CN111211387A - Dielectric filter and radio transmitting/receiving device - Google Patents
Dielectric filter and radio transmitting/receiving device Download PDFInfo
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- CN111211387A CN111211387A CN202010134458.1A CN202010134458A CN111211387A CN 111211387 A CN111211387 A CN 111211387A CN 202010134458 A CN202010134458 A CN 202010134458A CN 111211387 A CN111211387 A CN 111211387A
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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
- H01P1/2002—Dielectric waveguide filters
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Abstract
The dielectric filter provided by the invention has the advantages that the negative coupling grooves are formed on the binding surfaces of two adjacent dielectric resonators, the conductive layers are covered on the surface of the body of the dielectric resonator and the inner wall surface of the debugging hole, the negative coupling grooves are not covered by the conductive layers, the notches of the two negative coupling grooves are butted to form the negative coupling cavity, the negative coupling cavity comprises two parallel cavities which are perpendicular to the upper surface of the dielectric resonator body and are parallel to each other and a connecting cavity which is communicated with the lower end parts of the two parallel cavities, the upper end parts of the two parallel cavities are separated by the conductive layers, the capacitive coupling between the two adjacent dielectric resonators can be realized through the negative coupling cavity, through holes or deep blind holes are not required to be arranged, the phenomenon of contraction or collapse of a ceramic material during high-temperature sintering is avoided, the electrical performance of the dielectric filter is more stable, and the size of the dielectric filter is also reduced, the invention also provides a radio transceiver device comprising the dielectric filter.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a dielectric filter and radio transceiver.
Background
With the advent of the "explosion" era of 5G communication, electronic communication devices are becoming widespread worldwide, and filters are an important part of electronic communication devices and determine key factors such as the radiation range and signal strength of electronic base stations.
The traditional filter has the defects of large volume, high loss, low dielectric constant and the like, and can not meet the requirement of 5G communication. Therefore, the dielectric waveguide filter has the advantages that the dielectric constant of the dielectric material is higher and the volume is smaller under the same resonance frequency. With the continuous improvement of the performance of the base station, the performance requirement of the filter is higher and higher, the traditional dielectric waveguide filter mostly adopts an inductive coupling mode, and is difficult to meet the specific electrical performance requirements such as the suppression of the near end of the frequency band of the filter, and in order to solve the problem, a dielectric filter adopting capacitive coupling appears in the market, for example, international patent application WO2018148905 a1 discloses a dielectric filter which realizes the capacitive coupling between resonant cavities by arranging a through hole and a conductive partition layer on a dielectric block, for example, chinese invention patent CN104604022B discloses a dielectric filter which realizes the capacitive coupling between resonators at two sides of a blind hole by punching the blind hole on a body made of a solid dielectric material, but a negative coupling hole in international patent application WO 20148905 a1 is a through hole, and the hole depth of the negative coupling hole in chinese invention patent CN104604022B is at least twice as large as the debugging hole depth, because the depth of the negative coupling hole in the two technical schemes is larger, the negative coupling hole can shrink or collapse when the ceramic material is sintered at high temperature, so that the shape and the precision of the negative coupling hole are greatly changed, the electrical performance of the dielectric filter is influenced, and the yield is low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a dielectric filter which realizes capacitive coupling between dielectric filters by arranging a negative coupling cavity, avoids forming through holes or deep blind holes on the dielectric filter, further avoids shrinkage or collapse when ceramic materials are sintered at high temperature, has stable electrical performance and high yield, and also provides radio transceiver equipment comprising the dielectric filter.
