CN216214010U

CN216214010U - Coupler and filter

Info

Publication number: CN216214010U
Application number: CN202122446461.XU
Authority: CN
Inventors: 周峰
Original assignee: Anhui Tatfook Technology Co Ltd
Current assignee: Anhui Tatfook Technology Co Ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-04-05
Anticipated expiration: 2031-10-11

Abstract

The application discloses a coupler and a filter, wherein the coupler comprises a coupling main rod, a cavity and a printed circuit board, a main rod hole is formed in the cavity, the coupling main rod is arranged in the main rod hole, a coupling window is formed in the side wall of the cavity, and the coupling main rod is exposed from the coupling window; the PCB is arranged at one side of the cavity far away from the coupling main rod corresponding to the position of the coupling window, the coupling main rod is provided with a widened part corresponding to the position of the coupling window, the radial width of the widened part is greater than that of the coupling main rod, and a gap is formed between the widened part and the PCB. This application is through above mode, and the coupling mobile jib is widened partially, makes the coupling mobile jib be closer to printed circuit board, strengthens the coupling effect.

Description

Coupler and filter

Technical Field

The application relates to the technical field of filters, in particular to a coupler and a filter.

Background

In order to enhance the coupling effect of the coupler, the coupling amount is maximized when the window is completely formed on the side wall of the cavity of the filter. However, in general, in actual production, the coupling window is not desired to be opened to the limit, because unnecessary coupling may be introduced, and this may not necessarily satisfy the coupling requirement, and may cause inconvenience in actual debugging and may cause trouble in size. In addition, due to the limitation of the structural space in the cavity of the filter, if the coupling main rod of the coupler is made large as a whole, inconvenience may be brought to the layout of the cavity, and the performance of the filter may be reduced.

Therefore, how to enhance the coupling effect between the coupling main rod and the printed circuit board in the limited space of the filter becomes a problem to be solved in the field.

SUMMERY OF THE UTILITY MODEL

The present application provides a coupler and a filter, which can enhance the coupling effect by locally widening the coupling main rod to make the coupling main rod closer to the printed circuit board.

The application discloses a coupler, which comprises a coupling main rod, a cavity and a printed circuit board, wherein a main rod hole is formed in the cavity, the coupling main rod is arranged in the main rod hole, a coupling window is formed in the side wall of the cavity, and the coupling main rod is exposed from the coupling window; the PCB is arranged at one side of the cavity far away from the coupling main rod corresponding to the position of the coupling window, the coupling main rod is provided with a widened part corresponding to the position of the coupling window, the radial width of the widened part is greater than that of the coupling main rod, and a gap is formed between the widened part and the PCB.

Optionally, the widened portion is a position of the coupling main rod corresponding to the coupling window, and is formed to protrude around a center line of the coupling main rod, which is circumferentially away from the coupling main rod, and the main rod hole is not in contact with the widened portion.

Optionally, the main rod hole is far away from the side wall of the coupling window, an avoiding groove is arranged at a position corresponding to the widened portion, the avoiding groove is formed by inwards recessing the inner wall of the main rod hole in a direction far away from the widened portion, and the length of the avoiding groove is greater than that of the widened portion.

Optionally, the radial width of the widened portion is greater than or equal to the width of the main rod hole.

Optionally, there are a plurality of said widened portions, and a plurality of said widened portions are arranged on said coupling main rod at intervals; the coupling windows are multiple, and the multiple coupling windows are arranged in one-to-one correspondence with the multiple widened parts.

Optionally, the widened portion is formed by protruding the coupling main rod toward the printed circuit board on a side close to the coupling window.

Optionally, the length of the coupling window is greater than or equal to the length of the widened portion, and the width of the coupling window is greater than or equal to the width of the widened portion.

Optionally, the gap between the widened portion and the printed circuit board ranges between 0.8mm and 1.5 mm.

Optionally, a surface of the widened portion facing the printed circuit board is an outer arc surface.

The application also discloses a filter, which comprises the coupler, wherein the coupler is arranged at the input end or the output end of the filter.

For in the limited space of wave filter, increase the diameter of whole coupling mobile jib, the scheme of reinforcing coupling effect, this application is through only setting up the widening portion in the position that the coupling mobile jib corresponds the coupling window, under the condition that does not influence the interior overall arrangement of wave filter cavity, make the widening portion be closer to printed circuit board, the distance between the position that the coupling mobile jib corresponds the coupling window and the printed circuit board has been reduced, because the position that the coupling mobile jib corresponds the coupling window adds the back, this just makes coupling area grow and distance diminish, make the part of coupling mobile jib can be better with the copper skin on the printed circuit board walk the line and couple like this, the coupling effect between coupling mobile jib and the printed circuit board has further been strengthened.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic view of a coupler according to a first embodiment of the present application;

FIG. 2 is a partial schematic view of a first embodiment of the present application after a printed circuit board is hidden by the coupler;

FIG. 3 is a schematic view of a coupler according to a second embodiment of the present application;

fig. 4 is a schematic diagram of a coupler according to a third embodiment of the present application.

