CN110534857B - Adjustable capacitive coupling structure - Google Patents
Adjustable capacitive coupling structure Download PDFInfo
- Publication number
- CN110534857B CN110534857B CN201910682870.4A CN201910682870A CN110534857B CN 110534857 B CN110534857 B CN 110534857B CN 201910682870 A CN201910682870 A CN 201910682870A CN 110534857 B CN110534857 B CN 110534857B
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- capacitive coupling
- cavity
- copper sheet
- wall
- capacitive
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- 230000008878 coupling Effects 0.000 title claims abstract description 126
- 238000010168 coupling process Methods 0.000 title claims abstract description 126
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 126
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052802 copper Inorganic materials 0.000 claims abstract description 37
- 239000010949 copper Substances 0.000 claims abstract description 37
- 238000005192 partition Methods 0.000 claims abstract description 12
- 238000002955 isolation Methods 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 230000001939 inductive effect Effects 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 230000005672 electromagnetic field Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
-
- 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
Abstract
The invention discloses an adjustable capacitive coupling structure, which comprises a cavity; the cover plate also comprises a separation wall which is arranged in the cavity, and the cavity is divided into a plurality of resonant cavities by the separation wall; the resonant rod is arranged in the resonant cavity; a slot hole formed in the partition wall and having a capacitive coupling component; according to the adjustable capacitive coupling structure, the length of the adjusting screw at the bottom of the cavity is adjusted to be screwed into the tuning cavity, the distance between the capacitive coupling component and the capacitive coupling tuning screw is adjusted, the height of the isolation wall is adjusted, the depth of the I-shaped groove of the capacitive coupling resonator is combined with the depth of the tuning screw, the functions of fine adjustment and coarse adjustment of the capacitive coupling strength are achieved, the adjustment range of the capacitive coupling strength is improved, the adjustment of the cover plate is avoided, the adjustment difficulty of the whole filter is reduced, the adjustment time is shortened, the assembly of the capacitive coupling copper sheet is achieved through the matching of the medium screw and the slotted hole, the connection reliability is high, and the use is convenient.
Description
Technical Field
The invention relates to an adjustable capacitive coupling structure, and belongs to the technical field of wireless communication.
Background
With the continuous development of communication technology, communication frequency resources are more and more tensioned, more and more severe requirements are put on loss and out-of-band rejection of filters, more and more filters have higher near-end rejection requirements outside passband 5MHz, 3MHz, 2MHz and even 1.5MHz, and then a plurality of transmission zeros are needed to meet the requirements. When these transmission zeroes are at the low end of the passband, we are generally implemented by a capacitive coupling structure.
At present, the dumbbell-shaped capacitive coupling structure with the probe structure is widely applied to the filter due to the characteristics of easy manufacture and convenient processing, however, when a plurality of zero points of the filter are at the low end of the passband and are close to the passband, the size of the capacitive coupling structure is sensitive to the zero point strength; in the actual production process, due to machining tolerance and artificial assembly error, the distance between the capacitive coupling structure and the resonant rod is inevitably deviated, and finally the strength of the capacitive coupling structure is difficult to control.
Due to the deviation of the size of the capacitive coupling structure, various problems are brought to the mass production of the filter, and the problems are specifically expressed in: when the performance index of the filter can meet the requirement, the debugging difficulty of the whole filter is increased due to the critical index, so that the debugging time is prolonged, and the labor cost is finally increased; when the performance index of the filter does not meet the requirement, the capacitive coupling structure needs to be enhanced or weakened to a certain extent, so that the complete machine of the filter needs to be disassembled to replace the capacitive coupling structures with different sizes, and finally the complete machine is reassembled and debugged, and the production cost of the filter is greatly increased due to reworking of the complete machine.
Therefore, the adjustment of the capacitive coupling structure is very important, and at present, the adjustment of the capacitive coupling structure is generally realized by moving a supporting structure thereof and then moving the capacitive coupling structure, but the mode needs to open a filter cover plate, which is time-consuming and labor-consuming, and has limited adjustable range and is not easy to control.
Disclosure of Invention
In order to solve the above-mentioned problems, the present invention provides an adjustable capacitive coupling structure.