In order to achieve the above object, the dielectric filter according to the present invention includes at least two dielectric resonators, which are a first dielectric resonator and a second dielectric resonator, respectively, each dielectric resonator includes a dielectric resonator body made of a ceramic material and a tuning hole located on an upper surface of the dielectric resonator body, the tuning hole is a blind hole, and the tuning hole is used for tuning a resonant frequency of the dielectric resonator in which the tuning hole is located;
each dielectric resonator further comprises a conducting layer covering the surface of the dielectric resonator body and the surface of the inner wall of the debugging hole;
a first negative coupling groove is formed in the surface of one side of the first dielectric resonator, and the bottom of the first negative coupling groove is not covered by the conductive layer, so that the bottom of the first negative coupling groove is exposed out of the first dielectric resonator body;
a second negative coupling groove is formed in the surface of one side of the second dielectric resonator, and the bottom of the second negative coupling groove is not covered by the conductive layer, so that the bottom of the second negative coupling groove is exposed out of the second dielectric resonator body;
the side surface of the first dielectric resonator where the first negative coupling groove is located is attached to the side surface of the second dielectric resonator where the second negative coupling groove is located, so that the first dielectric resonator and the second dielectric resonator are connected into a whole, and all the dielectric resonators are connected into a whole to form the dielectric filter;
the notches of the first negative coupling groove and the second negative coupling groove are butted, so that the first negative coupling groove and the second negative coupling groove are communicated to form a negative coupling cavity, the negative coupling cavity comprises two parallel cavities which are perpendicular to the upper surface of the first dielectric resonator body and are parallel to each other, the upper end parts of the two parallel cavities are separated by the conducting layer, the negative coupling cavity further comprises a connecting cavity which is communicated with the lower end parts of the two parallel cavities, and the negative coupling cavity is used for realizing capacitive coupling between the first dielectric resonator and the second dielectric resonator.
Preferably, the axial line of the tuning hole of the first dielectric resonator and the axial line of the tuning hole of the second dielectric resonator form a virtual plane, and the two sections of parallel cavities are symmetrically distributed on two sides of the plane.
Preferably, the depth of the first negative coupling groove is greater than or equal to the thickness of the conductive layer and less than twice the thickness of the conductive layer, and the depth of the second negative coupling groove is greater than or equal to the thickness of the conductive layer and less than twice the thickness of the conductive layer.
Preferably, the connecting cavity is a circular arc-shaped cavity.
Preferably, the connecting cavity is a linear cavity.
Further preferably, the connection cavity is parallel to the upper surface of the first dielectric resonator.
Preferably, the first negative coupling groove and the second negative coupling groove are identical in shape.
Preferably, the distance between the two parallel cavities is smaller than the diameter of the debugging hole.
In order to achieve the above object, the present invention further provides a radio transceiver device including the dielectric filter according to any one of the above aspects.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the dielectric filter provided by the invention has the advantages that the negative coupling grooves are formed on the binding surfaces of two adjacent dielectric resonators, the conductive layers are covered on the surface of the body of the dielectric resonator and the inner wall surface of the debugging hole, the negative coupling grooves are not covered by the conductive layers, the negative coupling cavities can be formed by butt joint of the notches of the two negative coupling grooves, the negative coupling cavities comprise two parallel cavities which are perpendicular to the upper surface of the dielectric resonator body and are parallel to each other and a connecting cavity which is communicated with the lower end parts of the two parallel cavities, the upper end parts of the two parallel cavities are separated by the conductive layers, the capacitive coupling between the two adjacent dielectric resonators can be realized by the negative coupling cavities, through holes or deep blind holes are not required to be arranged, the phenomenon of contraction or collapse of a ceramic material during high-temperature sintering is avoided, the electrical performance of the dielectric filter is more stable, and the yield is high, the size of the dielectric filter is also reduced, and the invention also provides a radio transceiver device comprising the dielectric filter.
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 schematically showing a dielectric filter of embodiment 1 of the present invention.
Fig. 2 is a sectional view taken along a-a in fig. 1.
Fig. 3 is a sectional view taken in the direction B-B in fig. 1.
Fig. 4 is a sectional view taken along the direction C-C in fig. 1.
Fig. 5 is a schematic top view of fig. 1.
Fig. 6 is a sectional view taken in the direction D-D of fig. 5.
Fig. 7 is a sectional view taken in the direction of E-E in fig. 5.
Fig. 8 is a sectional view in the direction F-F in fig. 5.
Fig. 9 is a perspective view schematically showing a dielectric filter of embodiment 2 of the present invention.
Fig. 10 is a front view of fig. 9.
Fig. 11 is a perspective view schematically showing a dielectric filter of embodiment 3 of the present invention.
Fig. 12 is a front view of fig. 11.
Fig. 13 is a perspective view schematically illustrating a dielectric filter according to embodiment 4 of the present invention.
Fig. 14 is a front view of fig. 13.
Fig. 15 is a perspective view schematically illustrating a dielectric filter according to embodiment 5 of the present invention.
Fig. 16 is a front view of fig. 15.
Fig. 17 is a perspective view schematically showing a dielectric filter of embodiment 6 of the present invention.
Fig. 18 is a front view of fig. 17.
Fig. 19 is a perspective view schematically showing embodiment 7 of the dielectric filter of the present invention.
Fig. 20 is a front view of fig. 19.
Fig. 21 is a perspective view schematically showing a dielectric filter according to embodiment 8 of the present invention.
Fig. 22 is a front view of fig. 21.
Fig. 23 is a perspective view schematically illustrating a dielectric filter according to embodiment 9 of the present invention.
Fig. 24 is a front view of fig. 23.
Fig. 25 is an electrical characteristic diagram of the dielectric filter of example 1 of the present invention.
Wherein: 100. a dielectric filter; 200. a first dielectric resonator; 201. a first dielectric resonator body; 202. a first pilot hole; 203. a first conductive layer; 204. a first negative coupling groove; 300. a second dielectric resonator; 301. a second dielectric resonator body; 302. a second pilot hole; 303. a second conductive layer; 304. a second negative coupling groove; 400. a negative coupling cavity; 401. a parallel cavity; 402. a connecting cavity; 403 auxiliary chamber.
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 a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in fig. 1, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular 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 should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1 to 8, a dielectric filter 100 provided by the present invention includes two dielectric resonators, namely a first dielectric resonator 200 and a second dielectric resonator 300, where the first dielectric resonator 200 and the second dielectric resonator 300 have the same structure, the first dielectric resonator 200 includes a first dielectric resonator body 201 made of a ceramic material and a first tuning hole 202 located on an upper surface of the first dielectric resonator body 201, the first tuning hole 202 is a blind hole, the first tuning hole 202 is used for tuning a resonant frequency of the first dielectric resonator 200, and the first dielectric resonator 200 further includes a first conductive layer 203 covering a surface of the first dielectric resonator body 201 and an inner wall surface of the first tuning hole 202; the second dielectric resonator 300 includes a second dielectric resonator body 301 made of a ceramic material, and a second tuning hole 302 located on an upper surface of the second dielectric resonator body 301, the second tuning hole 302 is a blind hole, the second tuning hole 302 is used for tuning a resonance frequency of the second dielectric resonator 300, and the second dielectric resonator 300 further includes a second conductive layer 303 covering a surface of the second dielectric resonator body 301 and an inner wall surface of the second tuning hole 302.
A first negative coupling groove 204 is formed in the right side surface of the first dielectric resonator 200, and the bottom of the first negative coupling groove 204 is not covered by the first conductive layer 203, so that the bottom of the first negative coupling groove 204 is exposed out of the first dielectric resonator body 201; the left side surface of the second dielectric resonator 300 is provided with a second negative coupling groove 304, and the groove bottom of the second negative coupling groove 304 is not covered by the second conductive layer 303, so that the groove bottom of the second negative coupling groove 304 is exposed out of the second dielectric resonator body 301.
The right side surface of the first dielectric resonator 200 is bonded to the left side surface of the second dielectric resonator 300, so that the first dielectric resonator 200 and the second dielectric resonator 300 are integrally connected, and all the dielectric resonators are integrally connected to form the dielectric filter 100.