10, a filter; 100. a coupler; 110. a coupling main rod; 120. a cavity; 130. a printed circuit board; 140. a coupling window; 150. a widening section; 121. a main rod hole; 160. an avoidance groove; 200. a connector is provided.

Detailed Description

It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.

Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The present application is described in detail below with reference to the figures and alternative embodiments.

Fig. 1 is a schematic view of a coupler according to a first embodiment of the present application, and fig. 2 is a partial schematic view of the coupler according to the first embodiment of the present application after a printed circuit board is hidden, as shown in fig. 1 and fig. 2, the present application discloses a coupler 100, which includes a coupling main rod 110, a cavity 120 and a printed circuit board 130, wherein the cavity 120 is provided with a main rod hole 121, the coupling main rod 110 is disposed in the main rod hole 121, a coupling window 140 is disposed on a side wall of the cavity 120, and the coupling main rod 110 is exposed from the coupling window 140; the pcb 130 is disposed at a position corresponding to the coupling window 140 and on a side of the cavity 120 away from the coupling stem 110, the coupling stem 110 is disposed at a position corresponding to the coupling window 140 and has a widened portion 150, a radial width of the widened portion 150 is greater than a radial width of the coupling stem 110, and a gap is formed between the widened portion 150 and the pcb 130.

Since the coupling main rod 110 is fixed in the main rod hole 121, the position of the coupling main rod 110 cannot be moved at will, and in order to enhance the coupling effect between the coupling main rod 110 and the printed circuit board 120, compared with the scheme of increasing the diameter of the entire coupling main rod 110 in the limited space of the filter 10 to enhance the coupling effect, the present application reduces the distance between the position of the coupling main rod 110 corresponding to the coupling window 140 and the printed circuit board 130 by providing the widened portion 150 only at the position of the coupling main rod 110 corresponding to the coupling window 140, and the width of the widened portion 150 is greater than the diameter of the coupling main rod 110, so that the widened portion 150 is closer to the printed circuit board 130 without affecting the layout in the cavity 120 of the filter 10, because the widened position of the coupling main rod 110 corresponding to the coupling window 140 increases the coupling area and decreases the distance, so that the local portion of the coupling main rod 110 can be better coupled with the copper sheet on the printed circuit board 130, the coupling effect between the coupling main rod 110 and the printed circuit board 130 is further enhanced. In the present application, the gap distance between the non-widened portion of the coupling stem 110 and the stem hole 121 is equal to the gap distance between the widened portion 150 and the stem hole 121.

The coupling main rod 110 and the main rod hole 121 may be coaxial or non-coaxial. In the present application, the coupling main rod 110 is not limited to a cylindrical shape, and may be various shapes such as an elliptic cylinder, a prism, and the like, and the present application only exemplifies that the coupling main rod 110 is a cylindrical shape.

As shown in fig. 1, the widened portion 150 is formed by the coupling main rod 110 protruding toward the printed circuit board 130 at a side close to the coupling window 140.

In this embodiment, the widened portion 150 is only disposed on one side of the coupling main rod 110 close to the coupling window 140, and the widened portion 150 is not disposed at other positions of the coupling main rod 110, that is, only one side of the coupling main rod 110 close to the coupling window 140 is widened corresponding to the position of the coupling window 140, so that the position of the coupling main rod 110 corresponding to the coupling window 140 is closer to the printed circuit board 130, which reduces the distance between the actual coupling position of the coupling main rod 110 and the printed circuit board 130, and enhances the coupling effect; in addition, a predetermined distance is provided between the widened portion 150 and the pcb 130 to prevent the widened portion 150 from directly contacting the copper traces of the pcb 130 to cause short circuit.

The coupling described in this application refers to the coupling between the main coupling rod 110 and the exposed copper traces on the pcb 130, so that there is a sufficient safety distance between the widened portion 150 and the pcb 130, and in this application, the gap between the widened portion 150 and the pcb 130 ranges from 0.8mm to 1.5 mm.

Since the coupling main rod 110 cannot be attached to the printed circuit board 130, otherwise, a short circuit may occur, and according to an actual use environment, when a preset distance between the widening portion 150 and the printed circuit board 130 is 0.8mm, the coupling main rod can be used on the filter 10 with a smaller power, so that a better coupling effect can be ensured. When the predetermined distance between the widened portion 150 and the printed circuit board 130 is 1.5mm, it can be used in the filter 10 having a larger power, which can ensure a better coupling effect.

