A capacitive coupling structure and a filter

Abstract

The utility model discloses a kind of capacitive coupling structure and filter, the capacitive coupling structure includes metal flybar sheet, at least one insulating connecting piece is fixed on the metal flybar sheet, one end of the insulating connecting piece is connected with metal flybar sheet, the other end of the insulating connecting piece extends to form extension outward, fixed hole is equipped on the extension of the insulating connecting piece, the metal flybar sheet is connected with cavity by metal screw passing through the fixed hole.The utility model adopts metal screw to pass through the fixed hole of insulating connecting piece, insulating connecting piece and cavity are fixedly connected, connection is more firm and reliable, and it will not be loose by stress influence.Even in the case of high power, metal screw will not be melted, deformed due to high temperature, and the fixed mode of using metal screw is firm and reliable, and can withstand high-power environmental test.

Description

Technical Field

[0001] This utility model belongs to the field of communication technology, specifically relating to a capacitive coupling structure and filter. Background Technology

[0002] The disclosed technology features a metal fly rod with mounting holes and a cavity with a step containing threaded holes. Plastic screws are used to fix the metal fly rod and insulating gasket to the step with threaded holes, achieving capacitive coupling. However, under high power conditions, the plastic screws are prone to melting and deformation due to high temperatures, causing the metal fly rod to loosen and leading to filter performance failure. Utility Model Content

[0003] The purpose of this invention is to overcome at least one defect in the prior art and to provide a capacitive coupling structure and filter.

[0004] In a first aspect, this utility model provides a capacitive coupling structure, including a metal fly rod plate, on which at least one insulating connector is fixed. One end of the insulating connector is connected to the metal fly rod plate, and the other end of the insulating connector extends outward to form an extension portion. A fixing hole is provided on the extension portion of the insulating connector, and the metal fly rod plate is connected to the cavity by a screw passing through the fixing hole.

[0005] Furthermore, the screw is a metal screw.

[0006] Furthermore, the insulating connector is integrally molded onto the metal fly rod plate via injection molding;

[0007] Alternatively, the insulating connector may be snapped into place with the metal fly rod plate;

[0008] Alternatively, the insulating connector is bonded to the metal fly rod plate;

[0009] Alternatively, the insulating connector is connected to the metal fly rod plate by screws.

[0010] Furthermore, the metal flying rod plate is provided with a curved portion, and a clearance space is formed on the inner side of the curved portion for making way for the resonant rod.

[0011] Furthermore, the bent portion is located in the middle of the metal fly rod plate;

[0012] or / and,

[0013] The curved section is an arc-shaped curved section.

[0014] Furthermore, two insulating connectors are fixed on the metal flying rod plate, and the two insulating connectors are located at both ends of the metal flying rod plate respectively.

[0015] Secondly, this utility model provides a filter, including a cavity, on which a capacitive coupling structure as described in the first aspect is fixed.

[0016] Furthermore, the cavity includes a straight-line cavity composed of at least two resonant cavities arranged in a straight line, and the capacitive coupling structure is provided between at least one pair of resonant cavities.

[0017] Furthermore, the cavity includes a straight-line cavity composed of at least three resonant cavities arranged in a straight line, and at least one pair of non-adjacent resonant cavities are provided with the capacitive coupling structure. The resonant cavity located in the middle of the pair of non-adjacent resonant cavities has a resonant rod inside, and the resonant rod is at least partially located in the clearance space inside the curved portion of the metal fly rod plate.

[0018] Furthermore, the cavity is provided with at least one set of threaded holes for connecting metal fly rods, with one set of threaded holes corresponding to one metal fly rod. The number of threaded holes in each set is the same as the number of insulating connectors on each metal fly rod. At least one metal screw passes through the fixing hole of the insulating connector on the metal fly rod and connects to the corresponding threaded hole.

[0019] This invention has at least the following advantages: Instead of fixing holes on the metal fly rod, an insulating connector is fixed to the metal fly rod, and the fixing holes are located on the outward extension of the insulating connector. This allows metal screws to pass through the fixing holes of the insulating connector to securely connect the insulating connector to the cavity, resulting in a more robust and reliable connection that will not loosen due to stress. Even under high power conditions, the metal screws will not melt or deform due to high temperatures. The metal screw fixing method is robust and reliable and can withstand high-power environmental testing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a capacitive coupling structure provided by this utility model;

[0022] Figure 2 A partial schematic diagram of a filter provided in one embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of a multiplexer topology composed of filters, provided as an embodiment of the present invention.

[0024] In the attached diagram, 1 is a metal flying rod plate, 11 is a bent part, 12 is a clearance space, 2 is an insulating connector, 21 is a fixing hole, 3 is a metal screw, 4 is a cavity, and 5 is a resonant rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "a plurality of" or "several" means two or more.

