CN112993510A - Metal filter, filtering loop module and coupling quantity adjusting method - Google Patents
Metal filter, filtering loop module and coupling quantity adjusting method Download PDFInfo
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- CN112993510A CN112993510A CN202110414562.0A CN202110414562A CN112993510A CN 112993510 A CN112993510 A CN 112993510A CN 202110414562 A CN202110414562 A CN 202110414562A CN 112993510 A CN112993510 A CN 112993510A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/212—Frequency-selective devices, e.g. filters suppressing or attenuating harmonic frequencies
Abstract
The invention relates to a metal filter, a filter loop module and a coupling quantity adjusting method, wherein the filter loop module comprises five resonators, the five resonators are sequentially arranged along a signal transmission path to form a main loop, the main loop is provided with a first zero structure, a second zero structure and a third zero structure which are arranged at intervals relatively, the second zero structure is arranged between the first zero structure and the third zero structure, the first zero structure and the third zero structure are respectively and correspondingly provided with an inductive coupling part with adjustable coupling quantity, and the second zero structure is correspondingly provided with a capacitive coupling probe. The coupling quantity of the second zero point structure can be adjusted by adjusting the coupling quantity of the first zero point structure and/or the coupling quantity of the third zero point structure, so that the processing precision and the assembling precision of the capacitive coupling probe can be reduced.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a metal filter, a filtering loop module and a method for adjusting the coupling quantity.
Background
The filter is an indispensable communication device as a frequency-selecting device. With the rapid development of communication technology and the 5G era, a filter capable of reducing insertion loss and improving suppression is required. The filter loop module of the metal filter is provided with a capacitive coupling structure, the capacitive coupling structure generally includes a capacitive coupling probe (also called a capacitive coupling flying probe), and the capacitive coupling between the two resonators is realized by using the capacitive coupling probe. In practical applications, when the size (diameter, length, etc.) or the installation position of the capacitive coupling probe slightly deviates (tolerance ± 0.01mm), the loss and the suppression are affected, thereby increasing the processing difficulty and the assembly difficulty.
Disclosure of Invention
Therefore, it is necessary to provide a metal filter, a filter loop module, and a method for adjusting the coupling amount for solving the problems of high processing difficulty and high assembly difficulty.
The technical scheme is as follows:
on one hand, the filtering loop module comprises five resonators, the five resonators are sequentially arranged along a signal transmission path to form a main loop, the main loop is provided with a first zero structure, a second zero structure and a third zero structure which are arranged at intervals relatively, the second zero structure is arranged between the first zero structure and the third zero structure, the first zero structure and the third zero structure are respectively and correspondingly provided with an inductive coupling part with adjustable coupling quantity, and the second zero structure is correspondingly provided with a capacitive coupling probe.
In the filter loop module of the above embodiment, the signal can be transmitted from the first resonator to the last resonator in the main loop, so that the transmission of the signal is completed. And the magnitude of the coupling quantity of the first zero point structure and/or the magnitude of the coupling quantity of the third zero point structure are/is adjusted by adjusting the inductive coupling part, so that the magnitude of the coupling quantity of the second zero point structure is correspondingly changed, and the required coupling quantity is obtained. The coupling quantity of the second zero point structure can be adjusted by adjusting the coupling quantity of the first zero point structure and/or the coupling quantity of the third zero point structure, so that the processing precision and the assembling precision of the capacitive coupling probe can be reduced.
The technical solution is further explained below:
in one embodiment, the five resonators are sequentially a first resonator, a second resonator, a third resonator, a fourth resonator and a fifth resonator along a signal transmission path, wherein the first resonator and the fifth resonator are coupled and connected through the inductive coupling part, the first resonator and the fourth resonator are coupled and connected through the capacitive coupling probe, and the second resonator and the fourth resonator are coupled and connected through the inductive coupling part.
In one embodiment, the first resonator and the second resonator are coupled and connected through the inductive coupling portion, the second resonator and the third resonator are coupled and connected through the inductive coupling portion, the third resonator and the fourth resonator are coupled and connected through the capacitive coupling probe, and the fourth resonator and the fifth resonator are coupled and connected through the inductive coupling portion.
