CN207426091U - A kind of anti-CDMA interference filters of GSM - Google Patents
A kind of anti-CDMA interference filters of GSM Download PDFInfo
- Publication number
- CN207426091U CN207426091U CN201721318087.2U CN201721318087U CN207426091U CN 207426091 U CN207426091 U CN 207426091U CN 201721318087 U CN201721318087 U CN 201721318087U CN 207426091 U CN207426091 U CN 207426091U
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- China
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- interference filters
- gsm
- cdma interference
- cavity
- cdma
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Abstract
The utility model discloses a kind of anti-CDMA interference filters of GSM, 889 960MHz of frequency coverage.Resonant column is provided in filter cavity body, flies bar, medium, water proof ring, cover board and DINd type connector, the resonant column is into hexagonal symmetry structural arrangement, the winged bar is fixed on medium on cavity, the cavity upper surface and DINd type connector is built-in with the waterproof rubber ring of diameter 2MM, 7 resonant columns are equipped in the filter cavity body, the adjacent resonant column of intracavitary is provided with coupling window.The anti-CDMA interference filters of GSM of the utility model have the characteristics that small size, light weight, low insertion loss, low third order intermodulation, high power.The anti-CDMA interference filters advantageous effects of GSM of the utility model are solve the disadvantage that in the prior art using in line cavity configuration volume is big, weight is excessive, electrical performance indexes are poor.
Description
Technical field
The utility model belongs to field of communication technology, is specifically a kind of anti-CDMA interference filters of GSM.
Background technology
The transmission power of cdma base station uses 870~880 MHz（A Band）.Its first carrier centre frequency is 878.49
MHz（Channel number is 283）.In this case, it will occur to disturb between the net of following several types：The side of CDMA transmitters
Band clutter noise falls into GSM and receives in band；The intermodulation product of CDMA transmitters falls into GSM and receives in band；CDMA hairs outside GSM bands
Penetrating carrier wave causes the sensitivity of GSM receivers to decline.According to the property of interference, CDMA may be defined as the interference of gsm system miscellaneous
Dissipate three kinds of interference, Intermodulation Interference and obstruction interference.
At present, the anti-CDMA interference filters circuit structures of GSM used in the prior art are tied usually using rectangle topology
Structure, it is necessary to more (general 10 chambers of chamber number）And the winged bar used is few（General 2）, overall structure is single, causes wave filter volume
Greatly（The general 120*220*50 of length, width and height）, weight is big（More than 2KG）, the shortcomings of adjustment and installation is difficult, and intermodulation is poor.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of anti-CDMA interference filters of GSM, the wave filter volumes
It is small, weight is small, flexible structure, mutually mixes up, and can be suitably used for indoor or outdoors.
For achieving the above object, the utility model uses following technical scheme：
A kind of anti-CDMA interference filters of GSM fly bar, medium, water proof ring, lid including cavity, 7 resonant columns, 2 capacitives
Plate and DINd type connector；7 resonant columns are arranged in regular hexagon symmetrical structure in the cavity, wherein 6 resonant columns are arranged respectively
6 angles of row hexagon, the resonant column of middle 1 connect magnetic field signal, form the circuit topological structure that 7 chambers 4 inhibit pole, phase
Coupling window is provided between the adjacent resonant column, is connected between the resonant column by coupling screw rod signal, the resonance
Column is connected by tap with DINd type connector；2 winged bars are fixed on medium on cavity, the cavity upper surface and DIN
Waterproof rubber ring is provided on the inside of type connector.
Further, the cavity is integrally formed using die casting, and using ACD12 materials, inner surface is silver-plated.
Further, the cavity upper surface and DINd type connector inside are equipped with the waterproof apron of diameter 2MM.Using
Silica gel material and it is integrally machined shaping
Further, the resonant column uses H59 brass, electroplating surface silver.
Further, the cover board is integrally formed using metal plate punching, and using ACD12 materials, lower surface is silver-plated.
Further, the capacitive fly bar using brass H59 machine it is integrally formed, outer surface is silver-plated.
