Tap coupling component and filter having the same

Abstract

The embodiment of the present invention discloses a tap coupling component and a filter having the tap coupling component, which belongs to the field of communication technology. The tap coupling component includes: an inner core conductor located on the side wall in the cavity of the filter; a first resonator located in the cavity; a coupling substrate connected to the first resonator; the coupling substrate is perpendicular to the bottom surface of the cavity and parallel to the inner core conductor. The coupling substrate in the embodiment of the present invention is located between the inner core conductor and the first resonator, so that the coupling amount is only related to the inner core conductor and the coupling substrate, and has nothing to do with the first resonator. In this way, when adjusting the frequency, the height of the first resonator can be adjusted arbitrarily without affecting the coupling amount, so that high frequency and strong coupling can be maintained at the same time.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of communication technology, and in particular to a tap coupling component and a filter having the tap coupling component. Background Art

[0002] With the popularization and application of 5G (5th Generation, fifth generation mobile communication technology) technology, filters are in great demand in 5G base stations, among which wider bandwidth or ultra-wideband filters are widely used.

[0003] In certain specific environments, the inner core conductor of the filter cannot be grounded. For example, direct current is required. In this case, the coupling method between the inner core conductor of the filter and the resonator needs to be non-contact through capacitive coupling.

[0004] Normally, capacitive coupling is achieved by placing the inner core conductor and the resonator in parallel. The disadvantage is that the greater the coupling amount, the lower the frequency. In order to maintain the original frequency, the height of the resonator needs to be lowered. However, lowering the height of the resonator will reduce the coupling area between the resonator and the inner core conductor, and the coupling amount will decrease, making it difficult to maintain high frequency and strong coupling at the same time. Summary of the invention

[0005] The embodiment of the present invention provides a tap coupling component and a filter having the tap coupling component, which are used to solve the problems in the prior art. The technical solution is as follows:

[0006] In one aspect, a tap coupling component is provided, the tap coupling component comprising:

[0007] An inner core conductor located on a side wall within a cavity of the filter;

[0008] a first resonator located within the cavity;

[0009] a coupling substrate connected to the first resonator;

[0010] The coupling substrate is perpendicular to the bottom surface of the cavity and parallel to and opposite to the inner core conductor.

[0011] In a possible implementation manner, the first resonator and the coupling substrate are integrally formed; or, the first resonator and the coupling substrate are connected by screws; or, the first resonator and the coupling substrate are connected by welding.

[0012] In a possible implementation manner, if the material of the coupling substrate is the same as the material of the cavity, the first resonator and the coupling substrate are integrally formed.

[0013] In a possible implementation manner, if the material of the coupling substrate is different from the material of the cavity, the first resonator is connected to the coupling substrate by screws or welding.

[0014] In a possible implementation manner, the parallel distance between the coupling substrate and the inner core conductor is negatively correlated with the coupling amount.

[0015] In a possible implementation manner, the size of the coupling area between the coupling substrate and the inner core conductor is positively correlated with the size of the coupling amount.

[0016] In a possible implementation manner, the height of the first resonator is negatively correlated with the frequency of the filter.

[0017] In one aspect, a filter with a tap coupling component is provided, wherein the filter comprises the tap coupling component as described above.

[0018] In a possible implementation manner, the filter further includes a cover plate, and the cover plate and the cavity are used to encapsulate the tap coupling component.

[0019] In a possible implementation, a plurality of openings are provided on the top of the cover plate, and an adjusting screw is provided in each opening, and the adjusting screw is used to adjust the height of the resonator.

[0020] The beneficial effects of the technical solution provided by the embodiment of the present invention include at least:

[0021] Since the tap coupling component includes a coupling substrate, the coupling substrate is perpendicular to the bottom surface of the cavity, connected to the first resonator, and parallel to the inner core conductor, that is, the coupling substrate is located between the inner core conductor and the first resonator, so that the coupling amount is only related to the inner core conductor and the coupling substrate, and has nothing to do with the first resonator. In this way, when adjusting the frequency, the height of the first resonator can be adjusted arbitrarily without affecting the coupling amount, so that high frequency and strong coupling can be maintained at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 is a schematic diagram of a tap coupling component in one embodiment of the present invention;

[0024] Figure 2It is a schematic diagram of a cavity of a filter in one embodiment of the present invention. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Please refer to Figure 1 , which shows a tap coupling component provided by an embodiment of the present invention, the tap coupling component includes: an inner core conductor 110, a first resonator 120 and a coupling substrate 130.

