Filter

Abstract

The utility model relates to the technical field of communication, and provides a filter which comprises a cavity, a first resonant part, a second resonant part and a conductive assembly, the cavity is provided with a first resonant cavity and a second resonant cavity, and the first resonant part and the second resonant part are respectively installed in the first resonant cavity and the second resonant cavity. The distance between the first resonance part and the second resonance part is larger than or equal to two times of the diameter of the first resonance part or the second resonance part, and the conductive assembly is connected with the first resonance part and the second resonance part so that the first resonance part and the second resonance part can be coupled. Therefore, the first resonant part and the second resonant part which are far from each other can be coupled through the conductive assembly, so that the first resonant part and the second resonant part can be flexibly arranged far from each other, the cavity arrangement is more flexible, the free space of the cavity is fully utilized to accommodate the first resonant part and the second resonant part, and the space utilization rate of the cavity is improved; therefore, the insertion loss, suppression and power performance of the filter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of communication, in particular to a filter. Background Art

[0002] The filter includes a cavity and several resonators installed in the cavity. The several resonators are coupled with each other to form a signal channel, which is used to allow signals in a certain frequency band to pass with minimum loss and suppress signals in other frequency bands, thereby selecting signals in the required frequency band.

[0003] However, in existing filters, multiple resonators need to be arranged in the same continuous area of ​​the cavity, which places high demands on the internal space of the cavity and makes the arrangement position inflexible, resulting in insufficient utilization of the cavity space and limiting the insertion loss, suppression and power performance of the filter. Utility Model Content

[0004] The utility model aims to provide a filter, aiming to solve the technical problem of low cavity space utilization in existing filters.

[0005] The present application provides a filter, which includes a cavity, a first resonant component, a second resonant component and a conductive component. The cavity has a first resonant cavity and a second resonant cavity. The first resonant component and the second resonant component are respectively installed in the first resonant cavity and the second resonant cavity. The distance between the first resonant component and the second resonant component is greater than or equal to twice the diameter of the first resonant component or the second resonant component. The conductive component is respectively connected to the first resonant component and the second resonant component to couple the first resonant component and the second resonant component.

[0006] In one embodiment, the conductive component is detachably connected to the first resonant component; and / or the conductive component is detachably connected to the second resonant component.

[0007] In one embodiment, the inner bottom wall of the first resonant cavity is provided with a first mounting post and a second mounting post connected to each other, the first resonant member is mounted on the first mounting post, and the conductive component is mounted on the second mounting post.

[0008] In one embodiment, the conductive component is mounted on the second mounting post in an adjustable height manner.

[0009] In one embodiment, the conductive component includes a first tap plate, and the first tap plate is connected to the first resonator.

[0010] In one embodiment, the cavity has an opening; the filter also includes a cover plate and a first debugging rod, the cover plate covers one end of the cavity having the opening, the cover plate has a first debugging hole that passes through the cover plate along the thickness direction of the cover plate, and the first debugging rod is height-adjustably arranged in the first debugging hole to approach or move away from the first tap.

[0011] In one embodiment, the conductive component further includes a low-pass filter, and two ends of the first tap are respectively connected to the first resonant component and the low-pass filter.

[0012] In one embodiment, the conductive component further includes a second tap plate, and two ends of the second tap plate are respectively connected to the second resonant component and the low-pass filter.

[0013] In one embodiment, a partition block is provided on the inner bottom wall of the cavity, and the partition block is located between the first resonant cavity and the second resonant cavity. There is a gap between the partition block and the first resonant component and the second resonant component respectively, and the conductive component passes through the partition block and extends into the first resonant cavity and the second resonant cavity respectively.

[0014] In one embodiment, the cavity has a third resonant cavity, the third resonant cavity is adjacent to and connected to the first resonant cavity, a third resonant component is installed in the third resonant cavity, and the third resonant component is connected to the first resonant component through a first coupling rib;

[0015] And / or, the cavity has a fourth resonant cavity, the fourth resonant cavity is adjacent to and connected to the second resonant cavity, a fourth resonant component is installed in the fourth resonant cavity, and the fourth resonant component is connected to the second resonant component via a second coupling rib.

[0016] The filter provided by the utility model has the following beneficial effects: the first resonant component is installed in the first resonant cavity of the cavity, the second resonant component is installed in the second resonant cavity of the cavity, the distance between the first resonant component and the second resonant component is greater than or equal to twice the diameter of the first resonant component or the second resonant component, the first resonant component and the second resonant component are coupled through a conductive component, that is, the first resonant component and the second resonant component can be arranged at a long distance, and correspondingly, the first resonant cavity and the second resonant cavity can be flexibly arranged at a long distance, the first resonant cavity and the second resonant cavity may not occupy the same continuous area of ​​the cavity, or the first resonant cavity and / or the second resonant cavity may be arranged at the corners in the cavity, making full use of the free space in the cavity to accommodate the first resonant component and the second resonant component, thereby improving the space utilization rate of the cavity, solving the technical problem of low cavity space utilization rate in existing filters, and thus improving the insertion loss, suppression and power performance of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of a filter provided in an embodiment of the utility model;

[0019] Figure 2 An exploded perspective view of a filter provided by an embodiment of the utility model;

[0020] Figure 3 A perspective view of a cavity of a filter provided by an embodiment of the utility model;

[0021] Figure 4 An exploded schematic diagram of a filter provided by an embodiment of the utility model;

[0022] Figure 5 Another exploded schematic diagram of the filter provided by the embodiment of the utility model;

[0023] Figure 6 This is a simulation waveform diagram of the filter provided in the embodiment of the utility model.

