CN108879046A - Cavity body filter - Google Patents
Cavity body filter Download PDFInfo
- Publication number
- CN108879046A CN108879046A CN201810721905.6A CN201810721905A CN108879046A CN 108879046 A CN108879046 A CN 108879046A CN 201810721905 A CN201810721905 A CN 201810721905A CN 108879046 A CN108879046 A CN 108879046A
- Authority
- CN
- China
- Prior art keywords
- lightning protection
- cavity
- connecting part
- conducting connecting
- body filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 16
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 238000004891 communication Methods 0.000 description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Details Of Aerials (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
The present invention provides a kind of cavity body filters, including cavity, lightning protection structure and conducting connecting part.Multiple resonant cavities and a common cavity are equipped in cavity；Each resonant cavity is arranged around common cavity, and each resonant cavity is of coupled connections with common cavity respectively by respective coupling window；Cavity is equipped with transmission port, and transmission port is corresponding with common cavity；Lightning protection structure corresponds to transmission port and is arranged and is connected with transmission port；Lightning protection structure includes lightning protection inductance, and is electrically connected lighting protection plate and lightning protection mobile jib in lightning protection inductance both ends；Conducting connecting part one end is electrically connected with common cavity, and the other end is electrically connected with the lightning protection mobile jib of lightning protection structure；Conducting connecting part in the form of sheets, and matches with transmission port.Conducting connecting part of the invention uses laminated structure, can not only guarantee that the hardness of conducting connecting part is allowed to be unlikely to deform, and match with transmission port, so that the port time delay value of filter is stablized.
Description
Technical field
The present invention relates to the communications fields, and in particular to a kind of cavity body filter.
Background technique
Cavity body filter is widely used in the communications field as a kind of frequency selection device, in communication base station system,
It is mainly used for selecting signal of communication, filters out the clutter or interference signal outside communication signal frequency.With the hair of modern communications technology
Exhibition, people propose more stringent requirement to the performance of communication equipment, volume and weight, this results in cavity body filter
Miniaturization becomes current inexorable trend.
Thunder and lightning is a kind of common natural calamity, the electrical equipment being connected with communication line of often breaking, cavity body filter
Key equipment as receiving and transmitting signal.When in use, it is necessary to consider that lightning Protection Design, existing cavity body filter lightning Protection Design are general
The mode being grounded using port, using silver jacketed wire, one end is connected on cavity body filter, other end ground connection.Cavity body filter end
Mouth ground connection not only makes lightning protection channel residual voltage index performance poor, and the limited diameter for making silver jacketed wire in space of cavity body filter exists
Between 1.5mm-3mm, therefore silver jacketed wire is easily deformed, its impedance cannot reach desirable value after silver jacketed wire deformation, can cause cavity
Matching imbalance between silver jacketed wire, keeps the delay data of port unstable, eventually leads to cavity body filter and is difficult to reach ideal
Port time delay intensity.
Summary of the invention
The purpose of the present invention is to provide a kind of cavity body filters, to solve the problems of the prior art.
In order to solve the above technical problems, the present invention provides a kind of cavity body filter, including：Cavity is equipped in the cavity
Multiple resonant cavities and a common cavity；Each resonant cavity is arranged around the common cavity, and each resonant cavity passes through respective coupling window
It is of coupled connections respectively with the common cavity；The cavity is equipped with transmission port, and the transmission port is opposite with the common cavity
It answers；Lightning protection structure corresponds to the transmission port and is arranged and is connected with the transmission port；The lightning protection structure includes thunder-lightning
Sense, and it is electrically connected lighting protection plate and lightning protection mobile jib in lightning protection inductance both ends；Conducting connecting part, one end with it is described public
Chamber electrical connection, the other end are electrically connected with the lightning protection mobile jib of the lightning protection structure；The conducting connecting part in the form of sheets, and with the biography
Defeated port matches.
Preferably, the material of the conducting connecting part is copper；The conducting connecting part is made by wire cutting technology.
Preferably, the outside of the conducting connecting part is additionally provided with fixing piece, and the material of the fixing piece is polytetrafluoroethylene (PTFE).
Preferably, the fixing piece is arranged along the length direction interval of the conducting connecting part.
Preferably, the impedance of the conducting connecting part is 50 ohm.
Preferably, the lightning protection mobile jib includes：Inner core, one end are electrically connected with the conducting connecting part；Insulating layer is one
The tubular cavity of end opening and the periphery for being set to the inner core；Conductive layer for tubular cavity open at one end and is set to described
The periphery of insulating layer；The conductive layer is electrically connected with one end of the lightning protection inductance.
Preferably, the inner core, the conductive layer material be aluminium or copper；The material of the insulating layer is polytetrafluoroethyl-ne
Alkene.
Preferably, the lightning protection mobile jib is spaced apart up and down with the lighting protection plate, and the lightning protection inductance is set to the lightning protection
Between mobile jib and the lighting protection plate.
Preferably, the lighting protection plate includes lightning protection wiring board, and the lightning protection component with the lightning protection circuit board electrical connection, institute
Lightning protection wiring board is stated to connect with the thunder-lightning electrification；The lightning protection component is set on the lightning protection wiring board far from the lightning protection
The side of mobile jib.
Preferably, the conducting connecting part is electrically connected with the common cavity by port tap line.
As shown from the above technical solution, the advantages and positive effects of the present invention are：Cavity body filter of the invention includes
The conducting connecting part of cavity, lightning protection structure and connection cavity and lightning protection structure.Conducting connecting part uses laminated structure, not only can be with
Guarantee that the hardness of conducting connecting part is allowed to be unlikely to deform, and match with transmission port, so that the port time delay value of filter is steady
It is fixed.And cavity body filter avoids influencing each other between each filter channel by the way of common cavity coupling, therefore with biography
Defeated port preferably matches.Further, common cavity passes through port tap line and external connection again, reduces port tap line
Quantity.Lightning protection structure uses hollow coupled structure, keeps lightning protection properties more optimized, preferably protects cavity body filter.Filter cavity
The manufacture of wave device is simpler.
Detailed description of the invention
Fig. 1 is the schematic diagram of cavity body filter preferred embodiment of the present invention；
Fig. 2 is the schematic diagram of common cavity coupled modes of the present invention；
Fig. 3 is the schematic diagram of lightning protection structure preferred embodiment.
Wherein, the reference numerals are as follows：1, cavity body filter；11, cavity；111, resonant cavity；112, common cavity；
1121, port tap line；12, lightning protection structure；121, lighting protection plate；122, lightning protection inductance；123, lightning protection mobile jib；1231, inner core；
1232, insulating layer；1233, conductive layer；13, conducting connecting part.
Specific embodiment
The exemplary embodiment for embodying feature of present invention and advantage will describe in detail in the following description.It should be understood that
The present invention can have various variations in different embodiments, neither depart from the scope of the present invention, and theory therein
Bright and diagram inherently is illustrated as being used, rather than to limit the present invention.
Principle and structure in order to further illustrate the present invention carry out the preferred embodiment of the present invention now in conjunction with attached drawing detailed
It describes in detail bright.
- Fig. 3 refering to fig. 1, the present invention provide a kind of cavity body filter 1, including cavity 11, lightning protection structure 12 and connection cavity
11 and lightning protection structure 12 conducting connecting part 13.In the form of sheets, hardness is higher for conducting connecting part 13, is unlikely to deform, and with cavity 11
On transmission port match, and make cavity body filter 1 port time delay value stablize.
Specifically, the impedance of conducting connecting part 13 is 50 ohm.It can not only guarantee that the hardness of conducting connecting part 13 is allowed to
It is unlikely to deform, and matches with transmission port, so that the port time delay value of cavity body filter 1 is stablized.In the present embodiment, conduction is even
The material of fitting 13 is copper.In other embodiments, conducting connecting part 13 can also be the good conductor material of iron or other electricity.
In the present embodiment, the conducting connecting part 13 of sheet is made by wire cutting technology, wire cutting technology machining accuracy is high,
And material and capacity usage ratio are high.In other embodiments, the conducting connecting part 13 of sheet can also be made by way of corrosion.
More preferably, the outside of conducting connecting part 13 is additionally provided with fixing piece, for fixing conducting connecting part 13.Further,
Fixing piece is arranged along the length direction interval of conducting connecting part 13.Guarantee can preferably stable conducting connecting part 13, and not shadow
Ring the transmission of signal.Specifically, in the present embodiment, the material of fixing piece is polytetrafluoroethylene (PTFE).
Referring again to Fig. 2, a common cavity 112 and three resonant cavities around the common cavity 112 setting are equipped in cavity 11
111.Common cavity 112 is corresponding with transmission port, and three resonant cavities 111 are arranged in parallel and make filter there are three the tools of cavity body filter 1
Wave device channel.Each resonant cavity 111 is of coupled connections with common cavity 112 respectively by respective coupling window, avoids each filter
Influencing each other between channel, therefore preferably matched with transmission port.Common cavity 112 passes through port tap line 1121 and leads again
Electrical connector 13 connects, and reduces the quantity of port tap line, keeps the manufacture of cavity body filter 1 simpler.In other embodiments,
The resonant cavity 111 of more multi-parallel can also be set, can also be connected between the resonant cavity 111 being respectively arranged in parallel and common cavity 112
Resonant cavity selects according to actual needs.
Specifically, the present embodiment is illustrated so that transmission port is input port as an example, i.e., input port is connected with lightning protection
Structure 12 is connect by conducting connecting part 13 with input port.In other embodiments, transmission port can be output port, i.e.,
Output port is connected with lightning protection structure 12, is connect by conducting connecting part 13 with output port.It can be according to actual needs only defeated
Lightning protection structure 12 is arranged in inbound port or output port, lightning protection structure 12 can also be arranged in input port and output port simultaneously.
Refering to Fig. 3, lightning protection structure 12 includes lightning protection inductance 122, and is electrically connected in the lightning protection at 122 both ends of lightning protection inductance
Plate 121 and lightning protection mobile jib 123.
In the present embodiment, lightning protection structure 12 further includes shell, and shell has built-in space, lightning protection inductance 122, lighting protection plate
121 and lightning protection mobile jib 123 be set in built-in space.More preferably, lighting protection plate 121 includes lightning protection wiring board and lightning protection component.It is anti-
Thunder device and lightning protection circuit board electrical connection, lightning protection wiring board are electrically connected with lightning protection inductance 122.
Further, between the upper and lower every setting, lightning protection inductance 122 is set to lightning protection mobile jib for lightning protection mobile jib 123 and lighting protection plate 121
Between 123 and lighting protection plate 121, space layout is more reasonable.Lightning protection component is set to one far from lightning protection mobile jib 123 on lightning protection wiring board
Side.
Lightning protection mobile jib 123 includes inner core 1231, insulating layer 1232 and the conductive layer 1233 set gradually from inside to outside.Specifically
Ground, in the present embodiment, inner core 1231, insulating layer 1232 and conductive layer 1233 are coaxially disposed.
One end of inner core 1231 is electrically connected with conducting connecting part 13.More preferably, the material of inner core 1231 is aluminium or copper.Insulation
Layer 1232 is for tubular cavity open at one end and set on the periphery of inner core 1231.More preferably, the material of insulating layer 1232 is poly- four
Vinyl fluoride.Conductive layer 1233 is tubular cavity open at one end and the periphery set on insulating layer 1232, conductive layer 1233 and lightning protection
One end of inductance 122 is electrically connected.More preferably, the material of conductive layer 1233 is aluminium or copper.Because of inner core 1231 and conductive layer 1233
Between be equipped with insulating layer 1232, and lightning protection mobile jib 123 is made to constitute hollow coupled structure, hollow coupled structure passes through inner core 1231
Coupling with conductive layer 1233 and transmit signal, avoid the influence of other kinds signal, optimize lightning protection index.
In the present embodiment, there is gap between inner core 1231 and insulating layer 1232.In other embodiments, inner core 1231 and absolutely
It can also be arranged between edge layer 1232 with gapless.
Further, the material of shell is aluminium, when lightning protection inductance 122 is set to the built-in space of shell, lightning protection inductance 122
It is equipped with medium with enclosure interior contact position, and is not turned on lightning protection inductance 122 with shell.
The signals transmission of the cavity body filter 1 of the present embodiment is as follows：Signal first passes through the lighting protection plate of lightning protection structure 12
121, it is transmitted to lightning protection mobile jib 123 using lightning protection inductance 122, the conductive layer 1233 of lightning protection mobile jib 123 is by coupling signal
It is transmitted to inner core 1231, inner core 1231 transmits a signal to port tap line 1121 by conducting connecting part 13 and reaches common cavity
112, common cavity 112 transmits signals to each resonant cavity 111 by coupled modes.The lightning protection component of lighting protection plate 121 can be by signal
In thunder and lightning absorb and make to reach in the signal of common cavity 112 to protect cavity body filter 1 without containing thunder and lightning.
As shown from the above technical solution, the advantages and positive effects of the present invention are：Cavity body filter of the invention includes
The conducting connecting part of cavity, lightning protection structure and connection cavity and lightning protection structure.Conducting connecting part uses laminated structure, not only can be with
Guarantee that the hardness of conducting connecting part is allowed to be unlikely to deform, and match with transmission port, so that the port time delay value of filter is steady
It is fixed.And cavity body filter avoids influencing each other between each filter channel by the way of common cavity coupling, therefore with biography
Defeated port preferably matches.Further, common cavity passes through port tap line and external connection again, reduces port tap line
Quantity.Lightning protection structure uses hollow coupled structure, keeps lightning protection properties more optimized, preferably protects cavity body filter.
The above is only preferable possible embodiments of the invention, not limit the scope of the invention, all with the present invention
The variation of equivalent structure made by specification and accompanying drawing content, is included within the scope of protection of the present invention.
Claims (10)
1. a kind of cavity body filter, which is characterized in that including：
Cavity, the cavity is interior to be equipped with multiple resonant cavities and a common cavity；Each resonant cavity is arranged around the common cavity, and each humorous
Vibration chamber is of coupled connections with the common cavity respectively by respective coupling window；The cavity is equipped with transmission port, the biography
Defeated port is corresponding with the common cavity；
Lightning protection structure corresponds to the transmission port and is arranged and is connected with the transmission port；The lightning protection structure includes lightning protection
Inductance, and it is electrically connected lighting protection plate and lightning protection mobile jib in lightning protection inductance both ends；
Conducting connecting part, one end are electrically connected with the common cavity, and the other end is electrically connected with the lightning protection mobile jib of the lightning protection structure；Institute
It states conducting connecting part in the form of sheets, and matches with the transmission port.
2. cavity body filter according to claim 1, which is characterized in that the material of the conducting connecting part is copper；
The conducting connecting part is made by wire cutting technology.
3. cavity body filter according to claim 1, which is characterized in that the outside of the conducting connecting part is additionally provided with fixation
Part, the material of the fixing piece are polytetrafluoroethylene (PTFE).
4. cavity body filter according to claim 3, which is characterized in that length of the fixing piece along the conducting connecting part
Spend the setting of direction interval.
5. cavity body filter according to claim 1, which is characterized in that the impedance of the conducting connecting part is 50 ohm.
6. cavity body filter according to claim 1, which is characterized in that the lightning protection mobile jib includes：
Inner core, one end are electrically connected with the conducting connecting part；
Insulating layer, for tubular cavity open at one end and set on the periphery of the inner core；
Conductive layer, for tubular cavity open at one end and set on the periphery of the insulating layer；The conductive layer and the lightning protection
One end of inductance is electrically connected.
7. cavity body filter according to claim 6, which is characterized in that the inner core, the conductive layer material be
Aluminium or copper；
The material of the insulating layer is polytetrafluoroethylene (PTFE).
8. cavity body filter according to claim 1, which is characterized in that the lightning protection mobile jib and the lighting protection plate are between the upper and lower
Every placement, the lightning protection inductance is set between the lightning protection mobile jib and the lighting protection plate.
9. cavity body filter according to claim 8, which is characterized in that the lighting protection plate includes lightning protection wiring board, and with
The lightning protection component of the lightning protection circuit board electrical connection, the lightning protection wiring board are connect with the thunder-lightning electrification；
The lightning protection component is set to the side on the lightning protection wiring board far from the lightning protection mobile jib.
10. cavity body filter according to claim 1, which is characterized in that the conducting connecting part and the common cavity are logical
Cross the electrical connection of port tap line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810721905.6A CN108879046B (en) | 2018-07-04 | 2018-07-04 | Cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810721905.6A CN108879046B (en) | 2018-07-04 | 2018-07-04 | Cavity filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108879046A true CN108879046A (en) | 2018-11-23 |
| CN108879046B CN108879046B (en) | 2020-02-11 |
Family
ID=64298949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810721905.6A Active CN108879046B (en) | 2018-07-04 | 2018-07-04 | Cavity filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108879046B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023050201A1 (en) * | 2021-09-29 | 2023-04-06 | 华为技术有限公司 | Filter, remote radio unit and base station |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09271138A (en) * | 1996-03-29 | 1997-10-14 | Chubu Electric Power Co Inc | Lightning-proof system for waveguide |
| CN200997528Y (en) * | 2006-12-30 | 2007-12-26 | 摩比天线技术（深圳）有限公司 | Lightening-proof radio frequency module |
| JP2008004360A (en) * | 2006-06-22 | 2008-01-10 | Nippon Dengyo Kosaku Co Ltd | TIP SHORT-CIRCUIT(lambda/4) COAXIAL CIRCUIT |
| CN201084808Y (en) * | 2007-09-04 | 2008-07-09 | 深圳市配天网络技术有限公司 | A lightning prevention structure for coaxial cavity wave-filter |
| CN202495561U (en) * | 2012-03-27 | 2012-10-17 | 成都市大富科技有限公司 | Cavity filter and filter cavity |
| CN204289667U (en) * | 2014-12-30 | 2015-04-22 | 宁波华瓷通信技术有限公司 | A kind of port coupled structure of filter |
| CN104882651A (en) * | 2015-05-15 | 2015-09-02 | 摩比天线技术（深圳）有限公司 | Terminal port structure of radio frequency filter and radio frequency filter |
| CN204651450U (en) * | 2015-06-10 | 2015-09-16 | 苏州东山精密制造股份有限公司 | Common cavity tap mechanism |
| CN205319274U (en) * | 2016-01-22 | 2016-06-15 | 宁波华瓷通信技术有限公司 | Filtering lightning protection device |
| CN205752464U (en) * | 2016-06-18 | 2016-11-30 | 上海觉浅广播器材有限公司 | Band lightning protection frequency modulation 5kW power low pass filter |
| CN206806477U (en) * | 2017-05-15 | 2017-12-26 | 常州金信诺凤市通信设备有限公司 | A kind of spiral arrester |
-
2018
- 2018-07-04 CN CN201810721905.6A patent/CN108879046B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09271138A (en) * | 1996-03-29 | 1997-10-14 | Chubu Electric Power Co Inc | Lightning-proof system for waveguide |
| JP2008004360A (en) * | 2006-06-22 | 2008-01-10 | Nippon Dengyo Kosaku Co Ltd | TIP SHORT-CIRCUIT(lambda/4) COAXIAL CIRCUIT |
| CN200997528Y (en) * | 2006-12-30 | 2007-12-26 | 摩比天线技术（深圳）有限公司 | Lightening-proof radio frequency module |
| CN201084808Y (en) * | 2007-09-04 | 2008-07-09 | 深圳市配天网络技术有限公司 | A lightning prevention structure for coaxial cavity wave-filter |
| CN202495561U (en) * | 2012-03-27 | 2012-10-17 | 成都市大富科技有限公司 | Cavity filter and filter cavity |
| CN204289667U (en) * | 2014-12-30 | 2015-04-22 | 宁波华瓷通信技术有限公司 | A kind of port coupled structure of filter |
| CN104882651A (en) * | 2015-05-15 | 2015-09-02 | 摩比天线技术（深圳）有限公司 | Terminal port structure of radio frequency filter and radio frequency filter |
| CN204651450U (en) * | 2015-06-10 | 2015-09-16 | 苏州东山精密制造股份有限公司 | Common cavity tap mechanism |
| CN205319274U (en) * | 2016-01-22 | 2016-06-15 | 宁波华瓷通信技术有限公司 | Filtering lightning protection device |
| CN205752464U (en) * | 2016-06-18 | 2016-11-30 | 上海觉浅广播器材有限公司 | Band lightning protection frequency modulation 5kW power low pass filter |
| CN206806477U (en) * | 2017-05-15 | 2017-12-26 | 常州金信诺凤市通信设备有限公司 | A kind of spiral arrester |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023050201A1 (en) * | 2021-09-29 | 2023-04-06 | 华为技术有限公司 | Filter, remote radio unit and base station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108879046B (en) | 2020-02-11 |
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Denomination of invention: Cavity filter Effective date of registration: 20200930 Granted publication date: 20200211 Pledgee: Shenzhen Shendan Zengcheng Financing Guarantee Co.,Ltd. Pledgor: MOBI ANTENNA TECHNOLOGIES (SHENZHEN) Co.,Ltd.|MOBI TELECOMMUNICATIONS TECHNOLOGIES (JI'AN) Co.,Ltd.|MOBI TECHNOLOGIES (XI'AN) Co.,Ltd.|MOBI TECHNOLOGY (SHENZHEN) Co.,Ltd. Registration number: Y2020990001188 |
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Date of cancellation: 20230526 Granted publication date: 20200211 Pledgee: Shenzhen Shendan Zengcheng Financing Guarantee Co.,Ltd. Pledgor: MOBI ANTENNA TECHNOLOGIES (SHENZHEN) Co.,Ltd.|MOBI TELECOMMUNICATIONS TECHNOLOGIES (JI'AN) Co.,Ltd.|MOBI TECHNOLOGIES (XI'AN) Co.,Ltd.|MOBI TECHNOLOGY (SHENZHEN) Co.,Ltd. Registration number: Y2020990001188 |