[0027] The tap coupling component in this embodiment can be applied to a filter, and the tap coupling component can be located in a cavity in the filter. The cavity of the filter can have many structures, and this embodiment does not limit the structure of the cavity.

[0028] The inner core conductor 110 may be located on the side wall of the cavity of the filter. The inner core conductor 110 is made of metal, which may be copper, aluminum, steel, etc., which is not limited in this embodiment. The inner core conductor 110 may be of any shape. Figure 1 In the example, the inner core conductor 110 is cylindrical, and a bottom surface of the inner core conductor 110 is fixed on the side wall in the cavity.

[0029] The cavity of the filter may be provided with a plurality of resonators, and the material of these resonators may be the same as that of the cavity, and the resonators and the cavity may be integrally formed. The tap coupling assembly in this embodiment only includes the first resonator 120, ie, the resonator closest to the input end of the filter.

[0030] The coupling substrate 130 is connected to the first resonator 120. The coupling substrate 130 is made of metal and can be in any shape. Figure 1 In the figure, the coupling substrate 130 is taken as a rectangle for illustration.

[0031] In this embodiment, the coupling substrate 130 is perpendicular to the bottom surface of the cavity and parallel to the inner core conductor 110. That is, the coupling substrate 130 is parallel to and opposite to the inner core conductor 110 in the vertical direction. In this way, the coupling substrate 130 is located between the first resonator 120 and the inner core conductor 110, so that the coupling amount is only related to the inner core conductor 110 and the coupling substrate 130, and has nothing to do with the first resonator 120. In this way, when adjusting the frequency, the height of the first resonator 120 can be adjusted arbitrarily without affecting the coupling amount, so that high frequency and strong coupling can be maintained at the same time.

[0032] There are multiple ways to connect the first resonator 120 and the coupling substrate 130, three of which are described below. The first connection method is that the first resonator 120 and the coupling substrate 130 are integrally formed; the second connection method is that the first resonator 120 and the coupling substrate 130 are connected by screws; the third connection method is that the first resonator 120 and the coupling substrate 130 are connected by welding.

[0033] The connection method between the first resonator 120 and the coupling substrate 130 is related to the material of the coupling substrate 130. For example, if the material of the coupling substrate 130 is the same as that of the cavity, the first resonator 120 and the coupling substrate 130 can be integrally formed. That is, the cavity, all resonators in the cavity, and the coupling substrate 130 can be integrally formed. Of course, when the material of the coupling substrate 130 is the same as that of the cavity, the cavity and the coupling substrate 130 can also be produced separately, and then the coupling substrate 130 can be connected to the first resonator 120 in the cavity by screws or welding.

[0034] If the material of the coupling substrate 130 is different from that of the cavity, the first resonator 120 and the coupling substrate 130 can be connected by screws or welding. That is, when the material of the coupling substrate 130 is different from that of the cavity, the cavity and the coupling substrate 130 can be produced separately, and then the coupling substrate 130 can be connected to the first resonator 120 in the cavity by screws or welding.

[0035] In this embodiment, the magnitude of the coupling amount is adjustable, and the manner of adjusting the coupling amount is described below.

[0036] In an optional embodiment, the coupling amount can be adjusted by adjusting the parallel distance between the coupling substrate 130 and the inner core conductor 110. Since the magnitude of the parallel distance between the coupling substrate 130 and the inner core conductor 110 is negatively correlated with the magnitude of the coupling amount, when a larger coupling amount is required, the parallel distance between the coupling substrate 130 and the inner core conductor 110 can be reduced, that is, the coupling substrate 130 and the inner core conductor 110 are brought closer; when a smaller coupling amount is required, the parallel distance between the coupling substrate 130 and the inner core conductor 110 can be increased, that is, the coupling substrate 130 and the inner core conductor 110 are moved away.

