CN210074108U - Surface-mounted dielectric filter with through hole type input/output structure - Google Patents
Surface-mounted dielectric filter with through hole type input/output structure Download PDFInfo
- Publication number
- CN210074108U CN210074108U CN201920803134.5U CN201920803134U CN210074108U CN 210074108 U CN210074108 U CN 210074108U CN 201920803134 U CN201920803134 U CN 201920803134U CN 210074108 U CN210074108 U CN 210074108U
- Authority
- CN
- China
- Prior art keywords
- input
- output
- filter
- coupling
- dielectric filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The application discloses surface-mounted dielectric filter who contains pass-through input/output structure, including two bodies of making by solid-state dielectric material, these two the body piles up the combination and forms the filter main part, the cladding of body surface has the conducting layer, the filter main part is formed with input/output through-hole or blind hole along the perpendicular to face direction of piling up, input/output through-hole or blind hole surface are formed with the conducting layer, input/output through-hole or blind hole in the body surface surrounds respectively in the isolation tank, the isolation tank surface does not have the conducting layer, the isolation tank to filter main part installation face extends and the installation face forms the input/output pad. The utility model discloses the advantage lies in having overcome current waveguide filter volume great, has used the problem of jointing equipment occupation space.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a surface-mounted dielectric filter having a via-hole type input/output structure.
Background
The dielectric waveguide filter is formed by directly metallizing all surfaces of a dielectric material, so that energy can be bound in a medium instead of directly radiating the energy into the whole space like an antenna, and the loss in the energy transmission process can be greatly reduced.
The dielectric waveguide adopts dielectric ceramic as a filling medium, and the higher the dielectric constant of a dielectric material is, the smaller the volume of the dielectric waveguide is under the same resonant frequency. And when the volume is smaller under the condition of the same dielectric constant, a metalized blind hole needs to be arranged on one side of the dielectric waveguide, the dielectric waveguide filter forms a capacitor with a silver layer on the other side through the blind hole, and an inductor is formed on the side wall of the blind hole to resonate, so that the frequency is reduced, and the volume of the dielectric waveguide is further reduced.
In addition, in patent CN 104871364 a filed by 26/8/2015, n.gahara et al, multiple dielectric bodies are spliced together in a stacked manner to achieve the purpose of reducing the overall size, but this method makes the hole type input/output of the filter no longer located at the bottom of the filter, so that after the filter is mounted in a communication system, cables and other forms are still needed to lead the signal of the filter to the circuit board of the communication system, which is not favorable for system miniaturization and system integration.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a surface mounted dielectric filter who contains through-hole type input/output structure to it is great to overcome current waveguide filter volume, uses jointing equipment occupation space's problem.
In order to achieve the above object, the present invention provides the following technical solutions.
The embodiment of the application discloses surface-mounted dielectric filter who contains through-hole type input/output structure, including two bodies of making by solid-state dielectric material, these two the body piles up the combination and forms the filter main part, the cladding of body surface has the conducting layer, the filter main part is formed with input/output through-hole or blind hole along the perpendicular to face direction of piling up, input/output through-hole or blind hole surface are formed with the conducting layer, input/output through-hole or blind hole in the body surface surrounds respectively in the isolation tank, the isolation tank surface does not have the conducting layer, the isolation tank to filter main part installation face extends and the installation face forms the input/output pad.
Preferably, in the surface-mount dielectric filter with a through-hole type input/output structure, the two bodies respectively have a plurality of resonators arranged on the back of the stacking surface, a frequency-modulated blind hole is formed in the center of each resonator, two adjacent resonators are separated by a coupling device, a signal transmission window is formed on the stacking surface of each body, and no conductive layer is formed on the surface of each signal transmission window.
More preferably, in the surface-mount dielectric filter having a via-hole type input/output structure described above, 2 or more resonators are formed for each of the bodies.
