CN109713413B - Coupling structure of band-stop characteristic communication front-end equipment component - Google Patents
Coupling structure of band-stop characteristic communication front-end equipment component Download PDFInfo
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- CN109713413B CN109713413B CN201910135549.4A CN201910135549A CN109713413B CN 109713413 B CN109713413 B CN 109713413B CN 201910135549 A CN201910135549 A CN 201910135549A CN 109713413 B CN109713413 B CN 109713413B
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- 238000010168 coupling process Methods 0.000 title claims abstract description 175
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- 238000005452 bending Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 34
- 229910052755 nonmetal Inorganic materials 0.000 claims description 21
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
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- 150000001879 copper Chemical class 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000006880 cross-coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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Abstract
A coupling structure of a communication front-end equipment component with a band-stop characteristic. According to the invention, the width, the length, the bending position and/or the bending angle of the metal connecting component for connecting the stop band coupling cavity and the coupling component are adjusted, so that the impedance and the electrical length of the coupling component can be flexibly and effectively compensated, the electrical performance of the band-stop filter is improved, and the design volume of the band-stop filter is reduced. The coupling structure can be widely used in communication front-end equipment components such as microwave band-stop filters or band-stop combiners.
Description
Technical Field
The invention relates to the field of microwave devices, in particular to a coupling structure of a communication front-end equipment component with a band-stop characteristic.
Background
The band-stop filter, the combiner and the like are widely applied to front-end equipment in the communication field, and the quality of the product index can directly influence the whole communication quality. To meet some specifications such as: capacitive cross coupling, tap coupling, volume, weight, technical indexes and the like, and the coupling component can be coupled with the main rod of the resonant rod in the product design process. When the coupling component is coupled with the main rod of the resonant rod, indexes such as the sensitivity of the coupling surface and the like are difficult to meet for some high-requirement products due to the limitations of structures, sizes and the like and the machining errors of the components. The electrical length and impedance requirements actually required by the band-stop filter often contradict indexes such as sensitivity of the coupling surface, so that product indexes cannot be met, and the band-stop filter has poor performance and poor consistency.
Disclosure of Invention
The invention aims at the defects of the prior art and provides a coupling structure of a communication front-end equipment component with a band-stop characteristic. The invention adopts the following technical scheme.
First, to achieve the above object, a coupling structure of a band-stop characteristic communication front-end device component is provided, which includes: the main transmission rod is used for transmitting microwave signals; the coupling component comprises at least one fixed end and a coupling end, the fixed end is connected with the main transmission rod, and the coupling end extends from the main transmission rod into the corresponding stop band coupling cavity; the metal connecting component is arranged in the stop band coupling cavity, extends from the bottom of the stop band coupling cavity to the side face of the coupling end of the coupling component and is used for compensating the electric length and/or the impedance of the coupling component to match with the stop band frequency corresponding to the stop band coupling cavity.
Optionally, in the coupling structure of the band-stop characteristic communication front-end device component, the metal connection component is electrically connected with a coupling end of the coupling component.
Optionally, in the coupling structure of the band-stop characteristic communication front-end device component, the metal connection component is fixed at the bottom of the stop band coupling cavity by a metal fixing screw, and is close to one side of the coupling component; the metal connecting part is provided with at least one bending part, and the position fixed by the metal fixing screw extends upwards to be electrically connected with the coupling end of the coupling part.
Optionally, in the coupling structure of the band-stop characteristic communication front-end device component, a fixed end of the coupling component is fixed on an outer side of the stop band coupling cavity through an insulating fixing component.
Optionally, in the coupling structure of the communication front-end equipment component with the band-stop characteristic, the insulating fixing component includes a non-metal supporting ring and a non-metal screw; the non-metal support ring is arranged at the bottom of the cavity where the main transmission rod is positioned, and the inner diameter of the non-metal support ring is matched with the thread diameter of the non-metal screw; the fixed end of the coupling component is provided with a through hole for fixing the nonmetal screw; the nonmetal screw passes through the through hole to fix the stiff end of coupling part in the upper surface of nonmetal support ring, the height of nonmetal support ring can at least support the coupling part is all the time with stop band coupling chamber or the inner wall of the cavity that main transmission pole is located does not contact.
