Resonator filter and antenna

Abstract

The application relates to the technical field of filters, and provides a resonant sheet filter and an antenna. The former comprises a shell and resonant sheets; the inside of the shell has a containing cavity, and the outer wall of the shell is provided with a debugging piece; a plurality of resonant sheets are arranged in the containing cavity, and the resonant sheets are provided with through holes corresponding to the debugging piece; a frequency debugging piece is arranged in the through holes to form a ring-shaped coupling. The ring-shaped coupling structure arranged in the through holes has the beneficial effect of significantly expanding the frequency debugging range, and can effectively reduce the situation of unstable waveform caused by the frequency debugging piece deviating from the center during the debugging process. Due to the characteristics of significantly expanding the frequency debugging range and stable waveform during the debugging, the resonant sheet filter is easier to debug, is not sensitive to the tolerance of each component during assembly, and is more conducive to batch production.

Description

Technical Field

[0001] This application relates to the field of filter technology, and in particular to a resonator filter. Background Technology

[0002] Currently, the miniaturization of metal filters in existing technologies generally replaces traditional metal resonant pillars with resonant plates or conventional air suspension wires. The resonant plate approach involves using die casting or machining to make the cavity wall very narrow, thus reducing weight. The resonator is then fabricated from sheet metal, further reducing the cavity height and achieving miniaturization.

[0003] In existing sheet metal filters, after assembly, filtering is generally achieved through post-processing frequency tuning and coupling of the resonator. There are roughly three existing tuning methods for sheet metal filters: the first is feeding the tuning component perpendicular to the resonator; the second is feeding the tuning component parallel to the resonator; and the third is tuning without a tuning component (essentially setting the tuning component as a pressure plate located on the sheet metal filter shell wall) by pressing. However, all three existing tuning structures for sheet metal filters share a common problem: the frequency adjustment range of the resonator is relatively narrow. Summary of the Invention

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a resonant filter and an antenna.

[0005] The resonant filter provided in this application includes a housing and a resonant plate;

[0006] The housing has an internal cavity and an adjustment component on its outer wall;

[0007] Multiple resonator plates are provided in the receiving cavity, and each resonator plate has a through hole corresponding to the debugging component;

[0008] The adjustment component can adjust the depth to which it extends into the through hole.

[0009] In one possible design, the resonant plate includes a first plate body and a second plate body;

[0010] The first sheet extends along a first direction;

[0011] The second piece extends along the second direction;

[0012] The second sheet is bent and connected to the top of the first sheet;

[0013] The through hole is formed in the second piece.

[0014] In one possible design, the resonator also includes a mounting substrate;

[0015] Multiple resonant plates are arranged side by side with their respective first plates spaced apart, and their bottom ends are respectively perpendicularly connected to the mounting base.

[0016] In one possible design, the mounting base and the resonant plate are integrally stamped from sheet metal.

[0017] In one possible design, the tuning component includes a frequency tuning component;

[0018] The frequency tuning component and the through hole are arranged in a one-to-one correspondence along the vertical direction.

[0019] In one possible design, the frequency tuning component is a screw assembly disposed on the outer wall of the housing;

[0020] The screw assembly can adjust its length extending downward into the through hole to adjust the frequency of the resonator.

[0021] In one possible design, the debugger also includes a coupling debugger;

[0022] The coupling and tuning component is positioned between two adjacent resonator plates.

[0023] In one possible design, the coupling and adjustment component is a screw assembly disposed on the outer wall of the housing;

[0024] The screw assembly is adjustable in the length by which it extends downward into the cavity of the housing.

[0025] In one possible design, the housing also includes a top cover.

[0026] Multiple of the debugging components are provided on the side of the top cover plate opposite to the housing.

[0027] In one possible design, the housing also includes a bottom base;

[0028] The bottom base has an insertion part for inserting the resonator.

