Filter and filter module

Abstract

The utility model provides a filter and a filter module, and belongs to the technical field of filtering. The filter comprises a body. In a first direction, the body is provided with a first surface and a second surface which are oppositely arranged, and the body is provided with a plurality of resonant cavities penetrating through the first surface; the body is provided with an airflow channel penetrating through the first surface and the second surface, so that the two adjacent resonant cavities are separated through the airflow channel; the body is provided with a mounting groove penetrating through the first surface, the mounting groove is arranged between two adjacent resonant cavities, and the mounting groove is used for bearing a resonant column. The filter provided by the utility model can be used in different frequency bands, and when the filter is used in a high-frequency product, a phenomenon that the far-end suppression capability is influenced by resonance peaks can be avoided.

Description

Technical Field

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

[0002] Currently, the filters that are widely used in microwave and RF applications are coaxial cavity filters. To improve the isolation suppression capability of transmitting TX and receiving RX of conventional cavity filters, it is necessary to use capacitive flying rods between the resonant rods.

[0003] The current flying rod structure is prone to produce resonant frequencies in high-frequency (greater than 3500MHZ) filter products, resulting in insufficient far-end suppression capability of the cavity filter. The resonant frequency peak often appears in the frequency range that the filter's low-pass filter cannot filter. Utility Model Content

[0004] In view of this, the purpose of the present invention is to overcome the deficiencies in the prior art and provide a filter and a filter module.

[0005] In a first aspect, the utility model provides a filter, comprising:

[0006] A body, wherein along a first direction, the body has a first surface and a second surface that are oppositely arranged, and the body is provided with a plurality of resonant cavities that penetrate through the first surface;

[0007] The body is provided with an air flow channel penetrating the first surface and the second surface, so as to separate two adjacent resonant cavities through the air flow channel;

[0008] The main body is provided with a mounting groove penetrating the first surface, the mounting groove is arranged between two adjacent resonant cavities, and the mounting groove is used to carry the resonant column.

[0009] In some embodiments, the plurality of resonant cavities include a plurality of first resonant cavities and a plurality of second resonant cavities;

[0010] Along the second direction, a plurality of the first resonant cavities are arranged at equal intervals, and a plurality of the second resonant cavities are arranged at equal intervals;

[0011] The second direction is perpendicular to the first direction.

[0012] In some embodiments, a distance between two adjacent first resonant cavities is equal to a distance between two adjacent second resonant cavities.

[0013] In some embodiments, the air flow channel is disposed between the first resonant cavity and the second resonant cavity.

[0014] In some embodiments, the distance from the central axis of the airflow channel to the axis of the first resonant cavity is equal to the distance from the central axis of the airflow channel to the axis of the second resonant cavity.

[0015] In some embodiments, the body is provided with a through hole penetrating the first surface and the second surface;

[0016] Along the second direction, the through hole is arranged at one end of the air flow channel, so that two adjacent resonant cavities are separated by the through hole.

[0017] In some embodiments, the airflow channel includes a first extension and a second extension;

[0018] The first extension portion is disposed on a side of the airflow channel facing the first resonant cavity, and the first extension portion is placed between two adjacent first resonant cavities;

[0019] The second extension portion is disposed on a side of the airflow channel facing the second resonant cavity, and the second extension portion is placed between two adjacent second resonant cavities.

[0020] In some embodiments, the mounting slot is cylindrical.

[0021] In some embodiments, the body is a ceramic plate.

[0022] In a second aspect, the utility model provides a filter module, comprising a connecting frame and the filter;

[0023] There are multiple filters, which are arranged at intervals and are all connected to the connecting frame.

[0024] The embodiments of the utility model have the following advantages: a plurality of resonant cavities penetrating the first surface are provided on the main body, the plurality of resonant cavities are arranged at intervals, and an air flow channel penetrating the first surface and the second surface is provided on the main body, so that two adjacent resonant cavities are separated by the air in the air flow channel, so that each resonant cavity is an independent cavity, so as to avoid series connection of two adjacent resonant cavities and interference between two adjacent resonant cavities, so as to ensure that when the gain provided by the stimulated radiation of each resonant cavity exceeds the loss, it is amplified in the resonant cavity, and self-excited oscillation is established and maintained.

[0025] By setting the installation groove between two adjacent resonant cavities, the resonant column set in the installation groove can form a flying rod, so that it can be used in different frequency bands, and when used in high-frequency products, it can avoid the generation of resonant peaks that affect the remote suppression capability.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic structural diagram of a filter provided by some embodiments of the present utility model from a viewing angle is shown;

[0029] Figure 2 A schematic structural diagram of a filter provided by some embodiments of the utility model from another perspective is shown;

[0030] Figure 3 A structural schematic diagram of a filter module provided by some embodiments of the present utility model from one viewing angle is shown;

[0031] Figure 4 A structural schematic diagram of a filter module provided by some embodiments of the present utility model from another perspective is shown.

[0032] Description of main component symbols:

[0033] 100-main body; 110-first surface; 120-second surface; 130-resonance cavity; 131-first resonance cavity; 132-second resonance cavity; 140-air flow channel; 141-first extension portion; 142-second extension portion; 150-installation groove; 160-through hole; 200-connecting frame. DETAILED DESCRIPTION

[0034] 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0036] 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.

[0037] 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the template herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0039] like Figure 1 As shown, some embodiments of the present invention provide a filter, which is mainly used in communications, semiconductors, etc., to improve the production efficiency of the filter, reduce production costs, and improve remote suppression capabilities.

[0040] The filter comprises a body 100 .

[0041] Along a first direction, the body 100 has a first surface 110 and a second surface 120 that are oppositely disposed, and the first surface 110 is parallel to the second surface 120 .

[0042] It should be noted that, in this embodiment, the filter is a plate-like structure, and the first direction refers to the thickness direction of the filter.

[0043] The main body 100 is provided with a plurality of resonant cavities 130 penetrating the first surface 110 . The plurality of resonant cavities 130 are arranged at intervals. The number of the resonant cavities 130 can be two or more of any numerical value and can be specifically set according to actual conditions.

[0044] The arrangement of the plurality of resonant cavities 130 on the body 100 includes any one of a linear arrangement, a zigzag arrangement, a curved arrangement, a matrix arrangement, a ring array, or a combination of two or more thereof, which can be specifically set according to actual conditions.

[0045] Specifically, the main body 100 is provided with an air flow channel 140 that passes through the first surface 110 and the second surface 120, so that the air in the air flow channel 140 can separate the two adjacent resonant cavities 130, so that each resonant cavity 130 is an independent cavity, so as to avoid two adjacent resonant cavities 130 being connected in series, thereby avoiding interference between the two adjacent resonant cavities 130, and ensuring that when the gain provided by the stimulated radiation of each resonant cavity 130 exceeds the loss, it can be amplified in the resonant cavity 130 and establish and maintain self-excited oscillation.

[0046] It should be noted that the resonant cavity 130 is a cavity in which a high-frequency electromagnetic field continuously oscillates. Since the electromagnetic field is completely concentrated in the cavity, there is no radiation loss, so it has a high quality factor. In the resonant cavity 130, the electromagnetic field can oscillate at a series of frequencies, and the frequency size is related to the shape, geometric dimensions and resonant wave mode of the resonant cavity 130.

[0047] In addition, the main body 100 is provided with a mounting groove 150 penetrating the first surface 110 , and the mounting groove 150 is disposed between two adjacent resonant cavities 130 .

[0048] It should be noted that, in some embodiments of the present invention, the mounting groove 150 is used to support the resonant column, so that the resonant column arranged in the mounting groove 150 can form a flying rod.

[0049] In some embodiments of the present invention, the installation groove 150 is cylindrical, and the diameter of the installation groove 150 can be specifically set according to actual conditions.

[0050] By setting the mounting groove 150 to be cylindrical, the position, height and size of the mounting groove 150 can be flexibly adjusted according to different frequency products.

[0051] It should be noted that the filter provided by the utility model can be used in different frequency bands, and when used in high-frequency products it can also avoid the generation of resonant peaks that affect the remote suppression capability, while reducing materials such as limit insulators and limit flying rods in existing filters, thereby reducing production costs and improving production efficiency.

[0052] like Figure 1 As shown, in some embodiments of the present invention, the plurality of resonant cavities 130 include a plurality of first resonant cavities 131 and a plurality of second resonant cavities 132 .

[0053] The shape of the first resonant cavity 131 is the same as that of the second resonant cavity 132 , and the size of the first resonant cavity 131 is the same as that of the second resonant cavity 132 .

[0054] Along the second direction, a plurality of the first resonant cavities 131 are arranged at equal intervals, and a plurality of the second resonant cavities 132 are arranged at equal intervals.

[0055] In addition, it should be noted that there is a gap between the first resonant cavity 131 and the second resonant cavity 132 , and the number of the first resonant cavity 131 is equal to the number of the second resonant cavity 132 .

[0056] Specifically, along the second direction, the plurality of first resonant cavities 131 and the plurality of second resonant cavities 132 are arranged in two rows, and the first resonant cavities 131 and the second resonant cavities 132 are arranged in a staggered manner, and the plane where the axes of the plurality of first resonant cavities 131 are located is parallel to the plane where the axes of the plurality of second resonant cavities 132 are located.

[0057] It should be noted that the second direction refers to the length direction of the body 100 , that is, the extension direction of the air flow channel 140 .

[0058] It can be understood that the second direction is perpendicular to the first direction.

[0059] Furthermore, in some embodiments of the present invention, the spacing between two adjacent first resonant cavities 131 is equal to the spacing between two adjacent second resonant cavities 132, so as to ensure that the filter can be used in different frequency bands. When used in high-frequency products, it can avoid the generation of resonant peaks that affect the remote suppression capability.

[0060] In some embodiments of the present invention, the distance from the central axis of the airflow channel 140 to the axis of the first resonant cavity 131 is equal to the distance from the central axis of the airflow channel 140 to the axis of the second resonant cavity 132, so as to ensure the uniformity of the distances from the first resonant cavity 131 and the second resonant cavity 132 to the axis of the airflow channel 140, thereby ensuring the uniformity of the blocking distance of the airflow channel 140 to the two adjacent first resonant cavities 131.

[0061] Furthermore, it is possible to ensure the uniformity of the blocking distance between the airflow channel 140 and the two adjacent second resonant cavities 132 and the uniformity of the blocking distance between the airflow channel 140 and the adjacent first resonant cavity 131 and the second resonant cavity 132 .

[0062] It can be understood that the airflow channel 140 arranged on the main body 100 can separate any two adjacent resonant cavities 130, and the distance between the central axis of the airflow channel 140 and the axis of each resonant cavity 130 is equal, so as to ensure the consistency of the barrier effect of the airflow channel 140 on each resonant cavity 130.

[0063] Specifically, in this embodiment, the air flow channel 140 is a zigzag structure.

[0064] like Figure 1 As shown, in some embodiments of the present invention, the airflow channel 140 is arranged between the plurality of the first resonant cavities 131 and the plurality of the second resonant cavities 132, so as to separate the first resonant cavities 131 from the second resonant cavities 132 through the airflow channel 140, and at the same time, two adjacent first resonant cavities 131 can be separated by the airflow channel 140, and two adjacent second resonant cavities 132 can also be separated by the airflow channel 140.

[0065] Specifically, the airflow channel 140 has a first extension portion 141 on one side facing the first resonant cavity 131 . The first extension portion 141 is located between two adjacent first resonant cavities 131 , so that the two adjacent first resonant cavities 131 are separated by the first extension portion 141 .

[0066] In addition, a side of the airflow channel 140 facing the second resonant cavity 132 has a second extending portion 142 . The second extending portion 142 is located between two adjacent second resonant cavities 132 , so that the two adjacent second resonant cavities 132 are separated by the second extending portion 142 .

[0067] It should be noted that both the first extension portion 141 and the second extension portion 142 penetrate the first surface 110 and the second surface 120 .

[0068] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the body 100 is provided with a through hole 160 penetrating the first surface 110 and the second surface 120 .

[0069] Along the second direction, the through holes 160 are spaced apart at one end of the airflow channel 140 so as to separate two adjacent resonant cavities 130 at the end of the airflow channel 140 through the through holes 160. Meanwhile, the size of the mounting slot 150 in the filter is adjusted by setting the through holes 160.

[0070] Specifically, the two first resonant cavities 131 disposed at the ends of the airflow channel 140 can be separated by the through hole 160 , and the first resonant cavity 131 and the second resonant cavity 132 disposed at the ends of the airflow channel 140 can also be separated by the through hole 160 .

[0071] like Figure 1 As shown, in some embodiments of the present invention, the mounting groove 150 is located between the airflow channel 140 and the through hole 160 to prevent the resonant cavity 130 on the side away from the through hole 160 and the resonant cavity 130 on the side away from the end of the airflow channel 140 from affecting the resonant column set in the mounting groove 150, so as to ensure that the resonant column and the resonant cavity 130 jointly generate a resonant frequency, thereby achieving the frequency required by the filter.

[0072] In some embodiments of the present invention, the body 100 is a ceramic plate, that is, the filter is a ceramic filter.

[0073] like Figure 3 and Figure 4 As shown, some embodiments of the present invention provide a filter module, which includes a connecting frame 200 and the filter described in any one of the above embodiments.

[0074] Specifically, there are multiple filters in the filter module, and the multiple filters are connected through a connecting frame 200. The multiple filters are arranged along the third direction on the connecting member, and two adjacent filters are symmetrically arranged.

[0075] There are two connecting frames 200 . Along the first direction, the two connecting frames 200 are respectively arranged at two opposite sides of the filter, and multiple filters are connected through the connecting frames 200 to form a filter module.

[0076] In this embodiment, the third direction refers to the width direction of the filter, wherein the third direction, the second direction and the first direction are perpendicular to each other.

[0077] It should be noted that the filter module has the structural characteristics of the filter and the beneficial effects produced by the filter, which will not be described one by one here.

[0078] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0079] 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.

[0080] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A filter, characterized in that: include: A body, wherein along a first direction, the body has a first surface and a second surface that are oppositely arranged, and the body is provided with a plurality of resonant cavities that penetrate through the first surface; The body is provided with an air flow channel penetrating the first surface and the second surface, so as to separate two adjacent resonant cavities through the air flow channel; The main body is provided with a mounting groove penetrating the first surface, the mounting groove is arranged between two adjacent resonant cavities, and the mounting groove is used to carry the resonant column.

2. The filter according to claim 1, characterized in that The plurality of resonant cavities include a plurality of first resonant cavities and a plurality of second resonant cavities; Along the second direction, a plurality of the first resonant cavities are arranged at equal intervals, and a plurality of the second resonant cavities are arranged at equal intervals; The second direction is perpendicular to the first direction.

3. The filter according to claim 2, characterized in that The distance between two adjacent first resonant cavities is equal to the distance between two adjacent second resonant cavities.

4. The filter according to claim 2, characterized in that The air flow channel is disposed between the first resonant cavity and the second resonant cavity.

5. The filter according to claim 4, characterized in that The distance from the central axis of the airflow channel to the axis of the first resonant cavity is equal to the distance from the central axis of the airflow channel to the axis of the second resonant cavity.

6. The filter according to claim 4, characterized in that The body is provided with a through hole penetrating the first surface and the second surface; Along the second direction, the through hole is arranged at one end of the air flow channel, so that two adjacent resonant cavities are separated by the through hole.

7. The filter according to claim 4, characterized in that The airflow channel includes a first extension portion and a second extension portion; The first extension portion is disposed on a side of the airflow channel facing the first resonant cavity, and the first extension portion is placed between two adjacent first resonant cavities; The second extension portion is disposed on a side of the airflow channel facing the second resonant cavity, and the second extension portion is placed between two adjacent second resonant cavities.

8. The filter according to any one of claims 1 to 7, characterized in that The mounting groove is cylindrical.

9. The filter according to claim 8, characterized in that The body is a ceramic plate.

10. A filter module, characterized in that: A connecting frame and a filter according to any one of claims 1 to 9; There are multiple filters, which are arranged at intervals and are all connected to the connecting frame.

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