Optionally, in the coupling structure of the band-stop characteristic communication front-end device component, a resonator is further disposed in the stop band coupling cavity, the resonator is in a hollow cylindrical structure, and the lower side of the resonator is fixed at the middle position of the bottom of the stop band coupling cavity through a resonator fixing screw 0; the coupling end of the coupling component extends from the main transmission rod to the diameter direction of the resonator, and the coupling end of the coupling component is also provided with a bend towards the bottom of the stop band coupling cavity at a position close to the resonator, and the bent coupling end is parallel to the axial direction of the resonator.
Optionally, in the coupling structure of the band-stop characteristic communication front-end device component, the metal connection component is disposed between the resonator and an inner sidewall of the stopband coupling cavity, which is close to the coupling component; the direction of the metal connecting component is parallel to the inner side wall, close to the coupling component, of the stop band coupling cavity; and the direction of the metal connecting part is also perpendicular to the direction in which the coupling part extends from the main transmission rod to the resonator.
Optionally, in the coupling structure of a front end device component for band-stop characteristic communication, the metal connection component is made of copper, and the width, length, bending position and/or bending angle of the metal connection component are determined according to the electric resistance length and/or impedance of the coupling component, so as to compensate the electric resistance length and/or impedance of the coupling component to be matched with the stop band frequency corresponding to the stop band coupling cavity.
Optionally, in the coupling structure of the band-stop characteristic communication front-end equipment component, the communication front-end equipment component includes a band-stop filter or a band-stop combiner.
Advantageous effects
According to the invention, the impedance and the electrical length of the coupling component can be flexibly and effectively compensated by adjusting the width, the length, the bending position and/or the bending angle of the metal connecting component for connecting the stop band coupling cavity and the coupling component, so that the electrical performance of the band-stop filter is improved, and the design volume of the band-stop filter is reduced. The coupling structure can be widely used in communication front-end equipment components such as microwave band-stop filters or band-stop combiners.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, and do not limit the invention. In the drawings:
FIG. 1 is a schematic diagram of the overall structure of a band reject filter of the present invention;
FIG. 2 is a schematic cross-sectional view of the band reject filter of FIG. 1 in the direction A-A';
FIG. 3 is a schematic diagram of the internal coupling structure of the band reject filter of the present invention;
In the figure, 1 denotes a cavity; 2 represents a cover plate; 3 represents a cover plate mounting screw; 4 represents a nonmetallic support ring; 5 represents a nonmetallic screw; 6 represents a metal sheet; 7 represents a metal nut; 8 represents a metal tuning rod; 9 denotes a resonator; reference numeral 10 denotes a resonator fixing screw; 11 denotes a metal connection member; 12 denotes a metal fixing screw; 13 denotes a connector set screw; 14 denotes a connector.
Detailed Description
In order to make the purpose and technical solutions of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" in the present invention means that each exists alone or both exist.
The meaning of 'inner and outer' in the invention refers to that the direction pointing to the inner part of the cavity is inner relative to the cavity of the communication front-end equipment component with the characteristic of band elimination, and the direction pointing to the inner part of the cavity is outer; and not to a particular limitation of the mechanism of the device of the present invention.
"Connected" as used herein means either a direct connection between components or an indirect connection between components via other components.
The meaning of "up and down" in the present invention refers to the direction from the bottom of the cavity to the cover plate, i.e. the direction from the cover plate to the bottom of the cavity is up, and the direction from the cover plate to the bottom of the cavity is down, which is not a specific limitation of the device mechanism of the present invention.
Fig. 1 illustrates a microstrip filter as an example of a coupling structure, and a microstrip combiner is similar to the coupling structure provided by the present invention. The band reject filter includes: a main transmission rod arranged between the two connectors 14 of the communication front-end equipment and a coupling part fastened between the main transmission rod and the stop band coupling cavity. The structure is closed by the cavity 1 and the cover plate 2, a main transmission rod cavity is arranged in the closed area along the direction of the main transmission rod, and two stop band coupling cavities aiming at different frequencies are correspondingly arranged on the left side of the main transmission rod cavity in the view angle of fig. 1.