[0024] Among them, the reference numerals in the figure are:

[0025] 100, cavity; 101, coupling channel; 102, opening; 103, partition block; 110, first resonant cavity; 111, first mounting post; 112, second mounting post; 120, second resonant cavity; 121, third mounting post; 122, fourth mounting post; 130, third resonant cavity; 140, fourth resonant cavity; 150, first coupling rib; 160, second coupling rib; 170, third coupling rib; 180, fourth coupling rib;

[0026] 210, first resonant component; 220, second resonant component; 230, third resonant component; 240, fourth resonant component; 250, input terminal; 260, output terminal;

[0027] 300, conductive component; 310, first tap piece; 320, low pass; 330, second tap piece;

[0028] 410, cover plate; 411, first debugging hole; 412, second debugging hole; 420, first debugging rod; 430, second debugging rod. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0031] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] See also Figure 1 and Figure 2This embodiment provides a filter. The filter includes a cavity 100, a first resonant component 210, a second resonant component 220 and a conductive component 300. The cavity 100 has a first resonant cavity 110 and a second resonant cavity 120. The first resonant component 210 and the second resonant component 220 are installed in the first resonant cavity 110 and the second resonant cavity 120 respectively. Figure 2 , the distance a between the first resonator 210 and the second resonator 220 is greater than or equal to twice the diameter b of the first resonator 210, or, the distance a between the first resonator 210 and the second resonator 220 is greater than or equal to twice the diameter c of the second resonator 220, that is, a≥2b, or, a≥2c. Wherein, the distance a between the first resonator 210 and the second resonator 220 refers to the distance between the central axis of the first resonator 210 and the central axis of the second resonator 220. The diameter of the resonator refers to the diameter of the circumscribed circle of the projection of the resonator on its central axis. The conductive component 300 is connected to the first resonator 210 and the second resonator 220 respectively, so that the first resonator 210 and the second resonator 220 are coupled, so as to realize the signal energy transmission between the first resonator 210 and the second resonator 220 at a relatively long distance.

[0035] In the filter provided in this embodiment, the first resonant element 210 and the second resonant element 220 are coupled through the conductive component 300, that is, the first resonant element 210 and the second resonant element 220 can be arranged at a long distance, and correspondingly, the first resonant cavity 110 and the second resonant cavity 120 can be flexibly arranged at a long distance, and the first resonant cavity 110 and the second resonant cavity 120 do not occupy the same continuous area of ​​the cavity 100. For example, the first resonant cavity 110 and / or the second resonant cavity 120 are arranged at the corner positions in the cavity 100, and the free space of the cavity 100 is fully utilized to accommodate the first resonant element 210 and the second resonant element 220. The cavity 100 is more flexible in arrangement, which improves the space utilization of the cavity 100 and improves the insertion loss, suppression and power performance of the filter.

[0036] Combination Figure 6 , the conductive component 300 is used to enable the first resonant element 210 and the second resonant element 220 to be arranged at a long distance, ensuring that the filter has good suppression performance. Among them, the reflection coefficient S11 of the input port and the reflection coefficient S22 of the output port have large attenuation for the selected frequency band (920MHz~960MHz) signal, so that the filter has better port matching and less signal reflection; the transmission coefficient S21 has almost no attenuation for the selected frequency band (920MHz~960MHz) signal, so that the filter has good transmission characteristics and high gain.

[0037] In addition, when the coupling channel 101 between the first resonant cavity 110 and the second resonant cavity 120 in the cavity 100 is narrow, the coupling area of ​​the coupling channel 101 is limited, and there is no extra space to install components such as coupling ribs or coupling rods. Compared with the coupling ribs or coupling windows, the conductive component 300 is more conducive to enhancing the coupling amount between the first resonant element 210 and the second resonant element 220, ensuring the effective coupling of the first resonant element 210 and the second resonant element 220, so that the cavity 100 does not need to arrange the first resonant element 210 and the second resonant element 220 in a continuous large area space. The cavity 100 can accommodate other components or set structures such as isolation walls between the first resonant element 210 and the second resonant element 220, which is conducive to improving the utilization rate of the internal space of the cavity 100.

[0038] In some embodiments, in combination Figure 3 and Figure 4 The cavity 100 has a third resonant cavity 130, which is adjacent to and connected to the first resonant cavity 110. A third resonant member 230 is installed in the third resonant cavity 130, and the third resonant member 230 is connected to the first resonant member 210 via a first coupling rib 150. The first resonant cavity 110 and the third resonant cavity 130 are arranged adjacent to each other, so that the first resonant member 210 and the third resonant member 230 are arranged compactly, thereby improving the utilization rate of the internal space of the cavity 100.

[0039] In some embodiments, in combination Figure 3 and Figure 4 The cavity 100 has a fourth resonant cavity 140, which is adjacent to and connected to the second resonant cavity 120. A fourth resonant member 240 is installed in the fourth resonant cavity 140, and the fourth resonant member 240 is connected to the second resonant member 220 via a second coupling rib 160. The second resonant cavity 120 and the fourth resonant cavity 140 are arranged adjacent to each other, so that the second resonant member 220 and the fourth resonant member 240 are arranged compactly, thereby improving the utilization rate of the internal space of the cavity 100.

