CN211182461U - Film inductive coupling filter - Google Patents
Film inductive coupling filter Download PDFInfo
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- CN211182461U CN211182461U CN201922467840.XU CN201922467840U CN211182461U CN 211182461 U CN211182461 U CN 211182461U CN 201922467840 U CN201922467840 U CN 201922467840U CN 211182461 U CN211182461 U CN 211182461U
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- right body
- left body
- inductive coupling
- coupling
- thin film
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Abstract
The utility model provides a pair of film perceptual coupling filter, including left body and the right body of mutual amalgamation, the coupling recess has all been seted up to the medial surface that left side body and right body were laminated mutually, just the coupling recess runs through left side body with the last side and the downside of right side body. The utility model discloses can realize littleer coupling volume, solve the problem that the unable processing of the very little coupling volume of conventional weak coupling mode is realizing, finally realize the wave filter of super narrow bandwidth.
Description
Technical Field
The utility model belongs to the technical field of the wave filter and specifically relates to a film perceptual coupling wave filter is related to.
Background
With the rapid development of wireless communication technology, the electronic industry has higher and higher requirements for miniaturization of electronic devices, and wireless communication products are developed in the directions of being short, small, light, thin and the like; the frequency spectrum resource is more and more scarce, which causes the system to have higher requirement on inhibition when processing signals.
In the existing filters, generally, a medium-bandwidth filter and a wide-bandwidth filter are easily realized by adopting a cavity filter, and a medium filter with a high Q value is adopted for realizing a narrow bandwidth. In order to realize weak coupling, that is, to realize an ultra-narrow bandwidth, a groove is often formed on an open-circuit surface of a dielectric filter, but when the coupling quantity is required to be small, a conventional slotting mode cannot be achieved.
Disclosure of Invention
In order to solve the above problem, the present invention provides a thin film inductive coupling filter.
The main contents of the utility model include:
a film inductive coupling filter comprises a left body and a right body, wherein the left body and the right body are of cuboid structures, tuning through holes are formed in the centers of the front end face of the left body and the front end face of the right body, and coupling grooves are formed in the inner side faces, facing each other, of the left body and the right body; the coupling groove penetrates from the upper side surface to the lower side surface of the left body and the right body; the upper side surfaces of the left body and the right body are respectively provided with an input/output terminal at one side close to the corresponding front end surface and the outer side surface; the front end faces of the left body and the right body are open road faces, and the outer side faces and the inner side faces of the left body and the right body, the upper side faces, the lower side faces and the rear end faces of the left body and the right body, and the inner walls of the tuning through holes are coated with conducting films; and the bottom of the coupling groove and the wall of the groove are free of conductive films.
Preferably, the upper side surfaces of the left body and the right body are provided with a spacing groove near the corresponding front end surface and the outer side surface, the spacing groove is free of conductive film, the spacing groove divides the upper side surface into a transceiving area, and the transceiving area forms the input/output terminal.
Preferably, the spacing groove is shaped L.
Preferably, the coupling groove is opened at a front side of inner side surfaces of the left and right bodies.
Preferably, the conductive film is made of a metal material.
Preferably, the metal material is silver or copper.
Preferably, the left body and the right body are made of ceramic.
Preferably, the left body and the right body are spliced in a welding mode.
The beneficial effects of the utility model reside in that: the utility model provides a pair of film perceptual coupling filter offers the coupling recess through the side that faces each other at two film monomers for form the weak coupling structure who runs through side and downside above that after two film monomers laminating, thereby can realize littleer coupling capacity, solve the problem that conventional weak coupling mode is realizing the unable processing of very little coupling capacity, finally realize super narrow bandwidth's wave filter.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of an angle of the left and right bodies.
Detailed Description
The technical solution protected by the present invention will be specifically described below with reference to the accompanying drawings.
Please refer to fig. 1 to 2. The utility model provides a film inductive coupling filter, which comprises a left body 10 and a right body 20, wherein the left body 10 and the right body 20 are cuboid structures, a tuning through hole 100 is arranged at the center of the front end surface 11 of the left body 10 and the front end surface of the right body 20, and a coupling groove 30 is arranged on the inner side surfaces of the left body 10 and the right body 20 facing each other; the coupling groove 30 is penetrated from the upper side 12 to the lower side of the left body 10 and the right body 20; when the left body 10 and the right body 20 are attached, the two coupling grooves 30 enclose a space structure with two open ends and are formed on the upper side and the lower side of the filter, so that the inductive weak coupling can be realized.
In one embodiment, the coupling groove 30 is opened at the front side of the inner side surfaces 14 of the left and right bodies 10 and 20; the left body 10 and the right body 20 are made of ceramic, the left body 10 and the right body 20 are spliced in a welding mode, and when machining is conducted, the coupling grooves 30 are formed in the inner side faces 14, facing to each other, of the left body 10 and the right body 20 respectively, and then the left body 10 and the right body 20 are welded and spliced, so that the difficulty in forming the grooves is reduced on the premise of achieving weak coupling.
Specifically, the upper side surfaces 12 of the left body 10 and the right body 20 are respectively provided with input and output terminals 200 near the sides corresponding to the front end surface 11 and the outer side surface 13; the front end surfaces 11 of the left body 10 and the right body 20 are open surfaces, and the outer side surfaces 13, the inner side surfaces 14, the upper side surfaces 12, the lower side surfaces and the rear end surfaces of the left body 10 and the right body 20, and the inner walls of the tuning through holes 100 are coated with conductive films; meanwhile, there is no conductive film at the bottom of the coupling groove 30 and at the walls of the groove.
In one embodiment, the conductive film is made of metal; preferably, the metal material is silver or copper.
In one embodiment, a spacing groove 120 is formed on a side of the upper side surface 12 of the left body 10 and the right body 20 close to the corresponding front end surface 11 and the outer side surface 13, no conductive film is disposed in the spacing groove 120, the spacing groove 120 divides the upper side surface 12 into a transceiving area, and the transceiving area forms the input/output terminal 200, wherein the spacing groove 120 is shaped like L.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (8)
1. A film inductive coupling filter is characterized by comprising a left body and a right body, wherein the left body and the right body are of cuboid structures, tuning through holes are formed in the centers of the front end face of the left body and the front end face of the right body, and coupling grooves are formed in the inner side faces of the left body and the right body, which face each other; the coupling groove penetrates from the upper side surface to the lower side surface of the left body and the right body; the upper side surfaces of the left body and the right body are respectively provided with an input/output terminal at one side close to the corresponding front end surface and the outer side surface; the front end faces of the left body and the right body are open road faces, and the outer side faces and the inner side faces of the left body and the right body, the upper side faces, the lower side faces and the rear end faces of the left body and the right body, and the inner walls of the tuning through holes are coated with conducting films; and the bottom of the coupling groove and the wall of the groove are free of conductive films.
2. The thin film inductive coupling filter of claim 1, wherein the upper side surfaces of the left body and the right body are provided with a spacing groove near the corresponding front end surface and the outer side surface, the spacing groove is free of conductive film, the spacing groove divides the upper side surface into a transceiving region, and the transceiving region constitutes the input/output terminal.
3. The thin film inductive coupling filter of claim 2, wherein said spacing grooves are shaped as L.
4. The thin film inductive coupling filter of claim 1, wherein the coupling grooves are opened on the front side of the inner side surfaces of the left and right bodies.
5. The thin film inductive coupling filter according to any of claims 1 to 4, wherein the conductive film is made of metal.
6. The thin film inductive coupling filter of claim 5, wherein said metal material is silver or copper.
7. The thin film inductive coupling filter according to any of claims 1 to 4, wherein the left body and the right body are made of ceramic.
8. The thin film inductive coupling filter of claim 7, wherein said left body and said right body are spliced by welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922467840.XU CN211182461U (en) | 2019-12-31 | 2019-12-31 | Film inductive coupling filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922467840.XU CN211182461U (en) | 2019-12-31 | 2019-12-31 | Film inductive coupling filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211182461U true CN211182461U (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922467840.XU Active CN211182461U (en) | 2019-12-31 | 2019-12-31 | Film inductive coupling filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211182461U (en) |
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2019
- 2019-12-31 CN CN201922467840.XU patent/CN211182461U/en active Active
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