The band reject filter needs to be set to: the required frequency band signals cannot be passed through, or certain inhibition needs to be carried out on specific frequency band signals, and the passing of the other frequency band signals is ensured. First, to ensure that all signals can enter the filter, the filter is typically provided with a main transmission rod, i.e. a copper sheet between the two connectors as shown in fig. 1. The form of the main transmission rod of this copper sheet determines the passage of almost all signals. Then, to implement the band-stop filtering, it is necessary to add one single cavity to the side of the main transmission rod, that is, a stop-band coupling cavity corresponding to different frequencies, to couple with the main transmission rod. The frequencies of the single cavities determine the frequency of the stop band, and all signals related to the frequency in the whole pass band can be coupled out, so that the signals with the frequency are lost on the whole main transmission rod, and the effect of the stop band is achieved. In general, the distance between the single chambers corresponding to the main transmission rod, i.e. the electrical length between the two coupling parts extending into the single chambers, is required to be a quarter wavelength, but can also be an eighth wavelength, or even shorter. The wavelength here is related to the specifically required coupling stop band frequency. The shorter coupling component size can save the device volume and arrange the components in aspects. But there is no perfect sense of unity. The dimensions of the coupling elements are small and then the index is sacrificed. So that the index becomes worse when it becomes one eighth wavelength electric length or shorter. It is necessary to introduce some compensation at this time, namely the corresponding metal connecting part 11 in the present invention. Its length, i.e. its electrical length and impedance, is integrated into the corresponding part of the main transmission rod for compensation, thus achieving the performance requirements.
The coupling component comprises at least one coupling end and a fixed end, wherein the fixed end is connected with the main transmission rod, and the coupling end extends from the main transmission rod into the corresponding stop band coupling cavity. The fixed end of the coupling component is fastened to the cavity of the communication front-end equipment through a nonmetal screw 5; a metal connecting part 11 is arranged between the coupling part and the communication front-end equipment cavity and is used for adjusting the electric length and the impedance. In order to achieve a better coupling effect, in the structure of this embodiment, the coupling end of the coupling component may be designed as follows: the main transmission rod extends to the diameter direction of the resonator 9, the coupling end of the coupling component is also provided with a bend towards the bottom of the stop band coupling cavity at a position close to the resonator 9, and the bent coupling end is parallel to the axial direction of the resonator 9.
Unlike the prior art, since the present invention adds the metal connection part 11 and the metal fixing screw 12. The metal connecting component 11 is arranged in the stop band coupling cavity, extends from the bottom of the stop band coupling cavity to the side face of the coupling end of the coupling component, and is electrically connected with the coupling end of the coupling component, namely, the metal connecting component 11 and the metal sheet 6 are used for compensating the electric length and/or the impedance of the coupling component to be matched with the stop band frequency corresponding to the stop band coupling cavity.
Specifically, the metal connecting component 11 is disposed between the resonator 9 and the inner sidewall of the stop band coupling cavity near the coupling component. The metal connecting component 11 is fixed at the bottom of the stop band coupling cavity and is close to one side of the coupling component. The metal connecting part 11 may be provided with at least one bend, such that the direction of the metal connecting part 11 is parallel to the inner side wall of the stop band coupling cavity near the coupling part; and at the other end of the metal connecting part 11 the bending is such that its direction is also perpendicular to the direction in which the coupling part extends from the main transmission rod towards the resonator 9. The metal connecting component 11 is fixed on the side surface extending from the bottom of the stop band coupling cavity to the coupling end of the coupling component by a metal fixing screw 12, is electrically connected with the coupling end of the coupling component, and is used for compensating the electric length and/or the impedance of the coupling component to be matched with the stop band frequency corresponding to the stop band coupling cavity. Therefore, the range of the return loss variation of the performance index of the band-stop filter provided by the invention is enlarged, and the width, the length, the bending position and/or the bending angle of the metal connecting part 11 can be finely adjusted.
Further, one end of the metal connecting component 11 is electrically connected with the coupling component fastened on the cavity of the communication front-end equipment, the other end of the metal connecting component can be correspondingly arranged at different positions of the stop band coupling cavity according to the compensation requirement of the electrical length and/or the impedance, the electrical length is adjusted through the length of the metal connecting component 11, and the impedance is correspondingly adjusted through the thickness and the shape of the metal connecting component 11.
The invention is mainly characterized in that the length of the metal connecting part 11 connecting the cavity and the coupling part is adjusted, so that the impedance and the electrical length are flexibly and effectively changed, the electrical performance of the band-stop filter is improved, and the design volume of the band-stop filter is reduced.
Referring to fig. 2, the filter further includes a resonator 9 disposed in the stop band coupling cavity. The resonator 9 is of a hollow cylinder structure, and the lower side of the resonator 9 is fixed at the middle position of the bottom of the stop band coupling cavity through a resonator fixing screw 10.
