CN210155368U - Shielding anti-interference device - Google Patents
Shielding anti-interference device Download PDFInfo
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- CN210155368U CN210155368U CN201921105325.0U CN201921105325U CN210155368U CN 210155368 U CN210155368 U CN 210155368U CN 201921105325 U CN201921105325 U CN 201921105325U CN 210155368 U CN210155368 U CN 210155368U
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- light receiving
- receiving device
- shielding
- port
- optical fiber
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Abstract
The utility model provides a shield anti jamming unit belongs to optical fiber communication technical field, including PCB board and BOSA subassembly, the BOSA subassembly includes light emission device, light receiving device, optic fibre and BASE casing, the both ends of BASE casing are located to light emission device and optic fibre branch, the side of BASE casing is located to light receiving device, light emission device and light receiving device are connected with the PCB board, the BASE casing has the shield cover that extends to the PCB board along light receiving device's transmission direction, the free end of shield cover extends to and pastes mutually with the surface of PCB board, light receiving device is enclosed in the shield cover. The utility model provides a shielding anti jamming unit directly sets up the shield cover of extension in the side of BASE casing, and the shield cover surrounds the shielding completely with light receiving element, through shielding light receiving element, avoids the signal to receive external WIFI's interference, improves the reliability of BOSA subassembly work.
Description
Technical Field
The utility model belongs to the technical field of fiber communication, more specifically say, relate to a shielding anti jamming unit.
Background
Optical fiber communication has become a mainstream communication technology in recent years, and is a method for transmitting information by optical wave using photoelectric conversion, and is characterized by large capacity, high speed, and strong security, and is not easily interfered by external signals like satellite communication. At present, the internet access in China basically realizes optical fiber communication, optical fiber communication coverage is also realized in most scientific research and production fields, and the optical fiber communication plays a greater role with the coming of modern artificial intelligence, big data and other trends.
Referring to fig. 7, when the BOSA is used as an optical transceiver module, it is very easily interfered by a close-range WIFI signal in a working state, and mainly an optical receiver is interfered, which causes an abnormal working state and even stops working.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a shielding anti jamming unit to the BOSA structure interference killing feature who exists among the solution prior art is poor to cause the work to rise and stop unusual technical problem.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a shielding anti jamming unit, includes PCB board and BOSA subassembly, the BOSA subassembly includes light emitting device, light receiving device, optic fibre and BASE casing, light emitting device with optic fibre branch is located the both ends of BASE casing, light receiving device locates the side of BASE casing, light emitting device with light receiving device with the PCB board is connected, the BASE casing has along light receiving device's transmission direction to the shield cover that the PCB board extends, the free end of shield cover extend to with the surface of PCB board pastes mutually, light receiving device is enclosed in the shield cover.
Further, the cross section of the shielding case is circular or rectangular.
Further, an optical fiber collimator is arranged at one end of the optical fiber, which is connected with the BASE shell.
Furthermore, two ends of the BASE shell are respectively provided with an emission port for connecting the light emitting device and an input/output port for connecting the optical fiber, a side surface of the BASE shell is provided with a light receiving port for inserting the light receiving device, center lines of the emission port and the input/output port are overlapped, and a center line of the light receiving port is perpendicular to a center line of the emission port and/or the input/output port.
Further, the light emitting device is inserted into the emission port with tight fit and fixed by laser welding.
Further, the inner wall and the outer wall of the emission port are provided with steps with different diameters.
Further, the light emitting device is a photo light emitting diode.
Further, the light receiving device is a photo-light emitting diode.
The utility model provides a shielding anti jamming unit's beneficial effect lies in: compared with the prior art, the utility model discloses shielding anti jamming unit directly sets up the shield cover of extension in the side of BASE casing, and the shield cover surrounds the shielding completely with the part before light receiving device is connected with the PCB board, through shielding light receiving device, avoids receiving external WIFI's interference from the PCB board through light receiving device's signal, improves the reliability of BOSA subassembly work.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic front view of a shielding anti-interference device according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of a shielding anti-interference device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a split state of the shielding anti-interference apparatus according to an embodiment of the present invention;
fig. 4 is a first schematic perspective view of the BASE enclosure of fig. 1;
fig. 5 is a second schematic perspective view of the BASE shell of fig. 1;
fig. 6 is a third schematic perspective view of the BASE shell of fig. 1;
fig. 7 is a schematic front view of a shielding and anti-interference device provided in the prior art.