[0028] In order to effectively improve or even completely solve the above-mentioned problems in the related technologies, this disclosure provides corresponding solutions.

[0029] Figure 1 This is a schematic diagram of a capacitive coupling structure provided in an embodiment of this disclosure. Figure 1 As shown, the capacitive coupling structure includes a metal fly rod plate 1, on which at least one insulating connector 2 is fixed. One end of the insulating connector 2 is connected to the metal fly rod plate 1, and the other end of the insulating connector 2 extends outward to form an extension portion. The extension portion of the insulating connector 2 is provided with a fixing hole 21, and the metal fly rod plate 1 is connected to the cavity by a screw passing through the fixing hole 21.

[0030] The metal fly rod 1 of this invention does not have a fixing hole 21. Instead, an insulating connector 2 is fixed to the metal fly rod 1, and the fixing hole 21 is set on the outward extension of the insulating connector 2. In this way, a metal screw can be passed through the fixing hole 21 of the insulating connector 2 to fix the insulating connector 2 to the cavity. The connection is more secure and reliable, and will not loosen due to stress. Even under high power conditions, the metal screw will not melt or deform due to high temperature. The fixing method using metal screws is secure and reliable, and can withstand high-power environmental testing.

[0031] In some embodiments, the screw is a metal screw 3. Using a metal screw is preferred; however, this invention is not limited to metal screws and heat-resistant non-metallic screws can also be used.

[0032] The number of insulating connectors 2 can be one or more, depending on the needs. There are no special requirements for the connection position between the insulating connector 2 and the metal flying rod plate 1, which can also be set according to the needs.

[0033] In some embodiments, two insulating connectors 2 are fixed on the metal fly rod 1, and the two insulating connectors 2 are respectively located at both ends of the metal fly rod 1.

[0034] One end of the insulating connector 2 is a flying rod connection part, which is connected to the metal flying rod piece 1, and the other end of the insulating connector 2 is a cavity connection part, which is connected to the cavity.

[0035] In some embodiments, the insulating connector 2 is made of plastic and is integrally injection molded onto the metal fly rod plate 1. The fly rod connection portion of the insulating connector 2 covers a portion of the metal fly rod plate 1.

[0036] The connection method between the insulating connector 2 and the metal flying rod plate 1 is a preferred solution. However, the connection method between the insulating connector 2 and the metal flying rod plate 1 is not limited to the above embodiment. The insulating connector 2 and the metal flying rod plate 1 can also be connected by snap-fit, adhesive (such as adhesive with insulating glue) or screw connection.

[0037] The shape of the metal fly rod plate can be set as needed. In some embodiments, the metal fly rod plate 1 is provided with a curved portion 11, and a clearance space 12 for making way for the resonant rod is formed on the inner side of the curved portion 11.

[0038] Of course, if there is no need to make way, the metal fly rod plate 1 does not need to be bent.

[0039] In some embodiments, the bent portion 11 is located in the middle of the metal fly stick 1.

[0040] In some embodiments, the curved portion 11 is an arc-shaped curved portion 11.

[0041] Based on the same inventive concept, see [link to inventive concept] Figure 2 This disclosure also provides a filter, which includes a cavity 4 on which a capacitive coupling structure as described in any of the above embodiments is fixed to achieve capacitive coupling between two resonant cavities (a first resonant cavity and a second resonant cavity). A description of this capacitive coupling structure can be found in the previous embodiments and will not be repeated here.

[0042] In some embodiments, the cavity includes a straight-line cavity consisting of at least two resonant cavities arranged in a straight line, and the capacitive coupling structure is provided between at least one pair of resonant cavities.

[0043] Of course, the application of the capacitive coupling structure of this invention is not limited to straight-line cavities; it can be used in any scenario where capacitive coupling is achieved using a fly rod. The capacitive coupling structure can be positioned between non-adjacent resonant cavities or between adjacent resonant cavities.

[0044] In some embodiments, see Figure 2 The cavity 4 includes a straight-line cavity composed of at least three resonant cavities 41 arranged in a straight line, wherein at least one pair of non-adjacent resonant cavities in the straight-line cavity is provided with the capacitive coupling structure. A resonant rod 5 is located inside the resonant cavity between the pairs of non-adjacent resonant cavities, and the resonant rod 5 is at least partially located in the clearance space inside the curved portion of the metal fly rod plate 1.