In one embodiment, the first resonator and the second resonator are coupled and connected through the inductive coupling portion, the second resonator and the third resonator are coupled and connected through the capacitive coupling probe, the third resonator and the fourth resonator are coupled and connected through the inductive coupling portion, and the fourth resonator and the fifth resonator are coupled and connected through the inductive coupling portion.
In one embodiment, the inductive coupling portion includes a coupling window and a coupling element, and the depth of the coupling element inserted into the coupling window is adjustable.
In one embodiment, the filter loop module further comprises an insulating support for supporting the capacitive coupling probe.
In one embodiment, each resonator is provided with a resonant cavity, and the filter loop module further comprises five frequency adjusting pieces, wherein the depth of the frequency adjusting pieces inserted into the resonant cavities is adjustable.
In one embodiment, the filter loop module further includes a coupling connector, and the coupling connector is disposed corresponding to the inductive coupling portion.
In another aspect, a metal filter is provided, which includes the filter loop module.
In the metal filter of the above embodiment, since the magnitude of the coupling amount of the second zero structure can be adjusted by adjusting the magnitude of the coupling amount of the first zero structure and/or the magnitude of the coupling amount of the third zero structure, the processing accuracy and the assembling accuracy of the capacitive coupling probe can be reduced.
In another aspect, a method for adjusting the coupling amount applied to the filter loop module is provided, in which the coupling amount of the second zero point structure is correspondingly improved by adjusting the coupling amount of the first zero point structure and/or the coupling amount of the third zero point structure, so as to obtain the required coupling amount.
The method for adjusting the coupling amount of the embodiment at least has the following advantages: (1) the size of the coupling quantity of the first zero point structure and/or the size of the coupling quantity of the third zero point structure can be adjusted by adjusting the inductive coupling part, so that the operation is flexible and convenient; (2) the coupling quantity of the second zero point structure can be adjusted by adjusting the coupling quantity of the first zero point structure and/or the coupling quantity of the third zero point structure, so that the processing error or the installation error of the capacitive coupling probe arranged corresponding to the second zero point structure can be compensated by adjusting the coupling quantity of the first zero point structure and/or the coupling quantity of the third zero point structure, the influence of the processing error or the assembly error of the capacitive coupling probe on related indexes is reduced or eliminated, and the processing difficulty and the assembly difficulty of the capacitive coupling probe are reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a filter loop module according to an embodiment;
FIG. 2 is an equivalent circuit diagram of one embodiment of the filter loop module of FIG. 1;
FIG. 3 is an equivalent circuit diagram of another embodiment of the filter loop module of FIG. 1;
FIG. 4 is an equivalent circuit diagram of yet another embodiment of the filter loop module of FIG. 1;
fig. 5 is an equivalent circuit diagram of another embodiment of the filter loop module of fig. 1.
Description of reference numerals:
100. the resonator comprises a filter loop module, 110, a resonator, 110a, a first resonator, 110b, a second resonator, 110c, a third resonator, 110d, a fourth resonator, 110e, a fifth resonator, 111, a resonant cavity, 120, a first zero structure, 130, a second zero structure, 140, a third zero structure, 150, an inductive coupling part, 151, a coupling window, 160, a capacitive coupling probe, 170, an insulating support part, 180, a frequency adjusting part, 190 and a coupling connecting part.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
As shown in fig. 1 to 3, in one embodiment, a filter loop module 100 is provided, which can be applied in a metal filter. Specifically, the filter loop module 100 includes five resonators 110. The five resonators 110 are sequentially arranged along the signal transmission path to form a main loop. The main circuit is provided with a first zero structure 120, a second zero structure 130 and a third zero structure 140 which are oppositely arranged at intervals. Second zero structure 130 is disposed between first zero structure 120 and third zero structure 140. The first zero structure 120 and the third zero structure 140 are respectively provided with an inductive coupling part 150 with adjustable coupling amount, and the second zero structure 130 is provided with a capacitive coupling probe 160.
