CN214411482U - Frame type resonator and filter - Google Patents

Abstract

The utility model provides a frame-type syntonizer and wave filter, this frame-type syntonizer includes: a resonant cavity, which is a semi-closed structure and comprises at least one opening; the frame-type resonant chip is arranged in the cavity and comprises a frame and a resonant strip, one end of the resonant strip is connected with the frame, the other end of the resonant strip is arranged in the resonant cavity in a suspended mode, and the frame is connected with the resonant cavity. The utility model adopts the mode that the resonance strip is connected with the frame and the frame type resonance piece is arranged in the resonance cavity, so that the assembly is simpler, the resonance cavity can be directly processed by section bars or metal packaging boxes, the weight is light, and the cost is low; the frame-type resonance sheet can be obtained by stamping, cutting and the like of a metal plate, the processing is convenient, the number of mounting fixed points is small, and the fault tolerance rate is high.

Description

Frame type resonator and filter

Technical Field

The utility model relates to a communication equipment technique especially relates to a frame-type syntonizer and wave filter.

Background

The filter is an important device in a communication system, has the functions of enabling useful signals to pass through without attenuation as much as possible and enabling useless signals to be attenuated as much as possible so as to achieve the effect of filtering signals with different frequencies, and is mature in process and wide in application because the traditional metal coaxial cavity filter adopts the cylindrical resonance strip.

With the development of integration and miniaturization of 5G communication technology, very high requirements are put on the size, weight and cost of the filter, and it is difficult to meet the requirements of further miniaturization by using the conventional cylindrical metal resonance strip, so that a new scheme is urgently needed to further reduce the size and cost of the filter.

Disclosure of Invention

An object of the utility model is to provide an easily assemble, processing convenient frame-type syntonizer.

Another object of the present invention is to provide a filter which is simple to assemble and low in cost.

The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

According to an aspect of the utility model, a frame-type syntonizer is provided, include:

a resonant cavity, which is a semi-closed structure and comprises at least one opening;

the frame-type resonant chip is arranged in the cavity and comprises a frame and a resonant strip, one end of the resonant strip is connected with the frame, the other end of the resonant strip is arranged in the resonant cavity in a suspended mode, and the frame is connected with the resonant cavity.

In one embodiment, the frame resonator has a metal plate covering the opening of the resonant cavity.

In one embodiment, the resonant cavity surface of the frame resonator is covered with a good conductor metal layer.

In one embodiment, the resonance strip of the frame resonator is formed by one segment or by a plurality of segments connected end to end.

In one embodiment, the multiple segments of the frame resonator are in the same plane.

In one embodiment, the resonance strips of the frame resonator are integrally formed with the frame.

In an embodiment, the frame of the frame resonator is a closed-loop narrow sheet-like structure or a rod-like structure.

In one embodiment, a frequency adjusting screw is disposed on the resonant cavity of the frame resonator, and one end of the frequency adjusting screw extends to the resonant bar.

According to the utility model discloses an on the other hand still provides a wave filter, include:

the cavity is of a semi-closed structure and comprises at least one opening, and a signal input and output structure is arranged on the cavity;

the frame-type resonance sheet is arranged in the cavity and comprises a frame and at least two resonance strips, one ends of the resonance strips are connected with the frame, the other ends of the resonance strips are arranged in the cavity in a suspended mode, and the frame is connected with the cavity.

In one embodiment, the opening of the cavity of the filter is covered with a metal sheet.

In one embodiment, the cavity surface of the filter is covered with a good conductor metal layer.

In one embodiment, the resonance strip of the filter is formed by one segment or by connecting a plurality of segments end to end.

In one embodiment, the multiple segments of the filter are in the same plane.

In one embodiment, the resonance bars of the filter are integrally formed with the frame.

In an embodiment, said frame of the filter is a closed loop narrow sheet-like structure or a rod-like structure.

In one embodiment, a debugging screw is arranged on the cavity of the filter, and the debugging screw extends to the resonance strip or a position between the resonance strips.

In one embodiment, spacers are arranged between the resonance strips of the filter, said spacers being connected to at least one face of the cavity.

In an embodiment, the frame-type resonator plate of the filter includes a first resonator strip, a second resonator strip, a third resonator strip, a fourth resonator strip, a fifth resonator strip, and a sixth resonator strip, where the first resonator strip, the second resonator strip, the fifth resonator strip, and the sixth resonator strip are disposed on one side of the frame, and the third resonator strip and the fourth resonator strip are disposed on the other opposite side of the frame.

In an embodiment, a first metal spacer and a second metal spacer are disposed within the cavity of the filter, the first metal spacer being disposed between the third resonance strip and the first and second resonance strips, and the second metal spacer being disposed between the fourth resonance strip and the fifth and sixth resonance strips.