Fig. 3 is a schematic diagram of a coupler according to a second embodiment of the present application, and as shown in fig. 3, the embodiment shown in fig. 3 is based on the improvement of fig. 1, in which a widened portion 150 is formed at a position of the coupling main rod 110 corresponding to the coupling window 140, and is formed to protrude around a circumference of the coupling main rod 110 away from a center line of the coupling main rod 110, and the main rod hole 121 is not in contact with the widened portion 150.

The difference between this embodiment and the previous embodiment is mainly that the widened portion 150 is disposed around the coupling main rod 110 corresponding to the coupling window 140, i.e., the diameter of the coupling main rod 110 is increased only at the position of the coupling main rod 110 corresponding to the coupling window 140, so that the coupling main rod 110 is widened coarsely, bringing the widened portion 150 closer to the printed circuit board 130, without affecting the layout of the filter 10 in the cavity 120, reduces the distance between the position of the coupling stem 110 corresponding to the coupling window 140 and the printed circuit board 130, since the diameter of the coupling main rod 110 is widened at the position corresponding to the coupling window 140, this makes the coupling area of the coupling main rod 110 and the printed circuit board 130 larger and the distance smaller, therefore, the local part of the coupling main rod 110 can be better coupled with the copper trace on the printed circuit board 130, and the coupling effect between the coupling main rod 110 and the printed circuit board 130 is further enhanced. Meanwhile, the widened part 150 formed by the diameter of the coupling main rod 110 at the position corresponding to the coupling window 140 is directly widened, so that the coupling main rod can be directly manufactured by integrally molding through a die during production, the process is simpler and more convenient, the production difficulty is reduced, and the production efficiency is improved.

Further, the main rod hole 121 is far away from the side wall of the coupling window 140, an avoiding groove 160 is disposed at a position corresponding to the widened portion 150, the avoiding groove 160 is formed by recessing the inner wall of the main rod hole 121 in a direction far away from the widened portion 150, and the length of the avoiding groove 160 is greater than that of the widened portion 150. And the radial width of the widened portion 150 is greater than or equal to the width of the main rod hole 121.

Since the widened portion 150 is formed by increasing the diameter of the coupling rod 110 at the position corresponding to the coupling window 140 in the present embodiment, a part of the widened portion 150 is closer to the side wall of the rod hole 121 away from the coupling window 140, and in order to avoid the short circuit phenomenon caused by the contact between the widened portion 150 and the side wall of the rod hole 121, an avoiding groove 160 is formed at the position corresponding to the widened portion 150 on the inner wall of the rod hole 121 at the side away from the coupling window 140, and the length of the avoiding groove 160 is greater than that of the widened portion 150, so that when the coupling rod 110 is installed in the rod hole 121, the avoiding groove 160 can accommodate the widened portion 150 and does not contact the widened portion 150, thereby effectively avoiding the widened portion 150 in the limited space of the cavity 120 of the filter 10.

In addition, the size of the coupling window 140 is related to the actual coupling area between the coupling main rod 110 and the printed circuit board 130, and the larger the coupling area between the coupling main rod 110 and the printed circuit board 130 is, the stronger the coupling effect is, so it can be designed that: the length of the coupling window 140 is greater than the length of the widened portion 150, and the width of the coupling window 140 is greater than or equal to the width of the widened portion 150.

In this embodiment, the widened portion 150 is disposed at a position of the coupling main rod 110 corresponding to the coupling window 140, and meanwhile, the size of the coupling window 140 may be increased, when the length of the coupling window 140 is greater than the length of the widened portion 150, the coupling window 140 may completely expose the widened portion 150 of the coupling main rod 110, and the widened portion 150 may not be shielded by other positions of the coupling window 140 due to the smaller coupling window 140; when the coupling window 140 completely exposes the widened portion 150, the coupling amount between the coupling main rod 110 and the printed circuit board 130 is greater, further enhancing the coupling effect between the coupling main rod 110 and the printed circuit board 130.

Fig. 4 is a schematic diagram of a coupler according to a third embodiment of the present application, and as shown in fig. 4, the embodiment shown in fig. 4 is a modification of fig. 1, and a side of the widened portion 150 facing the printed circuit board 130 is an outer arc surface.

According to the invention, the widened part 150 is only arranged at the position of the coupling main rod 110 corresponding to the coupling window 140, under the condition that the layout in the cavity 120 of the filter 10 is not influenced, the widened part 150 is closer to the printed circuit board 130, and the distance between the position of the coupling main rod 110 corresponding to the coupling window 140 and the printed circuit board 130 is reduced, because the position of the coupling main rod 110 corresponding to the coupling window 140 is thickened, the coupling area is enlarged and the distance is reduced, so that the local part of the coupling main rod 110 can be better coupled with a copper-clad wire on the printed circuit board 130, and the coupling effect between the coupling main rod 110 and the printed circuit board 130 is further enhanced.

