CN111370815A - TM mode dielectric filter with two grounded ends - Google Patents
TM mode dielectric filter with two grounded ends Download PDFInfo
- Publication number
- CN111370815A CN111370815A CN201811594536.5A CN201811594536A CN111370815A CN 111370815 A CN111370815 A CN 111370815A CN 201811594536 A CN201811594536 A CN 201811594536A CN 111370815 A CN111370815 A CN 111370815A
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- mode dielectric
- cover plate
- cavity
- dielectric resonator
- metal sheet
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
Abstract
The invention discloses a TM mode dielectric filter with two grounded ends, which comprises a cavity, a TM mode dielectric resonator arranged in the cavity and a cover plate assembly connected with the cavity, wherein silver baking layers are arranged at the top and the bottom of the TM mode dielectric resonator; the cavity is the metal inner wall, the radio frequency connector is installed respectively to the cavity left and right sides, the apron subassembly includes apron and the elastic metal piece that the apron downside set up. Since the dielectric resonator is stressed to a limited extent, the problem of the pressure it can bear must be considered. The elastic metal sheet is fixed through the cover plate, the dielectric resonator is pressed, the TM mode dielectric resonator is guaranteed to bear pressure, and meanwhile stress release caused by temperature change can be avoided. The invention skillfully utilizes elements such as the metal elastic sheet and the like, so that the metal layer with the short circuit function can be well attached to the end surface of the dielectric resonator, the inner surface of the cover plate and the bottom surface of the cavity, the intermodulation performance is greatly improved, and the loss is reduced; meanwhile, the cover plate and the cavity are simple in structure, easy to process and low in cost.
Description
Technical Field
The invention relates to the technical field of TM mode dielectric filters in the communication field, in particular to a TM mode dielectric filter with two grounded ends.
Background
The dielectric filter is widely applied to the communication field as a frequency selection device, and in a dielectric filter in a base station antenna feed filter, a TM mode dielectric resonator has low loss, high dielectric constant, small frequency temperature coefficient and thermal expansion coefficient, bears high power, has lower cost than a TE mode dielectric resonator, has low insertion loss, bears high power, can realize the problem that a metal resonator cannot achieve, is miniaturized, and is particularly worthy of popularization.
The realization of good double-end grounding becomes the key of a TM mode dielectric resonator, however, in the prior Chinese patent publication and publication network, a plurality of patents and utility model patents related to the dielectric resonator with double-end grounding are disclosed, and the application of materials, such as elastic materials, etc. is only designed and completed theoretically; moreover, the method has a problem that assembly and repair are not considered, so that the cost of subsequent production is increased; the uncertain factors in assembly are more, if the dielectric resonator is not fixed, the phenomena of assembly pressure deviation and the like exist, and the fixed dielectric resonator is easy to cause temperature change damage; therefore, there is an urgent need to develop a double-grounded TM mode dielectric filter with lower manufacturing and assembly costs and more stable performance.
Disclosure of Invention
The present invention is directed to a TM mode dielectric filter with two ends grounded to solve the above problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a TM mode dielectric filter with two grounded ends comprises a cavity, a TM mode dielectric resonator arranged in the cavity and a cover plate assembly connected with the cavity, wherein silver baking layers are arranged at the top and the bottom of the TM mode dielectric resonator; the TM-mode dielectric resonator is characterized in that the cover plate component comprises a cover plate and an elastic metal sheet arranged on the lower side of the cover plate, and the elastic metal sheet is in compression joint with a baked silver layer of the TM-mode dielectric resonator to realize good electrical contact.
Preferably, it is equipped with the notch cuttype recess to correspond TM mode dielectric resonator bottom in the bottom surface of cavity, and the notch cuttype recess includes one-level recess and second grade recess, and boss in the middle of one-level recess bottom and the formation of second grade recess top, TM mode dielectric resonator bottom suit is in the notch cuttype recess to the embedding is on middle boss, and the second grade recess that is close to middle boss plays and reduces TM mode dielectric resonator bottom surface and cavity notch cuttype recess area of contact, and the experiment is verified that the contact is better.
Preferably, the depth of the primary groove is 0.15-0.5 mm, the depth of the secondary groove is 0.1-0.5 mm greater than that of the primary groove, and the width of the TM mode dielectric resonator is 1.2-1.5 mm kept in unilateral contact with the primary groove.