The adjustable capacitive coupling structure of the invention comprises
A cavity;
the cover plate is detachably connected to the top of the cavity;
and also comprises
The separation wall is arranged in the cavity, and the cavity is divided into a plurality of resonant cavities by the separation wall;
the resonant rod is arranged in the resonant cavity and is fixedly connected to the inner wall of the bottom of the cavity;
a slot hole formed on the partition wall
Capacitive coupling assembly: the capacitive coupling copper sheet and the capacitive support piece are connected to the top of the isolation wall through the medium screw, and two ends of the capacitive coupling copper sheet are respectively arranged in two resonant cavities to be coupled;
the capacitive coupling resonator is provided with an I-shaped groove and is connected to the middle top of the capacitive coupling copper sheet through a medium screw rod penetrating through the I-shaped groove;
the tuning screw is arranged in the resonant cavity needing capacitive coupling, is connected to the cover plate and is arranged above the I-shaped groove opening formed in the capacitive coupling resonator.
Further, the outer side wall of the cavity is also connected with an input port coupling copper sheet and an output port coupling copper sheet, and the input port coupling copper sheet and the output port coupling copper sheet are connected with the resonant rod through screws.
Further, the capacitive support is of a ring-shaped structure.
Further, the capacitive support is made of an insulating material.
Further, the capacitive support is in threaded connection with the outer wall of the dielectric screw.
Further, an indwelling groove is formed in one end, close to the cover plate, of the resonant rod, and an inductive coupling screw connected to the cover plate is arranged above the notch of the indwelling groove.
Further, the bottom sliding connection of division wall has the mount pad, the spout has been seted up on the mount pad, division wall sliding connection is in the spout, the bottom threaded connection of cavity has the adjusting screw who passes the mount pad to the inside extension of spout, and extends the end and rotate with the bottom of division wall and link to each other.
Further, the outer side wall of the isolation wall is also connected with a limiting block arranged in the chute.
Compared with the prior art, the adjustable capacitive coupling structure has the advantages that the capacitive coupling tuning screw is additionally arranged beside the capacitive coupling component, the capacitive coupling tuning screw is screwed into the H-shaped groove of the capacitive coupling resonator to a depth, the electromagnetic field near the capacitive coupling component generates perturbation, the electromagnetic field distribution near the capacitive coupling component is slightly changed, and therefore fine adjustment of the capacitive coupling strength is achieved.
The adjusting screw at the bottom of the cavity is adjusted to screw into the length of the tuning cavity, the distance between the capacitive coupling assembly and the capacitive coupling tuning screw is adjusted, the height of the isolation wall is adjusted, the adjusting range of the capacitive coupling strength is improved, the cover plate is prevented from being disassembled for debugging, and therefore the debugging difficulty of the whole filter is reduced, and the debugging time is shortened.
The dielectric screw is matched with the slotted hole, so that the assembly of the capacitive coupling copper sheet is realized, the connection reliability is high, and the use is convenient.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
FIG. 2 is a second schematic diagram of the structure of the present invention.
Fig. 3 is a top view of the present invention.
Fig. 4 is a schematic view of the internal structure of the present invention.
FIG. 5 is a third schematic diagram of the structure of the present invention.
FIG. 6 is a schematic diagram of a fourth embodiment of the present invention.
The components in the drawings are marked as follows: 1. a cavity; 2. a cover plate; 3. a partition wall; 4. a resonant rod; 5. a slot hole; 6. a capacitive coupling assembly; 61. a capacitive coupling copper sheet; 62. a capacitive support; 63. a media screw; 7. a capacitively coupled resonator; 8. i-shaped grooves; 9. a tuning screw; 10. the input port is coupled with the copper sheet; 11. the output port is coupled with the copper sheet; 12. a retention groove; 13. an inductive coupling screw; 14. a mounting base; 15. a chute; 16. adjusting a screw; 17. and a limiting block.
Detailed Description
Example 1:
an adjustable capacitive coupling structure as shown in fig. 1-5, comprising
A cavity 1;
the cover plate 2 is detachably connected to the top of the cavity 1;
and also comprises
A partition wall 3 disposed in the cavity 1, and the cavity 1 is partitioned into a plurality of resonant cavities by the partition wall 3;
the resonant rod 4 is arranged in the resonant cavity and is fixedly connected to the inner wall of the bottom of the cavity 1;
a slot 5 formed on the partition wall 3
Capacitive coupling assembly 6: the capacitive coupling copper sheet 61 and the capacitive support 62 are connected to the top of the isolation wall 3 through the dielectric screw 63, and two ends of the capacitive coupling copper sheet 61 are respectively arranged in two resonant cavities to be coupled;
the capacitive coupling resonator 7, the capacitive coupling resonator 7 is provided with an I-shaped groove 8, and the capacitive coupling resonator 7 is connected to the middle top of the capacitive coupling copper sheet 61 through a medium screw 63 penetrating through the I-shaped groove 8;
the tuning screw 9 is arranged in the resonant cavity needing capacitive coupling, is connected to the cover plate 2, and is arranged above the notch of the I-shaped groove 8 formed in the capacitive coupling resonator 7.