In one embodiment, the tuning screw of the filter is disposed at a central position of the upper surface of the cavity and located between the second resonance strip, the third resonance strip, the fourth resonance strip and the fifth resonance strip.

The embodiment of the utility model provides a beneficial effect is: the resonant strip is connected with the frame, and the frame-type resonant chip is arranged in the resonant cavity, so that the assembly is simpler, the resonant cavity can be directly processed by a section bar or a metal packaging box, the weight is light, and the cost is low; the frame-type resonance sheet can be obtained by stamping, cutting and the like of a metal plate, the processing is convenient, the number of mounting fixed points is small, and the fault tolerance rate is high.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

The above features and advantages of the present invention will be better understood upon reading the detailed description of embodiments of the present disclosure in conjunction with the following drawings. In the drawings, components are not necessarily drawn to scale, and components having similar relative characteristics or features may have the same or similar reference numerals.

Fig. 1 is a schematic perspective view of an embodiment of a frame resonator according to the present invention;

fig. 2 is a schematic perspective view of another embodiment of a frame resonator according to the present invention;

fig. 3 is a schematic structural diagram of a frame-type resonator plate according to another embodiment of the present invention;

fig. 4 is a schematic perspective view of an embodiment of the filter of the present invention;

fig. 5 is a schematic plan view of a frame-type resonator plate according to an embodiment of the filter of the present invention;

fig. 6 is a graph of S-parameter curves for an embodiment of the filter of the present invention.

Wherein: 1-a resonant cavity; 2-frame type resonance sheet; 21-a frame; 22-resonant bars; 3-frequency adjustment screw; 4-a cavity; 5-frame type resonance sheet; 6-signal input output structure; 71-a first resonant strip; 72-a second resonant bar; 73-a third resonance bar; 74-a fourth resonance bar; 75-a fifth resonance bar; 76-sixth resonance bar; 81-a first metal spacer; 82-a second metal spacer; 9-adjusting the screw.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be understood as imposing any limitation on the scope of the present invention.

As shown in fig. 1, an embodiment of the present invention provides a frame-type resonator, which includes a resonant cavity 1 and a frame-type resonant chip 2 disposed in the resonant cavity 1. The resonant cavity 1 is a semi-closed structure and comprises at least one opening; the frame-type resonant chip 2 comprises a frame 21 and a resonant strip 22, wherein one end of the resonant strip 22 is connected with the frame 21, the other end of the resonant strip 22 is suspended in the resonant cavity 1, and the frame 21 is connected with the resonant cavity 1.

It should be noted that the resonant cavity 1 is generally box-shaped. The semi-closed structure described in this application is understood to comprise at least three connected faces. For example, the cavity 1 may be opened at the right side surface thereof as shown in fig. 1, or may be opened at the front surface of the cavity 1 as shown in fig. 2. It will be readily appreciated that the cavity 1 may also be of a form including only front, rear and lower faces.

When the resonator is installed, the frame-type resonant chip 2 needs to be installed into the resonant cavity 1 from the opening of the resonant cavity 1 and fixed. The frame 21 and the resonant cavity 1 may be fixed by bolting, welding or riveting, and the fixing manner is not limited.

In the prior art, there is a technical solution for connecting the resonance strip to the frame, for example, patent CN201910043685.0 provides a filter, which includes a filter frame and at least two resonators, the frame of the filter directly forms the resonance cavity, and the resonance strip is integrally formed with the frame, which is equivalent to that the resonance strip and the resonance cavity need to be processed at the same time at one time, so that when the frame (i.e. the casing of the resonance cavity) is processed, the resonance strip is limited and influenced. In the application, the frame-type resonant chip 2 is separated from the resonant cavity 1, so that the resonant cavity 1 can be independently processed, and the processing is more convenient. For example, the resonant cavity 1 may be directly cut from a metal section, or may be made of metal or plastic by machining or die casting.

In addition, the separated arrangement of the resonant cavity 1 and the frame 21 in the present application has an advantage that the housing of the resonant cavity 1 or the frame-type resonant chip 2 can be replaced individually as required, so that the resonant cavity can be recycled and reused more easily.

In a possible embodiment, a metal sheet (not shown) may be used to cover the opening of the resonant cavity 1 for better electromagnetic shielding. In addition, a good conductor metal layer can be covered on the surface of the resonant cavity 1 to improve the conductivity and reduce the loss.

The resonant bar 22 may be formed by one segment or by connecting a plurality of segments end to end. The extension direction of each segment can be horizontal, vertical or irregular, such as oblique connection. The resonant frequency of the resonant bars can be adjusted by adjusting the length and width of the different resonant bar segments, with the longer the resonant bar 22, the lower the resonant frequency, and the shorter the length, the higher the resonant frequency.