In the filter loop module 100 of the above embodiment, a signal can be transmitted from the first resonator 110 to the last resonator 110 in the main loop, so that the transmission of the signal is completed. By adjusting inductive coupling unit 150, the magnitude of the coupling amount of first zero structure 120 and/or the magnitude of the coupling amount of third zero structure 140 are adjusted, so that the magnitude of the coupling amount of second zero structure 130 is changed accordingly, and thus the desired coupling amount is obtained. Since the magnitude of the coupling amount of the second zero point structure 130 can be adjusted by adjusting the magnitude of the coupling amount of the first zero point structure 120 and/or the magnitude of the coupling amount of the third zero point structure 140, the machining accuracy and the assembling accuracy of the capacitive coupling probe 160 can be reduced.
Of these, the first resonator 110 can serve as an input terminal for a signal and the last resonator 110 can serve as an output terminal for a signal.
In the conventional metal filter, a slight deviation in the size processing of the capacitive coupling probe 160 may affect the stop band suppression of the entire metal filter, so that the capacitive coupling probe 160 needs to be replaced again, which not only affects the assembly efficiency, increases the cost, but also increases the processing difficulty; in addition, the installation height of the capacitive coupling probe 160 or the relative distance between the capacitive coupling probe and the resonator 110 during the assembly process also needs to reach a certain precision, which not only affects the assembly efficiency, but also increases the assembly difficulty. In the conventional metal filter, the capacitive coupling probe 160 has a large influence on the relevant indexes. In the filtering loop module 100 of the embodiment of the application, since the coupling amount of the second zero structure 130 can be adjusted by adjusting the coupling amount of the first zero structure 120 and/or the coupling amount of the third zero structure 140, the processing error or the installation error of the capacitive coupling probe 160 corresponding to the second zero structure 130 can be compensated by adjusting the coupling amount of the first zero structure 120 and/or the coupling amount of the third zero structure 140, the influence of the processing error or the assembly error of the capacitive coupling probe 160 on the related indexes is reduced or eliminated, and thus the processing difficulty and the assembly difficulty of the capacitive coupling probe 160 are reduced.
Optionally, the capacitive coupling probe 160 may be machined to a tolerance of ± 0.1mm, which facilitates the production of the capacitive coupling probe 160.
The coupling amount of the first zero point structure 120 and the coupling amount of the third zero point structure 140 may be adjusted individually or simultaneously, and only the coupling amount of the second zero point structure 130 needs to be changed accordingly.
As shown in fig. 1 to 3, in one embodiment, the five resonators 110 are a first resonator 110a, a second resonator 110b, a third resonator 110c, a fourth resonator 110d and a fifth resonator 110e in sequence along a signal transmission path. The first resonator 110a and the fifth resonator 110e are coupled and connected by the inductive coupling unit 150. In this way, first resonator 110a and fifth resonator 110e cooperate to form first zero point structure 120, and the magnitude of the coupling amount of first zero point structure 120 can be adjusted by adjusting inductive coupling unit 150. The first resonator 110a and the fourth resonator 110d are coupled by a capacitive coupling probe 160. In this manner, first resonator 110a and fourth resonator 110d cooperate to form second zero structure 130. The second resonator 110b and the fourth resonator 110d are coupled and connected by an inductive coupling unit 150. In this way, second resonator 110b and fourth resonator 110d cooperate to form third zero point structure 140, and the magnitude of the coupling amount of first zero point structure 120 can be adjusted by adjusting inductive coupling unit 150. When the inductive coupling part 150 between the first resonator 110a and the fifth resonator 110e and/or the inductive coupling part 150 between the second resonator 110b and the fourth resonator 110d are adjusted, the coupling amount of the second zero structure 130 can be changed accordingly, so that the metal filter as a whole can meet the corresponding parameter requirements.
As shown in fig. 3, in one embodiment, the first resonator 110a and the second resonator 110b are coupled and connected by an inductive coupling portion 150. Second resonator 110b and third resonator 110c are coupled and connected by inductive coupling unit 150. The third resonator 110c and the fourth resonator 110d are coupled by a capacitive coupling probe 160. The fourth resonator 110d and the fifth resonator 110e are coupled and connected by an inductive coupling unit 150. As such, signals may be sequentially transferred along the first resonator 110a, the second resonator 110b, the third resonator 110c, the fourth resonator 110d, and the fifth resonator 110 e.
