Filter

Abstract

The utility model provides a filter, and belongs to the technical field of filters. The filter has a thickness direction and comprises a base, a coupling assembly and a plurality of resonance rods. One side of the base along the thickness direction is provided with a first wall surface, the first wall surface is provided with a plurality of clapboards, the surfaces of the first wall surface and the clapboards enclose to form a plurality of mutually communicated accommodating spaces, and two adjacent clapboards are spaced to form a coupling window; the coupling assembly is arranged on one side, facing the partition plate, of the base and located in the coupling window; the plurality of resonance rods are arranged on the first wall surface at intervals, are connected with each other and are accommodated in the accommodating space; the coupling assemblies and the resonant rods are arranged at intervals, and the coupling assemblies are arranged between the two adjacent resonant rods. According to the filter provided by the invention, the coupling assembly is arranged at the coupling window, resonance is generated at the out-of-band far end of the filter through the coupling assembly, and a high-order mode is suppressed, so that the far end of the filter meets the high-suppression requirement, and the high-frequency suppression performance of the filter is greatly improved.

Description

Technical Field

[0001] This application relates to the field of filter technology, and more particularly to a filter. Background Technology

[0002] With the development of mobile technology, filters have become indispensable frequency selection devices. When the high-frequency suppression requirements of a filter are very high, a low-pass filter needs to be added to the filter. Existing filters meet the high-frequency suppression requirements by adding a high-order low-pass filter, but such filters are limited in design. Sometimes there is no space to add a low-pass filter to meet the high-frequency suppression requirements, which limits the application scenarios of the filter. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a filter.

[0004] This application provides the following technical solution: a filter having a thickness direction, comprising:

[0005] The base has a first wall on one side along the thickness direction. The first wall is provided with multiple partitions. The surfaces of the first wall and the partitions enclose multiple interconnected receiving spaces. Two adjacent partitions are spaced apart to form a coupling window.

[0006] A coupling assembly is disposed on the side of the base facing the partition and located within the coupling window;

[0007] Multiple resonant rods are arranged at intervals on the first wall surface and connected, and housed in the receiving space;

[0008] The coupling component and the resonant rod are spaced apart, with the coupling component positioned between two adjacent resonant rods.

[0009] In some embodiments, the coupling assembly includes a coupling post and a coupling rod;

[0010] The coupling column is disposed on the first wall surface, and an installation groove is provided on the side of the coupling column opposite to the first wall surface. The coupling rod is at least partially disposed in the installation groove and connected to the coupling column.

[0011] In some embodiments, the wall of the mounting groove is provided with a first connecting portion, and the side wall of the coupling rod is provided with a second connecting portion, wherein the first connecting portion and the second connecting portion are connected.

[0012] In some embodiments, the first connecting portion is an internal thread, the second connecting portion is an external thread, and the external thread and the internal thread are connected.

[0013] In some embodiments, the first connecting part is a plurality of slots, the plurality of slots being spaced apart along the thickness direction, and the second connecting part is a tooth, the tooth being snapped into the slot.

[0014] In some embodiments, the first wall surface is provided with a plurality of spaced-apart connecting columns, and the resonant rod is connected to the connecting columns and disposed on the side of the connecting columns opposite to the first wall surface.

[0015] In some embodiments, the filter further includes a fixing bolt, and the connecting post has a connecting groove on the side facing away from the first wall surface;

[0016] Along the thickness direction, one end of the fixing bolt passes through the resonant rod and is connected to the groove wall of the connecting groove.

[0017] In some embodiments, the resonant rod has a groove on the side away from the first wall, and a through hole is provided through the bottom of the groove. One end of the fixing bolt facing the first wall passes through the groove and the through hole, and the other end of the fixing bolt away from the first wall abuts against the bottom of the groove.

[0018] In some embodiments, the axis of the coupling component is equidistant from the axes of the two adjacent resonant rods.

[0019] In some embodiments, the distance between the axes of two adjacent resonant rods is L1, and the distance between the axis of the coupling component and the axis of the adjacent resonant rod is L2.

[0020] Among them, L1 and L2 satisfy the relation L1 = 2 * L2.

[0021] The embodiments of this application have the following advantages: The filter provided by this application sets a coupling component at the coupling window, and the coupling component generates resonance at the far end of the filter outside the band, suppressing higher-order modes, so that the far end of the filter meets the high suppression requirement. Since the coupling component is not a resonant rod of the filter itself, the coupling component can play the role of high-frequency suppression, and does not affect the performance of the filter itself, thereby greatly improving the high-frequency suppression performance of the filter.