[0040] In one embodiment, the third resonant element 230, the first resonant element 210, the second resonant element 220 and the fourth resonant element 240 are coupled in sequence to form a main signal channel for signal transmission and filtering. The signal passes through the third resonant element 230, the first resonant element 210, the second resonant element 220 and the fourth resonant element 240 in sequence along the main signal channel, or passes through the fourth resonant element 240, the second resonant element 220, the first resonant element 210 and the third resonant element 230 in sequence along the main signal channel. Specifically, the third resonant element 230 receives an external signal through the input terminal 250, and the fourth resonant element 240 transmits a signal to the outside through the output terminal 260. It can be understood that in other embodiments, the cavity 100 may not be provided with the third resonant cavity 130, and the first resonant element 210 is directly connected to the input terminal 250 or the output terminal 260; the cavity 100 may not be provided with the fourth resonant cavity 140, and the second resonant element 220 is directly connected to the input terminal 250 or the output terminal 260.

[0041] In this embodiment, the resonant components including the first resonant component 210, the second resonant component 220, the third resonant component 230, and the fourth resonant component 240 can be metal resonant components, ceramic dielectric resonant components, or dielectric resonant components of other materials. The resonant component can be a hollow resonant component or a solid resonant component. The resonant component can have a resonant disk or not. The resonant disk can have a flange or not. When the resonant component has a resonant disk, the diameter of the resonant component is the outer diameter of the resonant disk. The resonant component can be a circular component, a polygonal component, a special-shaped component, a sheet resonant component, a sheet metal resonant component, or other resonant components, etc.

[0042] In some embodiments, in combination Figure 2 , the distance a between the first resonant member 210 and the second resonant member 220 is greater than or equal to three times the diameter b of the first resonant member 210, or, the distance a between the first resonant member 210 and the second resonant member 220 is greater than or equal to three times the diameter c of the second resonant member 220, that is, a ≥ 3b, or, a ≥ 3c. Correspondingly, the distance between the first resonant cavity 110 and the second resonant cavity 120 can be set farther, the cavity arrangement of the cavity 100 is more flexible, and the cross-resonance phenomenon caused by the dense arrangement of multiple resonant cavities is avoided, so that the first resonant cavity 110 and the second resonant cavity 120 can be arranged along the edge of the cavity 100 or along the diagonal of the cavity 100, making full use of the edge space or diagonal space of the cavity 100.

[0043] In some embodiments, in combination Figure 2, the distance a between the first resonator 210 and the second resonator 220 is less than or equal to ten times the diameter b of the first resonator 210, or, the distance a between the first resonator 210 and the second resonator 220 is less than or equal to ten times the diameter c of the second resonator 220, that is, a≤10b, or, a≤10c. Such a design avoids the distance between the first resonator 210 and the second resonator 220 being too far, which, on the one hand, facilitates the relatively compact arrangement of the first resonator 210 and the second resonator 220, thereby improving the integration of the filter; on the other hand, it avoids the distance between the first resonant cavity 110 and the second resonant cavity 120 being too far, thereby optimizing the cavity arrangement design, and at the same time, avoids the length of the conductive component 300 being too long, thereby reducing the occupation of the conductive component 300 in the internal space of the cavity 100, thereby reducing the volume and weight of the conductive component 300, and facilitating the lightweight and miniaturized design of the filter.

[0044] In some embodiments, in combination Figure 2 and Figure 3 , the width d of the coupling channel 101 between the first resonant cavity 110 and the second resonant cavity 120 is less than or equal to one third of the diameter b of the first resonant element 210, or the width d of the coupling channel 101 between the first resonant cavity 110 and the second resonant cavity 120 is less than or equal to one third of the diameter c of the second resonant element 220, that is, or Such a design is conducive to narrowing the coupling channel 101. Under the premise of ensuring the passage of the conductive component 300, the occupation of the internal space of the cavity 100 by the coupling channel 101 is reduced, which is conducive to the cavity 100 accommodating other components or setting up structures such as isolation walls beside the coupling channel 101, thereby improving the utilization rate of the internal space of the cavity 100.

[0045] In some embodiments, in combination Figure 2 and Figure 3 , the width d of the coupling channel 101 between the first resonant cavity 110 and the second resonant cavity 120 is greater than or equal to one twentieth of the diameter b of the first resonant element 210, or the width d of the coupling channel 101 between the first resonant cavity 110 and the second resonant cavity 120 is greater than or equal to one twentieth of the diameter c of the second resonant element 220, that is, or Such a design can ensure that the coupling channel 101 has a certain width d for the conductive component 300 to pass through, while ensuring the installation and debugging operation space of the conductive component 300, simplifying the assembly and debugging of the filter.

[0046] In this embodiment, the conductive component 300 may be connected to the first resonant member 210 at its end, or may be connected to the first resonant member 210 at its middle in the length direction, which is not limited here. The conductive component 300 may be connected to the second resonant member 220 at its end, or may be connected to the second resonant member 220 at its middle in the length direction, which is not limited here. In one embodiment, one end of the conductive component 300 is connected to the first resonant member 210, and the other end of the conductive component 300 is connected to the second resonant member 220, which is conducive to shortening the length of the conductive component 300, reducing the occupation of the conductive component 300 in the internal space of the cavity 100, and reducing the difficulty of assembling and debugging the conductive component 300 in the cavity 100.