Wherein, in the figures, the respective reference numerals:
1-an optical fiber; 2-BASE shell; 21-a shield; 22-a transmit port; 23-input-output port; 24-a light receiving port; 3-a light emitting device; 4-a PCB board; 5-light receiving device.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to fig. 3, the shielding and anti-interference device of the present invention will now be described. The shielding anti-jamming device comprises a PCB (printed circuit board) 4 and a BOSA (biaxially oriented polystyrene) assembly, wherein the BOSA assembly comprises a light emitting device 3, a light receiving device 5, an optical fiber 1 and a BASE shell 2, the light emitting device 3 and the optical fiber 1 are respectively arranged at two ends of the BASE shell 2, the light receiving device 5 is arranged on the side surface of the BASE shell 2, the light emitting device 3 and the light receiving device 5 are connected with the PCB 4, the BASE shell 2 is provided with a shielding case 21 extending from the PCB 4 along the transmission direction of the light receiving device 5, the free end of the shielding case 21 extends to be attached to the surface of the PCB 4, and the light receiving device 5 is enclosed in the shielding case 21.
The utility model provides a shielding anti jamming unit compares with prior art, directly sets up the shield cover 21 of extension in the side of BASE casing 2, and shield cover 21 surrounds the shielding completely with the part before light receiving device 5 is connected with PCB board 4, through shielding light receiving device 5, avoids receiving external WIFI's interference from PCB board 4 through light receiving device 5's signal, improves the reliability of BOSA subassembly work.
The length of the shielding case 21 depends on the position of the PCB 4 connected to the light receiving device 5, so as to ensure that the light receiving device 5 located on one side of the BASE housing 2 is completely enclosed in the shielding case 21 after the light receiving device 5 is connected to the PCB 4, thereby shielding the interference signal. For the BOSA assembly, the length of the exposed lead section of the light receiving device 5 after the extension of the shield case 21 needs to have an exposed end after passing through the PCB board 4. The BASE case is a fixed metal structure combining a light receiving device, a light emitting device, and an optical fiber, and is called a BASE case.
Referring to fig. 1 to fig. 6, as an embodiment of the shielding anti-interference device of the present invention, the cross section of the shielding cover 21 is circular or rectangular. The shape of the shield case 21 may be determined according to the outer shape of the BASE case 2, and in the present embodiment, the side surface connected to the light receiving device 5 has a square structure, and thus the shield case 21 directly extends to have a rectangular cross section according to the situation.
Referring to fig. 1 to fig. 3, as a specific embodiment of the shielding anti-interference device of the present invention, an optical fiber 1 collimator is disposed at one end of the optical fiber 1 connected to the BASE housing 2. The optical fiber 1 collimator is formed by accurately positioning a tail fiber and a self-focusing lens. It can convert the transmitted light in the optical fiber 1 into collimated light (parallel light) or couple external parallel light (approximately parallel) into the single-mode optical fiber 1.
Referring to fig. 4 to 6, as a specific embodiment of the shielding and anti-interference device provided by the present invention, two ends of the BASE housing 2 are respectively provided with an emitting port 22 for connecting the light emitting device 3 and an input/output port 23 for connecting the optical fiber 1, a side of the BASE housing 2 is provided with a light receiving port 24 for inserting the light receiving device 5, center lines of the emitting port 22 and the input/output port 23 coincide, and a center line of the light receiving port 24 is perpendicular to a center line of the emitting port 22 and/or the input/output port 23.
Referring to fig. 1 to fig. 2, as a specific embodiment of the shielding anti-interference device provided by the present invention, the light emitting device 3 is inserted into the emitting port 22 in a close fit manner and fixed by laser welding.
Referring to fig. 4 and 5, as a specific embodiment of the shielding anti-interference device of the present invention, the inner wall and the outer wall of the transmitting port 22 are provided with steps with different diameters. The inner wall is adapted to be connected to the light emitting device 3.
As a specific implementation manner of the shielding anti-interference device provided by the present invention, the light emitting device 3 is a photo-electric light emitting diode, and the light emitting device 3 couples the light emitting power of the light emitting diode to the optical fiber 1 collimator.
As a specific embodiment of the shielding anti-interference device provided in the present invention, the light receiving device 5 is a photo led. And converting the parallel light optical signal into an electric signal.
The utility model provides a to receiving device 5 formation structure that surrounds entirely, can prevent external WIFI signal interference. The comparative data are as follows:
two test methods commonly used in the industry at present are adopted: the actual value and the fixed optical power are tested, and the WIFI interference resistance is verified by two test methods, which are shown in the following two tables:
by comparing the two test methods described above, the following conclusions can be drawn:
referring to the existing industry standards: within 3cm of the antenna from the tested device, the WIFI power is greater than 15dBm, and the requirements are as follows: the sensitivity deterioration is less than 2dBm, and if step loss occurs, the device is failed due to overlarge received interference.
Conclusion 1: the 10G PON can reach the anti-WIFI interference standard in the current industry after the utility model is adopted;
conclusion 2: 2.5G PON adopts the utility model discloses can reach the current industry in anti WIFI standard and anti WIFI interference effect is splendid afterwards.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The shielding anti-interference device comprises a PCB and a BOSA assembly, wherein the BOSA assembly comprises a light emitting device, a light receiving device, an optical fiber and a BASE shell, the light emitting device and the optical fiber are respectively arranged at two ends of the BASE shell, the light receiving device is arranged on the side surface of the BASE shell, the light emitting device and the light receiving device are connected with the PCB, and the shielding anti-interference device is characterized in that the BASE shell is provided with a shielding cover which extends towards the PCB along the transmission direction of the light receiving device, the free end of the shielding cover extends to be attached to the surface of the PCB, and the light receiving device is enclosed in the shielding cover.
2. The apparatus according to claim 1, wherein said shielding enclosure is circular or rectangular in cross-section.
3. The apparatus according to claim 1, wherein an optical fiber collimator is provided at an end of said optical fiber connected to said BASE enclosure.
4. The shielding and anti-interference device according to any one of claims 1 to 3, wherein both ends of said BASE housing are respectively provided with a transmitting port for connecting said optical transmitter and an input/output port for connecting said optical fiber, and a side surface of said BASE housing is provided with an optical receiver port for inserting said optical receiver, and center lines of said transmitting port and said input/output port are coincident, and a center line of said optical receiver port is perpendicular to a center line of said transmitting port and/or said input/output port.
5. The shielded tamper-resistant device of claim 4, wherein the light emitting device is inserted into the emission port with a tight fit and secured by laser welding.
6. The shielded noise immunity device of claim 4 wherein both the inner and outer walls of said transmission port are provided with steps of different diameters.
7. The shielded tamper resistant device of claim 1 wherein said light emitting device is a photo-emitting diode.
8. The shielded noise immunity device of claim 1 wherein said light receiving device is a photo-luminescent diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921105325.0U CN210155368U (en) | 2019-07-15 | 2019-07-15 | Shielding anti-interference device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921105325.0U CN210155368U (en) | 2019-07-15 | 2019-07-15 | Shielding anti-interference device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210155368U true CN210155368U (en) | 2020-03-17 |
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ID=69765962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921105325.0U Expired - Fee Related CN210155368U (en) | 2019-07-15 | 2019-07-15 | Shielding anti-interference device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210155368U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021027455A1 (en) * | 2019-08-09 | 2021-02-18 | 烽火通信科技股份有限公司 | Bi-directional optical sub-assembly with anti-interference performance, and bob optical module |
-
2019
- 2019-07-15 CN CN201921105325.0U patent/CN210155368U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021027455A1 (en) * | 2019-08-09 | 2021-02-18 | 烽火通信科技股份有限公司 | Bi-directional optical sub-assembly with anti-interference performance, and bob optical module |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200317 Termination date: 20210715 |
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| CF01 | Termination of patent right due to non-payment of annual fee |