Further, the DINd type connector shell uses brass H59, electroplate, and joint core uses beryllium table copper, table
Face silver ternary alloy three-partalloy.
Further, the tap is welded on joint, ultimately forms the transmission of signal.
Further, the anti-CDMA interference filters of the GSM include an output port, an input port.
Further, M4 screw rods are installed on the cover board, using brass H59, electroplate.
A kind of anti-CDMA interference filters of GSM of the utility model have small size, light weight, low insertion loss, low three
The advantages that rank intermodulation, high power.Appearance and size is 113*101*50MM, and only the half of existing product volume, weight only have
0.5KG is a quarter of existing product.The anti-CDMA interference filters of GSM of the utility model have small size, light weight,
The features such as low insertion loss, low third order intermodulation, high power.The anti-CDMA interference filters advantageous effects of GSM of the utility model exist
It is arranged in internal 7 resonant columns in regular hexagon symmetrical structure, wherein 6 resonant columns arrange 6 angles of hexagon, middle respectively
1 resonant column connects magnetic field signal, forms the compact circuit topological structure that 7 chambers 4 inhibit pole, solves and adopt in the prior art
With in line chamber rectangle topological structure volume is big, weight is excessive, intermodulation index error, adjustment and installation is difficult the shortcomings that, and can be applicable in
In indoor or outdoors.
Description of the drawings
Fig. 1 is the structure diagram of the anti-CDMA interference filters one embodiment of the utility model GSM.
Specific embodiment
Below in conjunction with the accompanying drawings, CDMA interference filters anti-to the GSM of the utility model are described in detail.
As shown in Figure 1, the anti-CDMA interference filters of the GSM of the utility model, including first and second DINd type connector 1,2,
Resonant column a, resonant column b, DINd type connector waterproof apron 3, M4 screw rods 4, inner cover plate 5, outer waterproof cover 6, mounting hole 7, cover board
M3 screws 8, cavity waterproof apron 9 fly bar 10, medium 11 and tap, a height of 113*101*50MM of length and width.
In the present embodiment, cavity is rectangle, and length and width are a height of：113*101*50mm, the cavity four corners have mounting hole, directly
Footpath is 4.5mm.Cavity is integrally formed using die casting, and using ACD12 materials, inner surface is silver-plated.Wave filter has resonant column a and resonance
Column b, totally 7,7 resonant columns are arranged in regular hexagon symmetrical structure.Wherein 6 resonant columns arrange 6 angles of hexagon respectively,
The resonant column of middle 1 connects magnetic field signal, forms the circuit topological structure that 7 chambers 4 inhibit pole.Resonant column a and resonant column b
Total a height of 32mm, overall diameter 12mm, interior diameter 10mm, disk thickness 2mm, disk overall diameter are respectively 18mm and 20mm, are used
H59 brass, electroplating surface silver.It is fixed on using M4 screws 4 on cavity, the space of a sealing is formed below in inner cover plate 5 and cavity
Tap 12 is respectively welded above first and second DINd type connector 1,2.Cover board is rectangle, and length and width are a height of：113*101*3mm is adopted
Integrally formed with metal plate punching, using ACD12 materials, lower surface is silver-plated.M4 screw rods 4 are mounted on above inner cover plate 5.
First capacitive flies 2 and second capacitive of bar and flies 10 end of bar as diameter 10mm, and thickness is the disk of 3mm, and centre is diameter
3mm, the cylinder of long 12mm, integrally formed using brass H59 machinings, outer surface is silver-plated.Second capacitive flies bar 10 and uses medium
11 are fixed on cavity.Water proof ring 3 and 9 is built on din connector and cavity respectively.The outer screw 8 of waterproof cover 6 above cavity
It is fixed.Cavity, cover board, resonant column fly bar, equal 5 silver medal 3 of copper facing of DINd type connector shell, joint core plating ternary alloy three-partalloy, cavity four
There is mounting hole 7 week.
The anti-CDMA interference filters of GSM of the utility model are by by cavity, resonant column step and mounting hole die casting one
Shaping, product sealing signal can be better than the index of client, while need not in addition process resonant column and mounting hole, reduce
Cost and difficulty of processing, shorten the delivery cycle, and the utility model third order intermodulation inhibits cdma system up to more than 155dbc
Up to 65dB, standing-wave ratio is below 1.2, and volume only has 113*101*50mm.
There are many concrete application approach of the present invention, the above is only the preferred embodiment of the present invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the principle of the present invention, several improvement can also be made, these change
Into also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of anti-CDMA interference filters of GSM, it is characterised in that：Including cavity, 7 resonant columns, 2 capacitives fly bar, medium,
Water proof ring, cover board and DINd type connector；7 resonant columns are arranged in regular hexagon symmetrical structure in the cavity, wherein 6 humorous
The column that shakes arranges 6 angles of hexagon respectively, and the resonant column of middle 1 connects magnetic field signal, forms the circuit that 7 chambers 4 inhibit pole
Topological structure；Coupling window is provided between the adjacent resonant column, is connected between the resonant column by coupling screw rod signal
It connects, the resonant column is connected by tap with DINd type connector；2 winged bars are fixed on medium on cavity, the cavity
Waterproof rubber ring is provided on the inside of upper surface and DINd type connector.
2. the anti-CDMA interference filters of GSM according to claim 1, it is characterised in that：The cavity be rectangle, the chamber
Body four corners have mounting hole, and the cover board corresponds to jagged；The cavity is integrally formed using die casting, interior using ACD12 materials
Electroplate.
3. the anti-CDMA interference filters of GSM according to claim 1, it is characterised in that：The cavity upper surface and DINd type
The waterproof apron of diameter 2MM is installed on the inside of connector.
4. the anti-CDMA interference filters of GSM according to claim 1, it is characterised in that：The resonant column is yellow using H59
Copper, electroplating surface silver.
5. the anti-CDMA interference filters of GSM according to claim 1, it is characterised in that：The cover board uses metal plate punching
Integrally formed, using ACD12 materials, lower surface is silver-plated.
6. the anti-CDMA interference filters of GSM according to claim 1, it is characterised in that：The capacitive flies bar using brass
H59 wash processing it is integrally formed, outer surface is silver-plated.
7. the anti-CDMA interference filters of GSM according to claim 1, it is characterised in that：The DINd type connector shell is adopted
With brass H59, electroplate, joint core uses beryllium table copper, surface silver ternary alloy three-partalloy.
8. the anti-CDMA interference filters of GSM according to claim 1, it is characterised in that：The tap is welded on joint,
Ultimately form the transmission of signal.
9. the anti-CDMA interference filters of GSM according to claim 1, it is characterised in that：The anti-CDMA interference filters of GSM
Device includes an output port, an input port.
10. the anti-CDMA interference filters of GSM according to claim 1, it is characterised in that：M4 spiral shells are installed on the cover board
Bar, using brass H59, electroplate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721318087.2U CN207426091U (en) | 2017-10-13 | 2017-10-13 | A kind of anti-CDMA interference filters of GSM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721318087.2U CN207426091U (en) | 2017-10-13 | 2017-10-13 | A kind of anti-CDMA interference filters of GSM |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207426091U true CN207426091U (en) | 2018-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721318087.2U Expired - Fee Related CN207426091U (en) | 2017-10-13 | 2017-10-13 | A kind of anti-CDMA interference filters of GSM |
Country Status (1)
| Country | Link |
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| CN (1) | CN207426091U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537802A (en) * | 2020-05-25 | 2020-08-14 | 上海交通大学 | Method for rapidly extracting liquid conductivity parameters |
-
2017
- 2017-10-13 CN CN201721318087.2U patent/CN207426091U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111537802A (en) * | 2020-05-25 | 2020-08-14 | 上海交通大学 | Method for rapidly extracting liquid conductivity parameters |
| CN111537802B (en) * | 2020-05-25 | 2021-05-28 | 上海交通大学 | Method for rapidly extracting liquid conductivity parameters |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180529 Termination date: 20211013 |
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| CF01 | Termination of patent right due to non-payment of annual fee |