A metal tuning rod 8 which is axially same with the resonator 9 and extends downwards from the cavity cover plate 2 is further arranged above the resonator. A similar metal tuning rod 8 structure can also be arranged above the main transmission rod. The metal tuning rod 8 is fixed on the cover plate 2 through a metal nut 7, and extends from the cover plate 2 vertically to the inside of the cavity 1 so as to adjust the resonance parameters of the device. The metal tuning rod 8 can be made of aluminum, copper, or other metal materials, and its structural parameters, such as specific location, length extending into the cavity, diameter of the metal tuning rod 8, etc., are specifically set according to the requirement of the device performance parameters through software simulation.
The metal connection part 11 in fig. 3 is specifically configured in different and varied structures according to the stop band frequencies corresponding to different stop band coupling cavities. For example, where a longer electrical length is required for adjustment, the metal connecting part 11 is lengthened a little, and where a thicker one is required if the impedance is to be made smaller. But at the same time, the added part also has an effect on the coupling, and the coupling component needs to be correspondingly adjusted. That is, the coupling between the main transmission line formed by the strip copper sheet between the two connectors 14 and the single metal cavity of the present invention is changed by adding a section of the metal connecting component 11 of the present invention, and specific parameters thereof need to be adjusted correspondingly according to device indexes.
The more recent and less recent structures, which are also directly related to the length of the component 11, i.e. the electrical length and/or impedance of the coupling component, are also related to the other structures within the device.
In the implementation shown in fig. 3, the metal connection component 11 is fixed at the bottom of the stop band coupling cavity, near one side of the coupling component; the metal connection part 11 is provided with at least one bend, and extends upward from a position fixed by the metal fixing screw 12 to be electrically connected with the coupling end of the coupling part. And the fixed end of the coupling component is fixed on the outer side of the stop band coupling cavity through an insulating fixing component. The insulating fixture assembly comprises a non-metallic support ring 4 and a non-metallic screw 5. In a specific implementation manner, the non-metal support ring 4 is arranged at the bottom of the cavity where the main transmission rod is located, and the inner diameter of the non-metal support ring 4 is matched with the thread diameter of the non-metal screw 5; the fixed end of the coupling part is provided with a through hole for fixing the nonmetal screw 5; the nonmetal screw 5 passes through the through hole to fix the stiff end of the coupling part on the upper surface of the nonmetal support ring 4, and the height of the nonmetal support ring 4 can at least support the coupling part not to contact with the inner wall of the stop band coupling cavity or the cavity where the main transmission rod is located all the time. The metal connection member 11 may be selected from copper.
Therefore, the invention solves the problems of electric length and impedance compensation of the band-stop filter by adjusting the width, length, bending position and/or bending angle of the metal connecting part 11 to carry out fine adjustment of electric length and impedance. The structure is easy to realize, good in consistency of performance parameters, easy to process and low in cost.
The foregoing is a description of embodiments of the invention, which are specific and detailed, but are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (7)
1. A coupling structure for a band-stop characteristic communication front-end equipment component, comprising:
the main transmission rod is used for transmitting microwave signals;
The coupling component comprises at least one fixed end and a coupling end, the fixed end is connected with the main transmission rod, and the coupling end extends from the main transmission rod into the corresponding stop band coupling cavity;
The metal connecting component (11) is arranged in the stop band coupling cavity, extends from the bottom of the stop band coupling cavity to the side face of the coupling end of the coupling component and is used for compensating the electric length and/or the impedance of the coupling component to match with the stop band frequency corresponding to the stop band coupling cavity;
The metal connecting component (11) is electrically connected with the coupling end of the coupling component;
the fixed end of the coupling component is fixed on the outer side of the stop band coupling cavity through an insulating fixing component.
2. The coupling structure of the band-stop characteristic communication front-end equipment component according to claim 1, wherein the metal connecting component (11) is fixed at the bottom of the stop band coupling cavity, near one side of the coupling component;
The metal connecting part (11) is provided with at least one bending part, and the position fixed by the metal fixing screw (12) extends upwards to be electrically connected with the coupling end of the coupling part.