The right side surface of the first dielectric resonator 200 is bonded to the left side surface of the second dielectric resonator 300
When in use, the notches of the first negative coupling groove 204 and the second negative coupling groove 304 are butted, so that the first negative coupling groove 204 and the second negative coupling groove 304 are communicated to form a negative coupling cavity 400, the negative coupling cavity 400 comprises two parallel cavities 401 which are respectively perpendicular to the upper surface of the first dielectric resonator body 201 and are parallel to each other, the distance between the two parallel cavities 401 is smaller than the diameter of the first pilot hole 202/the second pilot hole 302, the upper ends of the two parallel cavities 401 are separated by the first conductive layer 203 and the second conductive layer 303, the negative coupling cavity 400 further comprises a connecting cavity 402 for communicating the lower ends of the two parallel cavities 401, in this embodiment, the connection cavity 402 is in a shape of a square with no closed end, the length of the bottom side of the connection cavity 402 is greater than the diameter of the first tuning hole 202/the second tuning hole 302, and the negative coupling cavity 400 is used for realizing the capacitive coupling between the first dielectric resonator 200 and the second dielectric resonator 300.
The axis of the first pilot hole 202 is parallel to the axis of the second pilot hole 302, and forms a virtual plane, and the two parallel cavities 401 are symmetrically distributed on two sides of the plane.
The first negative coupling groove 204 and the second negative coupling groove 304 have the same size and shape, and the depth of the first negative coupling groove 204, the depth of the second negative coupling groove 304, the thickness of the first conductive layer 203, and the thickness of the second conductive layer 303 are all equal.
As shown in fig. 25, the dielectric filter 100 generates a transmission zero a at the lower end of the filter passband B by the negative coupling cavity 400; the strength of the transmission zero point A is adjusted by adjusting the surrounding area of the connecting cavity 402, the distance between the two parallel cavities 401 and the length of the two parallel cavities 401; the larger the area enclosed by the connection cavity 402, the stronger the transmission zero point a; the smaller the slot width at the bottom of the connection cavity 402, the weaker the transmission zero point a; the longer the length of the two parallel cavities 401, the stronger the transmission zero a.
Example 2
Embodiment 2 is substantially the same as embodiment 1 except that the length of the bottom side of the connection chamber 402 in embodiment 2 is larger than the diameter of the first pilot hole 202/the second pilot hole 302.
Example 3
Embodiment 3 is substantially the same as embodiment 1, except that the connection cavity 402 in embodiment 3 is a circular arc-shaped cavity, and the length of the major axis of the ellipse in which the connection cavity 402 is located is larger than the diameter of the first/second tuning holes 202, 302.
Example 4
Embodiment 4 is substantially the same as embodiment 1, except that the connecting cavity 402 in embodiment 4 is a circular arc-shaped cavity, and the diameter of the circle in which the connecting cavity 402 is located is smaller than the diameter of the first/second tuning holes 202, 302.
Example 5
Embodiment 5 is substantially the same as embodiment 1, except that the connecting cavity 402 of embodiment 5 is a trapezoidal cavity, and two ends of the upper bottom of the trapezoidal cavity are respectively communicated with the lower ends of the two parallel cavities.
Example 6
Embodiment 6 is substantially the same as embodiment 2 except that an auxiliary chamber 403 is further connected to the upper end portions of the two pieces of parallel chambers 401 of embodiment 6, and the auxiliary chamber 403 extends outward in a direction perpendicular to the parallel chambers 401.
Example 7
Embodiment 7 is substantially the same as embodiment 4 except that an auxiliary chamber 403 is further connected to the upper end portions of the two pieces of parallel chambers 401 of embodiment 7, and the auxiliary chamber 403 extends outward in a direction perpendicular to the parallel chambers 401.
Example 8
Embodiment 8 is substantially the same as embodiment 1 except that the connection cavity 402 of embodiment 8 is a linear cavity body, and the connection cavity 402 is parallel to the upper surface of the first dielectric resonator body 201.
Example 9
Embodiment 9 is substantially the same as embodiment 8 except that an auxiliary chamber 403 is further connected to the upper end portions of the two pieces of parallel chambers 401 in embodiment 9, and the auxiliary chamber 403 extends outward in a direction perpendicular to the parallel chambers 401.