The outer side wall of the cavity body 1 is also connected with an input port coupling copper sheet 10 and an output port coupling copper sheet 11, and the input port coupling copper sheet 10 and the output port coupling copper sheet 11 are connected with the resonant rod 4 through screws.
The capacitive support 62 is a ring-like structure.
The capacitive support 62 is made of an insulating material.
The capacitor support 62 is screwed on the outer wall of the medium screw 63.
An indwelling groove 12 is formed in one end, close to the cover plate 2, of the resonant rod 4, and an inductive coupling screw 13 connected to the cover plate 2 is arranged above the notch of the indwelling groove 12.
The capacitive coupling tuning screw 9 is additionally arranged beside the capacitive coupling assembly 6, the capacitive coupling tuning screw 9 is screwed into the depth of the I-shaped groove 8 of the capacitive coupling resonator 7, the electromagnetic field near the capacitive coupling assembly 6 generates perturbation, the electromagnetic field distribution near the capacitive coupling assembly 6 is slightly changed, so that fine adjustment of the capacitive coupling strength is realized, the assembly of the capacitive coupling copper sheet 61 is realized through the matching of the dielectric screw 63 and the slotted hole 5, the connection reliability is high, and the use is convenient.
Example 2:
an adjustable capacitive coupling structure as shown in fig. 1-6, comprising
A cavity 1;
the cover plate 2 is detachably connected to the top of the cavity 1;
and also comprises
A partition wall 3 disposed in the cavity 1, and the cavity 1 is partitioned into a plurality of resonant cavities by the partition wall 3;
the resonant rod 4 is arranged in the resonant cavity and is fixedly connected to the inner wall of the bottom of the cavity 1;
a slot 5 formed on the partition wall 3
Capacitive coupling assembly 6: the capacitive coupling copper sheet 61 and the capacitive support 62 are connected to the top of the isolation wall 3 through the dielectric screw 63, and two ends of the capacitive coupling copper sheet 61 are respectively arranged in two resonant cavities to be coupled;
the capacitive coupling resonator 7, the capacitive coupling resonator 7 is provided with an I-shaped groove 8, and the capacitive coupling resonator 7 is connected to the middle top of the capacitive coupling copper sheet 61 through a medium screw 63 penetrating through the I-shaped groove 8;
the tuning screw 9 is arranged in the resonant cavity needing capacitive coupling, is connected to the cover plate 2, and is arranged above the notch of the I-shaped groove 8 formed in the capacitive coupling resonator 7.
The outer side wall of the cavity body 1 is also connected with an input port coupling copper sheet 10 and an output port coupling copper sheet 11, and the input port coupling copper sheet 10 and the output port coupling copper sheet 11 are connected with the resonant rod 4 through screws.
The capacitive support 62 is a ring-like structure.
The capacitive support 62 is made of an insulating material.
The capacitor support 62 is screwed on the outer wall of the medium screw 63.
An indwelling groove 12 is formed in one end, close to the cover plate 2, of the resonant rod 4, and an inductive coupling screw 13 connected to the cover plate 2 is arranged above the notch of the indwelling groove 12.
The bottom sliding connection of division wall 3 has mount pad 14, has seted up spout 15 on the mount pad 14, and division wall 3 sliding connection is in spout 15, and the bottom threaded connection of cavity 1 has the adjusting screw 16 that passes mount pad 14 to the inside extension of spout 15, and the extension end rotates with the bottom of division wall 3 and links to each other.
The outer side wall of the partition wall 3 is also connected with a limiting block 17 arranged in the chute 15.
The capacitive coupling tuning screw 9 is additionally arranged beside the capacitive coupling component 6, the capacitive coupling tuning screw 9 is screwed into the depth of the I-shaped groove 8 of the capacitive coupling resonator 7, the electromagnetic field near the capacitive coupling component 6 generates perturbation, the electromagnetic field distribution near the capacitive coupling component 6 is slightly changed, so that fine adjustment of the capacitive coupling strength is realized, the distance between the capacitive coupling component 6 and the capacitive coupling tuning screw 9 is adjusted by adjusting the length of the adjusting screw 16 screwed into the tuning cavity at the bottom of the cavity 1, the height of the isolation wall 3 is adjusted, the adjusting range of the capacitive coupling strength is improved, the disassembly of the cover plate 2 is avoided for debugging, the debugging difficulty of the whole filter is reduced, the debugging time is shortened, the assembly of the capacitive coupling copper sheet 61 is realized by matching the medium screw 63 with the groove hole 5, the connection reliability is high, and the use is convenient.
The above embodiments are merely preferred embodiments of the present invention, and all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the invention are therefore intended to be embraced therein.
Claims (6)
1. An adjustable capacitive coupling structure comprising
A cavity (1);
the cover plate (2) is detachably connected to the top of the cavity (1);
the method is characterized in that: and also comprises
The separation wall (3) is arranged in the cavity (1), and the cavity (1) is divided into a plurality of resonant cavities through the separation wall (3);
the resonant rod (4) is arranged in the resonant cavity and is fixedly connected to the inner wall of the bottom of the cavity (1);
a slot (5) which is arranged on the partition wall (3);
capacitive coupling assembly (6): the capacitive coupling copper sheet (61), a capacitive support piece (62) and a medium screw rod (63), wherein the medium screw rod (63) is connected in a slotted hole (5), grooves matched with the medium screw rod (63) are formed in the capacitive coupling copper sheet (61) and the capacitive support piece (62), the capacitive coupling copper sheet (61) and the capacitive support piece (62) are connected to the top of a separation wall (3) through the medium screw rod (63), and two ends of the capacitive coupling copper sheet (61) are respectively arranged in two resonant cavities to be coupled;
the capacitive coupling resonator (7), the I-shaped groove (8) is formed in the capacitive coupling resonator (7), and the capacitive coupling resonator (7) is connected to the middle top of the capacitive coupling copper sheet (61) through a medium screw rod (63) penetrating through the I-shaped groove (8);
the tuning screw (9) is arranged in the resonant cavity needing capacitive coupling and connected to the cover plate (2), and is arranged above the notch of the I-shaped groove (8) formed in the capacitive coupling resonator (7);
the bottom of the isolation wall (3) is connected with a mounting seat (14) in a sliding manner, a sliding groove (15) is formed in the mounting seat (14), the isolation wall (3) is connected in the sliding groove (15) in a sliding manner, an adjusting screw (16) extending towards the inside of the sliding groove (15) through the mounting seat (14) is connected with the bottom of the cavity (1) in a threaded manner, and the extending end of the adjusting screw is rotationally connected with the bottom of the isolation wall (3);
the outer side wall of the partition wall (3) is also connected with a limiting block (17) arranged in the chute (15);
the adjusting screw (16) at the bottom of the adjusting cavity (1) is screwed into the length of the tuning cavity, the distance between the capacitive coupling component (6) and the capacitive coupling tuning screw (9) is adjusted, the height of the isolation wall (3) is adjusted, and the adjusting range of the capacitive coupling strength is improved.
2. The adjustable capacitive coupling structure of claim 1, wherein: the outer side wall of the cavity (1) is also connected with an input port coupling copper sheet (10) and an output port coupling copper sheet (11), and the input port coupling copper sheet (10) and the output port coupling copper sheet (11) are connected with the resonant rod (4) through screws.
3. The adjustable capacitive coupling structure of claim 2, wherein: the capacitive support (62) is of annular configuration.
4. The adjustable capacitive coupling structure of claim 3, wherein: the capacitive support (62) is made of an insulating material.
5. The adjustable capacitive coupling structure of any one of claims 2-4, wherein: the capacitor support piece (62) is connected to the outer wall of the medium screw rod (63) in a threaded mode.
6. The adjustable capacitive coupling structure of claim 1, wherein: an indwelling groove (12) is formed in one end, close to the cover plate (2), of the resonant rod (4), and an inductive coupling screw (13) connected to the cover plate (2) is arranged above the notch of the indwelling groove (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910682870.4A CN110534857B (en) | 2019-07-26 | 2019-07-26 | Adjustable capacitive coupling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910682870.4A CN110534857B (en) | 2019-07-26 | 2019-07-26 | Adjustable capacitive coupling structure |
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| Publication Number | Publication Date |
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| CN110534857A CN110534857A (en) | 2019-12-03 |
| CN110534857B true CN110534857B (en) | 2024-04-16 |
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| CN201910682870.4A Active CN110534857B (en) | 2019-07-26 | 2019-07-26 | Adjustable capacitive coupling structure |
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