3. The coupling structure of the band-stop characteristic communication front-end equipment component according to claim 1, wherein the insulating fixing component comprises a nonmetallic support ring (4) and a nonmetallic screw (5);
The nonmetallic support ring (4) is arranged at the bottom of the cavity where the main transmission rod is positioned, and the inner diameter of the nonmetallic support ring (4) is matched with the thread diameter of the nonmetallic screw (5);
the fixed end of the coupling component is provided with a through hole for fixing the nonmetal screw (5);
The nonmetal screw (5) passes through the through hole to fix the fixed end of the coupling part on the upper surface of the nonmetal support ring (4), and the height of the nonmetal support ring (4) can at least support the coupling part not to contact with the inner wall of the stop band coupling cavity or the cavity where the main transmission rod is positioned all the time.
4. A coupling structure of a band-stop characteristic communication front-end equipment component according to any one of claims 1 to 3, wherein a resonator (9) is further arranged in the band-stop coupling cavity, the resonator (9) is of a hollow cylindrical structure, and the lower side of the resonator (9) is fixed at the bottom middle position of the band-stop coupling cavity through a resonator fixing screw (10);
The coupling end of the coupling component extends from the main transmission rod to the diameter direction of the resonator (9), the coupling end of the coupling component is also provided with a bend towards the bottom of the stop band coupling cavity at a position close to the resonator (9), and the bent coupling end is parallel to the axial direction of the resonator (9).
5. The coupling structure of the band-stop characteristic communication front-end equipment component according to claim 4, wherein the metal connection component (11) is disposed between a resonator (9) and an inner sidewall of the stopband coupling cavity proximate to the coupling component;
The direction of the metal connecting component (11) is parallel to the inner side wall, close to the coupling component, of the stop band coupling cavity; and the direction of the metal connecting part (11) is also perpendicular to the direction in which the coupling part extends from the main transmission rod to the resonator (9).
6. The coupling structure of a band-stop characteristic communication front-end equipment component according to claim 5, wherein the metal connection component (11) is made of copper, and the width, length, bending position and/or bending angle of the metal connection component (11) are determined according to the electrical length and/or impedance of the coupling component, so as to compensate the electrical length and/or impedance of the coupling component to match with the stop band frequency corresponding to the stop band coupling cavity.
7. The coupling structure of band-stop characteristics communication front-end equipment component of claim 6, wherein the communication front-end equipment component comprises a band-stop filter or a band-stop combiner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910135549.4A CN109713413B (en) | 2019-02-25 | 2019-02-25 | Coupling structure of band-stop characteristic communication front-end equipment component |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910135549.4A CN109713413B (en) | 2019-02-25 | 2019-02-25 | Coupling structure of band-stop characteristic communication front-end equipment component |
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| CN109713413A CN109713413A (en) | 2019-05-03 |
| CN109713413B true CN109713413B (en) | 2024-05-10 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847767A (en) * | 2010-05-27 | 2010-09-29 | 摩比天线技术（深圳）有限公司 | Band elimination filter, manufacturing method of band elimination filter and filtering device |
| CN106602191A (en) * | 2016-12-14 | 2017-04-26 | 京信通信技术(广州)有限公司 | High-performance band-stop filter and the communication cavity component thereof |
| CN207368186U (en) * | 2017-10-17 | 2018-05-15 | 深圳市大富科技股份有限公司 | A kind of bandstop filter and communication equipment |
| CN208062226U (en) * | 2018-04-08 | 2018-11-06 | 宁波华瓷通信技术有限公司 | A kind of bandstop filter |
| CN209418738U (en) * | 2019-02-25 | 2019-09-20 | 江苏贝孚德通讯科技股份有限公司 | A kind of coupled structure of band-stop response communication headend equipment component |
-
2019
- 2019-02-25 CN CN201910135549.4A patent/CN109713413B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847767A (en) * | 2010-05-27 | 2010-09-29 | 摩比天线技术（深圳）有限公司 | Band elimination filter, manufacturing method of band elimination filter and filtering device |
| CN106602191A (en) * | 2016-12-14 | 2017-04-26 | 京信通信技术(广州)有限公司 | High-performance band-stop filter and the communication cavity component thereof |
| CN207368186U (en) * | 2017-10-17 | 2018-05-15 | 深圳市大富科技股份有限公司 | A kind of bandstop filter and communication equipment |
| CN208062226U (en) * | 2018-04-08 | 2018-11-06 | 宁波华瓷通信技术有限公司 | A kind of bandstop filter |
| CN209418738U (en) * | 2019-02-25 | 2019-09-20 | 江苏贝孚德通讯科技股份有限公司 | A kind of coupled structure of band-stop response communication headend equipment component |
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