CN211629271U - Dielectric filter and radio transceiver apparatus including the same - Google Patents
Dielectric filter and radio transceiver apparatus including the same Download PDFInfo
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- CN211629271U CN211629271U CN202020726403.5U CN202020726403U CN211629271U CN 211629271 U CN211629271 U CN 211629271U CN 202020726403 U CN202020726403 U CN 202020726403U CN 211629271 U CN211629271 U CN 211629271U
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- 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 utility model provides a dielectric filter, through setting up the first negative coupling groove on the upper surface of dielectric resonator body, set up the second negative coupling groove on the lower surface of dielectric filter body, set up the negative coupling hole of connecting first negative coupling groove and second negative coupling groove in dielectric filter body, make at least one in first negative coupling groove, second negative coupling groove, negative coupling hole be located the hookup location of two dielectric resonators of dielectric filter, can realize the capacitive coupling of this dielectric filter through the combined action of first negative coupling groove, second negative coupling groove, negative coupling hole, this dielectric filter need not to set up the electrically conductive partition layer, the manufacturing procedure is simple, with low costs, because the existence of first negative coupling groove and second negative coupling groove, can greatly reduce the degree of depth of blind groove, the deformation of blind groove bottom wall is little during the sintering, the influence to the degree of blind groove is little, the electric performance to dielectric filter influences for a short time, the utility model discloses still provide a radio transceiver including this dielectric filter.
Description
Technical Field
The present invention relates to the field of electronic communication devices, and more particularly, to a dielectric filter and a transceiver device including the dielectric filter.
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. Along 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 inhibition 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 WO 2018148905 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, but the scheme needs to additionally arrange the conductive partition layer, has complex working procedures, needs to use additional equipment and has high cost, for example, Chinese utility model patent CN104604022B discloses a dielectric filter which realizes the capacitive coupling between resonators at two sides of a blind hole by drilling the blind hole on a body made of a solid dielectric material, but the blind hole in the scheme is deeper, the aperture is less, and the processing degree of difficulty is big to, the deformation that blind hole diapire caused because of epirelief or recessed when sintering is big, seriously influences the precision of blind hole, and then influences dielectric filter's electrical property.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's shortcoming, provide one kind and adopt first negative coupling groove, second negative coupling groove and negative coupling hole combined action to realize capacitive coupling's dielectric filter, this dielectric filter need not to set up electrically conductive partition layer, and manufacturing procedure is simple, and is with low costs, because the existence in two blind grooves, the degree of depth in can the blind groove of greatly reduced, the deformation of blind groove diapire during the sintering is little, and is little to the influence of blind groove precision, and is little to dielectric filter's electrical property influence, the utility model also provides a radio transceiver including this dielectric filter.
In order to achieve the above object, the present invention adopts a technical solution that a dielectric filter 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 for tuning a resonant frequency of the dielectric resonator where the tuning hole is located; all the dielectric resonator bodies constitute a dielectric filter body, and the dielectric filter further includes:
the first negative coupling groove is positioned on the upper surface of the dielectric filter body;
the second negative coupling groove is positioned on the lower surface of the dielectric filter body;
the negative coupling hole is used for communicating the first negative coupling groove and the second negative coupling groove and is positioned inside the dielectric filter body;
and the conducting layer covers the surface of the body of the dielectric filter, the surface of the inner wall of the debugging hole, the surface of the inner wall of the first negative coupling groove, the surface of the inner wall of the second negative coupling groove and the surface of the inner wall of the negative coupling hole;
at least one of the first negative coupling groove, the second negative coupling groove and the negative coupling hole is located at the connecting position of the two dielectric resonator bodies and is connected with the two dielectric resonators, and the first negative coupling groove, the second negative coupling groove and the negative coupling hole are used for realizing capacitive coupling between the two dielectric resonators.
Preferably, the axes of the debugging holes on the two dielectric filters are parallel to each other and form a virtual plane, and the axis of the negative coupling hole is located in the plane.
Further preferably, the axial line of the negative coupling hole is parallel to the axial lines of the debugging holes on the two dielectric filters.