[0045] In some embodiments, a resonant rod 5 is installed inside the resonant cavity 41. The pair of non-adjacent resonant cavities are a first resonant cavity and a second resonant cavity, with a third resonant cavity located between them. A first resonant rod is installed inside the first resonant cavity, a second resonant rod is installed inside the second resonant cavity, and a third resonant rod is installed inside the third resonant cavity. A curved portion 11 is provided on the metal fly rod 1 corresponding to the position of the third resonant rod, serving to allow space for the third resonant rod, such that the curved portion 11 of the metal fly rod 1 is located outside the third resonant rod, meaning that the third resonant rod is at least partially located within the clearance space 12 inside the curved portion 11 of the metal fly rod 1.

[0046] In some embodiments, the cavity is provided with at least one set of threaded holes for connecting the metal fly rod 1. One metal fly rod 1 corresponds to one set of threaded holes. The number of threaded holes in each set is the same as the number of insulating connectors on each metal fly rod. At least one metal screw 3 passes through the fixing hole 21 of the insulating connector 2 on the metal fly rod 1 and connects to the corresponding threaded hole. Each set of threaded holes includes at least one threaded hole, and the position of the threaded hole is set as needed, corresponding to the fixing hole 21 on the insulating connector 2 of the metal fly rod 1.

[0047] In some embodiments, see Figure 2 Two insulating connectors 2 are provided on the metal fly rod plate 1. Two metal screws 3 pass through the fixing holes 21 of the two insulating connectors 2 on the metal fly rod plate 1 and are connected to the two threaded holes on the cavity 4. The two insulating connectors 2 support the metal fly rod plate 1, so that the metal fly rod plate 1 is suspended between two non-adjacent resonant cavities (such as between two non-adjacent resonant cavities in a straight cavity), thereby realizing capacitive coupling between two non-adjacent resonant cavities.

[0048] The filter described above can be used in multiplexers or combiners, etc.

[0049] See Figure 3 This disclosure also provides a multiplexer, composed of multiple filters from any of the above embodiments, each filter allowing only signals of a specific frequency to pass through. The antenna (ANT) uses this combination of filters to multiplex transmitted and received signals, while ensuring independent transmission of multi-band signals without interference. The multiplexer is used to multiplex multi-band signals on the same antenna (ANT), while separating transmitted (TX) and received (RX) signals to avoid mutual interference.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A capacitive coupling structure, characterized in that: The device includes a metal fly stick, on which at least one insulating connector is fixed. One end of the insulating connector is connected to the metal fly stick, and the other end of the insulating connector extends outward to form an extension. The extension of the insulating connector has a fixing hole, and the metal fly stick is connected to the cavity by a screw passing through the fixing hole.

2. The capacitive coupling structure as described in claim 1, characterized in that: The screw is a metal screw.

3. The capacitive coupling structure as described in claim 1, characterized in that: The insulating connector is integrally molded onto the metal fly rod plate by injection molding. Alternatively, the insulating connector may be snapped into place with the metal fly rod plate; Alternatively, the insulating connector is bonded to the metal fly rod plate; Alternatively, the insulating connector is connected to the metal fly rod plate by screws.

4. The capacitive coupling structure as described in claim 1, characterized in that: The metal flying rod plate has a curved portion, and a clearance space is formed on the inner side of the curved portion to make way for the resonant rod.

5. The capacitive coupling structure as described in claim 4, characterized in that: The curved section is located in the middle of the metal fly rod plate; or / and, The curved section is an arc-shaped curved section.

6. The capacitive coupling structure as described in claim 1 or 5, characterized in that: Two insulating connectors are fixed on the metal flying rod plate, and the two insulating connectors are located at both ends of the metal flying rod plate respectively.

7. A filter, comprising a cavity, characterized in that: The cavity is fixed with a capacitive coupling structure as described in any one of claims 1 to 6.

8. The filter as described in claim 7, characterized in that: The cavity includes a straight-line cavity consisting of at least two resonant cavities arranged in a straight line, and the capacitive coupling structure is provided between at least one pair of resonant cavities.

9. The filter as described in claim 7, characterized in that: The cavity includes a straight-line cavity consisting of at least three resonant cavities arranged in a straight line. At least one pair of non-adjacent resonant cavities are provided with the capacitive coupling structure. The resonant cavity located in the middle of the pair of non-adjacent resonant cavities has a resonant rod inside. The resonant rod is at least partially located in the clearance space inside the bend of the metal fly rod plate.

10. The filter as described in claim 7, 8, or 9, characterized in that: The cavity is provided with at least one set of threaded holes for connecting metal fly rods. One metal fly rod corresponds to one set of threaded holes. The number of threaded holes in each set is the same as the number of insulating connectors on each metal fly rod. At least one metal screw passes through the fixing hole of the insulating connector on the metal fly rod and connects to the corresponding threaded hole.

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