More preferably, in the surface-mount dielectric filter having the through-hole type input/output structure, one frequency-modulated blind hole is formed in each of the resonators.
More preferably, in the surface-mount dielectric filter having the via-type input/output structure, the coupling device includes a coupling via or a coupling rectangular groove, the coupling via or the coupling rectangular groove is perpendicular to the stacking surface, and a conductive layer is formed on a surface of the coupling via or the coupling rectangular groove.
Preferably, in the surface-mount dielectric filter having a through-hole input/output structure, the solid dielectric material is ceramic or quartz glass.
Preferably, in the surface-mount dielectric filter having a via-hole input/output structure, the conductive layer is made of silver or copper.
Compared with the prior art, the utility model has the advantages that the volume of the dielectric waveguide filter is reduced by adopting a stacking mode, and the volume can be further reduced by arranging the blind hole in the center of the resonator; the isolation groove and the formed transmission line are formed on the surface of the body through the input/output through hole or the blind hole, the bonding pad can be formed at the bottom of the dielectric waveguide filter, and the input/output position is changed from two sides to the bottom of the dielectric waveguide filter, so that the input/output position is directly connected with a system circuit board, the space and the cost for connecting signal connection equipment are saved, and the miniaturization and the integration of a system are facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a perspective view of a surface-mount dielectric filter including a through-hole input/output structure according to embodiment 1 of the present invention;
fig. 2 is a perspective view of a surface-mount dielectric filter including a through-hole input/output structure according to embodiment 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1 is described with respect to a 6-cavity resonator of the type described above, and the coupling means is in the form of a coupling via.
As shown in fig. 1, the surface-mount dielectric filter with a via-type input/output structure includes two bodies 110 made of solid dielectric materials, the two bodies 110 are stacked and combined to form a filter main body 100, the surface of the body 110 is coated with a conductive layer, the filter main body 100 is formed with input/output through holes 120 along a direction perpendicular to a stacking surface 140, the surface of the input/output through holes 120 is formed with a conductive layer, the input/output through holes 120 respectively surround isolation grooves 130 on the surface of the body 110, the surface of the isolation grooves 130 is free of conductive layers, the isolation grooves 130 extend towards a mounting surface 180 of the filter main body 100 and form input/output pads 190 on the mounting surface 180, the two bodies 110 are respectively formed with 3 resonators 150 arranged in an array on the back of the stacking surface 140, a frequency-tuning blind hole is formed in the center of the resonator 150, two adjacent resonators 150 are separated by a coupling device, the signal transmission window 160 has no conductive layer on its surface. The coupling means includes a coupling via 170, the coupling via 170 being perpendicular to the stacking surface 140, and a conductive layer formed on a surface of the coupling via 170.
In the embodiment, the isolation groove is isolated from the body, the input and output through hole (or blind hole) is positioned in the isolation area, and the input and output coupling amplitude of the filter can be adjusted by adjusting the groove width, size and position of the isolation groove; two adjacent resonators are separated by a coupling through hole, and the radio frequency coupling quantity between the two adjacent resonators can be adjusted by adjusting the position of the coupling through hole; each resonator is provided with a frequency modulation blind hole, the depth of the blind hole controls the frequency of the corresponding resonator, and a conductive layer is covered in the blind hole; the number of the signal transmission windows is 2, radio frequency signals are subjected to radio frequency coupling between the bodies through the signal transmission windows, and the radio frequency coupling amplitude between the bodies can be adjusted by adjusting the size and the position of the signal transmission windows.
This embodiment has the following advantages: by adopting a proper isolation groove design, the input and output directions of the through hole of the dielectric waveguide filter can be changed from the side wall of the ceramic body to the bottom of the ceramic body and directly welded with a system circuit board, no additional connecting equipment is needed, and the space occupied by the connecting equipment and the cost brought by the use of the connecting equipment are reduced; meanwhile, the resonator with the blind hole structure is used, so that the volume of the dielectric waveguide filter can be further reduced, and convenience is brought to miniaturization and integration of a system.