In order to prevent the widened portion 150 of the coupling main rod 110 from contacting other devices on the printed circuit board 130 or the coupling window 140 when the widened portion 150 is disposed close to the printed circuit board 130, the side of the widened portion 150 of the coupling main rod 110 facing the printed circuit board 130 is configured as an outer arc surface, the outer arc surface has a certain arc to bend the whole surface, the cross-sectional area of the widened portion 150 is continuously reduced along the bending direction, the length of the widened portion 150 is also continuously reduced, thus the distance between the widened portion 150 and the side of the coupling window 140 is continuously reduced, the widened portion is not easily touched to other devices on the printed circuit board 130 to avoid the short circuit, and the arc top portion of the outer arc surface is closer to the printed circuit board 130, thereby enhancing the coupling effect.

The widening 150 of the present application is plural, and the plural widening 150 are provided at intervals on the coupling main rod 110; the plurality of coupling windows 140 are provided, and the plurality of coupling windows 140 are provided in one-to-one correspondence with the plurality of widened portions 150. The coupling area with the printed circuit board 130 is increased by the plurality of widened portions 150 through the plurality of coupling windows 140, and the coupling effect is further improved.

The application also discloses a filter 10, comprising the coupler 100, wherein the coupler 100 is arranged at the input end or the output end of the filter 10. The filter 10 further includes a connector 200, the connector 200 is connected to the cavity 120 of the filter 10 through the coupling main rod 110, the connector 200 is divided into an antenna end connector and a power amplifier end connector, and the antenna end connector and the power amplifier end connector are respectively connected to the antenna end and the power amplifier end of the filter 10 through the coupling main rod 110, so as to implement signal transmission of the filter 10. Of course, the coupler 100 of the present application is not limited to be used in the filter 10, and can be widely applied to radio frequency and microwave systems for signal power distribution and synthesis, power sampling and detection. Taking the example that the main rod is arranged at the input end, one end of the main rod is connected with the connector, the other end of the main rod is connected with the tap, and the main rod is connected with the resonator through the tap, or the other end of the main rod is connected with the connecting sheet, and the connecting sheet is further connected with the resonator through the low-pass connection tap.

It should be noted that the inventive concept of the present application can form many embodiments, but the present application has a limited space and cannot be listed one by one, so that, on the premise of no conflict, any combination between the above-described embodiments or technical features can form a new embodiment, and after the embodiments or technical features are combined, the original technical effect will be enhanced.

The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the specific implementations of the present application are not to be considered limited to these descriptions. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.

Claims

1. A coupler comprises a coupling main rod, a cavity and a printed circuit board, and is characterized in that a main rod hole is formed in the cavity, the coupling main rod is arranged in the main rod hole, a coupling window is formed in the side wall of the cavity, and the coupling main rod is exposed from the coupling window; the printed circuit board is arranged at the position corresponding to the coupling window and is arranged at one side of the cavity far away from the coupling main rod,

the position of the coupling main rod corresponding to the coupling window is provided with a widened part, the radial width of the widened part is larger than that of the coupling main rod, and a gap is reserved between the widened part and the printed circuit board.

2. The coupler of claim 1, wherein the widened portion is a location of the coupling main rod corresponding to the coupling window, and is formed to protrude around a center line of the coupling main rod in a circumferential direction away from the coupling main rod, and the main rod hole does not contact the widened portion.

3. The coupler of claim 2, wherein the main rod hole is far from the side wall of the coupling window, and an avoiding groove is provided at a position corresponding to the widened portion, the avoiding groove is formed by recessing an inner wall of the main rod hole in a direction far from the widened portion, and a length of the avoiding groove is greater than a length of the widened portion.

4. A coupler according to claim 3, wherein the widened portion has a radial width equal to or greater than the radial width of the main rod bore.

5. The coupler of claim 1, wherein there are a plurality of said widenings, said widenings being spaced apart on said coupling main rod; the coupling windows are multiple, and the multiple coupling windows are arranged in one-to-one correspondence with the multiple widened parts.

6. The coupler of claim 1, wherein the widened portion is formed by a protrusion of the coupling main rod toward the printed circuit board on a side thereof close to the coupling window.

7. The coupler of claim 1, wherein the length of the coupling window is equal to or greater than the length of the widened portion; the width of the coupling window is greater than or equal to the width of the widened portion.

8. The coupler of claim 1, wherein the gap between the widened portion and the printed circuit board ranges between 0.8mm and 1.5 mm.

9. A coupler according to any of claims 2 to 6, wherein the face of the widened portion facing the printed circuit board is an extrados face.

10. A filter comprising a coupler as claimed in any one of claims 1 to 9, said coupler being provided at an input or an output of said filter.