Preferably, the upper end surface and the lower end surface of the TM mode dielectric resonator are both provided with baked silver layers, the two end surfaces are parallel, the baked silver layers are annular baked silver layers with consistent thickness and provided with through holes in the middle, annular surface contact is conveniently formed, and the through holes are free of metal layers.
Preferably, the height of the TM mode dielectric resonator is 0.15-0.25 mm higher than the upper plane of the cavity rib after the TM mode dielectric resonator is installed in the cavity, and the elastic metal sheet is flush with the cover plate.
Preferably, the height of the TM mode dielectric resonator is flush with the upper plane of the cavity rib after the TM mode dielectric resonator is installed in the cavity, and meanwhile, the elastic metal sheet exceeds the cover plate by 0.1-0.2 mm after the elastic metal sheet is installed.
Preferably, the cover plate is a single-layer cover plate or a PCB cover plate with a metal layer at the bottom, a screw hole is arranged in the middle of the cover plate, the cover plate comprises a mounting surface, namely a metal layer surface in contact with a screw head, and a functional surface, namely a metal layer surface in contact with a cavity rib, and the functional surface of the cover plate is provided with a position for mounting an elastic metal sheet, a contact concave platform and a mounting convex platform which are correspondingly and concavely arranged on the functional surface of the cover plate; the contact concave table and the mounting boss are combined into a stepped annular concave table, the periphery of the stepped annular concave table comprises a first concave table and a second concave table, and the second concave table is arranged between the first concave table and the contact concave table; the elastic metal sheet is tightly close to the plane of the contact concave table and is pressed on the side wall of the mounting boss; the bottom surface of the elastic metal sheet extends out of the lower side of the cover plate and is in compression joint with the baked silver layer of the TM mode dielectric resonator, and the elastic metal sheet and the baked silver layer of the TM mode dielectric resonator form annular surface contact.
Preferably, the depth of the contact recess is 0.1 to 0.2mm greater than the depth of the first recess, and the depth of the mounting boss is 0.25 to 0.5mm greater than the depth of the contact recess.
Preferably, the elastic metal sheet is flower-shaped, a circular hole is formed in the elastic metal sheet, at least three flanges are distributed on the side wall of the circular hole, and the flanges on the side wall are in tight fit with the mounting steps of the cover plate.
Preferably, the inner alternative of the elastic metal sheet is a ring shape, and the elastic metal sheet comprises a movable part positioned on the periphery of the elastic metal sheet and an inner ring installation fixing part with a groove, and the fixing part is pressed on the installation step of the cover plate.
Preferably, the diameter of the inner hole of the elastic metal sheet is larger than the diameter of the screw hole of the cover plate, smaller than the diameter of the inner hole of the TM mode dielectric filter and larger than the diameter of the excircle of the TM mode dielectric filter.
Preferably, the thickness of the elastic metal sheet is designed according to the height of the TM mode dielectric resonator, and is less than or equal to the depth of the contact concave platform when the upper plane of the TM mode dielectric resonator exceeds the cavity rib plane of the cavity after the TM mode dielectric resonator is installed; when the upper plane of the TM mode dielectric resonator is superposed with the cavity rib plane of the cavity after the TM mode dielectric resonator is installed correspondingly, the depth of the upper plane is larger than the depth of the contact concave table.
Preferably, the cover plate is fixed on the cavity through a mounting screw, the cover plate assembly further comprises a tuning screw rod, the tuning screw rod is arranged in the middle of the cover plate and is in threaded connection with the cover plate and extends into the cavity, a nut is sleeved on the tuning screw rod outside the cover plate, and a flat washer is arranged between the nut and the cover plate on the tuning screw rod.
Compared with the prior art, the invention has the following beneficial effects: 1. the TM mode dielectric filter provided by the invention optimizes structural members such as a thin cover plate and the like, reduces the cost and avoids the installation risk of products.
2. The functional surface of apron is provided with fixed concave station and installation step and holds this elastic metal piece, extrudees the first bottom surface of apron concave station through this shell fragment spring action, shell fragment and apron, dielectric resonator and shell fragment in close contact with, has further guaranteed dielectric resonator and cavity and apron in close contact with, and insertion loss is little, and the intermodulation index is good, very big promotion dielectric filter's performance index.