[0029] In one possible design, the resonator also includes a downwardly bent input connection and an upwardly bent low-pass connection.

[0030] In one possible design, a low-pass component is also provided in the housing;

[0031] The top end of the low-pass component is connected to the low-pass connector, and the bottom end of the low-pass component is provided with an output connector.

[0032] In addition, this application also provides an antenna that includes the above-described resonant filter.

[0033] The technical solution provided in this application has the following advantages compared with the prior art:

[0034] The resonant filter provided in this application includes a housing and resonant plates. The housing has an internal cavity and an adjustment component on its outer wall. Multiple resonant plates are arranged in the cavity, and each resonant plate has a through hole corresponding to the adjustment component. The adjustment component can adjust the depth of its insertion into the through hole, which has the beneficial effect of significantly expanding the frequency adjustment range. Moreover, due to its significantly expanded frequency adjustment range, the resonant filter is easier to adjust, the waveform is stable during adjustment, it is not sensitive to the tolerance of each component during assembly, and it is more conducive to mass production.

[0035] The antenna provided in this application includes the resonant filter described above and can achieve the same beneficial effects. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A three-dimensional half-sectional view of the resonator filter provided in the embodiments of this application;

[0039] Figure 2 This is a structural diagram of the resonator in the resonator filter provided in the embodiments of this application;

[0040] Figure 3 A schematic diagram illustrating the adjustment of the tuning components and the resonant plate in the resonant plate filter provided in the embodiments of this application;

[0041] Figure 4 A comparison diagram of the frequency modulation range of the resonant filter provided in the embodiments of this application and existing resonant filters.

[0042] Reference numerals: 1. Housing; 11. Debugging component; 111. Frequency debugging component; 112. Coupling debugging component; 12. Top cover plate; 13. Bottom base; 131. Insertion part; 2. Resonator plate; 21. First plate body; 22. Second plate body; 221. Through hole; 23. Low-pass connection part; 24. Mounting base; 25. Input connection part; 26. Low-pass component; 261. Output connection part. Detailed Implementation

[0043] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0044] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0045] Combination Figure 1 , Figure 3 and Figure 4 As shown, this application provides a resonant filter, which includes a housing 1 and a resonant 2; the housing 1 has an internal cavity and an adjustment component 11 on its outer wall; multiple resonant 2s are provided in the cavity, and the resonant 2s have through holes 221 corresponding to the adjustment component 11; wherein, the adjustment component 11 can adjust the depth of itself extending into the through hole 221.

[0046] When assembling and debugging the resonant filter, firstly, multiple resonant plates 2 are installed in the receiving cavity of the housing 1, then the debugging component 11 is installed on the outer wall of the housing 1, and finally, the resonant frequency of the resonant plate 2 is adjusted to meet the operating conditions requirements of the resonant filter by adjusting the depth of the debugging component 11 extending into the through hole 221.

[0047] Combination Figure 4 To further explain, the resonant filter provided in this application, under the same adjustment depth of the tuning component 11, has a much higher frequency tuning range for the resonant plate 2 than the two existing frequency tuning methods where the tuning component depth direction is parallel to the resonant plate and perpendicular to the resonant plate. Taking the tuning component 11 with the same adjustment depth of 3mm as an example, the frequency tuning range generated by the two existing frequency tuning methods is only about 90Hz, while the frequency tuning range generated by the resonant filter provided in this application is about 220Hz, which is significantly higher than the tuning range of the existing filter frequency tuning methods.

[0048] In summary, the resonant filter provided in this application has the beneficial effect of significantly expanding the frequency tuning range. Moreover, due to its significantly expanded frequency tuning range, the resonant filter is easier to tune, the waveform is stable during tuning, it is not sensitive to the tolerances of individual components during assembly, and it is more conducive to mass production.

[0049] In some specific embodiments, the resonant plate 2 includes a first plate body 21 and a second plate body 22; the first plate body 21 extends along a first direction; the second plate body 22 extends along a second direction; the top ends of the second plate body 22 and the first plate body 21 are bent and connected one by one; wherein, a through hole 221 is formed in the second plate body 22.

[0050] Specifically, in combination Figure 2 and Figure 3 In further detail, a first sheet 21 and a second sheet 22 are provided in the resonant sheet 2. The first sheet 21 and the second sheet 22 are connected by smooth bending respectively. Moreover, the first direction can be a horizontal direction and the second direction can be a vertical direction.

[0051] Through holes 221 are correspondingly opened on the second plate 22. The shape and size of the through holes 221 can be set to be the same or different. Thus, the resonator 2 has multiple bent portions that are similar to inverted "L" shapes. Compared with the straight plate resonator in the prior art, the bent resonator in the resonator 2 provided in this application has a larger coupling amount. Moreover, each bent resonator can be provided with a through hole 221, and each through hole 221 can be matched with a tuning component 11 for frequency tuning.

[0052] Furthermore, the specific locations of the aforementioned multiple first pieces 21 are not limited. The multiple first pieces 21 can be arranged at equal intervals along the same straight line, or they can be arranged at random intervals. No further limitations will be specified here.

[0053] The specific arrangement of the resonator 2 described above has the functions of simple structure and frequency adjustment that can be performed simultaneously with multiple tuning components 11.

[0054] In some specific embodiments, the resonant plate 2 further includes a mounting base 24; multiple resonant plates 2 are arranged side by side at intervals through their respective first plates 21 and their bottom ends are respectively perpendicularly connected to the mounting base 24.

[0055] Specifically, in combination Figure 2 In further detail, the aforementioned mounting base 24 can be configured as a strip and integrally connected with a plurality of first pieces 21. The plurality of first pieces 21 are configured to be parallel to each other and their bottom ends are perpendicular to the mounting base 24. Moreover, the length of the plurality of first pieces 21 and the spacing between adjacent first pieces 21 can be configured to be the same or different.

[0056] The resonant plate 2 is provided with the aforementioned mounting base 24, which allows multiple first plates 21 to be installed simultaneously in the housing 1. Furthermore, the length of each first plate 21 and the spacing between adjacent first plates 21 can be directly defined during the fabrication of the resonant plate 2, eliminating the need for additional adjustments during the installation process.

[0057] In some specific embodiments, the mounting base 24 and the resonant plate 2 are integrally stamped from sheet metal.

[0058] The mounting base 24 and the resonant plate 2 are made of sheet metal by stamping. In this way, the first plate 21, the second plate 22 and the through hole 221 of the multiple resonant plates 2 can be processed into one piece by stamping. Moreover, the resonant plate 2 made of sheet metal by stamping can save the space occupied inside the housing 1, so that the housing 1 of the resonant plate filter can be made smaller.

[0059] In some specific embodiments, the debugging component 11 includes a frequency debugging component 111; the frequency debugging component 111 and the through hole 221 are arranged in a one-to-one correspondence along the vertical direction.

[0060] Specifically, in combination Figure 1 In further detail, the frequency tuning component 111 is configured to correspond one-to-one with the through hole 221 in the resonant plate 2 in the vertical direction. The frequency tuning component 111 can adjust its depth of insertion into the through hole 221 to perform frequency tuning of the resonant plate 2. The frequency tuning component 111 can be specifically, but not limited to, a telescopic rod made of metal, a threaded rod made of metal, or other rods with adjustable length feed.

[0061] In some specific embodiments, the frequency tuning component 111 is a screw assembly disposed on the outer wall of the housing 1; the screw assembly can adjust its length extending downward into the through hole 221.

[0062] Specifically, in combination Figure 1 In further detail, the screw assembly may include a nut fixed to the outer wall of the housing 1 and a screw threaded into the nut. Thus, only a through hole corresponding to the nut needs to be provided in the outer wall of the housing 1 for the screw thread to pass through. By turning the screw thread to feed it helically downward relative to the nut or to retract it helically upward, the depth of the frequency adjustment component 111 inserted into the through hole 221 can be precisely changed, thereby realizing the function of adjusting the frequency of the resonator 2.

[0063] The aforementioned frequency tuning component 111 has a simple structure and provides precise frequency adjustment for the resonator 2.

[0064] In some specific embodiments, the debugging component 11 further includes a coupling debugging component 112; the coupling debugging component 112 is disposed between two adjacent resonant plates 2.

[0065] Specifically, in combination Figure 1 In further detail, the coupling adjustment component 112 can be set at the center of two adjacent resonators 2, and one coupling adjustment component 112 can be set between every two adjacent resonators 2.

[0066] By setting multiple coupling adjustment components 112, the coupling coefficients between each first piece 21 and each second piece 22 in two adjacent resonant plates 2 can be adjusted to conform to the coupling coefficients of the resonant plate filter under operating conditions.

[0067] In some specific embodiments, the coupling adjustment component 112 is a screw assembly disposed on the outer wall of the housing 1; the screw assembly can adjust the length of itself extending downward into the inner cavity of the housing 1.

[0068] Specifically, in combination Figure 1 To elaborate further, the coupling adjustment component 112 is also specifically configured as a screw assembly screwed onto the outer wall of the housing 1. The screw assembly may include a nut fixed to the outer wall of the housing 1 and a screw inserted into the nut. Thus, only a through hole corresponding to the nut needs to be provided in the outer wall of the housing 1 for the screw to pass through. By turning the screw to feed it helically downward relative to the nut or to retract it helically upward, the depth of the coupling adjustment component 112 inserted into the housing 1 can be precisely changed, thereby realizing the function of adjusting the coupling coefficient of the resonator 2. It has the functions of simple structure and precise coupling coefficient adjustment of the resonator 2.

[0069] Of course, the frequency tuning component 111 and coupling tuning component 112 mentioned above can also be set as other rods that can realize feed length adjustment, such as telescopic rods.

[0070] In some specific embodiments, the housing 1 also includes a top cover 12; multiple debugging components 11 are provided on the side of the top cover 12 facing away from the housing 1.

[0071] Specifically, in combination Figure 1In further detail, the top cover 12 can be specifically configured to be detachably fitted onto the housing 1 or integrally connected to the housing 1. The adjustment components 11 are placed on the side of the top cover 12 facing away from the housing 1. In this way, when assembling the resonant filter, the adjustment components 11 can be installed sequentially in the top cover 12 and then fitted onto the housing 1 together with the top cover 12. This allows multiple adjustment components 11 to be installed on the housing 1 at the same time. Moreover, when the resonant filter needs to be disassembled to replace the components in the housing 1, multiple adjustment components 11 can be disassembled together with the top cover 12. Furthermore, when reassembling, the feed adjustment depth of each adjustment component 11 will not be affected.

[0072] The specific arrangement of the top cover plate 12 described above has the functions of simple structure and simultaneous installation of multiple debugging components 11 on the housing 1.

[0073] In some specific embodiments, the housing 1 also includes a bottom base 13; the bottom base 13 has an insertion part 131 for inserting the resonant plate 2.

[0074] Specifically, in combination Figure 1 and Figure 2 In further detail, multiple insertion parts 131 can be provided correspondingly on the bottom base 13 of the housing 1. Each insertion part 131 is used to insert a resonant plate 2. Moreover, the insertion part 131 can be specifically, but not limited to, a strip groove, a circular hole, an oblong hole or some other shape. Furthermore, it can be configured to have an interference fit with the resonant plate 2, thereby realizing the function of stably installing the resonant plate 2 on the bottom base 13.

[0075] The specific arrangement of the bottom base 13 described above has the functions of simple structure and stable installation of multiple resonant plates 2 on the housing 1.

[0076] In some specific embodiments, the resonant plate 2 is further provided with a downwardly bent input connection portion 25 and an upwardly bent low-pass connection portion 23.

[0077] Specifically, in combination Figure 1 and Figure 2 In further detail, the input connection part 25 can be specifically configured as an inverted L-shape, and can be electrically connected to the input port through the input connection part 25; the low-pass connection part 23 can be specifically configured as a Z-shape, and can be electrically connected to the resonator 2 through the low-pass connection part 23.

[0078] In some specific embodiments, a low-pass component 26 is also provided in the housing 1; the top end of the low-pass component 26 is connected to the low-pass connection part 23, and the bottom end of the low-pass component 26 is provided with an output connection part 261.

[0079] Specifically, in combination Figure 1 To elaborate further, the specific connection arrangement of the aforementioned low-pass component 26 and output connection 261 has the advantages of compact structure and stable installation connection.

[0080] In addition, this disclosure also provides an antenna including the aforementioned resonant filter. This antenna can achieve all the beneficial effects of the aforementioned resonant filter, which will not be described in detail here.

[0081] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0082] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A resonant filter, characterized in that, include: The housing (1) has an internal cavity and an external wall with a debugging component (11). The resonant plate (2) is provided in a plurality of the cavity, and the resonant plate (2) has a through hole (221) corresponding to the debugging component (11). The adjustment component (11) is capable of adjusting the depth to which it extends into the through hole (221); The resonator (2) includes: The first piece (21) extends along the first direction, and the large surface of the first piece (21) is perpendicular to the second direction; The second piece (22) extends along the second direction; The second piece (22) is bent and connected to the top end of the first piece (21); the through hole (221) is opened in the second piece (22). Multiple first sheet bodies (21) are spaced apart along a third direction, the first direction intersects the third direction, the second direction intersects the third direction, and the first direction intersects the second direction; It also includes a coupling adjustment component (112), which is disposed between two adjacent resonators (2); One of the resonant plates (2) is provided with a downwardly bent input connection portion (25), and a second resonant plate is provided with an upwardly bent low-pass connection portion (23). The housing (1) is also provided with a low-pass component (26); The top end of the low-pass component (26) is connected to the low-pass connector (23), the bottom end of the low-pass component (26) is provided with an output connector (261), and the input connector (25) is electrically connected to the input port.

2. The resonant filter according to claim 1, characterized in that, The resonant plate (2) also includes a mounting base (24); Multiple resonant plates (2) are arranged side by side at intervals through their respective first plates (21) and their bottom ends are respectively perpendicularly connected to the mounting base (24).

3. The resonant filter according to claim 2, characterized in that, The mounting base (24) and the resonant plate (2) are integrally stamped from sheet metal.

4. The resonant filter according to claim 1, characterized in that, The debugging component (11) includes a frequency debugging component (111); The frequency tuning component (111) and the through hole (221) are arranged in a vertical direction in a one-to-one correspondence.

5. The resonant filter according to claim 4, characterized in that, The frequency tuning component (111) is a screw assembly disposed on the outer wall of the housing (1); The screw assembly can adjust its length extending downward into the through hole (221) to adjust the frequency of the resonant plate (2).

6. The resonant filter according to claim 1, characterized in that, The coupling and debugging component (112) is a screw assembly disposed on the outer wall of the housing (1); The screw assembly can adjust the length of itself extending downward into the inner cavity of the housing (1).

7. The resonant filter according to claim 1, characterized in that, The housing (1) also includes a top cover (12); The debugging components (11) are provided in multiple locations on the side of the top cover (12) facing away from the housing (1).

8. The resonant filter according to claim 7, characterized in that, The housing (1) also includes a bottom base (13); The bottom base (13) has an insertion part (131) for inserting the resonator (2).

9. An antenna, characterized in that, The resonant filter includes any one of claims 1 to 8.

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