[0022] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This application provides a schematic diagram of the structure of a filter from one perspective, based on some embodiments thereof.

[0025] Figure 2 This invention provides a schematic diagram of the structure of a filter from another perspective, based on some embodiments of the present application.

[0026] Figure 3 This application provides a schematic diagram of the structure of a base in a filter from one perspective, based on some embodiments of the present application.

[0027] Figure 4 This application provides a schematic diagram of the structure of a resonant rod in a filter from one perspective, based on some embodiments of the present application.

[0028] Figure 5 The response curve of a conventional filter is shown;

[0029] Figure 6 The response curves of a filter provided by some embodiments of this application are shown.

[0030] Explanation of key component symbols:

[0031] 100 - Base; 110 - First wall surface; 200 - Partition; 120 - Accommodation space; 130 - Coupling window; 300 - Coupling assembly; 400 - Resonant rod; 310 - Coupling post; 320 - Coupling rod; 311 - Mounting slot; 140 - Connecting post; 500 - Fixing bolt; 141 - Connecting slot; 410 - Groove; 420 - Through hole. Detailed Implementation

[0032] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0033] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the template description is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] like Figures 1 to 4 As shown, some embodiments of this application provide a filter with a thickness direction, which is mainly used to improve the performance of high-frequency suppression, thereby improving the overall performance of the filter.

[0038] The filter includes a base 100, a coupling component 300, and multiple resonant rods 400.

[0039] The base 100 has a first wall 110 on one side along the thickness direction. The first wall 110 is provided with a plurality of partitions 200. The partitions 200 are spaced apart and perpendicular to the first wall 110, thereby forming a plurality of interconnected receiving spaces 120 by the surfaces of the first wall 110 and the partitions 200.

[0040] Two adjacent partitions 200 are spaced apart to form a coupling window 130.

[0041] In addition, the coupling component 300 is disposed on the side of the base 100 facing the partition 200, and the coupling component 300 is located in the coupling window 130, so that resonance is generated at the far end of the filter outside the band through the coupling component 300 and higher-order modes are suppressed, so that the far end of the filter meets the high suppression requirements, thereby improving the high-frequency suppression performance.

[0042] Multiple resonant rods 400 are arranged at intervals on the first wall surface 110 and connected together, and housed in the receiving space 120. The multiple resonant rods 400 are arranged in an array on the first wall surface 110, that is, the distance from the axis of one of the resonant rods 400 to the axes of the two adjacent resonant rods 400 is equal.

[0043] In this embodiment, the coupling component 300 and the resonant rod 400 are arranged at intervals. The coupling component 300 is disposed between two adjacent resonant rods 400 so that resonance is generated at the far end of the filter outside the band through the coupling component 300, suppressing higher-order modes, so that the far end of the filter meets the high suppression requirement.

[0044] It should be noted that since the coupling component 300 is not part of the resonant rod 400 of the filter itself, the coupling component 300 can play a role in high-frequency suppression without affecting the performance of the filter itself, thereby greatly improving the high-frequency suppression performance of the filter.

[0045] like Figure 2 and Figure 3 As shown, in some embodiments of this application, the coupling component 300 includes a coupling post 310 and a coupling rod 320.

[0046] The connection method between the coupling column 310 and the coupling rod 320 includes any one of the following: threaded connection, bolted connection, snap-fit, adhesive connection, and magnetic connection, which can be specifically set according to the actual situation.

[0047] In addition, the coupling post 310 is disposed on the first wall surface 110, and the connection method between the coupling post 310 and the base 100 includes any one of threaded connection, bolt connection, snap-fit, adhesive, magnetic connection or integral molding.

[0048] In this embodiment, the coupling post 310 and the base 100 are integrally formed to improve the stability of the connection between the coupling post 310 and the base 100.

[0049] It should be noted that the axis of the coupling column 310 is perpendicular to the first wall surface 110.

[0050] The coupling column 310 has an installation groove 311 on the side opposite to the first wall surface 110, and the coupling rod 320 is at least partially disposed in the installation groove 311 and connected to the coupling column 310.

[0051] In addition, the connection method between the coupling rod 320 and the coupling post 310 includes any one of the following: threaded connection, bolted connection, snap-fit, adhesive connection, and magnetic connection.