As shown in fig. 2, in one embodiment, the first resonator 110a and the second resonator 110b are coupled and connected by an inductive coupling portion 150, the second resonator 110b and the third resonator 110c are coupled and connected by a capacitive coupling probe 160, the third resonator 110c and the fourth resonator 110d are coupled and connected by the inductive coupling portion 150, and the fourth resonator 110d and the fifth resonator 110e are coupled and connected by the inductive coupling portion 150. As such, signals may be sequentially transferred along the first resonator 110a, the second resonator 110b, the third resonator 110c, the fourth resonator 110d, and the fifth resonator 110 e.
After one capacitive coupling probe 160 is disposed between the first resonator 110a and the fourth resonator 110d, another capacitive coupling probe 160 may be flexibly disposed between the second resonator 110b and the third resonator 110c or between the third resonator 110c and the fourth resonator 110d, so that the design of the filter loop module 100 is more flexible and meets the actual use requirement. Further, the machining accuracy and the assembling accuracy of the capacitive coupling probe 160 disposed between the second resonator 110b and the third resonator 110c or between the third resonator 110c and the fourth resonator 110d may be further reduced without affecting the performance of the metal filter.
Here, inductive coupling unit 150 may be any conventional structure capable of adjusting the magnitude of the coupling amount between two resonators 110.
As shown in fig. 1, in one embodiment, the inductive coupling portion 150 includes a coupling window 151 and a coupling member (not shown), and the depth of the coupling member inserted into the coupling window 151 is adjustable. So, through the degree of depth of adjusting the coupling piece and inserting in coupling window 151 to can adjust the size of coupling volume, it is simple, convenient, adjust efficiently. Wherein, the coupling piece can be rod-shaped, column-shaped or strip-shaped. The depth of insertion of the coupling element into the coupling window 151 may be achieved by moving the position of the coupling element within the coupling window 151, or by taking the form of removing the coupling element or increasing the length of the coupling element within the coupling window 151.
To facilitate mounting of the capacitive coupling probe 160, in one embodiment, the filter loop module 100 further includes an insulating support 170 for supporting the capacitive coupling probe 160. Thus, the insulating support 170 is used to support the capacitive coupling probe 160 and provide a mounting location, so as to prevent the capacitive coupling probe 160 from being shorted with the metal housing of the metal filter. The insulating support 170 and the capacitive coupling probe 160 may be connected by a snap, a plug, or the like. The insulating support 170 may be in the form of a support column or a support frame, and may be made of any insulating material. The insulating support 170 may be fixed to the metal housing by bonding or the like.
As shown in fig. 1, on the basis of any of the above embodiments, each resonator 110 is provided with a resonant cavity 111, and the filter loop module 100 further includes five frequency adjusting members 180, and the depth of the frequency adjusting members 180 inserted into the resonant cavity 111 is adjustable. Therefore, the depth of the frequency adjusting piece 180 inserted into the resonant cavity 111 is adjusted, so that the frequency can be adjusted simply and conveniently, and the adjusting efficiency is high. The frequency adjustment member 180 may be rod-shaped, column-shaped, or bar-shaped. The depth of the frequency adjustment member 180 inserted into the resonant cavity 111 can be achieved by moving the position of the frequency adjustment member 180 within the resonant cavity 111, or by removing the frequency adjustment member 180 or increasing the length of the frequency adjustment member 180 within the resonant cavity 111.
As shown in fig. 1, based on any of the above embodiments, the filter loop module 100 further includes a coupling connector 190, and the coupling connector 190 is disposed corresponding to the inductive coupling portion 150. Thus, the coupling amount between the resonators 110 can be further enhanced by using the coupling connecting member 190, so that the adjustment of the coupling amount is more flexible and convenient, and the adjustment range is wider.
As shown in fig. 1, the first resonator 110a and the fifth resonator 110e may be further coupled and connected by a coupling connection element 190, so that the adjustment manner of the magnitude of the coupling amount of the first zero structure 120 is more flexible, and the adjustment range is wider. Second resonator 110b and fourth resonator 110d may be further coupled by coupling connection element 190, so that the adjustment manner of the magnitude of the coupling amount of third zero point structure 140 is more flexible, and the adjustment range is wider. Of course, other resonators 110 coupled by the inductive coupling unit 150 may be further coupled by the coupling connector 190, so that coupling can be further enhanced, the adjustment method of the coupling amount can be more flexible, and the adjustment range can be wider.