3. Meanwhile, the cover plate and the cavity are simple in structure, easy to process, low in cost and simple in structure and convenient to process.
Drawings
Fig. 1 is a schematic structural diagram of a TM mode dielectric filter grounded at both ends.
Fig. 2 is an exploded view of a cover plate assembly in a TM mode dielectric filter with both ends grounded.
Fig. 3 is an assembled mounting diagram of a cover plate assembly in a double-ended grounded TM mode dielectric filter.
Fig. 4 is a schematic structural diagram of the elastic metal sheet of the first embodiment in a TM mode dielectric filter with two ends grounded.
Fig. 5 is a schematic structural diagram of an elastic metal sheet of a second embodiment in a TM mode dielectric filter with two ends grounded.
In the figure: 1. a tuning screw; 2. a nut; 3. a flat washer; 4. a cover plate; 401. a first recessed land; 402. a second groove; 403. a contact recessed land; 404. mounting a boss; 5. a resilient metal sheet; 6. mounting screws; 7. a TM mode dielectric resonator; 8. a radio frequency connector; 9. a cavity; 901. a bottom surface of the cavity; 10. a primary groove; 11. a middle boss; 12. and (7) secondary grooves.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Example 1: referring to fig. 1-4, a TM mode dielectric filter with two grounded ends includes a cavity 9, a TM mode dielectric resonator 7 disposed in the cavity 9, and a cover plate assembly connected to the cavity 9, wherein silver layers are disposed on the top and bottom of the TM mode dielectric resonator 7; the cavity 9 is a metal inner wall, and the radio frequency connectors 8 are respectively installed on the left side and the right side of the cavity 9, and the radio frequency connector assembly is characterized in that the cover plate assembly comprises a cover plate 4 and an elastic metal sheet 5 arranged on the lower side of the cover plate 4, and the elastic metal sheet 5 is in compression joint with a baked silver layer of the TM mode dielectric resonator 7 to realize good electrical contact.
Further, it is equipped with the notch cuttype recess to correspond 7 bottoms of TM mould dielectric resonator in the bottom surface of cavity 9, and the notch cuttype recess includes one-level recess 10 and second grade recess 12, and boss 11 in the middle of one-level recess 10 bottoms and the 12 tops formation of second grade recess, 7 bottom suits of TM mould dielectric resonator are in the notch cuttype recess to the embedding is on middle boss 11, and second grade recess 12 that is close to middle boss 11 plays and reduces 7 bottoms of TM mould dielectric resonator and 9 notch cuttype recess area of cavity, and it is better to do benefit to the contact through experimental comparison.
Further, the depth of the first-stage groove 10 is 0.15 to 0.5mm, the excircle diameter of the first-stage groove is equal to or slightly larger than the excircle diameter of the TM mode dielectric resonator 7, the depth of the second-stage groove 12 is larger than the depth of the first-stage groove 10 by 0.1 to 0.5mm, the excircle diameter of the second-stage groove 12 ensures that the TM mode dielectric resonator 7 is in unilateral contact with the first-stage groove 10 to keep the width of 1.2 to 1.5mm, the inner circle diameter of the second-stage groove 12 is the excircle diameter of the middle boss 11, and the height of the middle boss 11 can be slightly higher than or equal to the.
Furthermore, baked silver layers are arranged on the upper end face and the lower end face of the TM mode dielectric resonator 7, the two end faces are parallel, the baked silver layers are annular baked silver layers with the same thickness, a through hole is formed in the middle of each baked silver layer, annular surface contact is conveniently formed, and no metal layer exists in the through hole.
Further, when the height of the TM mode dielectric resonator 7 is 0.15 to 0.25mm higher than the upper plane of the cavity rib after the TM mode dielectric resonator is installed inside the cavity 9, the elastic metal sheet 5 is flush with the cover plate 4.
Further, when the height of the TM mode dielectric resonator 7 is flush with the upper plane of the cavity rib after the TM mode dielectric resonator is installed inside the cavity 9, the elastic metal sheet 5 is installed to be 0.1 to 0.2mm beyond the cover plate 4.