[0052] It is understood that by movably connecting the coupling rod 320 and the coupling post 310, the installation position between the coupling rod 320 and the coupling post 310 can be adjusted, thereby adjusting the coupling amount.

[0053] In this embodiment, the coupling column 310 can be a cylindrical structure or a polygonal prism structure, which can be specifically set according to the actual situation.

[0054] like Figure 2 and Figure 3 As shown, in some embodiments of this application, the groove wall of the mounting groove 311 is provided with a first connecting part, and the side wall of the coupling rod 320 is provided with a second connecting part, and the first connecting part and the second connecting part are connected.

[0055] In this embodiment, the first connecting part (not shown in the figure) and the second connecting part (not shown in the figure) are detachably connected. While ensuring the stability of the connection between the coupling rod 320 and the coupling post 310, it is also convenient to adjust the position between the coupling rod 320 and the coupling post 310, thereby achieving the purpose of adjusting the coupling amount.

[0056] In some embodiments of this application, the first connecting part is an internal thread, the second connecting part is an external thread, and the external thread and the internal thread are connected.

[0057] It is understandable that by adjusting the coupling rod 320 and the coupling post 310 through a threaded connection, not only can the stability of the connection between the coupling rod 320 and the coupling post 310 be guaranteed, but the convenience of position adjustment between the coupling rod 320 and the coupling post 310 can also be improved, thereby adjusting the coupling amount.

[0058] In some embodiments of this application, the first connecting part is a plurality of slots, the plurality of slots are arranged at intervals along the thickness direction, and the second connecting part is a tooth, the tooth and the slots are snapped together.

[0059] It is understandable that the coupling amount can be adjusted by adjusting the engagement of the locking teeth with one of the multiple locking slots to adjust the connection position between the coupling rod 320 and the coupling post 310.

[0060] like Figure 2 and Figure 4 As shown, in some embodiments of this application, the first wall surface 110 is provided with a plurality of spaced-apart connecting columns 140, the axis of the connecting columns 140 being perpendicular to the first wall surface 110.

[0061] Among them, multiple connecting columns 140 are arranged in an array on the first wall surface 110. The arrangement of the multiple connecting columns 140 can be any one or a combination of two or more of the following: matrix arrangement, ring array, and rhomboid array.

[0062] In addition, the resonant rod 400 is connected to the connecting post 140, and the resonant rod 400 is disposed on the side of the connecting post 140 away from the first wall surface 110.

[0063] In this embodiment, the axis of the resonant rod 400 and the axis of the connecting post 140 coincide with each other.

[0064] like Figure 2 and Figure 3 As shown, in some embodiments of this application, the filter further includes a fixing bolt 500, and the connecting post 140 is provided with a connecting groove 141 on the side opposite to the first wall surface 110, and the groove wall of the connecting groove 141 is provided with threads.

[0065] Along the thickness direction, one end of the fixing bolt 500 passes through the resonant rod 400 and is threaded to the groove wall of the connecting groove 141, so as to fix the resonant rod 400 to the connecting column 140 by fixing the fixing bolt 500, thereby ensuring the stability of the connection between the resonant rod 400 and the connecting column 140, and also improving the convenience of installation or disassembly between the resonant rod 400 and the connecting column 140.

[0066] like Figure 1 and Figure 2 As shown, in some embodiments of this application, the distance from the axis of the coupling component 300 to the axes of the two adjacent resonant rods 400 is equal. It should be noted that this equidistant design ensures a symmetrical distribution of the electromagnetic field between the resonant rods 400 and the coupling rods 320, which is beneficial for mode matching, thereby reducing insertion loss and improving coupling efficiency. Simultaneously, it ensures that the electromagnetic coupling strength between the resonant rods 400 and the coupling rods 320 achieves optimal balance, facilitating critical coupling and meeting specific application requirements.

[0067] At the same time, it can also avoid phase imbalance caused by path differences, thereby maintaining the directionality (such as the isolation of directional couplers) or the amplitude balance of the output signal.

[0068] In some embodiments of this application, the distance between the axes of two adjacent resonant rods 400 is L1, and the distance between the axis of the coupling component 300 and the axis of the adjacent resonant rod 400 is L2.

[0069] Among them, L1 and L2 satisfy the relation L1 = 2 * L2.