Further preferably, the axial lines of the debugging holes on the two dielectric filters are symmetrically distributed on two sides of the axial line of the negative coupling hole.
Preferably, the first negative coupling groove is communicated with the debugging hole, and a cavity in the debugging hole is communicated with a cavity in the first negative coupling groove.
Preferably, the hole depth of the negative coupling hole is greater than or equal to two times the thickness of the conductive layer.
Preferably, most of the first negative coupling groove is located on the body of the first dielectric resonator, and most of the second negative coupling groove is located on the body of the second dielectric resonator.
Preferably, an opening of the first negative coupling groove on the upper surface of the dielectric filter body is any one of a circle, an ellipse and a polygon, and an opening of the second negative coupling groove on the lower surface of the dielectric filter body is any one of a circle, an ellipse and a polygon.
Preferably, the cross section of the negative coupling hole is any one of circular, oval and polygonal.
In order to achieve the above object, the present invention further includes a transceiver device, wherein the transceiver device includes any one of the dielectric filters.
Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:
the utility model provides a dielectric filter, through setting up the first negative coupling groove on the upper surface of dielectric resonator body, set up the second negative coupling groove on the lower surface of dielectric filter body, set up the negative coupling hole of connecting first negative coupling groove and second negative coupling groove in dielectric filter body, make at least one in first negative coupling groove, second negative coupling groove, negative coupling hole be located the hookup location of two dielectric resonators of dielectric filter, can realize the capacitive coupling of this dielectric filter through the combined action of first negative coupling groove, second negative coupling groove, negative coupling hole, this dielectric filter need not to set up the electrically conductive partition layer, the manufacturing procedure is simple, with low costs, because the existence of first negative coupling groove and second negative coupling groove, can greatly reduce the degree of depth of blind groove, the deformation of blind groove bottom wall is little during the sintering, the influence to the blind groove precision is little, the influence to dielectric filter electrical property is little, the utility model discloses still provide a radio transceiver including this 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 schematic view of an embodiment 1 of the dielectric filter according to the present invention.
Fig. 2 is a schematic top view of fig. 1.
Fig. 3 is a sectional view taken along a-a in fig. 2.
Fig. 4 is a schematic perspective view of the dielectric filter in accordance with embodiment 2 of the present invention.
Fig. 5 is a top view of fig. 4.
Fig. 6 is a sectional view taken in the direction B-B in fig. 5.
Fig. 7 is a schematic perspective view of the dielectric filter of embodiment 3 of the present invention.
Fig. 8 is a top view of fig. 7.
Fig. 9 is a sectional view taken in the direction C-C in fig. 8.
Fig. 10 is a schematic perspective view of an embodiment 4 of the dielectric filter according to the present invention.
Fig. 11 is a top view of fig. 10.
Fig. 12 is a sectional view taken in the direction D-D of fig. 11.
Fig. 13 is a schematic perspective view of an embodiment 5 of the dielectric filter according to the present invention.
Fig. 14 is a top view of fig. 13.
Fig. 15 is a sectional view taken in the direction of E-E in fig. 14.
Fig. 16 is a schematic perspective view of an embodiment 6 of the dielectric filter according to the present invention.
Fig. 17 is a top view of fig. 16.
Fig. 18 is a sectional view in the direction F-F in fig. 17.
Fig. 19 is a schematic perspective view of the dielectric filter according to embodiment 7 of the present invention.
Fig. 20 is a top view of fig. 19.
Fig. 21 is a sectional view in the direction of G-G in fig. 20.
Fig. 22 is a schematic perspective view of an embodiment 8 of the dielectric filter according to the present invention.
Fig. 23 is a top view of fig. 22.
Fig. 24 is a sectional view taken in the direction H-H in fig. 23.
Fig. 25 is a schematic perspective view of the dielectric filter according to embodiment 9 of the present invention.
Fig. 26 is a top view of fig. 25.
Fig. 27 is a sectional view taken in the direction of I-I in fig. 26.
Fig. 28 is a schematic perspective view of an embodiment 10 of the dielectric filter according to the present invention.
Fig. 29 is a top view of fig. 28.
Fig. 30 is a sectional view taken along the direction J-J in fig. 29.
Fig. 31 is a schematic perspective view of an embodiment 11 of the dielectric filter according to the present invention.
Fig. 32 is a top view of fig. 31.
Fig. 33 is a cross-sectional view taken along the direction K-K in fig. 32.
Fig. 34 is a schematic perspective view of the dielectric filter according to embodiment 12 of the present invention.
Fig. 35 is a top view of fig. 34.
Fig. 36 is a sectional view taken in the direction L-L in fig. 35.
Fig. 37 is a schematic perspective view of an embodiment 13 of the dielectric filter according to the present invention.
Fig. 38 is a top view of fig. 37.
Fig. 39 is a cross-sectional view taken in the direction of M-M in fig. 38.
Fig. 40 is an electrical performance diagram of the dielectric filter according to embodiment 1 of the present invention.
Wherein: 10. a dielectric filter; 101. a dielectric filter body; 20. a first dielectric resonator; 201. a first dielectric resonator body; 202. a first pilot hole; 30. a second dielectric resonator; 301. a second dielectric resonator body; 302. a second pilot hole; 41. a first negative coupling groove; 42. a second negative coupling groove; 43. a negative coupling aperture; 50. and a conductive layer.
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", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in fig. 1, 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
As shown in fig. 1-3, the present invention provides a dielectric filter 10, including two dielectric resonators with the same structure, which are a first dielectric resonator 20 and a second dielectric resonator 30, respectively, where the first dielectric resonator 20 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, and the first tuning hole 202 is used for tuning a resonant frequency of the first dielectric resonator 20; the second dielectric resonator 30 comprises a second dielectric resonator body 301 made of a ceramic material and a second debugging hole 302 positioned on the upper surface of the second dielectric resonator body 301, the second debugging hole 302 is a blind hole, and the second debugging hole 302 is used for debugging the resonance frequency of the second dielectric resonator 30; the first dielectric resonator body 201 and the second dielectric resonator body 301 together form a dielectric filter body 101, the dielectric filter 10 further includes a first negative coupling groove 41, a second negative coupling groove 42, a negative coupling hole 43, and a conductive layer 50, wherein the first negative coupling groove 41 is located on the upper surface of the dielectric filter body 101, the first negative coupling groove 41 is a blind groove, the second negative coupling groove 42 is located on the lower surface of the dielectric filter body 101, the second negative coupling groove 42 is a blind groove, the negative coupling hole 43 is located inside the dielectric filter body 101, the negative coupling hole 43 is used for communicating the first negative coupling groove 41 and the second negative coupling groove 42, specifically, the negative coupling hole 43 is opened at the bottom of the first negative coupling groove 41 and extends downward until penetrating through the bottom of the second negative coupling groove 42, the conductive layer 50 covers the surface of the dielectric filter body 101, the inner wall surface of the first tuning hole 201, the inner wall surface of the second tuning hole 301, and the conductive layer 50, The inner wall surfaces of the first negative coupling groove 41, the negative coupling hole 43 and the second negative coupling groove 42, and the conductive layer 50 is made of silver.
The right end of the first negative coupling groove 41, the left end of the second negative coupling groove 42 and the negative coupling hole 43 are located at the connecting position of the first dielectric resonator 20 and the second dielectric resonator 30 and are connected with the first dielectric resonator 20 and the second dielectric resonator 30, and the first negative coupling groove 41, the second negative coupling groove 42 and the negative coupling hole 43 are used for realizing capacitive coupling between the first dielectric resonator 20 and the second dielectric resonator 30.
The axial lines of the first debugging hole 202 and the second debugging hole 302 are parallel, the axial lines of the first debugging hole 202 and the second debugging hole 302 form a virtual plane, the axial line of the negative coupling hole 43 is located in the plane and is parallel to the axial lines of the first debugging hole 202 and the second debugging hole 302, the axial lines of the first debugging hole 202 and the second debugging hole 302 are symmetrically distributed on two sides of the axial line of the negative coupling hole 43, the groove depths of the first negative coupling groove 41 and the second negative coupling groove 42 are equal, and the groove depth of the first negative coupling groove 41 is smaller than the hole depths of the first debugging hole 202 and the second debugging hole 302.
