MESAPLEXX PTY LTD Patent applications |
Patent application number | Title | Published |
20160006105 | Multi-Mode Cavity Filter and Excitation Device Therefor - 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. | 01-07-2016 |
20150380800 | Multi-Mode Cavity Filter - 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. | 12-31-2015 |
20150380794 | Reducing Impact on Insertion Loss of Apertures in Conductive Covering of Filter Body - 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. | 12-31-2015 |
20150180103 | FILTER - 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. | 06-25-2015 |
20140118206 | ANTENNA AND FILTER STRUCTURES - A combined filter and antenna structure comprising a multi-mode cavity filter and an antenna, wherein: the filter comprises: a dielectric body provided with a conductive covering; and an interface arranged to exchange energy between a standing wave in the body and a current conveyed external to the body; and the antenna is arranged to exchange energy between a travelling wave outside the body and a standing wave inside the body and the antenna comprises: a first window provided in the covering. | 05-01-2014 |
20140118095 | MULTI-MODE FILTER - The present invention provides a multi-mode cavity filter in which signals are coupled to or from a resonator body, using a coupling path with first and second portions arranged such that current flows in opposite directions and the couplings due to the magnetic fields generated partially cancel one another. In this way, the degree of coupling to any particular mode of the filter can be closely controlled by varying the length and/or orientation of the portions with respect to each other. | 05-01-2014 |
20140097913 | MULTI-MODE FILTER - The present invention relates to a multi-mode filter comprising a carrier on which is mounted a dielectric resonator having a covering of an electrically conductive material in which there is provided an aperture and a coupling structure for coupling input signals to the dielectric resonator or for extracting filtered output signals from the dielectric resonator. The carrier is provided with an enclosing formation of electrically conductive material, which enclosing formation is electrically coupled to the electrically conductive covering of the dielectric resonator, such that the covering and the enclosing formation together form an electrically conductive enclosure for the dielectric resonator. The enclosure formed from the covering of the dielectric resonator and the enclosing formation increases the isolation of the filter and reduces leakage. The filter of the present invention is particularly suitable for use in cascaded resonator filter arrangements, and in duplex/diplex filters. | 04-10-2014 |
20130053104 | MULTI-MODE FILTER - A multi-mode cavity filter comprises a dielectric body having at least first and second orthogonal resonant modes; a first coupling element formed on a first face of the dielectric body for coupling energy to at least a first resonant mode; and a second coupling element formed on the first face of the dielectric body for coupling energy from the at least a first resonant mode. The dielectric body is capable of supporting a first coupling path between the first coupling element and the second coupling element via the at least a first resonant mode and a second coupling path between the first coupling element and the second coupling element, the second coupling path being such that at least partial cancellation of at least some coupled energy takes place so as to form a zero in a response of the filter. | 02-28-2013 |
20130049902 | MULTI-MODE FILTER - A multi-mode cavity filter, comprising: a 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 a second substantially degenerate resonant mode; a conductive layer substantially covering the dielectric resonator body but having one or more apertures therein allowing access to the dielectric resonator body; and a coupling structure arranged in an aperture of the one or more apertures, comprising at least one coupling path for at least one of coupling an input signal to the first and second resonant modes and coupling an output signal from the first and second resonant modes, the coupling path having an open-circuit end located adjacent to an edge of the aperture for controlling a strength of electric field generated by the coupling structure. | 02-28-2013 |
20130049901 | MULTI-MODE FILTER - A multi-mode cavity filter, comprising a resonator body of dielectric material capable of supporting at least two degenerate electromagnetic standing wave modes and having a face, and a conductive pattern on at least part of the face for coupling a radio frequency signal between the pattern and the resonator body. | 02-28-2013 |
20130049896 | FILTER - A multi-mode cavity filter includes a dielectric resonator body incorporating a piece of dielectric material, the piece of dielectric material having a shape such that it can support at least two substantially degenerate resonant modes; and a phased array of coupling elements for coupling signals to the piece of dielectric material. | 02-28-2013 |
20130049895 | FILTER - A multi-mode cavity filter having a dielectric resonator body incorporating a piece of dielectric material, the piece of dielectric material having a shape such that it can support at least two substantially degenerate resonant modes; and a coupling structure comprising a plurality of independent coupling elements for coupling signals to the piece of dielectric material. | 02-28-2013 |
20130049892 | FILTER - A multi-mode cavity filter, comprising: 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 structure comprising at least one electrically conductive coupling path for at least one of inputting signals to the dielectric resonator body and outputting signals from the dielectric resonator body, the at least one electrically conductive coupling path 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. | 02-28-2013 |
20130049891 | FILTER - A multi-mode cavity filter, comprising: 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; and a coupling structure comprising a patterned conductive layer for at least one of coupling signals to the piece of dielectric material and coupling signals from the piece of dielectric material. | 02-28-2013 |