[0047] In this embodiment, the conductive component 300 can be directly connected to the first resonant component 210, for example, connected to the rod portion or the resonant disk of the first resonant component 210, or indirectly connected to the first resonant component 210, which is not limited here. The conductive component 300 can be directly connected to the second resonant component 220, or indirectly connected to the second resonant component 220, which is not limited here.

[0048] In some embodiments, in combination Figure 2 and Figure 3 , the inner bottom wall of the first resonant cavity 110 is provided with a first mounting post 111 and a second mounting post 112 connected to each other, the first resonant member 210 is mounted on the first mounting post 111, and the conductive component 300 is mounted on the second mounting post 112. Based on this, on the first hand, compared with the first resonant member 210 being directly mounted on the inner bottom wall of the first resonant cavity 110, the first mounting post 111 can reduce the contact area between the bottom surface of the first resonant member 210 and the inner bottom wall of the first resonant cavity 110, making the contact more uniform and reducing the interference to the signal; it also raises the height of the first resonant member 210 in the first resonant cavity 110, thereby optimizing the resonant frequency generated by the first resonant member 210, so that the filter has better performance indicators; on the second hand, compared with the conductive component 300 being directly connected to the first resonant member 210, the conductive component 300 is mounted on the second mounting post 112 located in the first resonant cavity 110. The column 112 avoids the need to provide a connection structure such as a connection hole on the first resonant member 210, and the second mounting column 112 can stably support the conductive component 300, so that the first resonant member 210, the conductive component 300 and the cavity 100 form a whole, and the overall mechanical stability is higher, which is conducive to stable signal transmission; thirdly, the setting of the first mounting column 111 and the second mounting column 112 is conducive to the installation and positioning of the first resonant member 210 and the conductive component 300, improves the assembly accuracy, and at the same time allows a gap between the first resonant member 210 and the conductive component 300 to avoid interference between the two, thereby providing an operating space for the installation and debugging of the two.

[0049] In one embodiment, in combination Figure 2 and Figure 3 The conductive component 300 is installed on the second installation column 112 in an adjustable height, so that the installation height of the conductive component 300 is adjustable, thereby adjusting the coupling amount between the first resonant component 210 and the second resonant component 220. For example, when the first resonant component 210 and the second resonant component 220 are far apart, the coupling amount between the first resonant component 210 and the second resonant component 220 is increased by raising the installation height of the conductive component 300 to meet the performance index of the filter. For another example, when the bandwidth required by the filter is large, the coupling amount between the first resonant component 210 and the second resonant component 220 needs to be small, then the installation height of the conductive component 300 is lowered to match the bandwidth requirement of the filter.

[0050] Specifically, the conductive component 300 can be directly connected to different height positions of the second mounting column 112 to achieve adjustable installation height of the conductive component 300; or, the conductive component 300 is fixedly connected to a fastener, and the fastener is installed on the second mounting column 112 with adjustable height, for example, the fastener is threadedly installed on the second mounting column 112 to achieve adjustable installation height of the conductive component 300; or, the fastener is inserted into the conductive component 300 and the second mounting column 112, and the installation height of the conductive component 300 is adjusted by arranging gaskets of different thicknesses and / or different numbers between the conductive component 300 and the second mounting column 112. It can be understood that the conductive component 300 can also be installed on the second mounting column 112 with adjustable height in other ways, which will not be described one by one here.

[0051] In one embodiment, the first mounting column 111 and the second mounting column 112 are connected by the third coupling rib 170, so that the second mounting column 112 can be flexibly arranged in the first resonant cavity 110, and the space of the first resonant cavity 110 is fully utilized to assemble the conductive component 300, and then connected to the first mounting column 111 through the third coupling rib 170, so as to ensure the stable signal energy transmission between the conductive component 300 and the first resonant element 210.

[0052] In one embodiment, the second mounting post 112 is located on a side of the first mounting post 111 close to the second resonant cavity 120 , thereby facilitating shortening the length of the conductive component 300 and facilitating the end of the conductive component 300 away from the second mounting post 112 to extend to the second resonant cavity 120 without obstruction.

[0053] In one embodiment, the first mounting column 111 and the cavity 100 are integrally formed, and / or the second mounting column 112 and the cavity 100 are integrally formed, so that no assembly is required between the first mounting column 111 and the cavity 100, and between the second mounting column 112 and the cavity 100, and the positioning accuracy is high, which can ensure the dimensional stability and assembly consistency of the product, greatly reduce assembly errors, improve assembly consistency, and thereby improve the stability of product indicators.

[0054] Specifically, according to the simulation results of the filter, the height of the second mounting post 112 is flexibly designed to match the mounting height of the conductive component 300, thereby achieving effective coupling between the first resonant element 210 and the second resonant element 220 to meet the performance indicators required by the filter.

[0055] It can be understood that in other embodiments, the second mounting post 112 and the cavity 100 are manufactured separately and then connected separately. For example, the second mounting post 112 is fixedly connected to the inner bottom wall of the first resonant cavity 110 by bonding, welding, threaded connection, fastener connection, snap connection, crimping, plugging, sleeve connection, interference fit, etc., thereby reducing the difficulty of integral molding of the cavity 100 and the second mounting post 112. At the same time, according to the different coupling requirements between the first resonant element 210 and the second resonant element 220, the second mounting post 112 of different heights is selected to meet the performance indicators of the filter. Specifically, the second mounting post 112 is detachably installed on the inner bottom wall of the first resonant cavity 110. For example, the second mounting post 112 is fixedly connected to the inner bottom wall of the first resonant cavity 110 by detachable methods such as threaded connection, fastener connection, snap connection, crimping, plugging, sleeve connection, interference fit, etc., which facilitates the disassembly and replacement of the second mounting post 112, making the installation height adjustment of the conductive component 300 more flexible.