Embodiment 2 will be described by taking an example of an 8-cavity resonator of an embodiment, and a coupling device in the form of a coupling slot.
As shown in fig. 2, the surface-mount dielectric filter with a via-type input/output structure includes two bodies 210 made of solid dielectric material, the two bodies 210 are stacked and combined to form a filter main body 200, the surface of the body 210 is coated with a conductive layer, the filter main body 200 is formed with an input/output via 220 along a direction perpendicular to a stacking surface 240, the surface of the input/output via 220 is formed with a conductive layer, the input/output via 220 respectively surrounds an isolation slot 230 on the surface of the body 210, the surface of the isolation slot 230 is free of a conductive layer, the isolation slot 230 extends towards a mounting surface 280 of the filter main body 200 and forms an input/output pad 290 on the mounting surface 280, the two bodies 210 are respectively formed with 4 resonators 250 arranged in an array on the back of the stacking surface 240, a frequency-modulated blind hole is formed in the center of each resonator 250, two adjacent resonators 250 are separated by a coupling device, the signal transmission window 260 has no conductive layer on the surface. The coupling means includes a coupling rectangular slot 270, the coupling rectangular slot 270 being perpendicular to the stacking surface 240, and a conductive layer formed on a surface of the coupling rectangular slot 270.
In this embodiment, basically the same as embodiment 1, the isolation groove is isolated from the body, the input/output through hole (or blind hole) is located in the isolated region, and the input/output coupling amplitude of the filter can be adjusted by adjusting the groove width, size and position of the isolation groove; two adjacent resonators are separated by a coupling rectangular groove, and the radio frequency coupling quantity between the two adjacent resonators can be adjusted by adjusting the groove width and the groove depth of the coupling rectangular groove; each resonator is provided with a frequency modulation blind hole, the depth of the blind hole controls the frequency of the corresponding resonator, and a conductive layer is covered in the blind hole; the number of the signal transmission windows is 3, radio frequency signals are subjected to radio frequency coupling between the bodies through the signal transmission windows, and the radio frequency coupling amplitude between the bodies can be adjusted by adjusting the size and the position of the signal transmission windows.
It should be noted that the present invention is also applicable to dielectric waveguide filters having other number of resonators than the two embodiments described above.
Further, the solid dielectric material is preferably ceramic. The ceramic has high dielectric constant, hardness and high temperature resistance, so that the ceramic becomes a common solid dielectric material in the field of radio frequency filters. Of course, other materials known to those skilled in the art, such as glass, electrically insulating polymers, etc., may be used as the dielectric material.
Further, the conductive layer is silver.
The conductive layer is preferably a high-conductivity material such as silver.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (7)
1. The surface-mounted dielectric filter is characterized by comprising two bodies made of solid dielectric materials, wherein the two bodies are stacked and combined to form a filter main body, the surface of each body is coated with a conductive layer, input and output through holes or blind holes are formed in the filter main body along the direction perpendicular to the stacking surface, the surfaces of the input and output through holes or blind holes are provided with conductive layers, the input and output through holes or blind holes surround an isolation groove on the surface of the body, the surface of the isolation groove is free of the conductive layer, the isolation groove extends towards the mounting surface of the filter main body, and input and output bonding pads are formed on the mounting surface.
2. The surface-mounted dielectric filter with a via input/output structure as claimed in claim 1, wherein two of the bodies respectively have a plurality of resonators arranged on the back of the stacking surface, the resonators have frequency-modulated blind holes formed at the centers thereof, two adjacent resonators are separated by a coupling device, the bodies have signal transmission windows formed on the stacking surface, and the surfaces of the signal transmission windows are free of conductive layers.
3. A surface-mounted dielectric filter having a via-type input-output structure according to claim 2, wherein each of the bodies is formed with 2 or more of the resonators.