Preferably, the resonance strip 22 and the frame 21 are in the same plane, and different segments of the resonance strip 22 are in the same plane, so that the integral molding facilitates the processing. The segments of the resonant strip 22 may not be in the same plane, as shown in fig. 3, and may be bent or twisted at one or more segments to tilt, or rotate so that the segment or segments are in a different plane than the other segments.

Traditional coaxial syntonizer is cylindricality spatial structure, and direction of height size is great, is difficult to the compression, and the utility model discloses resonance strip 22 in the syntonizer is plane sheet structure, and the height dimension reduces greatly.

The resonance strip 22 and the frame 21 may be made into a separate structure, and the starting end of the resonance strip 22 and the frame 21 are fixed by welding, screwing, or the like, or the resonance strip 22 and the frame 21 may be made into a single body and integrally formed by cutting, stamping, injection molding, or the like. Furthermore, when the resonance strip 22 and the frame 21 are formed by sheet metal, a good conductor metal layer can be coated on the surface of the resonance strip to reduce the conductor loss and improve the weldability.

In order to ensure a certain strength of the frame 21 structure itself, a closed loop narrow sheet structure (i.e., rectangular in cross section) or a rod structure (i.e., circular in cross section) may be used, so that the frame 21 is not easily deformed during the installation process. In addition, the position of the frame 21 in the resonant cavity 1 can be set as required, and can be centered or adjusted back and forth.

In a possible embodiment, a frequency adjustment screw 3 may also be provided on the resonant cavity 1, one end of the frequency adjustment screw 3 extending towards the resonant bar 22. The lower the resonant frequency of the resonant bar 22, the closer the adjustment screw is screwed to the resonant bar 22. Conversely, unscrewing the screw away from the resonant bar 22 increases the resonant frequency of the resonant bar 22.

The embodiment of the utility model provides a filter is still provided, as shown in fig. 4, including cavity 4 and the frame-type resonance piece 5 that sets up in cavity 4, its improvement point is similar with above-mentioned frame-type syntonizer, and the difference lies in still being provided with signal input output structure 6 on cavity 4, and the resonance strip on the frame-type resonance piece 5 has a plurality ofly to can realize filtering capability. Possible modifications of the filter can also refer to the above-mentioned embodiments of the resonator, for example, a metal cover sheet may be provided, a metal layer covering a good conductor may be provided, and details are not repeated.

The filter can realize the filtering characteristic by adjusting the position and the arrangement mode among different resonance strips during design and processing, and adjust the filtering characteristic by adjusting the length, the width, the extension direction, the bending angle and the like of different segments of each resonance strip so as to meet the performance index. Compared with the traditional metal cavity, the cross coupling is realized by adding an additional flying rod structure, and the flying rod structure is omitted. In addition, a debugging screw 9 can be arranged on the cavity 4, the debugging screw 9 extends to the resonance strip or the position between the resonance strips, and the filtering characteristic of the filter is adjusted through the debugging screw 9.

In a possible embodiment, spacers can also be arranged between different resonant strips to achieve electromagnetic isolation. The spacer is a metal sheet or a plastic sheet with a metal layer coated on the surface, a PCB board, etc. The spacer is connected to the upper surface, the lower surface, or both the upper and lower surfaces of the chamber.

Fig. 5 provides a specific filter embodiment, and as shown in fig. 5, the frame-type resonator plate 5 is disposed at the middle position of the cavity 4. The frame-type resonator plate 5 comprises a first resonator strip 71, a second resonator strip 72, a third resonator strip 73, a fourth resonator strip 74, a fifth resonator strip 75 and a sixth resonator strip 76, wherein the first resonator strip 71, the second resonator strip 72, the fifth resonator strip 75 and the sixth resonator strip 76 are arranged on one side of the frame, and the third resonator strip 73 and the fourth resonator strip 74 are arranged on the opposite side of the frame.

The third resonance strip 73 and the fourth resonance strip 74 are close to the root section connected with the frame to form magnetic coupling, and the top sections far away from the frame of the other resonance strips are close to each other to form electric coupling. The coupling strength between each other can be adjusted by adjusting the distance between the roots or head segments of adjacent resonance strips. The closer the distance, the stronger the coupling strength and vice versa.

A first metal spacer 81 and a second metal spacer 82 are disposed in the cavity 4, and the first metal spacer 81 is disposed between the third resonance strip 73 and the first resonance strip 72 and the second resonance strip 72 for adjusting the coupling between the third resonance strip 73 and the first resonance strip 71 and the second resonance strip 72. A second metal spacer 82 is disposed between the fourth resonant strip 74 and the fifth and sixth resonant strips 75 and 76 for adjusting the coupling between the fourth resonant strip 74 and the fifth and sixth resonant strips 75 and 76.