[0056] In some embodiments, in combination Figure 2 and Figure 3 , the inner bottom wall of the second resonant cavity 120 is provided with a third mounting post 121 and a fourth mounting post 122 connected to each other, the second resonant member 220 is mounted on the third mounting post 121, and the conductive component 300 is mounted on the fourth mounting post 122. Based on this, on the first hand, compared with the second resonant member 220 being directly mounted on the inner bottom wall of the second resonant cavity 120, the third mounting post 121 can reduce the contact area between the bottom surface of the second resonant member 220 and the inner bottom wall of the second resonant cavity 120, making the contact more uniform and reducing the interference to the signal; it also raises the second resonant member 220, thereby optimizing the resonant frequency generated by the second resonant member 220, so that the filter has better performance indicators; on the second hand, compared with the conductive component 300 being directly connected to the second resonant member 220, the conductive component 300 is mounted on the fourth mounting post 122, avoiding the second resonant member 220 from being directly mounted on the second resonant member 220. The vibrator 220 is provided with connection structures such as connection holes, and the fourth mounting column 122 can stably support the conductive component 300, so that the second resonant component 220, the conductive component 300 and the cavity 100 form a whole, and the overall mechanical stability is higher, which is conducive to stable signal transmission; thirdly, the setting of the third mounting column 121 and the fourth mounting column 122 is conducive to the installation and positioning of the second resonant component 220 and the conductive component 300, improves the assembly accuracy, and at the same time allows a gap between the second resonant component 220 and the conductive component 300 to avoid interference between the two, thereby providing an operating space for the installation and debugging of the two.

[0057] In one embodiment, in combination Figure 2 and Figure 3 The conductive component 300 is installed on the fourth installation column 122 in an adjustable height, so that the installation height of the conductive component 300 is adjustable, thereby adjusting the coupling amount between the first resonant component 210 and the second resonant component 220 .

[0058] In one embodiment, the third mounting column 121 and the fourth mounting column 122 are connected by a fourth coupling rib 180, so that the fourth mounting column 122 can be flexibly arranged in the second resonant cavity 120, and the space of the second resonant cavity 120 is fully utilized to assemble the conductive component 300, and then connected to the third mounting column 121 through the fourth coupling rib 180, so as to ensure the stable signal energy transmission between the conductive component 300 and the second resonant element 220.

[0059] In one embodiment, the fourth mounting post 122 is located on a side of the third mounting post 121 close to the first resonant cavity 110 , thereby facilitating shortening the length of the conductive component 300 and facilitating the end of the conductive component 300 away from the fourth mounting post 122 to extend to the first resonant cavity 110 without obstruction.

[0060] In one embodiment, the third mounting column 121 and the cavity 100 are integrally formed, and / or the fourth mounting column 122 and the cavity 100 are integrally formed, which can ensure the dimensional stability and assembly consistency of the product, greatly reduce assembly errors, improve assembly consistency, and thereby improve product indicator stability.

[0061] Specifically, according to the simulation results of the filter, the height of the fourth mounting post 122 is flexibly designed to match the mounting height of the conductive component 300, thereby achieving effective coupling between the first resonant element 210 and the second resonant element 220 to meet the performance indicators of the filter.

[0062] It can be understood that in other embodiments, the fourth mounting post 122 and the cavity 100 are manufactured separately and then connected separately. For example, the fourth mounting post 122 is fixedly connected to the inner bottom wall of the second resonant cavity 120 by bonding, welding, threaded connection, fastener connection, snap connection, crimping, plugging, sleeve connection, interference fit, etc., thereby reducing the difficulty of integral molding of the cavity 100 and the fourth mounting post 122. At the same time, according to the different coupling requirements between the first resonant element 210 and the second resonant element 220, the fourth mounting post 122 of different heights is selected to meet the performance indicators of the filter. Specifically, the fourth mounting post 122 is detachably installed on the inner bottom wall of the second resonant cavity 120. For example, the fourth mounting post 122 is fixedly connected to the inner bottom wall of the second resonant cavity 120 by detachable methods such as threaded connection, fastener connection, snap connection, crimping, plugging, sleeve connection, interference fit, etc., which facilitates the removal and replacement of the fourth mounting post 122, making the installation height adjustment of the conductive component 300 more flexible.

[0063] In this embodiment, the conductive component 300 may include a tap sheet, a tap line, a connecting sheet, a connecting rod, a coupling sheet, a low-pass 320, a cable, and other structures with signal transmission functions, and the low-pass 320 may also enhance suppression for signal processing. In this embodiment, the shape of the conductive component 300 may be a straight line, a bent shape, a strip line shape, an arc shape, an irregular shape, etc., and the present application does not limit the specific shape of the conductive component 300.

[0064] In some embodiments, the conductive component 300 includes a cable, and both ends of the cable are respectively connected to the first resonant element 210 and the second resonant element 220. The flexible cable is convenient for arrangement in a narrow and tortuous coupling channel 101, thereby reducing the requirements for the shape, size and position of the coupling channel 101, and facilitating the flexible arrangement of the first resonant cavity 110 and the second resonant cavity 120 located at both ends of the coupling channel 101.

[0065] In some embodiments, in combination Figure 2 and Figure 3 The conductive component 300 includes a first tap sheet 310, and the first tap sheet 310 is connected to the first resonant component 210. The sheet-shaped first tap sheet 310 has a large surface area, which is conducive to stable connection with the first resonant component 210, and is conducive to the lightweight design of the conductive component 300. At the same time, it is convenient to pass through a narrow coupling channel 101, and it is also convenient to flexibly adapt to coupling channels 101 of different shapes through bending. In addition, by selecting first tap sheets 310 of different thicknesses and different widths, the coupling amount between the first resonant component 210 and the second resonant component 220 can be flexibly adjusted, which is conducive to achieving effective coupling between the first resonant component 210 and the second resonant component 220 at a long distance.

[0066] In some embodiments, in combination Figure 1 , Figure 2 and Figure 4 The cavity 100 has an opening 102. The filter further includes a cover plate 410, which covers one end of the cavity 100 having the opening 102 to form a closed cavity, achieve a shielding function, and ensure that the signal in the cavity 100 will not leak.

[0067] In one embodiment, in combination Figure 1 and Figure 2The filter further includes a first debugging rod 420, and the cover plate 410 has a first debugging hole 411 that penetrates the cover plate 410 along the thickness direction of the cover plate 410. The first debugging rod 420 is height-adjustably arranged in the first debugging hole 411 to be close to or away from the first tap piece 310. When the first debugging rod 420 is close to the first tap piece 310, the coupling amount of the first tap piece 310 is increased. When the first debugging rod 420 is away from the first tap piece 310, the coupling amount of the first tap piece 310 is reduced. The staff can adjust the coupling amount of the first tap piece 310 by adjusting the height of the first debugging rod 420, and then adjust the coupling amount of the first resonator 210 and the second resonator 220, so as to achieve effective coupling between the first resonator 210 and the second resonator 220 at a long distance.

[0068] Specifically, the cover plate 410 is fixedly provided with a first debugging nut at the end of the first debugging hole 411 away from the cavity 100. For example, the first debugging nut is welded to the top surface of the cover plate 410 and is located directly above the first debugging hole 411. The first debugging nut is threadedly engaged with the first debugging rod 420. By rotating the first debugging rod 420, the first debugging rod 420 is moved closer to or away from the first tap piece 310. The first debugging rod 420 may be threadedly engaged with the first debugging hole 411. In this case, the first debugging hole 411 has an internal thread. The first debugging rod 420 may also not be threadedly engaged with the first debugging hole 411. In this case, the hole wall of the first debugging hole 411 is smooth, and the aperture of the first debugging hole 411 is larger than the outer diameter of the first debugging rod 420.

[0069] It is understood that in other embodiments, the first debugging hole 411 is a threaded hole, and the first debugging rod 420 is directly threadedly connected to the first debugging hole 411, without the need to additionally provide a first debugging nut. Alternatively, the first debugging rod 420 is height-adjustably connected to the first debugging hole 411, so that the first debugging rod 420 can be close to or away from the first tap 310, which is not a sole limitation.

[0070] Specifically, along the projection in the thickness direction of the cover plate 410, the first debugging rod 420 and the first tap piece 310 at least partially overlap, thereby enhancing the coupling strength between the first debugging rod 420 and the first tap piece 310 and improving the coupling sensitivity. Therefore, when the cross-section of the first debugging rod 420 is small or the width of the first tap piece 310 is small, the first debugging rod 420 and the first tap piece 310 can still be effectively coupled, which is beneficial to the lightweight design of the filter.

[0071] Specifically, in the projection in the thickness direction of the cover plate 410, the first debugging rod 420 and the first tap piece 310 are staggered, and the interval between the projection of the first debugging rod 420 and the projection of the first tap piece 310 is less than or equal to 5 cm. Therefore, on the one hand, the lower end of the first debugging rod 420 can be adjusted to the bottom of the first tap piece 310 without obstruction, which increases the movement range of the first debugging rod 420, thereby expanding the coupling adjustment range of the first debugging rod 420 to meet the requirements of different coupling amounts of the first resonant element 210 and the second resonant element 220. On the other hand, the first debugging rod 420 and the first tap piece 310 are arranged adjacent to each other, and the two have good coupling strength, which is still conducive to the miniaturization design of the first debugging rod 420 and the first tap piece 310, and thus is conducive to the lightweight design of the filter.

[0072] In one embodiment, in combination Figure 2 , Figure 4 and Figure 5 , the conductive component 300 further includes a low-pass filter 320, and the two ends of the first tap 310 are respectively connected to the first resonant component 210 and the low-pass filter 320. The low-pass filter 320 can not only ensure stable signal transmission, but also filter out high-frequency noise and interference signals for signal processing. At this time, the low-pass filter 320 is arranged at a long distance between the first resonant component 210 and the second resonant component 220, without occupying additional space near the input terminal 250 in the cavity 100, which is conducive to improving the space utilization rate of the cavity 100.

[0073] Specifically, the two ends of the first tap piece 310 are detachably connected to the first resonator 210 and the low-pass filter 320, respectively, so that the first tap pieces 310 of different thicknesses and widths can be easily disassembled and replaced according to different coupling requirements to meet the performance indicators of the filter.