As shown in fig. 1, of course, the coupling connector 190 may be disposed in cooperation with the inductive coupling portion 150, so that the adjustment manner of the coupling amount is more flexible, and the adjustment range is wider.
It should be noted that, as shown in fig. 4 and fig. 5, in other embodiments, the filter loop module 100 may further include more resonators 110 (the number of resonators 110 may be greater than five), and the remaining number of resonators 110 may also be connected with the five resonators 110 of the above embodiments to form a main loop including more resonators 110.
In one embodiment, a metal filter is further provided, which includes the filter loop module 100 of any of the above embodiments.
In the metal filter of the above embodiment, since the magnitude of the coupling amount of the second zero structure 130 can be adjusted by adjusting the magnitude of the coupling amount of the first zero structure 120 and/or the magnitude of the coupling amount of the third zero structure 140, the processing accuracy and the assembling accuracy of the capacitive coupling probe 160 can be reduced.
It should be noted that the filter loop module 100 of any of the above embodiments may also be applied to a duplexer, a combiner, or other suitable applications.
In one embodiment, there is further provided a method for adjusting the coupling amount of the filter loop module 100 applied to any of the above embodiments, including the following steps: by adjusting the magnitude of the coupling amount of first zero structure 120 and/or the magnitude of the coupling amount of third zero structure 140, the magnitude of the coupling amount of second zero structure 130 is correspondingly improved, and thus the required coupling amount is obtained.
The method for adjusting the coupling amount of the embodiment at least has the following advantages: (1) by adjusting the inductive coupling part 150, the magnitude of the coupling amount of the first zero structure 120 and/or the magnitude of the coupling amount of the third zero structure 140 can be adjusted, which is flexible and convenient; (2) the coupling amount of the second zero point structure 130 may be adjusted by adjusting the coupling amount of the first zero point structure 120 and/or the coupling amount of the third zero point structure 140, so that the processing error or the installation error of the capacitive coupling probe 160 corresponding to the second zero point structure 130 may be compensated by adjusting the coupling amount of the first zero point structure 120 and/or the coupling amount of the third zero point structure 140, the influence of the processing error or the assembly error of the capacitive coupling probe 160 on the related indexes is reduced or eliminated, and the processing difficulty and the assembly difficulty of the capacitive coupling probe 160 are reduced.
The "certain body" and the "certain portion" may be a part corresponding to the "member", that is, the "certain body" and the "certain portion" may be integrally formed with the other part of the "member"; the "part" can be made separately from the "other part" and then combined with the "other part" into a whole. The expressions "a certain body" and "a certain part" in the present application are only one example, and are not intended to limit the scope of the present application for reading convenience, and the technical solutions equivalent to the present application should be understood as being included in the above features and having the same functions.
It should be noted that, the components included in the "unit", "assembly", "mechanism" and "device" of the present application can also be flexibly combined, i.e., can be produced in a modularized manner according to actual needs, so as to facilitate the modularized assembly. The division of the above-mentioned components in the present application is only one example, which is convenient for reading and is not a limitation to the protection scope of the present application, and the same functions as the above-mentioned components should be understood as equivalent technical solutions in the present application.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to," "disposed on," "secured to," or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one element is considered as "fixed transmission connection" with another element, the two elements may be fixed in a detachable connection manner or in an undetachable connection manner, and power transmission can be achieved, such as sleeving, clamping, integrally-formed fixing, welding and the like, which can be achieved in the prior art, and is not cumbersome. When an element is perpendicular or nearly perpendicular to another element, it is desirable that the two elements are perpendicular, but some vertical error may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It should also be understood that in explaining the connection relationship or the positional relationship of the elements, although not explicitly described, the connection relationship and the positional relationship are interpreted to include an error range which should be within an acceptable deviation range of a specific value determined by those skilled in the art. For example, "about," "approximately," or "substantially" may mean within one or more standard deviations, without limitation.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A filtering loop module is characterized by comprising five resonators, wherein the five resonators are sequentially arranged along a signal transmission path to form a main loop, the main loop is provided with a first zero structure, a second zero structure and a third zero structure which are arranged at intervals relatively, the second zero structure is arranged between the first zero structure and the third zero structure, the first zero structure and the third zero structure are respectively and correspondingly provided with an inductive coupling part with adjustable coupling quantity, and the second zero structure is correspondingly provided with a capacitive coupling probe.
