CN109981068A - A kind of Novel Filter and its isolation structure - Google Patents
A kind of Novel Filter and its isolation structure Download PDFInfo
- Publication number
- CN109981068A CN109981068A CN201910381766.1A CN201910381766A CN109981068A CN 109981068 A CN109981068 A CN 109981068A CN 201910381766 A CN201910381766 A CN 201910381766A CN 109981068 A CN109981068 A CN 109981068A
- Authority
- CN
- China
- Prior art keywords
- fixed
- filter
- protection box
- isolation structure
- bottom plate
- 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
- 238000002955 isolation Methods 0.000 title claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 27
- 239000000428 dust Substances 0.000 claims description 10
- 230000017525 heat dissipation Effects 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 230000013011 mating Effects 0.000 description 3
- 229910000570 Cupronickel Inorganic materials 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20145—Means for directing air flow, e.g. ducts, deflectors, plenum or guides
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0009—Casings with provisions to reduce EMI leakage through the joining parts
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
- H03H2001/0021—Constructional details
- H03H2001/0028—RFI filters with housing divided in two bodies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present invention relates to filters, more particularly to a kind of Novel Filter and its isolation structure, including protection box and bottom plate, protection box interior place opposite with bottom plate is equipped with accommodating chamber, bottom is fixed with sliding rail in accommodating chamber, sliding block is slidably connected on sliding rail, movable block is fixed on sliding block, movable block is connect with bolt thread is adjusted, movable block is fixed with the limited block through protection box inner wall, sidewall of the bottom plate is equipped with the limiting slot cooperated with limited block, rack is fixed on bottom plate, filtering body is fixed on rack, first filter is equipped with inside filtering body, second filter, it is electrically connected between first filter and second filter by cable, first filter, the shielded layer fixed with filtering body inner wall is equipped with outside second filter；The defect that technical solution provided by the invention can effectively overcome Isolated Shield effect present in the prior art poor, without heat sinking function, inconvenient dismounting.
Description
Technical field
The present invention relates to filters, and in particular to a kind of Novel Filter and its isolation structure.
Background technique
Shielding case is made of supporting leg and cover, and supporting leg is to be flexibly connected with cover, and cover is in spherical crown shape.This component is mainly answered
It is to prevent electromagnetic interference (EMI), to the device of element and LCM shielding actions on pcb board for fields such as mobile phone, GPS.
The stainless steel and foreign white copper that shielding case generally uses 0.2mm thickness is materials, and wherein foreign white copper is a kind of metal screen for being easy upper tin
Cover material.In general, filter is mainly made of filter cavity and cover board, multiple resonant rods, tuning are equipped in filter cavity body
It is opposite with resonant rod that screw rod one end penetrates cover board, adjusts the distance between tuning screw and resonant rod by adjusting tool to reach
Required RF index.
Since there are due to temperature drift etc., need to guarantee to filter for the exact requirements selected frequency and filter itself
The intracorporal temperature of device chamber cannot be excessively high, and filter itself has certain operating power.Therefore, in some radio frequency operation lists
In member, such as Remote Radio Unit (Radio Remote Unit, RRU), it is often used the filter with radiator structure.Band heat dissipation knot
The filter of structure needs to meet the heat dissipation of filter itself by radiating shell and being made of one of filter equipment.
Summary of the invention
(1) the technical issues of solving
For disadvantages mentioned above present in the prior art, the present invention provides a kind of Novel Filter and its isolation structure,
The defect that can effectively overcome Isolated Shield effect present in the prior art poor, without heat sinking function, inconvenient dismounting.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs:
A kind of Novel Filter and its isolation structure, including protection box and bottom plate, the protection box interior and bottom plate
Opposite place is equipped with accommodating chamber, and bottom is fixed with sliding rail in the accommodating chamber, and sliding block, the sliding block are slidably connected on the sliding rail
On be fixed with movable block, the movable block connect with bolt thread is adjusted, the movable block with run through the protection box inner wall
Limited block is fixed, and the sidewall of the bottom plate is equipped with the limiting slot cooperated with the limited block；
It is fixed with rack on the bottom plate, is fixed with filtering body on the rack, in the filtering body
Portion is equipped with first filter, second filter, is electrically connected between the first filter and the second filter by cable
It connects, the shielded layer fixed with the filtering body inner wall is equipped with outside the first filter, second filter；
Fixed frame is equipped with above the filtering body, the fixed frame sidewall thread is connected with fixing bolt, described solid
Determine to be fixed with heat sink on frame, through there is heat-dissipating pipe inside the heat sink, the heat sink passes through heat dissipation fence and mounting plate
It is connected and fixed, it is opposite on the mounting plate to offer mounting hole, radiator fan is fixedly installed with inside the mounting hole, it is described anti-
Shield box side wall is opposite to run through and is fixed with intake stack, and place opposite with the radiator fan runs through and fixes at the top of the protection box
There is a wind pipe, the intake stack, wind pipe outer end are respectively and fixedly provided with dust cover, inside the intake stack, wind pipe
It is respectively and fixedly provided with Air Filter.
Preferably, the adjusting bolt and the protection box side wall are rotatablely connected.
Preferably, the adjusting bolt and protection box side wall contact position are equipped with bearing, the adjusting bolt and institute
It states and grinds off screw thread at bearing touch.
Preferably, the first filter, be equipped with over and under second filter and the shielded layer is fixed
Screening cover.
Preferably, reinforcing rib is fixed between the shielded layer.
Preferably, the heat-dissipating pipe is uniformly arranged in the shape of a spiral inside the heat sink.
Preferably, the fixed frame, heat sink are all made of Heat Conduction Material and are made.
(3) beneficial effect
Compared with prior art, a kind of Novel Filter and its isolation structure provided by the present invention are using shielded layer by the
One filter and second filter Isolated Shield, effectively improve Isolated Shield effect, the setting of reinforcing rib can be improved filter
The structural strength of ontology；Fixed frame and heat sink can export the heat generated when filtering body work, dissipating in mounting hole
Hot-air fan can be by outside air inside intake stack sucking protection box, and blows out from wind pipe, so as to protect
It is distinguished and admirable that flowing is formed inside box, the operating temperature of filtering body is effectively reduced, the setting of Air Filter and dust cover can prevent
External dust enters inside protection box when heat dissipation；When needing to overhaul filtering body, screw adjusting bolt, sliding rail with
Under the mating reaction of sliding block, movable block drives limited block to be displaced outwardly, to release locking of the limited block to limiting slot, dismounting is anti-
It is very convenient to protect box.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.It should be evident that the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is schematic structural view of the invention；
Fig. 2 is filtering body schematic diagram of internal structure in Fig. 1 of the present invention；
In figure:
1, protection box；2, bottom plate；3, accommodating chamber；4, sliding rail；5, sliding block；6, movable block；7, bolt is adjusted；8, limited block；
9, limiting slot；10, rack；11, filtering body；12, fixed frame；13, fixing bolt；14, heat sink；15, heat-dissipating pipe；
16, radiate fence；17, mounting plate；18, intake stack；19, Air Filter；20, dust cover；21, first filter；22, the second filter
Wave device；23, cable；24, shielded layer；25, reinforcing rib；26, wind pipe.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
A kind of Novel Filter and its isolation structure, as depicted in figs. 1 and 2, including protection box 1 and bottom plate 2, protection box 1
Interior and the opposite place of bottom plate 2 are equipped with accommodating chamber 3, and bottom is fixed with sliding rail 4 in accommodating chamber 3, slidably connects cunning on sliding rail 4
Block 5 is fixed with movable block 6 on sliding block 5, and movable block 6 is threadedly coupled with bolt 7 is adjusted, movable block 6 with through 1 inner wall of protection box
Limited block 8 it is fixed, 2 side wall of bottom plate is equipped with the limiting slot 9 cooperated with limited block 8；
It is fixed with rack 10 on bottom plate 2, filtering body 11 is fixed on rack 10, is set inside filtering body 11
There are first filter 21, second filter 22, be electrically connected between first filter 21 and second filter 22 by cable 23,
The shielded layer 24 fixed with 11 inner wall of filtering body is equipped with outside first filter 21, second filter 22；
Fixed frame 12 is equipped with above filtering body 11,12 sidewall thread of fixed frame is connected with fixing bolt 13, fixed frame
Heat sink 14 is fixed on 12, running through inside heat sink 14 has heat-dissipating pipe 15, and heat sink 14 passes through heat dissipation fence 16 and mounting plate
17 are connected and fixed, opposite on mounting plate 17 to offer mounting hole, and radiator fan, 1 side of protection box are fixedly installed with inside mounting hole
Wall is opposite to run through and is fixed with intake stack 18, and 1 top of protection box place opposite with radiator fan runs through and is fixed with wind pipe
26, intake stack 18,26 outer end of wind pipe are respectively and fixedly provided with dust cover 20, fix inside intake stack 18, wind pipe 26
There is Air Filter 19.
It adjusts bolt 7 and 1 side wall of protection box is rotatablely connected.
It adjusts bolt 7 and 1 side wall contact position of protection box is equipped with bearing, adjust and grind off screw thread at bolt 7 and bearing touch.
First filter 21, second filter 22 over and under be equipped with the screening cover fixed with shielded layer 24.
Reinforcing rib 25 is fixed between shielded layer 24.
Heat-dissipating pipe 15 is uniformly arranged in the shape of a spiral inside heat sink 14.
Fixed frame 12, heat sink 14 are all made of Heat Conduction Material and are made.
Using shielded layer 24 by first filter 21 and 22 Isolated Shield of second filter, Isolated Shield effect is effectively improved
Fruit, the setting of reinforcing rib 25 can be improved the structural strength of filtering body 11.
Fixed frame 12 and heat sink 14 can export the heat generated when filtering body 11 works, the heat dissipation in mounting hole
Fan can suck outside air inside protection box 1 from intake stack 18, and blow out from wind pipe 26, so as to anti-
It is distinguished and admirable that flowing is formed inside shield box 1, and the operating temperature of filtering body 11 is effectively reduced.The setting of Air Filter 19 and dust cover 20
It can prevent external dust when heat dissipation from entering inside protection box 1.
When needing to overhaul filtering body 11, screws and adjust bolt 7, in the mating reaction of sliding rail 4 and sliding block 5
Under, movable block 6 drives limited block 8 to be displaced outwardly, to release locking of the limited block 8 to limiting slot 9, dismounting protection box 1 is very
It is convenient.
First filter 21, second filter 22 over and under be equipped with the screening cover fixed with shielded layer 24, energy
It enough further increases to first filter 21, the Isolated Shield effect of second filter 22.
A kind of Novel Filter and its isolation structure provided by the present invention utilize shielded layer by first filter and second
Filter Isolated Shield, effectively improves Isolated Shield effect, and the setting of reinforcing rib can be improved the structural strength of filtering body；
The heat that generates when fixed frame and heat sink can export filtering body work, radiator fan in mounting hole can will be external
Air is blown out inside intake stack sucking protection box from wind pipe, so as to form flowing wind inside protection box
Stream, is effectively reduced the operating temperature of filtering body, when the setting of Air Filter and dust cover can prevent heat dissipation external dust into
Enter inside protection box；When needing to overhaul filtering body, adjusting bolt is screwed, in the mating reaction of sliding rail and sliding block
Under, movable block drives limited block to be displaced outwardly, to release locking of the limited block to limiting slot, dismounting protection box is very convenient.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, can't be such that the essence of corresponding technical solution departs from the spirit and scope of the technical scheme of various embodiments of the present invention.
Claims (7)
1. a kind of Novel Filter and its isolation structure, including protection box (1) and bottom plate (2), it is characterised in that: the protection box
(1) interior and bottom plate (2) opposite place are equipped with accommodating chamber (3), and the interior bottom of the accommodating chamber (3) is fixed with sliding rail (4), described
It slidably connects on sliding rail (4) sliding block (5), is fixed with movable block (6) on the sliding block (5), the movable block (6) and adjusting spiral shell
Bolt (7) is threadedly coupled, and the movable block (6) and the limited block (8) through the protection box (1) inner wall are fixed, the bottom plate (2)
Side wall is equipped with the limiting slot (9) cooperated with the limited block (8)；
It is fixed with rack (10) on the bottom plate (2), is fixed with filtering body (11), the filter on the rack (10)
It is equipped with first filter (21), second filter (22) inside wave device ontology (11), the first filter (21) and described the
It is electrically connected between two filters (22) by cable (23), the first filter (21), second filter (22) are external
Equipped with the shielded layer (24) fixed with the filtering body (11) inner wall；
Fixed frame (12) are equipped with above the filtering body (11), fixed frame (12) sidewall thread is connected with fixing bolt
(13), it is fixed with heat sink (14) on the fixed frame (12), running through inside the heat sink (14) has heat-dissipating pipe (15), described
Heat sink (14) is connected and fixed by heat dissipation fence (16) with mounting plate (17), opposite on the mounting plate (17) to offer installation
Hole is fixedly installed with radiator fan inside the mounting hole, and protection box (1) side wall is opposite to be run through and be fixed with intake stack
(18), place opposite with the radiator fan runs through and is fixed with wind pipe (26), the blast pipe at the top of the protection box (1)
Road (18), wind pipe (26) outer end are respectively and fixedly provided with dust cover (20), and the intake stack (18), wind pipe (26) are internal
It is fixed with Air Filter (19).
2. Novel Filter according to claim 1 and its isolation structure, it is characterised in that: the adjusting bolt (7) with
Protection box (1) the side wall rotation connection.
3. Novel Filter according to claim 2 and its isolation structure, it is characterised in that: the adjusting bolt (7) with
Protection box (1) the side wall contact position is equipped with bearing, grinds off screw thread at the adjusting bolt (7) and the bearing touch.
4. Novel Filter according to claim 1 and its isolation structure, it is characterised in that: the first filter
(21), the screening cover fixed with the shielded layer (24) is equipped with over and under second filter (22).
5. Novel Filter according to claim 1 and its isolation structure, it is characterised in that: between the shielded layer (24)
It is fixed with reinforcing rib (25).
6. Novel Filter according to claim 1 and its isolation structure, it is characterised in that: the heat-dissipating pipe (15) is in spiral shell
It is internal that rotation shape is uniformly arranged on the heat sink (14).
7. Novel Filter according to claim 1 and its isolation structure, it is characterised in that: the fixed frame (12) dissipates
Hot plate (14) is all made of Heat Conduction Material and is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910381766.1A CN109981068B (en) | 2019-05-08 | 2019-05-08 | Novel filter and isolation structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910381766.1A CN109981068B (en) | 2019-05-08 | 2019-05-08 | Novel filter and isolation structure thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109981068A true CN109981068A (en) | 2019-07-05 |
| CN109981068B CN109981068B (en) | 2024-03-01 |
Family
ID=67073244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910381766.1A Active CN109981068B (en) | 2019-05-08 | 2019-05-08 | Novel filter and isolation structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109981068B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130115A (en) * | 2020-01-16 | 2020-05-08 | 成都宏科微波通信有限公司 | Filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03265193A (en) * | 1990-03-15 | 1991-11-26 | Fujitsu Ltd | Air filter |
| CN201656757U (en) * | 2009-12-29 | 2010-11-24 | 西安开容电子技术有限责任公司 | Multi-path input/output AC/DC power supply and signal wire filtering filter |
| JP2016103623A (en) * | 2014-11-27 | 2016-06-02 | ツーハイ アドバンスド チップ キャリアーズ アンド エレクトロニック サブストレート ソリューションズ テクノロジーズ カンパニー リミテッド | Polymer frame used for chip and comprising at least one via in series with capacitor |
| US20170188491A1 (en) * | 2014-05-27 | 2017-06-29 | Katherein-Werke Kg | High-frequency shielded housing, in particular high-frequency shielded filter housing |
| CN107820384A (en) * | 2017-11-13 | 2018-03-20 | 戴承萍 | A kind of isolation structure of wave filter and wave filter |
| RU2656443C1 (en) * | 2017-12-05 | 2018-06-05 | Олег Савельевич Кочетов | Acoustic dust collection installation with cassette filter |
| CN109195415A (en) * | 2018-10-19 | 2019-01-11 | 苏州昇攀新材料技术有限公司 | A kind of radiator of filter |
| CN109246948A (en) * | 2018-09-27 | 2019-01-18 | 上海触界数码科技有限公司 | Intelligent central control system is controlled in PLC |
| KR101962136B1 (en) * | 2018-01-23 | 2019-03-26 | (합)동양아이텍 | Portable case with function of blocking electromagnetic pulse |
| CN209608619U (en) * | 2019-05-08 | 2019-11-08 | 合肥博元电子科技有限公司 | A kind of Novel Filter and its isolation structure |
-
2019
- 2019-05-08 CN CN201910381766.1A patent/CN109981068B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03265193A (en) * | 1990-03-15 | 1991-11-26 | Fujitsu Ltd | Air filter |
| CN201656757U (en) * | 2009-12-29 | 2010-11-24 | 西安开容电子技术有限责任公司 | Multi-path input/output AC/DC power supply and signal wire filtering filter |
| US20170188491A1 (en) * | 2014-05-27 | 2017-06-29 | Katherein-Werke Kg | High-frequency shielded housing, in particular high-frequency shielded filter housing |
| JP2016103623A (en) * | 2014-11-27 | 2016-06-02 | ツーハイ アドバンスド チップ キャリアーズ アンド エレクトロニック サブストレート ソリューションズ テクノロジーズ カンパニー リミテッド | Polymer frame used for chip and comprising at least one via in series with capacitor |
| CN107820384A (en) * | 2017-11-13 | 2018-03-20 | 戴承萍 | A kind of isolation structure of wave filter and wave filter |
| RU2656443C1 (en) * | 2017-12-05 | 2018-06-05 | Олег Савельевич Кочетов | Acoustic dust collection installation with cassette filter |
| KR101962136B1 (en) * | 2018-01-23 | 2019-03-26 | (합)동양아이텍 | Portable case with function of blocking electromagnetic pulse |
| CN109246948A (en) * | 2018-09-27 | 2019-01-18 | 上海触界数码科技有限公司 | Intelligent central control system is controlled in PLC |
| CN109195415A (en) * | 2018-10-19 | 2019-01-11 | 苏州昇攀新材料技术有限公司 | A kind of radiator of filter |
| CN209608619U (en) * | 2019-05-08 | 2019-11-08 | 合肥博元电子科技有限公司 | A kind of Novel Filter and its isolation structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130115A (en) * | 2020-01-16 | 2020-05-08 | 成都宏科微波通信有限公司 | Filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109981068B (en) | 2024-03-01 |
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