[0074] In one embodiment, one end of the first tap piece 310 is mounted on the second mounting post 112, and the other end of the first tap piece 310 is connected to the low-pass filter 320. The first tap piece 310 can be stably supported on the second mounting post 112, avoiding direct connection to the first resonator 210, which results in the need for a connection structure to be provided on the first resonator 210.

[0075] In one embodiment, in combination Figure 2 and Figure 4 The conductive component 300 further includes a second tap piece 330, and the two ends of the second tap piece 330 are respectively connected to the second resonant component 220 and the low-pass filter 320. Compared with the low-pass filter 320, the second tap piece 330 is easier to bend to extend into the second resonant cavity 120, or to adapt to the connection height with the second resonant component 220, so as to facilitate the connection operation with the second resonant component 220. At the same time, the second tap piece 330 can adjust the coupling amount, thereby expanding the coupling adjustment range of the conductive component 300.

[0076] Specifically, the two ends of the second tap piece 330 are detachably connected to the second resonator 220 and the low-pass filter 320, respectively, so that the second tap pieces 330 of different thicknesses and widths can be easily disassembled and replaced according to different coupling requirements to meet the performance indicators of the filter.

[0077] In one embodiment, in combination Figure 2 One end of the second tap piece 330 is mounted on the fourth mounting post 122, and the other end of the second tap piece 330 is connected to the low-pass filter 320. The second tap piece 330 can be stably supported on the fourth mounting post 122, avoiding direct connection to the second resonator 220, which results in the need for a connection structure to be provided on the second resonator 220.

[0078] In one embodiment, in combination Figure 1 and Figure 2 The filter further includes a second debugging rod 430, and the cover plate 410 has a second debugging hole 412 that penetrates the cover plate 410 along the thickness direction of the cover plate 410. The second debugging rod 430 is height-adjustably arranged in the second debugging hole 412 to be close to or away from the second tap piece 330. When the second debugging rod 430 is close to the second tap piece 330, the coupling amount of the second tap piece 330 is increased. When the second debugging rod 430 is away from the second tap piece 330, the coupling amount of the second tap piece 330 is reduced. The staff can adjust the coupling amount of the second tap piece 330 by adjusting the height of the second debugging rod 430, and then adjust the coupling amount of the first resonator 210 and the second resonator 220, so as to achieve effective coupling between the first resonator 210 and the second resonator 220 at a long distance.

[0079] Specifically, along the projection in the thickness direction of the cover plate 410, the second debugging rod 430 and the second tap piece 330 at least partially overlap, thereby enhancing the coupling strength between the second debugging rod 430 and the second tap piece 330 and improving the coupling sensitivity. Therefore, when the cross-section of the second debugging rod 430 is small or the width of the second tap piece 330 is small, the second debugging rod 430 and the second tap piece 330 can still be effectively coupled, which is beneficial to the lightweight design of the filter.

[0080] Specifically, in the projection in the thickness direction of the cover plate 410, the second debugging rod 430 and the second tap piece 330 are staggered, and the interval between the projection of the second debugging rod 430 and the projection of the second tap piece 330 is less than or equal to 5 cm. Therefore, on the one hand, the lower end of the second debugging rod 430 can be adjusted to the bottom of the second tap piece 330 without obstruction, thereby increasing the movement range of the second debugging rod 430, thereby expanding the coupling adjustment range of the second debugging rod 430, and meeting the requirements of different coupling amounts of the first resonant component 210 and the second resonant component 220. On the other hand, the second debugging rod 430 and the second tap piece 330 are arranged adjacent to each other, and the two have good coupling strength, which is still conducive to the miniaturization design of the second debugging rod 430 and the second tap piece 330, and thus is conducive to the lightweight design of the filter.

[0081] In one embodiment, in combination Figure 2 , Figure 3 and Figure 5 The inner bottom wall of the cavity 100 is provided with a partition block 103, which is located between the first resonant cavity 110 and the second resonant cavity 120. There is a gap between the partition block 103 and the first resonant member 210 and the second resonant member 220 respectively. The conductive component 300 passes through the partition block 103 and extends into the first resonant cavity 110 and the second resonant cavity 120 respectively, so as to ensure the effective coupling of the first resonant member 210 and the second resonant member 220 located at both ends of the partition block 103. The provision of the partition block 103 can, on the one hand, improve the structural strength of the cavity 100 at the narrow and long coupling channel 101, which is conducive to improving the overall strength of the filter, and can stably support the conductive component 300 passing through the partition block 103. On the other hand, it can isolate the signal interference between the first resonant cavity 110 and the second resonant cavity 120, avoid the coupling of the second resonant member 220 with electrical components other than the first resonant member 210, and improve the stability of signal transmission.

[0082] Specifically, the conductive component 300 passes through the top of the partition block 103, thereby raising the installation height of the conductive component 300, which is beneficial to increase the coupling amount between the first resonant element 210 and the second resonant element 220, and meet the long-distance coupling requirements of the two.

[0083] Specifically, the conductive component 300 is supported on the top of the separation block 103 to prevent the conductive component 300 from being suspended too long.

[0084] In some embodiments, in combination Figure 2 The conductive component 300 can be connected to the first resonant element 210 by plugging, welding, interference fit, bonding, snap-on, crimping, threaded connection or fastener connection. It only needs to be possible for the conductive component 300 and the first resonant element 210 to achieve radio frequency signal transmission, and there is no specific limitation on the installation method.

[0085] Optionally, the conductive component 300 is fixed to the first resonant component 210 by welding, which not only realizes a tight connection between the two, but also realizes electrical connectivity, ensures good electrical conductivity, and reduces energy loss.

[0086] In one embodiment, in combination Figure 2 The conductive component 300 is detachably connected to the first resonant component 210. For example, the conductive component 300 is fixedly connected to the first resonant component 210 by a detachable method such as threaded connection, fastener connection, snap connection, crimping, plug-in connection, sleeve connection, interference fit, etc., which facilitates the disassembly and replacement of the conductive component 300 and makes the installation height adjustment of the conductive component 300 more flexible.

[0087] Specifically, the first tap sheet 310 is detachably connected to the second mounting column 112 and the low-pass filter 320, respectively, so as to facilitate the replacement of the first tap sheet 310. By replacing the first tap sheet 310 with different thicknesses and widths, or adjusting the installation height of the first tap sheet 310 on the second mounting column 112, or adjusting the setting height of the second mounting column 112, the staff can flexibly adjust the coupling amount between the first resonant component 210 and the second resonant component 220, so as to achieve effective coupling between the first resonant component 210 and the second resonant component 220 at a long distance.

[0088] In some embodiments, in combination Figure 2 The conductive component 300 can be connected to the second resonant element 220 by plugging, welding, interference fit, bonding, snap-on, crimping, threaded connection or fastener connection. It only needs to be possible for the conductive component 300 and the second resonant element 220 to achieve radio frequency signal transmission, and there is no specific limitation on the installation method.

[0089] Optionally, the conductive component 300 and the second resonant component 220 are fixed by welding, which not only realizes a tight connection between the two, but also realizes electrical connectivity, ensures good electrical conductivity, and reduces energy loss.

[0090] In one embodiment, in combination Figure 2 The conductive component 300 is detachably connected to the second resonant component 220. For example, the conductive component 300 is fixedly connected to the second resonant component 220 by a detachable method such as threaded connection, fastener connection, snap connection, crimping, plug-in connection, sleeve connection, interference fit, etc., which facilitates the disassembly and replacement of the conductive component 300 and makes the installation height adjustment of the conductive component 300 more flexible.

[0091] Specifically, the second tap piece 330 is detachably connected to the fourth mounting column 122 and the low-pass filter 320, respectively, so as to facilitate the replacement of the second tap piece 330. By replacing the second tap piece 330 with different thicknesses and widths, or adjusting the installation height of the second tap piece 330 on the fourth mounting column 122, or adjusting the setting height of the fourth mounting column 122, the staff can flexibly adjust the coupling amount between the first resonant component 210 and the second resonant component 220, so as to achieve effective coupling between the first resonant component 210 and the second resonant component 220 at a long distance.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A filter, characterized in that: The filter includes a cavity, a first resonant component, a second resonant component and a conductive component. The cavity has a first resonant cavity and a second resonant cavity. The first resonant component and the second resonant component are respectively installed in the first resonant cavity and the second resonant cavity. The distance between the first resonant component and the second resonant component is greater than or equal to twice the diameter of the first resonant component or the second resonant component. The conductive component is respectively connected to the first resonant component and the second resonant component to couple the first resonant component and the second resonant component.

2. The filter according to claim 1, wherein: The conductive component is detachably connected to the first resonant component; and / or the conductive component is detachably connected to the second resonant component.

3. The filter according to claim 1, wherein: The inner bottom wall of the first resonant cavity is provided with a first mounting post and a second mounting post connected to each other. The first resonant component is mounted on the first mounting post, and the conductive component is mounted on the second mounting post.

4. The filter according to claim 3, wherein: The conductive component is mounted on the second mounting post in an adjustable height manner.

5. The filter according to claim 1, wherein: The conductive component includes a first tap connected to the first resonator.

6. The filter according to claim 5, characterized in that: The cavity has an opening; the filter also includes a cover plate and a first debugging rod, the cover plate covers one end of the cavity having the opening, the cover plate has a first debugging hole that passes through the cover plate along the thickness direction of the cover plate, and the first debugging rod is height-adjustable and penetrates the first debugging hole to move closer to or away from the first tap.

7. The filter according to claim 5, characterized in that: The conductive component further includes a low-pass filter, and two ends of the first tap are respectively connected to the first resonant component and the low-pass filter.

8. The filter according to claim 7, wherein: The conductive component further includes a second tap, and two ends of the second tap are respectively connected to the second resonant component and the low-pass filter.

9. The filter according to claim 1, wherein: A partition block is provided on the inner bottom wall of the cavity, and the partition block is located between the first resonant cavity and the second resonant cavity. There is a gap between the partition block and the first resonant component and the second resonant component respectively. The conductive component passes through the partition block and extends into the first resonant cavity and the second resonant cavity respectively.

10. The filter according to any one of claims 1 to 9, characterized in that: The cavity body has a third resonant cavity, the third resonant cavity is adjacent to and communicates with the first resonant cavity, a third resonant component is installed in the third resonant cavity, and the third resonant component is connected to the first resonant component via a first coupling rib; And / or, the cavity has a fourth resonant cavity, the fourth resonant cavity is adjacent to and connected to the second resonant cavity, a fourth resonant component is installed in the fourth resonant cavity, and the fourth resonant component is connected to the second resonant component via a second coupling rib.

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