The notch of the first negative coupling groove 41 on the upper surface of the dielectric filter body 101 is rectangular, most of the first negative coupling groove 41 is positioned on the first dielectric resonator body 201, the notch of the second negative coupling groove 42 on the lower surface of the dielectric filter body 101 is rectangular, most of the second negative coupling groove 42 is positioned on the second dielectric resonator body 301, the cross section of the negative coupling hole 43 is circular, and the diameter of the negative coupling hole 43 is smaller than the diameters of the first debugging hole 202 and the second debugging hole 302.
As shown in fig. 40, the capacitive coupling between the first dielectric resonator 20 and the second dielectric resonator 30 is achieved by the first negative coupling groove 41, the second negative coupling groove 42, and the negative coupling hole 43 to generate the low-end transmission zero point a; the strength of the transmission zero point a is adjusted by adjusting the size of the first negative coupling groove 41 and/or the second negative coupling groove 42, the distance between the first negative coupling groove 41 and the first pilot hole 202, and the diameter and length of the negative coupling hole 43; the wider the groove width of the first negative coupling groove 41 and/or the second negative coupling groove 42, the stronger the intensity of the transmission zero point a; the closer the distance between the first negative coupling groove 41 and the first pilot hole 202 is, the stronger the intensity of the transmission zero point a is; the larger the diameter of the negative coupling hole 43 is, the stronger the intensity of the transmission zero point a is; the shorter the length of the negative coupling hole 43 in the up-down direction, the stronger the intensity of the transmission zero point a.
Example 2
As shown in fig. 4 to 6, embodiment 2 is substantially the same as embodiment 1 except that the negative coupling hole 43 in embodiment 2 is rectangular in cross section.
Example 3
As shown in fig. 7 to 9, embodiment 3 is substantially the same as embodiment 1 except that the right side wall of the first negative coupling groove 41 in embodiment 3 is a circular arc surface whose axis coincides with the axis of the negative coupling hole 43; the left side wall of the second negative coupling groove 42 is a circular arc surface, and the axis of the circular arc surface coincides with the axis of the negative coupling hole 43.
Example 4
As shown in fig. 10 to 12, embodiment 4 is substantially the same as embodiment 3 except that the negative coupling hole 43 in embodiment 4 is rectangular in cross section.
Example 5
As shown in fig. 13 to 15, embodiment 5 is substantially the same as embodiment 1 except that in embodiment 5, the opening of the first negative coupling groove 41 on the upper surface of the dielectric filter body 101 is circular, and the axial line of the first negative coupling groove 41 is parallel to the axial lines of the first and second tuning holes 202 and 302; the opening of the second negative coupling groove 42 on the lower surface of the dielectric filter body 101 is circular, and the axial line of the second negative coupling groove 42 is parallel to the axial lines of the first tuning hole 202 and the second tuning hole 302.
Example 6
As shown in fig. 16 to 18, embodiment 6 is substantially the same as embodiment 5 except that the negative coupling hole 43 in embodiment 6 is rectangular in cross section.
Example 7
As shown in fig. 19 to 21, embodiment 7 is substantially the same as embodiment 1 except that the end of the first negative coupling groove 41 in embodiment 7 near the first pilot hole 202 is communicated with the first pilot hole 202 so that the cavity inside the first pilot hole 202 is communicated with the cavity inside the first negative coupling groove 41.
Example 8
As shown in fig. 22 to 24, embodiment 8 is substantially the same as embodiment 7 except that the negative coupling hole 43 in embodiment 8 is rectangular in cross section.
Example 9
As shown in fig. 25 to 27, embodiment 9 is substantially the same as embodiment 3 except that the end of the first negative coupling groove 41 in embodiment 9 near the first pilot hole 202 is communicated with the first pilot hole 202 so that the cavity inside the first pilot hole 202 is communicated with the cavity inside the first negative coupling groove 41.
Example 10
28-30, embodiment 10 is substantially the same as embodiment 9 except that the negative coupling hole 43 in embodiment 10 is rectangular in cross-section.
Example 11
As shown in fig. 31 to 33, embodiment 11 is substantially the same as embodiment 5 except that the end of the first negative coupling groove 41 in embodiment 11 near the first pilot hole 202 is communicated with the first pilot hole 202, so that the cavity inside the first pilot hole 202 is communicated with the cavity inside the first negative coupling groove 41.
Example 12
As shown in fig. 34 to 36, embodiment 12 is substantially the same as embodiment 11 except that the negative coupling hole 43 in embodiment 12 is rectangular in cross section.
Example 13
As shown in fig. 37 to 39, embodiment 13 is substantially the same as embodiment 1 except that the length of the negative coupling hole 43 in the up-down direction in embodiment 13 is equal to twice the thickness of the conductive layer 50.
The utility model provides a dielectric filter, through setting up the first negative coupling groove on the upper surface of dielectric resonator body, set up the second negative coupling groove on the lower surface of dielectric filter body, set up the negative coupling hole of connecting first negative coupling groove and second negative coupling groove in dielectric filter body, make at least one in first negative coupling groove, second negative coupling groove, negative coupling hole be located the hookup location of two dielectric resonators of dielectric filter, can realize the capacitive coupling of this dielectric filter through the combined action of first negative coupling groove, second negative coupling groove, negative coupling hole, this dielectric filter need not to set up the electrically conductive partition layer, the manufacturing procedure is simple, with low costs, because the existence of first negative coupling groove and second negative coupling groove, can greatly reduce the degree of depth of blind groove, the deformation of blind groove bottom wall is little during the sintering, the influence to the blind groove precision is little, the influence on the electrical performance of the dielectric filter is small.
The utility model also provides a radio transceiver, this radio transceiver include any one of the dielectric filter in the above-mentioned embodiment, and the dielectric filter among this radio transceiver can be used for filtering radio frequency signal.
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 (10)
1. The dielectric filter is characterized by comprising at least two dielectric resonators which are a first dielectric resonator and a second dielectric resonator respectively, 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, and the debugging hole is a blind hole and used for debugging the resonance frequency of the dielectric resonator in which the debugging hole is positioned; all the dielectric resonator bodies constitute a dielectric filter body, and the dielectric filter further includes:
the first negative coupling groove is positioned on the upper surface of the dielectric filter body;
the second negative coupling groove is positioned on the lower surface of the dielectric filter body;
the negative coupling hole is used for communicating the first negative coupling groove and the second negative coupling groove and is positioned inside the dielectric filter body;
and the conducting layer covers the surface of the body of the dielectric filter, the surface of the inner wall of the debugging hole, the surface of the inner wall of the first negative coupling groove, the surface of the inner wall of the second negative coupling groove and the surface of the inner wall of the negative coupling hole;
at least one of the first negative coupling groove, the second negative coupling groove and the negative coupling hole is located at the connecting position of the two dielectric resonator bodies and is connected with the two dielectric resonators, and the first negative coupling groove, the second negative coupling groove and the negative coupling hole are used for realizing capacitive coupling between the two dielectric resonators.
2. A dielectric filter as recited in claim 1, wherein the axes of said tuning holes in said two dielectric resonators are parallel and form a virtual plane, and the axis of said negative coupling hole is located in said plane.
3. The dielectric filter of claim 2, wherein an axis of the negative coupling hole is parallel to an axis of the tuning holes of the two dielectric filters.
4. The dielectric filter of claim 3, wherein the axes of the tuning holes on the two dielectric resonators are symmetrically distributed on two sides of the axis of the negative coupling hole.
5. The dielectric filter of claim 1, wherein the first negative coupling groove is perforated with the debugging hole.
6. The dielectric filter of claim 1, wherein the negative coupling hole has a hole depth equal to or greater than twice the thickness of the conductive layer.
7. A dielectric filter as recited in claim 1, wherein a majority of the first negative coupling slot is located on the body of the first dielectric resonator and a majority of the second negative coupling slot is located on the body of the second dielectric resonator.
8. The dielectric filter according to claim 1, wherein an opening of the first negative coupling groove on the upper surface of the dielectric filter body is any one of circular, elliptical and polygonal; the opening of the second negative coupling groove on the lower surface of the dielectric filter body is any one of a circle, an ellipse and a polygon.
9. The dielectric filter of claim 1, wherein the cross section of the negative coupling hole is any one of a circle, an ellipse and a polygon.
10. Radio transceiver device, characterized in that it comprises a dielectric filter according to any of claims 1 to 9.
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| CN201911404563 | 2019-12-31 | ||
| CN2019114045636 | 2019-12-31 |
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| CN202020726403.5U Active CN211629271U (en) | 2019-12-31 | 2020-05-06 | Dielectric filter and radio transceiver apparatus including the same |
| CN202010371431.4A Pending CN111403872A (en) | 2019-12-31 | 2020-05-06 | Dielectric filter and radio transceiver apparatus including the same |
| CN202011371708.XA Pending CN112542666A (en) | 2019-12-31 | 2020-11-30 | Filter |
| CN202022825511.0U Active CN213752979U (en) | 2019-12-31 | 2020-11-30 | Filter |
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| CN202011371708.XA Pending CN112542666A (en) | 2019-12-31 | 2020-11-30 | Filter |
| CN202022825511.0U Active CN213752979U (en) | 2019-12-31 | 2020-11-30 | Filter |
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| CN211629271U (en) * | 2019-12-31 | 2020-10-02 | 江苏灿勤科技股份有限公司 | Dielectric filter and radio transceiver apparatus including the same |
| CN112072239A (en) * | 2020-08-28 | 2020-12-11 | 潮州三环（集团）股份有限公司 | Dielectric filter and manufacturing method thereof |
| CN112072240B (en) * | 2020-08-28 | 2021-11-16 | 潮州三环（集团）股份有限公司 | Dielectric waveguide filter and manufacturing method thereof |
| CN114583430B (en) * | 2020-11-30 | 2023-06-06 | 华为技术有限公司 | Resonator, dielectric filter, and communication device |
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| JP2001085905A (en) * | 1999-09-17 | 2001-03-30 | Tokin Corp | Dielectric filter |
| CN110137638B (en) * | 2019-04-26 | 2021-05-11 | 摩比科技（深圳）有限公司 | Ceramic waveguide filter |
| CN110534851B (en) * | 2019-09-28 | 2024-05-28 | 江西一创新材料有限公司 | Dielectric filter and dielectric filter coupling structure for realizing symmetrical transmission zero point |
| CN210628462U (en) * | 2019-10-31 | 2020-05-26 | 摩比科技（深圳）有限公司 | Waveguide filter |
| CN111129667B (en) * | 2019-11-25 | 2021-02-12 | 江苏希奥飞尔微电子科技有限公司 | Negative coupling structure applied to dielectric waveguide filter and dielectric waveguide filter |
| CN211629271U (en) * | 2019-12-31 | 2020-10-02 | 江苏灿勤科技股份有限公司 | Dielectric filter and radio transceiver apparatus including the same |
| CN111740193A (en) * | 2020-06-23 | 2020-10-02 | 大富科技(安徽)股份有限公司 | Dielectric filter and communication base station |
| CN111834715A (en) * | 2020-06-23 | 2020-10-27 | 大富科技(安徽)股份有限公司 | Dielectric filter coupling structure, dielectric filter and communication base station |
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- 2020-05-06 CN CN202010371431.4A patent/CN111403872A/en active Pending
- 2020-11-03 WO PCT/CN2020/126106 patent/WO2021135621A1/en active Application Filing
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| WO2021135621A1 (en) | 2021-07-08 |
| CN112542666A (en) | 2021-03-23 |
| CN213752979U (en) | 2021-07-20 |
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