[0037] In another optional embodiment, the coupling amount can be adjusted by adjusting the coupling area between the coupling substrate 130 and the inner core conductor 110. Since the size of the coupling area between the coupling substrate 130 and the inner core conductor 110 is positively correlated with the size of the coupling amount, when a larger coupling amount is required, the coupling area between the coupling substrate 130 and the inner core conductor 110 can be increased; when a smaller coupling amount is required, the coupling area between the coupling substrate 130 and the inner core conductor 110 can be reduced.

[0038] Increasing the coupling area may include increasing the area of ​​the coupling substrate 130 and / or increasing the area of ​​the inner core conductor 110 , and decreasing the coupling area may include decreasing the area of ​​the coupling substrate 130 and / or decreasing the area of ​​the inner core conductor 110 .

[0039] In this embodiment, the frequency of the filter is adjustable. In an optional embodiment, the frequency can be adjusted by adjusting the height of the first resonator 120. Since the height of the first resonator 120 is negatively correlated with the frequency of the filter, when a higher frequency is required, the height of the first resonator 120 can be reduced; when a lower frequency is required, the height of the first resonator 120 can be increased. When adjusting the frequency, the size of the coupling substrate 130 can be kept unchanged, so that the frequency adjustment will not affect the coupling amount, so that high frequency and strong coupling can be maintained at the same time.

[0040] In summary, the tap coupling component provided in this embodiment includes a coupling substrate, which is perpendicular to the bottom surface of the cavity, connected to the first resonator, and parallel to the inner core conductor, that is, the coupling substrate is located between the inner core conductor and the first resonator, so that the coupling amount is only related to the inner core conductor and the coupling substrate, but has nothing to do with the first resonator. In this way, when adjusting the frequency, the height of the first resonator can be adjusted arbitrarily without affecting the coupling amount, thereby maintaining high frequency and strong coupling at the same time.

[0041] This embodiment also provides a filter with a tap coupling component, the filter comprising: Figure 1 For ease of understanding, please refer to Figure 2 , Figure 2 The cavity of the filter is shown.

[0042] The filter in this embodiment may further include a cover plate, and the cover plate and the cavity are used to encapsulate the tap coupling component. That is, the cover plate and the cavity may form a closed space, and the tap coupling component is located in the closed space.

[0043] In an optional embodiment, the top of the cover plate is provided with a plurality of openings, each of which is provided with an adjusting screw, and the adjusting screw is used to adjust the height of the resonator, wherein adjusting the height of the resonator means adjusting the depth of the adjusting screw penetrating into the resonator.

[0044] The filter provided in this embodiment has the characteristics of easy implementation, good consistency, easy processing and low cost.

[0045] The filter provided in this embodiment may be a relatively wideband or ultra-wideband strongly coupled filter for 5G or higher frequency bands.

[0046] The above description is not intended to limit the embodiments of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A tap coupling component, characterized in that: Applied in a filter, the tap coupling component comprises: An inner core conductor located on a side wall within a cavity of the filter; A first resonator located in the cavity, wherein the height of the first resonator is negatively correlated with the frequency of the filter; a coupling substrate connected to the first resonator; The coupling substrate is perpendicular to the bottom surface of the cavity and parallel to and opposite to the inner core conductor; The parallel distance between the coupling substrate and the inner core conductor is negatively correlated with the coupling amount, and the coupling area between the coupling substrate and the inner core conductor is positively correlated with the coupling amount.

2. The tap coupling assembly according to claim 1, characterized in that: The first resonator and the coupling substrate are integrally formed; or, The first resonator is connected to the coupling substrate via screws; or, The first resonator is connected to the coupling substrate by welding.

3. The tap coupling assembly according to claim 2, characterized in that: If the material of the coupling substrate is the same as that of the cavity, the first resonator and the coupling substrate are integrally formed.

4. The tap coupling assembly according to claim 2, characterized in that: If the material of the coupling substrate is different from that of the cavity, the first resonator is connected to the coupling substrate by screws or welding.

5. A filter having a tap coupling component, characterized in that: The filter comprises a tap coupling assembly as claimed in any one of claims 1 to 4.

6. The filter according to claim 5, characterized in that The filter further comprises a cover plate, and the cover plate and the cavity are used to encapsulate the tap coupling component.

7. The filter according to claim 6, characterized in that The top of the cover plate is provided with a plurality of openings, each of which is provided with an adjusting screw, and the adjusting screw is used to adjust the height of the resonator.

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