The tuning screw 9 is provided at a central position of the upper surface (front surface in fig. 5) of the cavity 4 between the second resonance strip 72, the third resonance strip 73, the fourth resonance strip 74 and the fifth resonance strip 75 to adjust the coupling between the second resonance strip 72, the third resonance strip 73, the fourth resonance strip 74 and the fifth resonance strip 75.

The filter has the advantages that: the cavity is a section bar or other metal packaging boxes with shielding effect, so that the weight is light and the cost is low; the frame-type resonance piece can be of an integrated structure, can be obtained by means of sheet metal stamping, linear cutting and the like, and is simple to assemble, light in weight, low in cost and good in consistency; the cross coupling is realized by adjusting the positions and the arrangement modes of different resonance strips, and compared with the traditional metal cavity, the cross coupling is realized by adding an additional flying rod structure, so that the flying rod structure is omitted, the cost is lower, the topological structure is more flexible, and the mass production is facilitated; because there is no extra flying rod structure, the far-end harmonic index is more excellent, fig. 6 is the S parameter curve of the filter provided by the present invention, and it can be seen from the figure that its harmonic is after 7.5G.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The above description is only a preferred example of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.

Claims (20)

1. A frame resonator, comprising:

a resonant cavity, which is a semi-closed structure and comprises at least one opening;

the frame-type resonant chip is arranged in the resonant cavity and comprises a frame and a resonant strip, one end of the resonant strip is connected with the frame, the other end of the resonant strip is arranged in the resonant cavity in a suspended mode, and the frame is connected with the resonant cavity.

2. A frame resonator according to claim 1, wherein: and a metal sheet is covered at the opening of the resonant cavity.

3. A frame resonator according to claim 1, wherein: and a good conductor metal layer covers the surface of the resonant cavity.

4. A frame resonator according to claim 1, wherein: the resonance strip is formed by one section of segment or formed by connecting a plurality of sections of segments end to end.

5. A frame resonator according to claim 4, wherein: the multiple segments are in the same plane.

6. A frame resonator according to claim 1, wherein: the resonance strip is integrally formed with the frame.

7. A frame resonator according to claim 1, wherein: the frame is a closed loop narrow sheet-like structure or a rod-like structure.

8. A frame resonator according to claim 1, wherein: and a frequency adjusting screw is arranged on the resonant cavity, and one end of the frequency adjusting screw extends to the resonant strip.

9. A filter, comprising:

the cavity is of a semi-closed structure and comprises at least one opening, and a signal input and output structure is arranged on the cavity;

the frame-type resonance sheet is arranged in the cavity and comprises a frame and at least two resonance strips, one ends of the resonance strips are connected with the frame, the other ends of the resonance strips are arranged in the cavity in a suspended mode, and the frame is connected with the cavity.

10. The filter of claim 9, wherein: and a metal sheet is covered at the opening of the cavity.

11. The filter of claim 9, wherein: and a good conductor metal layer covers the surface of the cavity.

12. The filter of claim 9, wherein: the resonance strip is formed by one section of segment or formed by connecting a plurality of sections of segments end to end.

13. The filter of claim 12, wherein: the multiple segments are in the same plane.

14. The filter of claim 9, wherein: the resonance strip is integrally formed with the frame.

15. The filter of claim 9, wherein: the frame is a closed loop narrow sheet-like structure or a rod-like structure.

16. The filter of claim 9, wherein: the cavity is provided with debugging screws, and the debugging screws extend to the resonance strips or positions among the resonance strips.

17. The filter of claim 9, wherein: a spacer is arranged between the resonance strips and is connected with at least one surface of the cavity.

18. The filter of claim 16, wherein: the frame-type resonance sheet comprises a first resonance strip, a second resonance strip, a third resonance strip, a fourth resonance strip, a fifth resonance strip and a sixth resonance strip, wherein the first resonance strip, the second resonance strip, the fifth resonance strip and the sixth resonance strip are arranged on one side of the frame, and the third resonance strip and the fourth resonance strip are arranged on the opposite side of the frame.

19. The filter of claim 18, wherein: be provided with first metal spacer and second metal spacer in the cavity, first metal spacer set up in between third resonance strip and first resonance strip and the second resonance strip, second metal spacer set up in between fourth resonance strip and fifth resonance strip and the sixth resonance strip.

20. The filter of claim 19, wherein: the debugging screw is arranged in the center of the upper surface of the cavity and is positioned among the second resonance strip, the third resonance strip, the fourth resonance strip and the fifth resonance strip.

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