[0070] It should be noted that by arranging multiple resonant rods 400 evenly on the first wall 110, the electromagnetic field is distributed more uniformly inside the coupler, avoiding excessively high or low local field strength, thereby reducing mode distortion (such as higher-order mode excitation) and signal distortion. It also helps maintain the accuracy of the signal phase relationship, avoids beamforming errors, and thus ensures the uniformity of the electromagnetic field distribution, signal coupling efficiency, and the stability of system performance.

[0071] like Figure 2 and Figure 4 As shown, in some embodiments of this application, the resonant rod 400 has a groove 410 on the side opposite to the first wall surface 110, and a through hole 420 is provided through the bottom of the groove 410. The axis of the groove 410 and the axis of the through hole 420 coincide, and are also coincident with the axis of the resonant rod 400.

[0072] In this embodiment, the end of the fixing bolt 500 facing the first wall surface 110 passes through the groove 410 and the through hole 420, and connects the fixing bolt 500 to the connecting post 140.

[0073] In addition, the other end of the fixing bolt 500 away from the first wall surface 110 abuts against the bottom of the groove, so that the end of the fixing bolt 500 away from the first wall surface 110 and the connecting column 140 limit the resonant rod 400, thereby fixing the resonant rod 400 to the connecting column 140 by the fixing bolt 500, so as to ensure the stability of the connection between the resonant rod 400 and the base 100.

[0074] like Figure 5 As shown, the traditional filter has a passband of 700MHz and high-frequency suppression of 119dB around 2100MHz. Figure 6 As shown, the filter provided in this application can easily achieve high-frequency suppression of more than 159dB at 2100MHz, which improves high-frequency suppression by 40dB and enhances the overall performance of the filter.

[0075] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0076] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0077] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A filter having a thickness direction, characterized by, The filter comprises: a base, one side of which in the thickness direction has a first wall surface, the first wall surface being provided with a plurality of partitions, the surfaces of the first wall surface and the partitions enclosing a plurality of mutually communicating accommodation spaces, and a coupling window being formed between two adjacent partitions; a coupling assembly arranged on the side of the base facing the partitions and located in the coupling window; a plurality of resonant rods arranged at intervals on the first wall surface and accommodated in the accommodation spaces; the coupling assembly and the resonant rods are arranged at intervals, and the coupling assembly is arranged between two adjacent resonant rods.

2. The filter of claim 1, wherein, The coupling assembly comprises a coupling column and a coupling rod. The coupling column is arranged on the first wall surface, and a mounting groove is formed on the side of the coupling column facing away from the first wall surface, and the coupling rod is at least partially arranged in the mounting groove and connected with the coupling column.

3. The filter of claim 2, wherein, The groove wall of the mounting groove is provided with a first connecting part, and the side wall of the coupling rod is provided with a second connecting part, and the first connecting part and the second connecting part are connected.

4. The filter of claim 3, wherein, The first connecting part is an internal thread, and the second connecting part is an external thread, and the external thread and the internal thread are connected.

5. The filter of claim 3, wherein, The first connecting part is a plurality of clamping grooves arranged at intervals in the thickness direction, and the second connecting part is a clamping tooth, and the clamping tooth and the clamping groove are buckled.

6. The filter according to any one of claims 1 to 5, characterized in that, The first wall surface is provided with a plurality of spaced connecting columns, and the resonant rods are connected with the connecting columns and arranged on the side of the connecting columns facing away from the first wall surface.

7. The filter of claim 6, wherein, The filter further comprises a fixing bolt, and the connecting column is provided with a connecting groove on the side facing away from the first wall surface. In the thickness direction, one end of the fixing bolt is arranged through the resonant rod and connected with the groove wall of the connecting groove.

8. The filter of claim 7, wherein, The resonant rod is provided with a groove on the side facing away from the first wall surface, a through hole is formed through the groove bottom of the groove, one end of the fixing bolt facing the first wall surface is arranged through the groove and the through hole, and the other end of the fixing bolt facing away from the first wall surface abuts against the groove bottom.

9. The filter of claim 1, wherein, The distance between the axis of the coupling assembly and the axes of the two adjacent resonant rods is L2.

10. The filter of claim 9, wherein, The distance between the axes of the two adjacent resonant rods is L1, and the distance between the axis of the coupling assembly and the axes of the adjacent resonant rods is L2. L1 and L2 satisfy the relationship L1=2*L2.

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