Further, the cover plate 4 is a single-layer cover plate, or a PCB cover plate with a metal layer at the bottom, a screw hole is formed in the middle of the cover plate, the cover plate 4 includes a mounting surface, i.e., a metal layer surface in contact with a screw head, and a functional surface, i.e., a metal layer surface in contact with a cavity rib, the functional surface of the cover plate 4 is designed with a position for mounting the elastic metal sheet 5, and a contact concave platform 403 and a mounting convex platform 404 which are corresponding to and recessed in the functional surface of the cover plate 4; the contact concave table 403 and the mounting boss 404 are combined into a stepped ring concave table, the periphery of the stepped ring concave table comprises a first concave table 401 and a second concave table 402, and the second concave table 402 is arranged between the first concave table 401 and the contact concave table 403; the elastic metal sheet 5 abuts against the plane of the contact concave table 403 and is pressed on the side wall of the mounting convex table 404; the bottom surface of the elastic metal sheet 5 extends out of the lower side of the cover plate 4 and is in pressure contact with the baked silver layer of the TM mode dielectric resonator 7, and the elastic metal sheet 5 and the baked silver layer of the TM mode dielectric resonator 7 form annular surface contact.
Further, the depth of the contact recess 403 is 0.1 to 0.2mm greater than the depth of the first recess 401, and the depth of the mounting boss 404 is 0.25 to 0.5mm greater than the depth of the contact recess 403.
Further, the inside flower shape that is of elastic metal piece 5, be equipped with the circular port in the elastic metal piece 5, it has at least three flange to distribute on the lateral wall of circular port, and the flange on the lateral wall forms the tight fit with the installation boss 404 lateral wall of apron 4. The influence of current distribution is small, and after subsequent press mounting, metal particles and slag stains are clean and convenient.
Further, the inner alternative of the elastic metal sheet 5 is a ring type, which includes a movable portion at the periphery thereof and an inner ring mounting fixing portion with a groove, and the fixing portion is press-fitted on the side wall of the mounting boss 404 of the cover plate 4.
Furthermore, the diameter of the inner hole of the elastic metal sheet 5 is larger than the diameter of the screw hole of the cover plate 4, smaller than the diameter of the inner hole of the TM mode dielectric filter 7 and larger than the diameter of the outer circle of the TM mode dielectric filter 7.
Further, the thickness of the elastic metal sheet 5 is designed according to the height of the TM mode dielectric resonator 7, and is less than or equal to the depth of the contact concave platform 403 when the upper plane of the TM mode dielectric resonator 7 exceeds the cavity rib plane of the cavity 9 after the TM mode dielectric resonator 7 is installed; when the upper plane of the TM mode dielectric resonator 7 is coincided with the cavity rib plane of the cavity 9 after the TM mode dielectric resonator 7 is installed correspondingly, the depth of the upper plane is larger than the depth of the contact concave platform 403.
Further, the cover plate 4 is fixed on the cavity 9 through a mounting screw 6, the cover plate assembly further comprises a tuning screw rod 1, the tuning screw rod 1 is arranged in the middle of the cover plate 4, the tuning screw rod 1 is in threaded connection with the cover plate 4 and extends into the cavity 9, a nut is sleeved on the tuning screw rod 1 outside the cover plate 4, and a flat washer 3 is arranged between the nut and the cover plate 4 on the tuning screw rod 1.
Example 2: referring to fig. 5, the only difference between this embodiment and embodiment 1 is that the elastic metal sheet 5 is annular, and includes a movable portion located at the periphery thereof and an installation fixing portion located at the inner ring and having a groove, and the fixing portion is press-mounted on the installation boss 404 of the cover plate 4, so that the fixing portion will not fall off when the cover plate is installed in the cavity, and the installation maintenance cost and the assembly difficulty are reduced.
In summary, the elastic metal sheet of the present invention provides two structural forms, the two parts fixed on the cover plate have different sizes and perform the same function, the thickness of the elastic metal sheet is in a certain relationship with the height of the TM mode dielectric resonator, for example, the thickness of the elastic metal sheet exceeds the cover plate by 0.1 to 0.2mm after the elastic metal sheet is installed, the height of the TM mode dielectric resonator, that is, the upper end surface thereof can be flush with the upper surface of the cavity rib after the elastic metal sheet is installed in the cavity, otherwise, the height of the TM mode dielectric resonator, that is, the upper end surface thereof exceeds the upper surface of the cavity rib after the elastic metal sheet is installed in the cavity, if the thickness of the elastic metal sheet is flush with the cover plate or lower than the cover plate.
The working principle of the invention is as follows: the invention provides a TM mode dielectric filter with two grounded ends, which skillfully utilizes elements such as a metal elastic sheet and the like, so that a metal layer playing a role of short circuit can be fully and well attached to the end surface of a dielectric resonator, the inner surface of a cover plate and the bottom surface of a cavity, the intermodulation performance is greatly improved, and the loss is reduced; meanwhile, the cover plate and the cavity are simple in structure, easy to process, low in cost, simple in structure and convenient to process; therefore, the TM mode dielectric filter with the two grounded ends has the advantages of simple processing and assembling process, low cost, reliable short circuit and easiness in implementation.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "crimped" 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 meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (13)
1. A TM mode dielectric filter with two grounded ends comprises a cavity (9), a TM mode dielectric resonator (7) arranged in the cavity (9) and a cover plate assembly connected with the cavity (9), wherein the top and the bottom of the TM mode dielectric resonator (7) are provided with baked silver layers; the radio frequency connector assembly is characterized in that the cover plate assembly comprises a cover plate (4) and an elastic metal sheet (5) arranged on the lower side of the cover plate (4), and the elastic metal sheet (5) is in compression joint with a silver baking layer of the TM mode dielectric resonator (7).
2. The TM mode dielectric filter with the two grounded ends as claimed in claim 1, wherein a stepped groove is formed in the bottom surface of the cavity (9) corresponding to the bottom of the TM mode dielectric resonator (7), the stepped groove comprises a primary groove (10) and a secondary groove (12), a middle boss (11) is formed between the bottom of the primary groove (10) and the top of the secondary groove (12), and the bottom of the TM mode dielectric resonator (7) is sleeved in the stepped groove and embedded in the middle boss (11).
3. A double-ended grounded TM mode dielectric filter according to claim 2, wherein the depth of the primary recess (10) is 0.15 to 0.5mm, the depth of the secondary recess (12) is 0.1 to 0.5mm greater than the depth of the primary recess (10), and the TM mode dielectric resonator (7) maintains a width of 1.2 to 1.5mm in single-sided contact with the primary recess (10).
4. The TM mode dielectric filter with the two grounded ends as claimed in claim 1, wherein the TM mode dielectric resonator (7) is provided with baked silver layers on both the upper and lower end surfaces thereof, and the baked silver layers are parallel to each other on both end surfaces thereof, and the baked silver layers are annular baked silver layers having the same thickness and provided with through holes in the middle, and the through holes have no metal layer.
5. A double-ended grounded TM mode dielectric filter according to claim 1, wherein the TM mode dielectric resonator (7) is 0.15 to 0.25mm higher than the upper plane of the rib after it is mounted inside the cavity (9), and the flexible metal sheet (5) is flush with the cover plate (4).
6. A double-ended grounded TM mode dielectric filter according to claim 1, wherein the TM mode dielectric resonator (7) has a height that is flush with the upper plane of the rib after it is mounted inside the cavity (9), and the resilient metal sheet (5) is mounted 0.1 to 0.2mm beyond the cover plate (4).
7. The TM mode dielectric filter with two grounded ends as claimed in claim 1, wherein said cover plate (4) is a single layer cover plate or a PCB cover plate with a metal layer at the bottom, and has a screw hole in the middle, said cover plate (4) includes a metal layer surface with a mounting surface contacting with the screw head and a functional surface contacting with the cavity rib, and said functional surface of said cover plate (4) is designed with a position for mounting the elastic metal sheet (5), a contact concave platform (403) and a mounting convex platform (404) corresponding to and recessed in the functional surface of said cover plate (4); the contact concave table (403) and the mounting boss (404) are combined into a stepped annular concave table, the periphery of the stepped annular concave table comprises a first concave table (401) and a second concave table (402), and the second concave table (402) is arranged between the first concave table (401) and the contact concave table (403); the elastic metal sheet (5) abuts against the plane of the contact boss (403) and is pressed on the side wall of the mounting boss (404); the bottom surface of the elastic metal sheet (5) extends out of the lower side of the cover plate (4) and is in pressure contact with a baked silver layer of the TM mode dielectric resonator (7), and the elastic metal sheet (5) and the baked silver layer of the TM mode dielectric resonator (7) form annular surface contact.
8. The TM mode dielectric filter of claim 7, wherein the depth of the contact recess land (403) is 0.1 to 0.2mm greater than the depth of the first recess land (401), and the depth of the mounting boss (404) is 0.25 to 0.5mm greater than the depth of the contact recess land (403).
9. The TM mode dielectric filter with two grounded ends as claimed in claim 1, wherein said elastic metal sheet (5) has a flower shape inside, a circular hole is formed in the elastic metal sheet (5), at least three flanges are distributed on the side wall of the circular hole, and the flanges on the side wall form a tight fit with the side wall of the mounting boss (404) of the cover plate (4).
10. A double-ended TM mode dielectric filter according to claim 1, wherein the resilient metal plate (5) is of a ring type having a movable portion at its outer periphery and an inner ring mounting fixing portion with a groove, and the fixing portion is press-fitted to the side wall of the mounting boss (404) of the lid plate (4).
11. The TM mode dielectric filter of any of claims 9 or 10, wherein the diameter of the inner hole of the flexible metal sheet (5) is larger than the diameter of the screw hole of the cover plate (4), smaller than the diameter of the inner hole of the TM mode dielectric filter (7), and larger than the diameter of the outer circle of the TM mode dielectric filter (7).
12. The double-ended grounded TM mode dielectric filter according to any of claims 9-11, wherein the thickness of the flexible metal sheet (5) is designed according to the height of the TM mode dielectric resonator (7), corresponding to the depth of the contact recess (403) when the top plane of the TM mode dielectric resonator (7) exceeds the cavity rib plane of the cavity (9) after the TM mode dielectric resonator (7) is mounted; when the upper plane of the TM mode dielectric resonator (7) is superposed with the cavity rib plane of the cavity (9) after the TM mode dielectric resonator (7) is installed correspondingly, the depth of the upper plane is larger than the depth of the contact concave table (403).
13. The TM mode dielectric filter with the grounded two ends as claimed in any one of claims 1 and 7, wherein the cover plate (4) is fixed on the cavity (9) through a mounting screw (6), the cover plate assembly further comprises a tuning screw (1), the tuning screw (1) is arranged in the middle of the cover plate (4), the tuning screw (1) is in threaded connection with the cover plate (4) and extends into the cavity (9), a nut is sleeved on the tuning screw (1) outside the cover plate (4), and a flat washer (3) is arranged between the nut on the tuning screw (1) and the cover plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594536.5A CN111370815A (en) | 2018-12-25 | 2018-12-25 | TM mode dielectric filter with two grounded ends |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594536.5A CN111370815A (en) | 2018-12-25 | 2018-12-25 | TM mode dielectric filter with two grounded ends |
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| Publication Number | Publication Date |
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| CN111370815A true CN111370815A (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811594536.5A Pending CN111370815A (en) | 2018-12-25 | 2018-12-25 | TM mode dielectric filter with two grounded ends |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037484A (en) * | 2013-03-08 | 2014-09-10 | 中兴通讯股份有限公司 | Dielectric resonator and dielectric filter |
| CN106129559A (en) * | 2016-07-08 | 2016-11-16 | 广东通宇通讯股份有限公司 | A kind of TM mould both-end short circuit wave filter |
| CN107946705A (en) * | 2017-12-11 | 2018-04-20 | 四川九鼎智远知识产权运营有限公司 | A kind of dielectric filter |
-
2018
- 2018-12-25 CN CN201811594536.5A patent/CN111370815A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037484A (en) * | 2013-03-08 | 2014-09-10 | 中兴通讯股份有限公司 | Dielectric resonator and dielectric filter |
| CN106129559A (en) * | 2016-07-08 | 2016-11-16 | 广东通宇通讯股份有限公司 | A kind of TM mould both-end short circuit wave filter |
| CN107946705A (en) * | 2017-12-11 | 2018-04-20 | 四川九鼎智远知识产权运营有限公司 | A kind of dielectric filter |
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