2. The filter loop module of claim 1, wherein five resonators are a first resonator, a second resonator, a third resonator, a fourth resonator and a fifth resonator in sequence along a signal transmission path, wherein the first resonator and the fifth resonator are coupled and connected by the inductive coupling portion, the first resonator and the fourth resonator are coupled and connected by the capacitive coupling probe, and the second resonator and the fourth resonator are coupled and connected by the inductive coupling portion.
3. The filter loop module of claim 2, wherein the first resonator and the second resonator are coupled and connected by the inductive coupling portion, the second resonator and the third resonator are coupled and connected by the inductive coupling portion, the third resonator and the fourth resonator are coupled and connected by the capacitive coupling probe, and the fourth resonator and the fifth resonator are coupled and connected by the inductive coupling portion.
4. The filter loop module of claim 2, wherein the first resonator and the second resonator are coupled and connected by the inductive coupling portion, the second resonator and the third resonator are coupled and connected by the capacitive coupling probe, the third resonator and the fourth resonator are coupled and connected by the inductive coupling portion, and the fourth resonator and the fifth resonator are coupled and connected by the inductive coupling portion.
5. The filter loop module of any one of claims 1 to 4, wherein the inductive coupling portion comprises a coupling window and a coupling element, and a depth of the coupling element inserted into the coupling window is adjustable.
6. The filter loop module of any of claims 1 to 4, further comprising an insulating support for supporting the capacitive coupling probe.
7. The filter loop module according to any one of claims 1 to 4, wherein each of the resonators is provided with a resonant cavity, and further comprising five frequency adjusting members, the depth of the frequency adjusting members inserted into the resonant cavity being adjustable.
8. The filter loop module according to any one of claims 1 to 4, further comprising a coupling connector, wherein the coupling connector is disposed corresponding to the inductive coupling portion.
9. A metal filter comprising a filter loop module according to any one of claims 1 to 8.
10. A method for adjusting the coupling amount of the filter loop module according to any one of claims 1 to 8, comprising the steps of: by adjusting the coupling quantity of the first zero point structure and/or the coupling quantity of the third zero point structure, the coupling quantity of the second zero point structure is correspondingly improved, and the required coupling quantity is obtained.
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| CN202110414562.0A CN112993510A (en) | 2021-04-16 | 2021-04-16 | Metal filter, filtering loop module and coupling quantity adjusting method |
| PCT/CN2022/082345 WO2022218113A1 (en) | 2021-04-16 | 2022-03-22 | Metal filter, filtering loop module, and method for adjusting amount of coupling |
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| CN202110414562.0A CN112993510A (en) | 2021-04-16 | 2021-04-16 | Metal filter, filtering loop module and coupling quantity adjusting method |
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| WO2022218113A1 (en) * | 2021-04-16 | 2022-10-20 | 京信射频技术(广州)有限公司 | Metal filter, filtering loop module, and method for adjusting amount of coupling |
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| CN214589198U (en) * | 2021-04-16 | 2021-11-02 | 京信射频技术(广州)有限公司 | Metal filter and filtering loop module |
| CN112993510A (en) * | 2021-04-16 | 2021-06-18 | 京信射频技术(广州)有限公司 | Metal filter, filtering loop module and coupling quantity adjusting method |
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2022
- 2022-03-22 WO PCT/CN2022/082345 patent/WO2022218113A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022218113A1 (en) * | 2021-04-16 | 2022-10-20 | 京信射频技术(广州)有限公司 | Metal filter, filtering loop module, and method for adjusting amount of coupling |
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| Publication number | Publication date |
|---|---|
| WO2022218113A1 (en) | 2022-10-20 |
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