The dielectric filter provided by the invention has the advantages that the negative coupling grooves are formed on the binding surfaces of two adjacent dielectric resonators, the conductive layers are covered on the surface of the body of the dielectric resonator and the inner wall surface of the debugging hole, the negative coupling grooves are not covered by the conductive layers, the negative coupling cavities can be formed by butt joint of the notches of the two negative coupling grooves, the negative coupling cavities comprise two parallel cavities which are perpendicular to the upper surface of the dielectric resonator body and are parallel to each other and a connecting cavity which is communicated with the lower end parts of the two parallel cavities, the upper end parts of the two parallel cavities are separated by the conductive layers, the capacitive coupling between the two adjacent dielectric resonators can be realized by the negative coupling cavities, through holes or deep blind holes are not required to be arranged, the phenomenon of contraction or collapse of a ceramic material during high-temperature sintering is avoided, the electrical performance of the dielectric filter is more stable, and the yield is high, the size of the dielectric filter is also reduced.
The present invention also provides a radio transceiver device comprising a dielectric filter as in any of the above embodiments, wherein the dielectric filter in the radio transceiver device can be used for filtering radio frequency signals.
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 (9)
1. The dielectric filter is characterized by comprising at least two dielectric resonators which are respectively a first dielectric resonator and a second dielectric resonator, wherein each dielectric resonator comprises a dielectric resonator body made of ceramic materials and a debugging hole positioned on the upper surface of the dielectric resonator body, the debugging hole is a blind hole, and the debugging hole is used for debugging the resonance frequency of the dielectric resonator in which the debugging hole is positioned;
each dielectric resonator further comprises a conducting layer covering the surface of the dielectric resonator body and the surface of the inner wall of the debugging hole;
a first negative coupling groove is formed in the surface of one side of the first dielectric resonator, and the bottom of the first negative coupling groove is not covered by the conductive layer, so that the bottom of the first negative coupling groove is exposed out of the first dielectric resonator body;
a second negative coupling groove is formed in the surface of one side of the second dielectric resonator, and the bottom of the second negative coupling groove is not covered by the conductive layer, so that the bottom of the second negative coupling groove is exposed out of the second dielectric resonator body;
the side surface of the first dielectric resonator where the first negative coupling groove is located is attached to the side surface of the second dielectric resonator where the second negative coupling groove is located, so that the first dielectric resonator and the second dielectric resonator are connected into a whole, and all the dielectric resonators are connected into a whole to form the dielectric filter;
the notches of the first negative coupling groove and the second negative coupling groove are butted, so that the first negative coupling groove and the second negative coupling groove are communicated to form a negative coupling cavity, the negative coupling cavity comprises two parallel cavities which are perpendicular to the upper surface of the first dielectric resonator body and are parallel to each other, the upper end parts of the two parallel cavities are separated by the conducting layer, the negative coupling cavity further comprises a connecting cavity which is communicated with the lower end parts of the two parallel cavities, and the negative coupling cavity is used for realizing capacitive coupling between the first dielectric resonator and the second dielectric resonator.
2. The dielectric filter of claim 1, wherein the axial line of the tuning hole of the first dielectric resonator and the axial line of the tuning hole of the second dielectric resonator form a virtual plane, and the two sections of parallel cavities are symmetrically distributed on two sides of the plane.
3. The dielectric filter of claim 1, wherein the first negative coupling groove
The depth of the second negative coupling groove is greater than or equal to the thickness of the conducting layer and less than twice the thickness of the conducting layer, and the depth of the second negative coupling groove is greater than or equal to the thickness of the conducting layer and less than twice the thickness of the conducting layer.
4. The dielectric filter of claim 1, wherein the connecting cavity is a circular arc shaped cavity.
5. A dielectric filter as claimed in claim 1, wherein the connecting cavity is a rectilinear cavity.
6. A dielectric filter as recited in claim 6, wherein the connection cavity is parallel to an upper surface of the first dielectric resonator body.
7. The dielectric filter of claim 1, wherein the first negative coupling groove and the second negative coupling groove are identical in shape.
8. The dielectric filter of claim 1, wherein the distance between the two parallel cavities is less than the diameter of the tuning hole.
9. Radio transceiver device, characterized in that it comprises a dielectric filter according to any of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/126975 WO2021135643A1 (en) | 2019-12-31 | 2020-11-06 | Dielectric filter, radio transceiver device, and base station with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2019114045890 | 2019-12-31 | ||
| CN201911404589 | 2019-12-31 |
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| CN111211387A true CN111211387A (en) | 2020-05-29 |
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| CN202010134458.1A Pending CN111211387A (en) | 2019-12-31 | 2020-03-02 | Dielectric filter and radio transmitting/receiving device |
| CN202020235914.7U Active CN211182468U (en) | 2019-12-31 | 2020-03-02 | Dielectric filter and radio transmitting/receiving device |
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| WO (1) | WO2021135643A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112038738A (en) * | 2020-08-26 | 2020-12-04 | 江苏灿勤科技股份有限公司 | Filter and manufacturing method thereof |
| CN112563696A (en) * | 2020-11-30 | 2021-03-26 | 江苏灿勤科技股份有限公司 | Low-frequency dielectric filter and method for manufacturing low-frequency dielectric filter |
| WO2021135643A1 (en) * | 2019-12-31 | 2021-07-08 | 江苏灿勤科技股份有限公司 | Dielectric filter, radio transceiver device, and base station with same |
| WO2022116551A1 (en) * | 2020-12-03 | 2022-06-09 | 中兴通讯股份有限公司 | Dielectric filtering unit and dielectric filter |
| CN112563696B (en) * | 2020-11-30 | 2024-05-14 | 江苏灿勤科技股份有限公司 | Low-frequency dielectric filter and method for manufacturing same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5926079A (en) * | 1996-12-05 | 1999-07-20 | Motorola Inc. | Ceramic waveguide filter with extracted pole |
| CN105244571B (en) * | 2015-09-17 | 2018-03-09 | 深圳三星通信技术研究有限公司 | A kind of dielectric waveguide filter |
| CN110504512A (en) * | 2019-07-25 | 2019-11-26 | 江苏江佳电子股份有限公司 | A kind of capacitive coupling structure and the dielectric filter using the structure |
| CN110380165A (en) * | 2019-08-16 | 2019-10-25 | 苏州艾福电子通讯有限公司 | Dielectric filter |
| CN110444849A (en) * | 2019-09-09 | 2019-11-12 | 江苏亨鑫科技有限公司 | Its dielectric waveguide filter of a kind of negative coupled structure of dielectric resonator and application |
| CN111211387A (en) * | 2019-12-31 | 2020-05-29 | 江苏灿勤科技股份有限公司 | Dielectric filter and radio transmitting/receiving device |
-
2020
- 2020-03-02 CN CN202010134458.1A patent/CN111211387A/en active Pending
- 2020-03-02 CN CN202020235914.7U patent/CN211182468U/en active Active
- 2020-11-06 WO PCT/CN2020/126975 patent/WO2021135643A1/en active Application Filing
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021135643A1 (en) * | 2019-12-31 | 2021-07-08 | 江苏灿勤科技股份有限公司 | Dielectric filter, radio transceiver device, and base station with same |
| CN112038738A (en) * | 2020-08-26 | 2020-12-04 | 江苏灿勤科技股份有限公司 | Filter and manufacturing method thereof |
| CN112038738B (en) * | 2020-08-26 | 2024-04-26 | 江苏灿勤科技股份有限公司 | Filter and manufacturing method thereof |
| CN112563696A (en) * | 2020-11-30 | 2021-03-26 | 江苏灿勤科技股份有限公司 | Low-frequency dielectric filter and method for manufacturing low-frequency dielectric filter |
| CN112563696B (en) * | 2020-11-30 | 2024-05-14 | 江苏灿勤科技股份有限公司 | Low-frequency dielectric filter and method for manufacturing same |
| WO2022116551A1 (en) * | 2020-12-03 | 2022-06-09 | 中兴通讯股份有限公司 | Dielectric filtering unit and dielectric filter |
Also Published As
| Publication number | Publication date |
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| CN211182468U (en) | 2020-08-04 |
| WO2021135643A1 (en) | 2021-07-08 |
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