A single resonance rod, resonance rod and radio frequency cavity filter

Abstract

The present invention relates to the technical field of filters, and discloses a monomer resonant rod, a resonant rod, and a radio frequency cavity filter. The monomer resonant rod is configured to be arranged in the inner cavity of the radio frequency cavity filter for resonant filtering. The monomer resonant rod is in a sheet-like structure, including: a rod body portion, which extends along a first direction, and one end of which is used to connect the inner cavity; a first connecting rod portion, which is fixedly connected to the other end of the rod body portion, and the first connecting rod portion extends along a second direction perpendicular to the first direction; a second connecting rod portion, which is fixedly connected to the first connecting rod portion, and along the first direction, the second connecting rod portion is located on a side of the first connecting rod portion away from the rod body portion; a third connecting rod portion, which is fixedly connected to the first connecting rod portion through at least one second connecting rod portion, and the third connecting rod portion at least includes a first extension section extending along the second direction, and along the first direction, the first extension section is fixedly connected to one end of the second connecting rod portion away from the first connecting rod portion. The monomer resonant rod occupies a small space, has good heat dissipation capacity, and has a good filtering effect.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, and in particular to a monomer resonant rod, a resonant rod and a radio frequency cavity filter. Background Art

[0002] RF cavity filters, also known as "RF interference filters", are mainly used in electronic devices working at high frequencies to filter and suppress useless frequency band signals, thereby leaving signals in useful frequency bands.

[0003] The existing RF cavity filter mainly includes a cavity, a cover plate covering the cavity, and a resonant component arranged in the cavity. The resonant component is mainly a columnar structure also called a resonant column. The RF signal is filtered by capacitive coupling between multiple resonant columns to obtain the desired frequency band. Most of the existing resonant columns are single columnar structures, which have a large space inside the cavity, are not convenient for the arrangement of the resonant column in the cavity, and have poor heat dissipation capabilities. Especially in the field of 5G communications, the application and filtering effect of this type of RF cavity filter are greatly limited.

[0004] Therefore, there is an urgent need to provide a single resonant rod, a resonant rod and a radio frequency cavity filter, wherein the single resonant rod and the resonant rod have the advantages of small space occupation, good heat dissipation capacity and good filtering effect. Summary of the invention

[0005] One object of the present invention is to provide a single-body resonant rod, which has the advantages of small space occupation, good heat dissipation capacity and good filtering effect.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A single resonant rod is configured to be arranged in an inner cavity of a radio frequency cavity filter for resonant filtering, wherein the single resonant rod is in a sheet-like structure and comprises:

[0008] A rod portion extending along a first direction, one end of the rod portion being used to connect to the inner cavity;

[0009] A first connecting rod portion, which is fixedly connected to the other end of the rod body portion, and the first connecting rod portion extends along a second direction perpendicular to the first direction;

[0010] a second connecting rod portion, which is fixedly connected to the first connecting rod portion, and along the first direction, the second connecting rod portion is located at a side of the first connecting rod portion away from the rod body portion;

[0011] The third link portion is fixedly connected to the first link portion through the second link portion, and the third link portion includes a first extension section extending along the second direction, and the first extension section is fixedly connected to an end of the second link portion away from the first link portion.

[0012] Optionally, there are two second connecting rod parts, the two second connecting rod parts are connected to the first connecting rod part along the second direction and are spaced apart from each other, and the third connecting rod part is fixedly connected to the first connecting rod part through one or two second connecting rod parts.

[0013] Optionally, along the second direction, one end of the first connecting rod portion extends out of one side of the rod body portion, and the other end extends out of the other side of the rod body portion.

[0014] Optionally, a plug-in block is protruding from the rod body, and the rod body is configured to be plugged into the inner cavity through the plug-in block.

[0015] Optionally, the second connecting rod portion extends along the first direction.

[0016] Optionally, it also includes:

[0017] The input and output ends are integrally extended from the rod body, and the input and output ends are configured to connect to an external circuit.

[0018] Optionally, the third connecting rod portion further includes a second extending section extending along the first direction, and the second extending section is fixedly connected to an end of the first extending section away from the second connecting rod portion.

[0019] Optionally, the third connecting rod portion further includes a third extending section extending along the second direction, and the third extending section is fixedly connected to an end of the second extending section away from the first extending section.

[0020] Another object of the present invention is to provide a resonant rod, which has the advantages of occupying a small space, having good heat dissipation capacity and good filtering effect.

[0021] To achieve this object, the present invention adopts the following technical solutions:

[0022] A resonant rod comprises a plurality of single-unit resonant rods as described above, wherein the plurality of single-unit resonant rods are arranged side by side and spaced apart along the second direction, and the rod bodies of the plurality of single-unit resonant rods are connected by coupling connecting rods, and the plurality of single-unit resonant rods and the coupling connecting rods are an integrally formed metal sheet structure.

[0023] Another object of the present invention is to provide a radio frequency cavity filter, wherein the resonant rod has the advantages of occupying a small space, having good heat dissipation capacity and good filtering effect.

[0024] To achieve this object, the present invention adopts the following technical solutions:

[0025] A radio frequency cavity filter, wherein a plurality of resonant rods as described above are arranged in an inner cavity of the radio frequency cavity filter, the plurality of resonant rods are arranged at intervals from each other, and the first extension sections of the plurality of resonant rods are arranged at intervals from the side wall of the inner cavity.

[0026] Beneficial effects of the present invention:

[0027] Compared with the existing resonant columns, the monomer resonant rod of the present invention has a sheet-like structure, occupies a small space and has good heat dissipation capacity. The rod body of the monomer resonant rod extends along a first direction, and one end of the rod body is used to be fixedly connected to the inner cavity; the first connecting rod is fixedly connected to the other end of the rod body, and the first connecting rod extends along a second direction perpendicular to the first direction; the second connecting rod is fixedly connected to the first connecting rod, and along the first direction, the second connecting rod is located on the side of the first connecting rod away from the rod body; the third connecting rod is fixedly connected to the first connecting rod through at least one second connecting rod, and the third connecting rod includes at least a first extension section extending along the second direction, and along the first direction, the first extension section is located at one end of the third connecting rod away from the second connecting rod. When the monomer resonant rod is arranged in the inner cavity of the radio frequency cavity filter, the first extension section is kept spaced apart from the side wall of the inner cavity, thereby being able to generate capacitive coupling, and the monomer resonant rod constructed with this structure can have a good filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the resonant rod in the first embodiment provided by the present invention;

[0029] Figure 2 is a schematic structural diagram of a radio frequency cavity filter in Embodiment 1 provided by the present invention;

[0030] Figure 3 It is a structural schematic diagram of the radio frequency cavity filter in the first embodiment provided by the present invention without the cover plate;

[0031] Figure 4 is a cross-sectional view of the radio frequency cavity filter in the first embodiment provided by the present invention;

[0032] Figure 5 is a schematic structural diagram of a resonant rod in the second embodiment provided by the present invention;

[0033] Figure 6 is a schematic structural diagram of a resonant rod in Embodiment 3 provided by the present invention;

[0034] Figure 7 is a schematic structural diagram of a resonant rod in a fourth embodiment of the present invention;

[0035] Figure 8It is a schematic diagram of the structure of the resonant rod in the fifth embodiment provided by the present invention.

[0036] In the figure:

[0037] X, first direction; Y, second direction;

[0038] 1. Rod body; 11. Plug-in block; 2. First connecting rod; 3. Second connecting rod; 4. Third connecting rod; 41. First extension section; 42. Second extension section; 43. Third extension section; 5. Input and output ends; 6. Coupling connecting rod; 7. Shell; 8. Cover plate; 9. Partition plate. DETAILED DESCRIPTION

[0039] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] Embodiment 1

[0044] like Figure 1-4 As shown, this embodiment provides a monomer resonant rod, a resonant rod including a plurality of such monomer resonant rods, and a radio frequency cavity filter in which the resonant rod is arranged in an inner cavity, and both the monomer resonant rod and the resonant rod are used for resonant filtering. In the figure, X represents the first direction, and Y represents the second direction. In some embodiments, at least two monomer resonant rods are arranged side by side and spaced apart along the second direction, and the rod body portions 1 of two adjacent monomer resonant rods are connected by a coupling connecting rod 6. In some embodiments, a plurality of such resonant rods are arranged in the inner cavity of the radio frequency cavity filter, and the plurality of such resonant rods are spaced apart from each other. The resonant rod in this embodiment specifically includes four monomer resonant rods, and the plurality of monomer resonant rods of each resonant rod and the coupling connecting rod 6 between two adjacent monomer resonant rods are an integrally formed metal sheet structure, which has a single structure, low manufacturing cost, and good heat dissipation performance. In other embodiments, it may also be a molded structure integrally formed by injection molding and coated with a metal layer on the surface.

[0045] like Figure 1 As shown, the single resonant rod in the resonant rod is a sheet-like structure, and the single resonant rod includes a rod body 1, a first connecting rod 2, a second connecting rod 3 and a third connecting rod 4, and the rod body 1, the first connecting rod 2, the second connecting rod 3 and the third connecting rod 4 are all flat. The rod body 1 extends along a first direction, and one end of the rod body 1 is used to connect the inner cavity; the first connecting rod 2 is fixedly connected to the other end of the rod body 1, and the first connecting rod 2 extends along a second direction perpendicular to the first direction; the second connecting rod 3 is fixedly connected to the first connecting rod 2, and along the first direction, the second connecting rod 3 is located on the side of the first connecting rod 2 away from the rod body 1; in some embodiments, the second connecting rod 3 extends along the first direction. The third connecting rod portion 4 is fixedly connected to the first connecting rod portion 2 through at least one second connecting rod portion 3 (in this embodiment, the third connecting rod portion 4 is fixedly connected to the first connecting rod portion 2 through one second connecting rod portion 3), and the third connecting rod portion 4 at least includes a first extension section 41 extending along the second direction, and along the first direction, the first extension section 41 is fixedly connected to an end of the second connecting rod portion 3 away from the first connecting rod portion 2. When the resonant rod is disposed in the inner cavity of the RF cavity filter provided in this embodiment, the first extension section 41 of the resonant rod is spaced apart from the side wall of the inner cavity. Compared with the existing resonant columns, the single resonant rod and the resonant rod of the present embodiment have a sheet-like structure, occupy a small space and have good heat dissipation capacity. The first connecting rod portion 2, the second connecting rod portion 3 and the third connecting rod portion 4 located above the rod body portion 1 cooperate to constitute the main body portion of the single resonant rod and the resonant rod for resonance. Through the extension and spacing arrangement of the first connecting rod portion 2, the second connecting rod portion 3 and the third connecting rod portion 4 in different directions, as well as the spacing and arrangement of the first connecting rod portion 2, the second connecting rod portion 3 and the third connecting rod portion 4 relative to the side walls of the inner cavity in different directions, a good filtering effect can be achieved in a relatively compact space, and it can also have better heat dissipation capacity, smaller volume and lighter weight.

[0046] Furthermore, if Figure 1-4 As shown, in this embodiment, a plug-in block 11 is protruding from the rod body 1, and the rod body 1 can be plugged into the inner cavity through the plug-in block 11, thereby achieving position fixation, and its structure is simple, the design cost is low, and it is easy to plug in. In some embodiments, the rod body 1 does not need to be plugged in through the plug-in block 11, but is directly welded to the side wall of the inner cavity.

[0047] In addition, in this embodiment, one of the four single resonant rods of the resonant rod further includes an input / output terminal 5. The input / output terminal 5 is fixedly connected to the rod body 1, and the input / output terminal 5 is configured to connect to an external circuit (not shown in the figure). In some embodiments, the input / output terminal 5 is integrally extended from the rod body 1. Figure 3-4 As shown, the RF cavity filter also includes a shell 7 and a cover plate 8, which together form an outer shell of the RF cavity filter. The bottom plate and the side plate of the shell 7 together form an inner cavity. The cover plate 8 is covered on one end of the side plate of the shell 7 away from the bottom plate, and multiple plug-in blocks 11 of multiple rod body parts 1 of the resonant rod are inserted into the bottom plate of the shell 7. The first connecting rod part 2, the second connecting rod part 3 and the third connecting rod part 4 of each monomer resonant rod are away from the bottom plate of the shell 7 relative to the rod body part 1, and the first connecting rod part 2, the second connecting rod part 3 and the third connecting rod part 4 of each monomer resonant rod are close to the cover plate 8 relative to the rod body part 1, and the first extension section 41 of the third connecting rod part 4 of each monomer resonant rod is spaced apart from the side wall of the inner cavity (such as the inner wall of the bottom plate and the side plate of the shell 7 and the inner wall of the cover plate 8). The partition 9 in the shell 7 divides the inner cavity into two chambers, and a resonant rod is fixedly inserted in each of the two chambers. Each resonant rod has an input and output end 5, one of the two input and output ends 5 can be used as an input end, and the other can be used as an output end, thereby forming a radio frequency cavity filter with filtering function. The entire radio frequency cavity filter completely adopts a resonant rod with a specific structure, so that the radio frequency cavity filter can be optimized in the direction of miniaturization, which is suitable for 5G communication equipment.

[0048] Embodiment 2

[0049] like Figure 5As shown, the difference between this embodiment and the first embodiment is that this embodiment provides a monomer resonant rod of another structure and a resonant rod having the monomer resonant rod of this embodiment. The resonant rod includes three monomer resonant rods, and two adjacent monomer resonant rods are also connected by a coupling link 6, thereby forming an integrated structure of the resonant rod. The difference between the monomer resonant rod of this embodiment and the first embodiment is that it includes two second link parts 3, and the two second link parts 3 are connected to the first link part 2 at intervals along the second direction, and the third link part 4 is fixedly connected to the first link part 2 through the two second link parts 3. The first extension section 41 of the third link part 4 is a long flat rod structure extending along the second direction, and the two ends of the first extension section 41 along the second direction are respectively connected to the two second link parts 3. In some embodiments, the two second link parts 3 are connected to the opposite ends of the first link part 2 along the second direction, and then the first link part 2, the two second link parts 3 and the third link part 4 cooperate to form a "mouth"-shaped main structure for resonance. For example, as Figure 5 As shown, in this embodiment, along the second direction, one end of the first connecting rod portion 2 extends out of one side of the rod body portion 1, and the other end of the first connecting rod portion 2 extends out of the other side of the rod body portion 1. After optimization test, among many different forms of resonant rod structures, the resonant rod of this embodiment has a good filtering effect, and is particularly suitable for 5G communication equipment.

[0050] Embodiment 3

[0051] like Figure 6 As shown, the difference between this embodiment and the second embodiment is that this embodiment provides a single resonance rod of another structure and a resonance rod having the single resonance rod of this embodiment. The difference between the single resonance rod of this embodiment and the second embodiment is that only one end of the two ends of the third connecting rod part 4 along the second direction is connected to one of the second connecting rod parts 3, and one end of the first extension section 41 along the second direction is connected to one of the second connecting rod parts 3, thereby forming a single resonance rod having another structure. Figure 6 The "mouth"-shaped structure with a notch is shown, and the notch is located on the side of the first connecting rod portion 2 facing away from the rod body portion 1. Similarly, after experimental testing, it also has a good filtering effect, and is particularly suitable for 5G communication equipment.

[0052] Embodiment 4

[0053] like Figure 7 As shown, the difference between this embodiment and the first embodiment is that this embodiment provides a single resonance rod of another structure and a resonance rod having the single resonance rod of this embodiment. The resonance rod includes three single resonance rods, and two adjacent single resonance rods are also connected by a coupling connecting rod 6, thereby forming an integrated structure of the resonance rod. For example, Figure 7As shown, in this embodiment, along the second direction, one end of the first connecting rod portion 2 extends out of one side of the rod body portion 1, and the other end of the first connecting rod portion 2 extends out of the other side of the rod body portion 1. The third connecting rod portion 4 is an "L"-shaped structure rotated 90 degrees to the right, and the third connecting rod portion 4 includes a first extension segment 41 extending along the second direction and a second extension segment 42 extending along the first direction. The second extension segment 42 is fixedly connected to one end of the first extension segment 41 away from the second connecting rod portion 3. The second extension segment 42 and the first extension segment 41 constitute an "L"-shaped structure rotated 90 degrees to the right, and the first connecting rod portion 2, the second connecting rod portion 3 and the third connecting rod portion 4 cooperate to form a "mouth"-shaped structure with a notch, and the notch is located on one side of the first connecting rod portion 2 along the first direction. Similarly, after testing, it also has a good filtering effect, especially suitable for 5G communication equipment.

[0054] Embodiment 5

[0055] like Figure 8 As shown, the difference between this embodiment and the first embodiment is that this embodiment provides a single-unit resonant rod of another structure and a resonant rod having the single-unit resonant rod of this embodiment. The resonant rod includes three single-unit resonant rods, and two adjacent single-unit resonant rods are also connected by a coupling connecting rod 6, thereby forming an integrated structure of the resonant rod. More specifically, as shown in FIG. Figure 8 As shown, in this embodiment, along the second direction, one end of the first connecting rod 2 extends out of one side of the rod body 1, and the other end of the first connecting rod 2 extends out of the other side of the rod body 1, the second connecting rod 3 is connected to one end of the first connecting rod 2 along the second direction, and the third connecting rod 4 is a "U"-shaped structure rotated 90 degrees to the right. For example, the third connecting rod 4 includes a first extension section 41 extending along the second direction, a second extension section 42 extending along the first direction, and a third extension section 43 extending along the second direction, the second extension section 42 is fixedly connected to one end of the first extension section 41 away from the second connecting rod 3, the third extension section 43 is fixedly connected to one end of the second extension section 42 away from the first extension section 41, the third connecting rod 4 is integrally connected to one end of the second connecting rod 3 away from the first connecting rod 2, and the first connecting rod 2, the second connecting rod 3 and the third connecting rod 4 cooperate to form an "S"-shaped structure, and similarly, after experimental testing, it also has a good filtering effect.

[0056] In summary, embodiments 1 to 5 of the present invention provide five resonant rods and single resonant rods with different structures, all of which optimize and adjust the structures and connection relationships of the first connecting rod portion 2 , the second connecting rod portion 3 and the third connecting rod portion 4 . The rod body portion 1 extends along a first direction, and one end of the rod body portion 1 is used to fix the inner cavity; the first connecting rod portion 2 is fixedly connected to the other end of the rod body portion 1, and the first connecting rod portion 2 extends along a second direction perpendicular to the first direction; the second connecting rod portion 3 is fixedly connected to the first connecting rod portion 2, and along the first direction, the second connecting rod portion 3 is located on the side of the first connecting rod portion 2 away from the rod body portion 1; the third connecting rod portion 4 is fixedly connected to the first connecting rod portion 2 through at least one second connecting rod portion 3, and the third connecting rod portion 4 at least includes a first extension section 41 extending along the second direction, and along the first direction, the first extension section 41 is located at one end of the third connecting rod portion 4 away from the second connecting rod portion 3, and the first connecting rod portion 2, the second connecting rod portion 3 and the third connecting rod portion 4 form a main structure for resonance, and the single resonant rod and the resonant rod can obtain good filtering effect, which is particularly suitable for 5G communication equipment.

[0057] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A single resonant rod, configured to be arranged in an inner cavity of a radio frequency cavity filter for resonant filtering, characterized in that: The monomer resonant rod is in a sheet-like structure, and the monomer resonant rod comprises: A rod body portion (1) extending along a first direction, one end of the rod body portion (1) being used to connect to the inner cavity; A first connecting rod portion (2) which is fixedly connected to the other end of the rod body portion (1), and the first connecting rod portion (2) extends along a second direction perpendicular to the first direction; A second connecting rod portion (3) is fixedly connected to the first connecting rod portion (2), and along the first direction, the second connecting rod portion (3) is located on a side of the first connecting rod portion (2) away from the rod body portion (1); a third connecting rod portion (4) which is fixedly connected to the first connecting rod portion (2) via the second connecting rod portion (3), the third connecting rod portion (4) comprising a first extension section (41) extending along the second direction, the first extension section (41) being fixedly connected to an end of the second connecting rod portion (3) away from the first connecting rod portion (2); Along the second direction, one end of the first connecting rod portion (2) extends out of one side of the rod body portion (1), and the other end extends out of the other side of the rod body portion (1).

2. The single resonance rod according to claim 1, characterized in that: There are two second connecting rod parts (3), and the two second connecting rod parts (3) are connected to the first connecting rod part (2) at a distance from each other along the second direction. The third connecting rod part (4) is fixedly connected to the first connecting rod part (2) through one or two second connecting rod parts (3).

3. The single resonance rod according to claim 1, characterized in that: A plug-in block (11) is protrudingly provided on the rod body (1), and the rod body (1) is configured to be plugged into the inner cavity through the plug-in block (11).

4. The single resonance rod according to claim 1, characterized in that: The second connecting rod portion (3) extends along the first direction.

5. The single resonance rod according to claim 1, characterized in that: Also includes: An input / output terminal (5) integrally extends from the rod body (1), and the input / output terminal (5) is configured to be connected to an external circuit.

6. The single resonance rod according to claim 1, characterized in that: The third connecting rod portion (4) further comprises a second extension section (42) extending along the first direction, and the second extension section (42) is fixedly connected to an end of the first extension section (41) away from the second connecting rod portion (3).

7. The single resonance rod according to claim 6, characterized in that: The third connecting rod portion (4) further comprises a third extension section (43) extending along the second direction, and the third extension section (43) is fixedly connected to an end of the second extension section (42) away from the first extension section (41).

8. A resonant rod, characterized in that: It comprises a plurality of monomer resonant rods as described in any one of claims 1 to 7, wherein the plurality of monomer resonant rods are arranged side by side and spaced apart along the second direction, and the rod body portions (1) of the plurality of monomer resonant rods are connected by a coupling connecting rod (6), and the plurality of monomer resonant rods and the coupling connecting rod (6) are an integrally formed metal sheet structure.

9. A radio frequency cavity filter, characterized in that: A plurality of resonant rods as claimed in claim 8 are arranged in the inner cavity of the radio frequency cavity filter, the plurality of resonant rods are arranged at intervals from each other, and the first extension sections (41) of the plurality of resonant rods are arranged at intervals from the side wall of the inner cavity.

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