4. The surface-mounted dielectric filter with a via input/output structure as claimed in claim 2, wherein one of the frequency-modulated blind holes is formed inside each of the resonators.
5. The surface-mounted dielectric filter with a via input/output structure as claimed in claim 2, wherein the coupling means comprises a coupling via or a coupling rectangular groove perpendicular to the stacking surface, and a conductive layer is formed on the surface of the coupling via or the coupling rectangular groove.
6. The surface-mounted dielectric filter with a through-hole input-output structure as claimed in claim 1, wherein the solid dielectric material is ceramic or quartz glass.
7. The surface-mounted dielectric filter with a via input/output structure as claimed in claim 1, wherein the conductive layer is silver or copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920803134.5U CN210074108U (en) | 2019-05-30 | 2019-05-30 | Surface-mounted dielectric filter with through hole type input/output structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920803134.5U CN210074108U (en) | 2019-05-30 | 2019-05-30 | Surface-mounted dielectric filter with through hole type input/output structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210074108U true CN210074108U (en) | 2020-02-14 |
Family
ID=69455393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920803134.5U Active CN210074108U (en) | 2019-05-30 | 2019-05-30 | Surface-mounted dielectric filter with through hole type input/output structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210074108U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224205A (en) * | 2019-05-30 | 2019-09-10 | 江苏灿勤科技股份有限公司 | Surface-mount type dielectric filter containing through-hole type input/output structure |
| CN111478008A (en) * | 2020-04-17 | 2020-07-31 | 广东国华新材料科技股份有限公司 | Dielectric waveguide duplexer |
-
2019
- 2019-05-30 CN CN201920803134.5U patent/CN210074108U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224205A (en) * | 2019-05-30 | 2019-09-10 | 江苏灿勤科技股份有限公司 | Surface-mount type dielectric filter containing through-hole type input/output structure |
| CN111478008A (en) * | 2020-04-17 | 2020-07-31 | 广东国华新材料科技股份有限公司 | Dielectric waveguide duplexer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5382931A (en) | Waveguide filters having a layered dielectric structure | |
| CN1319208C (en) | Dielectric filter, antenna duplexer and communication device with filter | |
| CA2098877C (en) | Wave filter having electrically well isolated dielectric resonators | |
| JP4400853B2 (en) | Low-pass filter built-in wiring board | |
| US10056667B2 (en) | High-frequency filter and communication device module | |
| JP4000072B2 (en) | Low-pass filter built-in wiring board | |
| CN210074108U (en) | Surface-mounted dielectric filter with through hole type input/output structure | |
| CN109494489B (en) | Filtering integrated base station antenna | |
| CN109301407A (en) | Lamination sheet type bandpass filter | |
| JPH06505608A (en) | Monolithic ceramic filter or duplexer with surface mount connections and transmission zero | |
| CN110224205A (en) | Surface-mount type dielectric filter containing through-hole type input/output structure | |
| JPH11274818A (en) | High frequency circuit device | |
| CN209913007U (en) | Microwave transmission line based on multi-layer dielectric layer integration | |
| US6965276B2 (en) | Two port type isolator and communication device | |
| KR101581687B1 (en) | 3-dimentional laminate dielectric resonator assembly duplexer | |
| CA2235460C (en) | Dielectric filter, transmitting/receiving duplexer, and communication apparatus | |
| JP3422914B2 (en) | Multilayer dielectric filter | |
| CN1949588B (en) | Dielectric device | |
| KR102579968B1 (en) | RF Dielectric Waveguide Duplexer Filter Module | |
| CN214505743U (en) | PCB microstrip filter | |
| JPH0653710A (en) | Antenna multicoupler | |
| CN213752980U (en) | Low-frequency dielectric filter | |
| US8878634B2 (en) | Bandpass filter, and wireless communication module and wireless communication device using the bandpass filter | |
| KR102444699B1 (en) | waveguide slot antenna | |
| CN102738552A (en) | Dielectric medium resonant device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |