CN103151595B - There is the resonator of liner resonance rod - Google Patents
There is the resonator of liner resonance rod Download PDFInfo
- Publication number
- CN103151595B CN103151595B CN201310112455.8A CN201310112455A CN103151595B CN 103151595 B CN103151595 B CN 103151595B CN 201310112455 A CN201310112455 A CN 201310112455A CN 103151595 B CN103151595 B CN 103151595B
- Authority
- CN
- China
- Prior art keywords
- resonant
- rod
- resonant cavity
- resonator
- lower bottom
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007747 plating Methods 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 description 15
- 238000010168 coupling process Methods 0.000 description 15
- 238000005859 coupling reaction Methods 0.000 description 15
- 238000013461 design Methods 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention openly has the resonator of liner resonance rod, comprising: resonant cavity, resonant rod and tuning screw; Resonant cavity is connected with tuning screw with resonant rod, and resonant cavity comprises: 2 sidewalls, 1 upper roof and 1 lower diapire; The inner side of lower diapire and/or the inner side of upper roof are connected with an end face of resonant rod; And lower diapire and/or upper roof have the through hole passed for accommodating described tuning screw; 2 sidewalls are connected with lower diapire with upper roof, form the resonant cavity of inner hollow; Resonant rod, is arranged in resonant cavity, and at least one rectangle square-wave-shaped, the minor face lateral surface in resonant rod is connected with the medial surface of diapire under resonant cavity and/or the medial surface of upper roof; Tuning screw is connected with the upper roof in resonant cavity and/or lower diapire and runs through, and and being arranged in resonant cavity of not mutually being connected arranged in a crossed manner with resonant rod.The invention solves after excessive or its shape miniaturization of the shape of resonator again cannot the not too low problem of guaranteed quality factor.
Description
Technical Field
The invention relates to the field of resonators, in particular to a resonator with linear resonant rods.
Background
In the prior art, with the rapid development of communication systems, people have increasingly strict requirements on communication equipment, and miniaturization and high performance become the main directions for equipment manufacturers to pursue devices. The resonator is a network element with wide application, has the characteristics of energy storage and frequency selection, and can be applied to various microwave passive devices such as filters, duplexers, oscillators and the like.
For the resonator, two resonant rod methods are used to reduce the resonant frequency:
(1) as shown in fig. 1, the disc-equipped resonance rod is used to reduce the resonance frequency by enlarging the disc, so that the size of the resonator is inevitably increased and the cost of the product is increased to some extent.
(2) As shown in fig. 2, the resonator made of the spiral resonant rod is a spiral resonant rod, which can significantly reduce the size of the resonator, but the resonator has a low quality factor, i.e., a low Q value, and cannot achieve strong coupling with each other, and is difficult to be applied to a multi-resonator microwave device with a wide bandwidth requirement.
Therefore, it is an urgent problem to solve the problems that the shape of the resonator is too large and the quality factor of the resonator is not too low after the shape is miniaturized.
Disclosure of Invention
The invention aims to provide a resonator with a linear resonant rod to solve the problems that the shape of the resonator is too large and the quality factor of the resonator cannot be ensured not to be too low after the shape is miniaturized.
To solve the above technical problem, the present invention provides 1 a resonator having a linear resonant rod, characterized in that: the resonator includes: a resonant cavity, a resonant rod and a tuning screw; wherein,
the resonant cavity is connected with the resonant rod and the tuning screw, wherein the resonant cavity comprises: 2 side walls, 1 upper top wall and 1 lower bottom wall; wherein,
the inner side of the lower bottom wall and/or the inner side of the upper top wall are connected with one end face of the resonance rod; the lower bottom wall and/or the upper top wall are/is provided with through holes for accommodating the tuning screws to pass through;
the 2 side walls are connected with the upper top wall and the lower bottom wall to form the hollow resonant cavity;
the resonant rod is arranged in the resonant cavity and is in at least one rectangular square wave shape, and the outer side surface of one short side of the resonant rod is connected with the inner side surface of the lower bottom wall and/or the inner side surface of the upper top wall of the resonant cavity;
the tuning screw is connected with the upper top wall and/or the lower bottom wall in the resonant cavity, penetrates through the upper top wall and/or the lower bottom wall in the resonant cavity, and is arranged in the resonant cavity in a manner of intersecting with the resonant rod and not being connected with the resonant rod.
Further, wherein: the resonant cavity is further a square resonant cavity.
Further, wherein: the short sides of the resonant rod are parallel to the lower bottom wall and the upper top wall in the resonant cavity, and the long sides of the resonant rod are parallel to the two side walls in the resonant cavity.
Further, wherein: the resonance rod further has a rectangular or cylindrical cross-sectional shape.
Further, wherein: the tuning screws are further square or cylindrical, and the positions of the tuning screws can be adjusted up and down, and the tuning screws are corresponding to the number of the resonance rods 2.
Further, wherein: the resonant rod is further arranged on the inner side of the lower bottom wall and/or the inner side of the upper top wall in the resonant cavity in a mode of adopting screws, welding or direct processing.
Further, wherein: the resonant cavity, the resonant rod and/or the tuning screw are further processed in a conductive oxidation, silver plating, copper plating or gold plating mode.
Further, wherein: the resonant cavity, the resonant rod and the tuning screw are further made of aluminum, aluminum alloy, copper or steel.
Compared with the prior art, the resonator with the linear resonant rod provided by the invention achieves the following technical effects:
1. the resonator achieves the required resonant frequency by increasing the length of the resonant rod, and the increase of the length of the resonant rod realizes the compression of the height of the resonant cavity by designing the resonant rod into a bending structure, so that the resonant rod can remarkably reduce the height of a device while reducing the resonant frequency, and can achieve the height size of more than half of the original device at most, thereby realizing the miniaturization of the resonator and effectively saving the production cost.
2. The linear resonant rod in the resonator has flexible design, simple integral structure and easy processing, and is suitable for batch production.
3. The linear resonant rods in the resonator can adopt an interdigital structure or a comb-shaped structure to improve the coupling coefficient among the resonant rods, and the quality factor of the linear resonant rods is far higher than that of the traditional spiral resonant rods.
4. The resonator can improve the conductivity of the surface, improve the Q value and reduce the loss.
Drawings
FIG. 1 is a perspective view of a prior art resonant bar with disks;
FIG. 2 is a perspective view of a prior art helical resonant bar;
fig. 3 is a cross-sectional view of a resonator according to a first embodiment of the present invention, when a resonant rod of the resonator has a semi-continuous rectangular square wave shape;
fig. 4 is a cross-sectional view of a resonator when a resonant rod of the resonator according to the first embodiment of the present invention has two semi-continuous rectangular square waves;
fig. 5 is a perspective view of a resonant rod of the resonator according to the first embodiment of the present invention, which has a semi-continuous rectangular square wave shape;
fig. 6 is a perspective view of a resonator according to an embodiment of the present invention, in which a resonant rod has two semi-continuous rectangular square waves;
fig. 7 is a cross-sectional view of a resonator according to a second embodiment of the present invention, in which the resonant rod is a comb-shaped coupling structure;
fig. 8 is a cross-sectional view of a resonator according to a third embodiment of the present invention, in which the resonant rod of the resonator is an interdigital coupling structure.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result. Furthermore, the term "coupled" is intended to encompass any direct or indirect electrical coupling. Thus, if a first device couples to a second device, that connection may be through a direct electrical coupling or through an indirect electrical coupling via other devices and couplings. The following description is of the preferred embodiment for carrying out the invention, and is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the scope of the invention. The scope of the present invention is defined by the appended claims.
The present invention will be described in further detail below with reference to the accompanying drawings, but the present invention is not limited thereto.
As shown in fig. 3 and 4, a resonator having a linear resonant rod according to an embodiment of the present invention includes: a resonant cavity 1, a resonant rod 2 and a tuning screw 3. Wherein,
the resonant cavity 1 is connected to the resonant rod 2 and the tuning screw 3, wherein (as shown in fig. 5 and 6) the resonant cavity further comprises: 2 side walls 12, 1 upper top wall 11 and 1 lower bottom wall 13; wherein,
the inner side of the lower bottom wall 13 and/or the inner side of the upper top wall 11 are connected with one end face of the resonance rod 2; and the lower bottom wall 13 and/or the upper top wall 11 has a through hole for receiving the tuning screw 3 to pass through;
the two side walls 12 are respectively connected with the upper top wall 11 and the lower bottom wall 13 to form the hollow resonant cavity 1;
specifically, in the first embodiment of the present invention, the resonant cavity 1 is a square-shaped resonant cavity, but may also be other suitable shapes, and is not limited herein.
The resonant rod 2 is arranged on the inner side of the lower bottom wall 13 and/or the inner side of the upper top wall 11 in the resonant cavity 1 in a mode of adopting screws, welding or direct processing, and the resonant frequency is reduced by increasing inductance, so that the miniaturization of the resonator is realized. The resonant rod 2 has at least one rectangular square wave (as shown in fig. 7 and 8, the specific embodiment adopts a plurality of rectangular square waves, and as shown in fig. 3, the resonant rod 2 has at least one half of rectangular square waves), and one short-side outer side of the resonant rod 2 is connected with the inner side of the lower bottom wall 13 and/or the inner side of the upper top wall 11 of the resonant cavity 1.
Specifically, as shown in fig. 7 and 8, the short side of the resonant rod 2 may also be parallel to the lower bottom wall 13 and the upper top wall 11 in the resonant cavity 1, and the long side thereof is parallel to the 2 side walls 12 in the resonant cavity, and the cross section of the resonant rod 2 has a rectangular or cylindrical shape, etc., and this change does not affect the resonant frequency of the resonator, so it is not limited herein.
The tuning screw 3 is connected with the upper top wall 11 and/or the lower bottom wall 13 in the resonant cavity 1, penetrates through the upper top wall 11 and/or the lower bottom wall 13 in the resonant cavity 1, and is arranged in the resonant cavity 1 in a manner of intersecting with and not being connected with the resonant rod 2.
In particular, the tuning screws 3 are fixed to the upper top wall 11 and/or the lower bottom wall 13 of the resonator 1 by means of nuts, and can be adjusted in position up and down, and can also be present in correspondence with the number of said resonant rods 2, with the purpose of fine-tuning the resonant frequency of said resonator.
As shown in fig. 3 and 4, a specific embodiment of the present invention is shown, wherein the resonant rod 2 is disposed at a central position in the resonant cavity 1, the resonant rod 2 is in a shape of one half or more rectangular waves, and an outer side of one short side of the resonant rod 2 is connected to an inner side of a lower bottom wall 13 in the resonant cavity 1.
As shown in fig. 5, in another specific embodiment of the present invention, two resonant rods 2 are included, and the resonant rods 2 are disposed inside the resonant cavity 1 at equal intervals, both resonant rods 2 are connected to the inner side of the lower bottom wall 13 in the resonant cavity 1, both resonant rods 2 are in a semi-continuous rectangular wave shape, and the long sides of both resonant rods are parallel to each other, forming a comb-shaped coupling structure. In the structure, the coupling coefficient between the two resonance rods 2 can be adjusted by adjusting the coupling screws, and when the resonator is applied to a filter, a duplexer and other devices, the resonance rods 2 with the comb-shaped structure can realize the energy coupling between the resonance rods 2.
As shown in fig. 6, in a third embodiment of the present invention, the resonator includes two resonant rods 2, the resonant rods 2 are disposed inside the resonant cavity 1 at equal intervals, the two resonant rods 2 are respectively connected to the inner side of the lower bottom wall 13 and the inner side of the upper top wall 11 in the resonant cavity 1, each of the two resonant rods 2 is in a semi-continuous rectangular wave shape, long sides of the two resonant rods disposed adjacent to each other are inserted and parallel to each other to form an interdigital coupling structure, and when the resonator is applied to a filter, a duplexer, and other devices, the resonant rods 2 in the interdigital structure can realize energy coupling between the resonant rods 2.
In addition, in the above embodiments, the materials of the resonant cavity 1, the resonant rod 2 and the tuning screw 5 may all be aluminum, aluminum alloy, copper or steel, etc., and are determined by their electrical performance designs, and are formed by milling, die casting, wire cutting, etc., and particularly, the surfaces of the resonant cavity 1, the resonant rod 2 and/or the tuning screw 3 may all be treated by conductive oxidation, silver plating, copper plating or gold plating, so as to improve the surface conductivity, improve the Q value and reduce the loss.
Compared with the prior art, the resonator with the linear resonant rod provided by the invention achieves the following technical effects:
1. the resonator achieves the required resonant frequency by increasing the length of the resonant rod, and the increase of the length of the resonant rod realizes the compression of the height of the resonant cavity by designing the resonant rod into a bending structure, so that the resonant rod can remarkably reduce the height of a device while reducing the resonant frequency, and can achieve the height size of more than half of the original device at most, thereby realizing the miniaturization of the resonator and effectively saving the production cost.
2. The resonance rod of the resonator has flexible design, simple integral structure and easy processing, and is suitable for batch production.
3. The resonance rods of the resonator can adopt an interdigital structure or a comb-shaped structure to improve the coupling coefficient among the resonance rods, and the quality factor of the resonance rods is far higher than that of the traditional spiral line resonance rods.
4. The resonator can improve the conductivity of the surface, improve the Q value and reduce the loss.
It should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and does not limit the scope of the invention, and that the invention may be modified in materials and structures, or replaced with technical equivalents. Therefore, structural equivalents made by using the description and drawings of the present invention or by directly or indirectly applying to other related arts are also encompassed within the scope of the present invention.
Claims (8)
1. A resonator having a linear resonant rod, characterized in that: the resonator includes: a resonant cavity, a resonant rod and a tuning screw; wherein,
the resonant cavity is connected with the resonant rod and the tuning screw, wherein the resonant cavity comprises: 2 side walls, 1 upper top wall and 1 lower bottom wall; wherein,
the inner side of the lower bottom wall and/or the inner side of the upper top wall are connected with one end face of the resonance rod; the lower bottom wall and/or the upper top wall are/is provided with through holes for accommodating the tuning screws to pass through;
the 2 side walls are connected with the upper top wall and the lower bottom wall to form the hollow resonant cavity;
the resonant rods are arranged in the resonant cavity and are in at least one semi-continuous rectangular wave shape, and only one short-side outer side surface of each resonant rod is connected with the inner side surface of the lower bottom wall and/or the inner side surface of the upper top wall of the resonant cavity;
the tuning screw is connected with the upper top wall and/or the lower bottom wall in the resonant cavity, penetrates through the upper top wall and/or the lower bottom wall in the resonant cavity, and is arranged in the resonant cavity in a manner of intersecting with the resonant rod and not being connected with the resonant rod.
2. The resonator with the linear resonant rod as recited in claim 1, wherein: the resonant cavity is further a square resonant cavity.
3. The resonator with the linear resonant rod as recited in claim 1, wherein: the short sides of the resonant rod are parallel to the lower bottom wall and the upper top wall in the resonant cavity, and the long sides of the resonant rod are parallel to the two side walls in the resonant cavity.
4. A resonator having a linear resonant rod, as recited in claim 3, wherein: the resonance rod further has a rectangular or cylindrical cross-sectional shape.
5. The resonator with the linear resonant rod as recited in claim 1, wherein: the tuning screws are further square or cylindrical, and the positions of the tuning screws can be adjusted up and down, and the tuning screws are corresponding to the number of the resonance rods 2.
6. The resonator having the linear resonance rod as recited in any one of claims 1 to 5, wherein: the resonant rod is further arranged on the inner side of the lower bottom wall and/or the inner side of the upper top wall in the resonant cavity in a mode of adopting screws, welding or direct processing.
7. The resonator having the linear resonance rod as recited in any one of claims 1 to 5, wherein: the resonant cavity, the resonant rod and/or the tuning screw are further processed in a conductive oxidation, silver plating, copper plating or gold plating mode.
8. The resonator having the linear resonance rod as recited in any one of claims 1 to 5, wherein: the resonant cavity, the resonant rod and the tuning screw are further made of aluminum, aluminum alloy, copper or steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310112455.8A CN103151595B (en) | 2013-04-02 | 2013-04-02 | There is the resonator of liner resonance rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310112455.8A CN103151595B (en) | 2013-04-02 | 2013-04-02 | There is the resonator of liner resonance rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103151595A CN103151595A (en) | 2013-06-12 |
| CN103151595B true CN103151595B (en) | 2016-04-27 |
Family
ID=48549539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310112455.8A Active CN103151595B (en) | 2013-04-02 | 2013-04-02 | There is the resonator of liner resonance rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103151595B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101797519B1 (en) * | 2016-10-24 | 2017-11-14 | 진영달 | ceramic cavity filter |
| CN109244612B (en) * | 2018-09-28 | 2024-03-22 | 西南应用磁学研究所 | Miniaturized comb-shaped ceramic tube medium cavity filter |
| CN109950671A (en) * | 2019-04-03 | 2019-06-28 | 江苏贝孚德通讯科技股份有限公司 | Pectination duplexer |
| CN116417770B (en) * | 2023-06-09 | 2023-09-29 | 京信射频技术(广州)有限公司 | Filter, capacitive coupling structure and adjusting method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201252149Y (en) * | 2008-09-02 | 2009-06-03 | 合肥博仑微波器件有限公司 | Cavity stepped impedance band rejection filter |
| CN201966311U (en) * | 2010-12-27 | 2011-09-07 | 深圳市威富通讯技术有限公司 | Comb line medium module and comb line medium filter |
| CN102790249A (en) * | 2012-09-11 | 2012-11-21 | 成都赛纳赛德科技有限公司 | Compact interdigital filter |
| CN202797213U (en) * | 2012-08-13 | 2013-03-13 | 苏州市大富通信技术有限公司 | Cavity filter and cross coupling structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7777598B2 (en) * | 2008-04-14 | 2010-08-17 | Radio Frequency Systems, Inc. | Dielectric combine cavity filter having ceramic resonator rods suspended by polymer wedge mounting structures |
-
2013
- 2013-04-02 CN CN201310112455.8A patent/CN103151595B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201252149Y (en) * | 2008-09-02 | 2009-06-03 | 合肥博仑微波器件有限公司 | Cavity stepped impedance band rejection filter |
| CN201966311U (en) * | 2010-12-27 | 2011-09-07 | 深圳市威富通讯技术有限公司 | Comb line medium module and comb line medium filter |
| CN202797213U (en) * | 2012-08-13 | 2013-03-13 | 苏州市大富通信技术有限公司 | Cavity filter and cross coupling structure |
| CN102790249A (en) * | 2012-09-11 | 2012-11-21 | 成都赛纳赛德科技有限公司 | Compact interdigital filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103151595A (en) | 2013-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109411853B (en) | Cavity high-Q three-mode dielectric resonance hollow structure and filter comprising same | |
| CN103022621A (en) | Resonator utilizing medium block loading | |
| CN103151595B (en) | There is the resonator of liner resonance rod | |
| US9236846B2 (en) | Tunable bandpass filter device and method | |
| CN110380164A (en) | Ceramic dielectric waveguide filter | |
| CN109411852B (en) | Cavity high-Q three-mode dielectric resonance structure and filter comprising same | |
| CN208782003U (en) | A kind of cross coupling structure and cavity body filter | |
| US12021291B2 (en) | High-Q multi-mode dielectric resonant structure and dielectric filter | |
| CN103378388A (en) | Coaxial wide-band filter | |
| CN105356022B (en) | A kind of tunable filter for introducing groove and removable metal column | |
| TWI542070B (en) | Low-pass filter path and the use of its communication cavity device | |
| CN106816675B (en) | Cavity type band-stop filter and radio frequency device | |
| CN110400992A (en) | A kind of dielectric filter and communication equipment | |
| US20100265009A1 (en) | Stacked lc resonator and bandpass filter of using the same | |
| CN103762403A (en) | Three-passing-band filter | |
| CN103594767B (en) | A kind of integrated cavity body filter | |
| CN109888442A (en) | A kind of four mould medium bandpass filters | |
| CN111033886B (en) | Cross coupling structure and cavity filter | |
| CN107204502B (en) | The three mould balun bandpass filters based on asymmetric coupling line | |
| CN202839917U (en) | Low-frequency wide-band high-power band pass filter | |
| CN206742469U (en) | A kind of medium interdigital filter | |
| KR101238258B1 (en) | Metamaterial crlh coaxial cavity resonator | |
| CN210430042U (en) | Dual-mode dual-frequency coaxial cavity filter | |
| CN203617410U (en) | Integrated cavity filter | |
| EP3280000A1 (en) | Dielectric filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |