Microstrip suspended line filter

Abstract

The utility model provides a microstrip suspended line filter, which relates to the technical field of radio frequency and filters in wireless communication, and comprises an outer shell, a circuit board structure and a resonance assembly, and a plurality of cavities are arranged in the outer shell; the resonance assemblies are arranged in the corresponding cavities; the circuit board structure is arranged in the outer shell, and the circuit board structure is matched with the corresponding resonance assembly. According to the utility model, the technical problems in the prior art that frequency reduction and positive and negative coupling cannot be realized at the same time due to reduction of the size of the filter, and the weight of the filter is heavy due to more metal pieces in the cavity are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of radio frequency and filters in wireless communication, in particular to a microstrip suspension line filter. Background Art

[0002] A filter is a frequency-selective device that allows specific frequency components in a signal to pass through while greatly attenuating other frequency components. The frequency-selective function of the filter can be used to filter out interference noise or perform spectrum analysis. In other words, any device or system that allows specific frequency components in a signal to pass through while greatly attenuating or suppressing other frequency components is called a filter.

[0003] Most of the current filter products need to achieve the same frequency band in a smaller volume due to the requirements for smaller and lighter volumes.

[0004] However, the existing conventional coaxial cavity has limited lowerable frequencies and achievable bandwidths, which results in miniaturized filters that cannot simultaneously achieve the functions of lowering the frequency and positive and negative coupling, and there are many metal parts in the resonant cavity, resulting in a heavier device. Utility Model Content

[0005] The utility model aims to provide a microstrip suspended line filter to alleviate the technical problems existing in the prior art that the frequency cannot be reduced and positive and negative coupling cannot be achieved simultaneously due to the reduction of the volume of the filter, and the filter is heavy due to the large number of metal parts in the cavity.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In a first aspect, the utility model provides a microstrip suspension line filter, comprising an outer shell, a circuit board structure and a resonant component, wherein a plurality of cavities are provided in the outer shell;

[0008] The resonant component is disposed in the corresponding cavity;

[0009] The circuit board structure is arranged in the outer shell, and the circuit board structure matches the corresponding resonant component.

[0010] Furthermore, the circuit board structure includes a microstrip line component and a circuit board body, the microstrip line component is connected to the circuit board body, and the microstrip line component and the circuit board body are arranged in the outer shell;

[0011] The circuit board body is provided with a ring-shaped monomer for inserting the resonant component.

[0012] Furthermore, the microstrip line component includes a ring-shaped microstrip line and a positively coupled microstrip line, the ring-shaped microstrip line is connected to the corresponding ring-shaped monomer, and adjacent ring-shaped microstrip lines are connected through the positively coupled microstrip line.

[0013] Further, the annular microstrip lines are provided in two groups, the first group of the annular microstrip lines is provided with three and is spaced apart along the first direction, and the second group of the annular microstrip lines is provided with two and is spaced apart along the first direction, and the two groups of the annular microstrip lines are spaced apart along the second direction;

[0014] The first direction is perpendicular to the second direction.

[0015] Furthermore, the microstrip line component further includes a negative coupling microstrip line, and two ends of the negative coupling microstrip line are respectively connected to the annular monomer of the second group of annular microstrip lines.

[0016] Furthermore, a copper clad member is provided on a side of the circuit board body facing away from the microstrip line assembly;

[0017] The circuit board body is used to be connected to the outer shell through the copper cladding.

[0018] Furthermore, at least one copper clad component is provided, and the copper clad component is provided at a location where the circuit board body is provided with the corresponding positive coupling microstrip line.

[0019] Furthermore, the resonance component includes a resonance disk and a resonance rod, the resonance disk is connected to one end of the resonance rod, and the resonance disk and the resonance rod are arranged in the corresponding cavity.

[0020] Furthermore, the resonance rod passes through the circuit board structure, and the circuit board structure is movably disposed between the resonance disk and the free end of the resonance rod.

[0021] Furthermore, the outer shell is provided with two interfaces, and the two interfaces are respectively connected to the cavities at two ends of the outer shell.

[0022] The utility model can achieve the following beneficial effects:

[0023] In a first aspect, the utility model provides a microstrip suspension line filter, comprising an outer shell, a circuit board structure and a resonant component, wherein a plurality of cavities are provided in the outer shell; the resonant component is arranged in the corresponding cavity; the circuit board structure is arranged in the outer shell, and the circuit board structure matches the corresponding resonant component.

[0024] In the utility model, a plurality of cavities are provided in the outer shell, and a corresponding resonant component is arranged in each cavity, and a circuit board structure is provided in the outer shell. After the plurality of resonant components are arranged in a smaller style, the circuit board structure is matched with each resonant component respectively, so as to simultaneously meet the requirements of lowering the frequency, realizing positive and negative coupling, and reducing the volume.

[0025] Compared with the prior art, the microstrip suspension line filter provided by the utility model arranges multiple resonant components into a smaller style, and the circuit board structure is matched with each resonant component respectively, so as to simultaneously meet the requirements of lowering the frequency, achieving positive and negative coupling, and reducing the volume.

[0026] In summary, the utility model at least alleviates the technical problems existing in the prior art that the frequency cannot be reduced and positive and negative coupling cannot be achieved simultaneously due to reducing the volume of the filter, and the filter is heavy due to the large number of metal parts in the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the structure of a microstrip suspended line filter provided by an embodiment of the utility model when viewed from above;

[0029] Figure 2 A schematic diagram of the three-dimensional structure of a microstrip suspended line filter provided by an embodiment of the utility model;

[0030] Figure 3 A schematic top view of a circuit board structure of a microstrip suspended line filter provided in an embodiment of the utility model;

[0031] Figure 4 A bottom view schematic diagram of a circuit board structure of a microstrip suspended line filter provided by an embodiment of the utility model;

[0032] Figure 5 A schematic diagram of the side structure of a microstrip suspended line filter provided by an embodiment of the utility model;

[0033] Figure 6 for Figure 5 Schematic diagram of the AA section structure;

[0034] Figure 7 It is a schematic diagram of the structure of a filter in the prior art when viewed from above.

[0035] Icons: 1-outer shell; 11-cavity; 111-interface; 2-circuit board structure; 21-microstrip line component; 211-ring microstrip line; 212-positively coupled microstrip line; 213-negatively coupled microstrip line; 22-circuit board body; 221-copper clad; 3-resonance component; 31-resonance disk; 32-resonance rod. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present utility model, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0043] Embodiment 1

[0044] This embodiment provides a microstrip suspension line filter. Figure 1 The microstrip suspension line filter includes an outer shell 1, a circuit board structure 2 and a resonant component 3. A plurality of cavities 11 are opened in the outer shell 1; the resonant component 3 is arranged in the corresponding cavity 11; the circuit board structure 2 is arranged in the outer shell 1, and the circuit board structure 2 is matched with the corresponding resonant component 3.

[0045] The embodiments of the utility model at least alleviate the technical problems existing in the prior art that the frequency cannot be reduced and positive and negative coupling cannot be achieved simultaneously due to the reduction of the volume of the filter, and the filter is heavy due to the large number of metal parts in the cavity.

[0046] In the embodiment of the utility model, a plurality of cavities 11 are opened in the outer shell 1, and a corresponding resonant component 3 is arranged in each cavity 11, and a circuit board structure 2 is provided in the outer shell 1. After the plurality of resonant components 3 are arranged in a smaller style, the circuit board structure 2 is matched with each resonant component 3 respectively, so as to simultaneously meet the requirements of lowering the frequency, realizing positive and negative coupling, and reducing the volume.

[0047] Compared with the prior art, the microstrip suspension line filter provided in the embodiment of the utility model arranges multiple resonant components 3 into a smaller style, and the circuit board structure 2 is matched with each resonant component 3 respectively, so as to simultaneously meet the requirements of lowering the frequency, realizing positive and negative coupling, and reducing the volume.

[0048] In an optional implementation manner of this embodiment, refer to Figure 3 or Figure 4 The circuit board structure 2 includes a microstrip line component 21 and a circuit board body 22. The microstrip line component 21 is connected to the circuit board body 22, and the microstrip line component 21 and the circuit board body 22 are arranged in the outer shell 1; the circuit board body 22 is provided with a ring-shaped monomer for inserting the resonance component 3.

[0049] Specifically: a microstrip line component 21 is provided on the front of the circuit board body 22 , and the connection method between the two is preferably to print the microstrip line component 21 on the front of the circuit board body 22 , and the printed microstrip line component 21 matches each resonant component 3 .

[0050] Further, refer to Figure 3 The microstrip line component 21 includes a ring microstrip line 211 and a positive coupling microstrip line 212 . The ring microstrip line 211 is connected to the corresponding ring monomer, and adjacent ring microstrip lines 211 are connected through the positive coupling microstrip line 212 .

[0051] Specifically: the shape of adjacent annular microstrip lines 211 includes a closed or open circular ring shape, and each annular microstrip line 211 is arranged below the resonance disk 31 of the corresponding resonance component 3, and the annular microstrip line 211 arranged on the circuit board body 22 can adjust the height according to actual needs, and when making the annular microstrip line 211, the size can also be adjusted according to the requirements of the actual required frequency band; and the positive coupling microstrip line 212 can also change the position and width according to the required coupling amount.

[0052] Further, refer to Figure 3 There are two groups of annular microstrip lines 211, the first group of annular microstrip lines 211 is provided with three and are spaced apart along the first direction, and the second group of annular microstrip lines 211 is provided with two and are spaced apart along the first direction, and the two groups of annular microstrip lines 211 are spaced apart along the second direction; the first direction is perpendicular to the second direction.

[0053] Specifically: the five annular microstrip lines 211 are divided into two groups, one of which has three and is spaced apart along a straight line; the other group has two and is spaced apart along the same direction, there is a gap between the two groups, and the two annular microstrip lines 211 of the second group are arranged in the gap between the three annular microstrip lines 211 of the first group; preferably, the two annular microstrip lines 211 of the second group are both in the shape of open circular rings, and the three annular microstrip lines 211 of the first group are all in the shape of closed circular rings.

[0054] Preferably, a positive coupling microstrip line 212 is provided between the two ring microstrip lines 211 of the second group, and the two ring microstrip lines 211 are respectively connected to the adjacent ring microstrip lines 211 of the first group through the positive coupling microstrip line 212; and the three ring microstrip lines 211 of the first group are connected through the positive coupling microstrip line 212.

[0055] Further, see Figure 3 The microstrip line component 21 further includes a negative coupling microstrip line 213 , and two ends of the negative coupling microstrip line 213 are respectively connected to the annular monomers of the second group of annular microstrip lines 211 .

[0056] Specifically: both ends of the negative coupling microstrip line 213 are respectively connected to the annular monomers of the second group of annular microstrip lines 211; and preferably, the user can change the position and width of the negative coupling microstrip line 213 according to the required coupling amount.

[0057] In an optional implementation manner of this embodiment, refer to Figure 4 A copper clad member 221 is provided on one side of the circuit board body 22 facing away from the microstrip line component 21 ; the circuit board body 22 is used to be connected to the outer shell 1 through the copper clad member 221 .

[0058] Specifically, a plurality of copper-clad components 221 are provided on a side of the circuit board body 22 facing away from the microstrip line component 21 , and the circuit board body 22 is fixed to the inner wall of the cavity 11 of the outer shell 1 by welding through the copper-clad components 221 .

[0059] Further, see Figure 4 At least one copper-clad member 221 is provided, and the copper-clad member 221 is provided at a location where the circuit board body 22 is provided with a corresponding positive coupling microstrip line 212 .

[0060] Specifically: the copper clad member 221 is disposed at a location where the circuit board body 22 is provided with the corresponding positive coupling microstrip line 212 ; and preferably, the copper clad member 221 is located at the center of a portion of the circuit board body 22 where the positive coupling microstrip line 212 is provided.

[0061] In an optional implementation manner of this embodiment, refer to Figure 5 or Figure 6 The resonance component 3 includes a resonance disk 31 and a resonance rod 32 , the resonance disk 31 is connected to one end of the resonance rod 32 , and the resonance disk 31 and the resonance rod 32 are arranged in the corresponding cavity 11 .

[0062] Specifically: the resonance disk 31 is connected to one end of the resonance rod 32, and the resonance disk 31 and the resonance rod 32 are arranged in the corresponding cavity 11; and the circuit board body 22 is located below the resonance disk 31, and the height of the circuit board body 22 can be changed according to actual needs, that is, the distance between the circuit board body 22 and the resonance disk 31 is changed.

[0063] Further, see Figure 6 The resonance rod 32 passes through the circuit board structure 2 , and the circuit board structure 2 is movably disposed between the resonance disk 31 and the free end of the resonance rod 32 .

[0064] Specifically, the resonance rod 32 passes through the corresponding annular area of ​​the circuit board structure 2 , and the user can move the circuit board structure 2 along the extension direction of the resonance rod 32 according to actual use needs.

[0065] In an optional implementation manner of this embodiment, refer to Figure 1 or Figure 2The outer shell 1 is provided with two interfaces 111 , and the two interfaces 111 are respectively connected to the cavities 11 at two ends of the outer shell 1 .

[0066] Specifically, the two interfaces 111 are respectively connected to the cavities 11 at the two ends of the outer shell 1 , and the two interfaces 111 are tubular structures, so that the external connection device can be connected to the resonance components 3 in the cavities at the two ends.

[0067] Reference Figure 1 or Figure 7 Compared with the prior art, the microstrip suspension line filter provided by the present application effectively reduces the volume of the filter and can simultaneously achieve the functions of reducing the frequency and realizing positive and negative coupling.

[0068] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other; the above embodiments in this specification are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that: it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A microstrip suspended line filter, characterized in that: It comprises an outer shell (1), a circuit board structure (2) and a resonant component (3), wherein a plurality of cavities (11) are provided in the outer shell (1); The resonant component (3) is arranged in the corresponding cavity (11); The circuit board structure (2) is arranged in the outer shell (1), and the circuit board structure (2) matches the corresponding resonant component (3).

2. The microstrip suspended line filter according to claim 1, characterized in that: The circuit board structure (2) comprises a microstrip line component (21) and a circuit board body (22), the microstrip line component (21) is connected to the circuit board body (22), and the microstrip line component (21) and the circuit board body (22) are arranged in the outer shell (1); The circuit board body (22) is provided with a ring-shaped monomer for inserting the resonant component (3).

3. The microstrip suspended line filter according to claim 2, characterized in that: The microstrip line component (21) comprises a ring-shaped microstrip line (211) and a positive coupling microstrip line (212); the ring-shaped microstrip line (211) is connected to the corresponding annular monomer, and adjacent ring-shaped microstrip lines (211) are connected via the positive coupling microstrip line (212).

4. The microstrip suspended line filter according to claim 3, characterized in that: The annular microstrip lines (211) are provided in two groups, the first group of the annular microstrip lines (211) are provided in three groups and are spaced apart along a first direction, and the second group of the annular microstrip lines (211) are provided in two groups and are spaced apart along the first direction, and the two groups of the annular microstrip lines (211) are spaced apart along a second direction; The first direction is perpendicular to the second direction.

5. The microstrip suspended line filter according to claim 4, characterized in that: The microstrip line component (21) further comprises a negative coupling microstrip line (213), and two ends of the negative coupling microstrip line (213) are respectively connected to the annular monomers of the second group of annular microstrip lines (211).

6. The microstrip suspended line filter according to claim 3, characterized in that: A copper-clad part (221) is provided on a side of the circuit board body (22) facing away from the microstrip line component (21); The circuit board body (22) is used to be connected to the outer shell (1) via the copper cladding (221).

7. The microstrip suspended line filter according to claim 6, characterized in that: At least one copper-clad component (221) is provided, and the copper-clad component (221) is provided at a location where the circuit board body (22) is provided with the corresponding positive coupling microstrip line (212).

8. The microstrip suspended line filter according to claim 1, characterized in that: The resonance component (3) comprises a resonance disk (31) and a resonance rod (32), wherein the resonance disk (31) is connected to one end of the resonance rod (32), and the resonance disk (31) and the resonance rod (32) are arranged in the corresponding cavity (11).

9. The microstrip suspended line filter according to claim 8, characterized in that: The resonance rod (32) passes through the circuit board structure (2), and the circuit board structure (2) is movably arranged between the resonance disk (31) and the free end of the resonance rod (32).

10. The microstrip suspended line filter according to any one of claims 1 to 9, characterized in that: The outer shell (1) is provided with two interfaces (111), and the two interfaces (111) are respectively connected to the cavities (11) located at two ends of the outer shell (1).

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