstract: Example dielectric filters, transceiver devices, and base stations are described. One example dielectric filter includes a dielectric block whose surface is covered with a metal layer. The dielectric block includes at least two resonant cavities, and is provided with a via hole. The via hole is located between two adjacent resonant cavities, and an inner wall of the via hole is covered with a metal layer. A first partition ring is disposed on the surface of the dielectric block and is surrounding at least one opening of the via hole. The dielectric block is exposed in an area enclosed by an inner edge of the first partition ring and an outer edge of the first partition ring.

Abstract: This application discloses a filtering apparatus, including: a coupling channel distinguishing component, dividing a coupling channel between a first filtering component and a second filtering component into a plurality of independent coupling channels, and it includes a channel distinguishing component and at least one decoupling component, the channel distinguishing component is configured to divide the coupling channel into a plurality of independent channels, and the decoupling component is configured to decouple the plurality of independent channels into the plurality of independent coupling channels; and at least one adjusting component, each of the adjusting component is configured to adjust a preset coupling scheme of a corresponding independent coupling channel, each of the at least one adjusting component is located in the corresponding independent coupling channel, and each of the adjusting component is located in a corresponding projection area.

Abstract: Embodiments of this application provide a dual-mode resonator, a filter, and a radio frequency unit. The dual-mode resonator includes a cavity and a dual-mode dielectric body coupled to an inner surface of the cavity. The dual-mode dielectric body includes a central part and four components that protrude from the central part, where the four components are disposed opposite to each other in pair and are in a cross shape, and a. A first coupling groove and a second coupling groove are provided on the central part, where an extension direction of the first coupling groove is between two adjacent components, and an extension direction of the second coupling groove is between the other two adjacent components. The widths and/or the depths of the first and the second coupling grooves are different, and the extension direction of the first coupling groove and the extension direction of the second coupling groove are at a preset angle.

Abstract: Embodiments of this application relate to the field of filter technologies, and in particular, to a dielectric filter, a transceiver device, and a base station. The dielectric filter includes a dielectric block whose surface is covered with a metal layer, where the dielectric block includes at least two resonant cavities; the dielectric block is provided with a via hole, the via hole is located between two adjacent resonant cavities, and an inner wall of the via hole is covered with a metal layer; and a first partition ring is disposed on the surface of the dielectric block and is surrounding at least one opening of the via hole, and the dielectric block is exposed in an area enclosed by an inner edge of the first partition ring and an outer edge of the first partition ring.