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Patent
Mesaplexx | Date: 2013-12-19

The present invention provides multi-resonator cavity filters in which one or more patch elements are introduced into the coupling apertures between resonators, reducing the strength of the electric field in the aperture gap while maintaining the coupling strength from resonator to resonator. This reduced field strength reduces the sensitivity of the resonators to gap-thickness variations, and allows use of the filter in high-power applications.


A multi-mode cavity filter, including two dielectric resonator bodies, the first incorporating a piece of dielectric material having a shape to support a first resonant mode and a second substantially degenerate resonant mode; the second also including a piece of dielectric material, the dielectric properties, shape and dimensions of which may differ from those of the first dielectric resonator body; the second piece of dielectric material having a shape to support at least a first resonant mode; a layer of conductive material in contact with and covering both of the dielectric resonator bodies; one aperture in the layer appearing at the interface of the first and second dielectric resonator bodies, for transferring signals, the aperture being arranged for directly coupling signals to the first and second resonant modes in parallel, and directly coupling signals from the first and second resonant modes in parallel.


A multi-mode filter including a resonator body including a piece of dielectric material, the resonator body being configured to support a first resonant mode and a second resonant mode, the resonator body having a covering of an electrically conductive material, wherein the covering is provided with a coupling aperture arrangement, the coupling aperture arrangement including a first coupling segment and a second coupling segment, wherein the first coupling segment is configured to couple a first magnetic field or a first electric field to the first resonant mode or the second resonant mode within the resonator body and the second coupling segment is configured to couple a second magnetic field or a second electric field to the first resonant mode or the second resonant mode within the resonator body.


Patent
Mesaplexx | Date: 2014-02-21

A multi-mode cavity filter, including first and second dielectric resonator bodies, each incorporating a piece of dielectric material, a first piece shaped to support a first resonant mode and a second resonant mode that is substantially degenerate with the first mode, and the second piece shaped to support a third resonant mode and a fourth resonant mode that is substantially degenerate with the third mode, a layer of electrically conductive material in contact with and covering a surface of the first and a surface of the second dielectric resonator bodies, an aperture in the layer, wherein the aperture includes first and second portions, wherein the first portion transfers signals from the first or second resonant mode to the third or fourth resonant mode and the second portion transfers signals from the first or second resonant mode to the third or fourth resonant mode in parallel.


Patent
Mesaplexx | Date: 2012-06-04

A dielectric resonator body for a multi-mode cavity filter, the resonator including: a piece of dielectric material, with at least one substantially flat face for mounting on a substrate layer, the piece of dielectric material having a shape such that it can support at least a first resonant mode and at least one substantially degenerate resonant mode; wherein the shape of the piece of dielectric material is such that the first resonant mode and the at least one substantially degenerate resonant mode are capable of being simultaneously independently excited, and wherein the piece of dielectric material is at least partially covered with a layer of conductive material.


Patent
Mesaplexx | Date: 2014-02-21

A multi-mode cavity filter, including a first dielectric resonator body incorporating a piece of dielectric material having a shape to support a first resonant mode and a second substantially degenerate resonant mode and at least a second dielectric resonator body incorporating a piece of dielectric material having a shape to support a first resonant mode; a layer of conductive material in contact with and covering the first the dielectric resonator body and the second dielectric resonator body; a first aperture in the layer covering the first dielectric resonator body and a second aperture in the layer covering the second dielectric resonator body, one connecting path(s) arranged to couple signals via the first aperture from the first dielectric resonator body to the second dielectric resonator body via the second aperture, for the purpose of creating or influencing a location of a zero or null in a filter characteristic.


Patent
Mesaplexx | Date: 2014-02-21

A multi-mode cavity filter, including at least one dielectric resonator body incorporating a piece of dielectric material, the piece of dielectric material having a shape such that it can support at least a first resonant mode and at least a second substantially degenerate resonant mode; a layer of conductive material in contact with and covering the dielectric resonator body; and a coupling mechanism including at least one aperture in the layer of conductive material for at least one of inputting signals to the dielectric resonator body and outputting signals from the dielectric resonator body, the at least one aperture being arranged for at least one of directly coupling signals to the first resonant mode and the second substantially degenerate resonant mode in parallel, and directly coupling signals from the first resonant mode and the second substantially degenerate resonant mode in parallel.


Patent
Mesaplexx | Date: 2014-02-21

A multi-mode cavity filter, including two dielectric resonator bodies, the first incorporating a piece of dielectric material having a shape to support a first resonant mode and second substantially degenerate resonant mode; the second also including a piece of dielectric material; the piece of dielectric material having a shape to support a first resonant mode; a layer of conductive material in contact with and covering both of the dielectric resonator bodies; an aperture in the layer at the interface of the first and second dielectric resonator bodies, for transferring signals from the second dielectric resonator body to the first, transferring signals from the first dielectric resonator body to the second and/or outputting signals from the first dielectric resonator body, the aperture being arranged for coupling signals to the first and second resonant modes in parallel, and/or coupling signals from the first and second resonant modes in parallel.


Patent
Mesaplexx | Date: 2014-02-21

A multi-mode cavity filter, including at least one dielectric resonator body incorporating a piece of dielectric material having a shape to support first resonant mode and a second substantially degenerate resonant mode; excitation device(s) for at least one of: establishing an electromagnetic field external to, but immediately adjacent to, face of the dielectric resonator body or for extracting energy from an electromagnetic field located external to, but immediately adjacent to, a face of the dielectric resonator body, a layer of conductive material in contact with and covering the dielectric resonator body on the face of the dielectric resonator body: at least one aperture in the layer of conductive material for inputting signals to the dielectric resonator body and/or outputting signals from the dielectric resonator body, wherein the excitation device is located, in at least two dimensions, at an electrical centre of the face of the dielectric resonator body.


Patent
Mesaplexx | Date: 2014-02-21

A cavity filter, including first and second dielectric resonator bodies, each incorporating a piece of dielectric material, each piece of dielectric material shaped to support at least a first resonant mode, at least one excitation device for establishing an electromagnetic field within at least a first dielectric resonator body or extracting energy from an electromagnetic field located within the first dielectric resonator body, a layer of electrically conductive material in contact with and covering a surface of the first and a surface of the second dielectric resonator bodies, an aperture in the layer of electrically conductive material for inputting signals to the second dielectric resonator body and/or outputting signals from the second dielectric resonator body wherein the at least one excitation device is arranged to directly excite the first resonant mode or directly extract energy from the first resonant mode in the second dielectric resonator via the aperture.

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