CN202077030U - WiFi remote-end access point and radio over fiber (RoF) switching system - Google Patents
WiFi remote-end access point and radio over fiber (RoF) switching system Download PDFInfo
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- CN202077030U CN202077030U CN2011201703311U CN201120170331U CN202077030U CN 202077030 U CN202077030 U CN 202077030U CN 2011201703311 U CN2011201703311 U CN 2011201703311U CN 201120170331 U CN201120170331 U CN 201120170331U CN 202077030 U CN202077030 U CN 202077030U
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Abstract
The utility model discloses a WiFi remote-end access point comprising a fiber port, a photoelectric/electro-optical conversion module, a power amplifier, a low noise amplifier, a transmitting antenna and a receiving antenna, wherein the fiber port is connected with the photoelectric/electro-optical conversion module to facilitate the transmission of ascending and descending optical signals, the photoelectric/electro-optical conversion module comprises an electro-optical conversion unit and a photoelectric conversion unit, the power amplifier is connected with the photoelectric conversion unit, the low noise amplifier is connected with the photoelectric conversion unit, the transmitting antenna is connected with an output terminal of the power amplifier, and the receiving antenna is connected with an input terminal of the low noise amplifier. Simultaneously, the utility model provides a radio over fiber (RoF) switching system comprising the WiFi remote-end access point. The remote-end access point adopts the transmitting antenna and the receiving antenna which are separated from each other, so that multiple paths of radio frequency signals can be simultaneously received and transmitted. Meanwhile, the remote-end access point is simple in structure and low in cost.
Description
[technical field]
The utility model relates to a kind of WiFi far-end access point and light-carried wireless switching system
[technical background]
At present, the WiFi WLAN (wireless local area network) becomes more and more universal, has become the preferred option of setting up WLAN (wireless local area network).The user is wirelessly connected to the Internet with terminal equipment such as the notebook computer that wireless network card is installed by the WiFi access point.Yet the signal cover of WiFi access point is narrower, is generally: indoor coverage is generally 50～100 meters; And outdoor coverage is generally 100～150 meters.This narrower coverage has limited applying of WiFi WLAN (wireless local area network) to a certain extent.
In order to enlarge the coverage of WiFi signal, generally take to strengthen radiant power, employing optical fiber or the cable transmission WiFi signal of WiFi equipment or the method for increase WiFi transmission range.
At first, WiFi adopts ISM band, so its radiant power is restricted, and like this, just is restricted by strengthening the method that WiFi radiation of equipment power enlarges the WiFi signal cover.
Secondly, the distance of cable transmission WiFi radiofrequency signal is very short, has only usually about 200 meters, therefore adopts wire cable to improve the DeGrain of the coverage of WiFi signal.
At present, because the price of optical fiber is more and more cheap, beginning one's study in the industry increases the WiFi signal cover by Optical Fiber Transmission under the rational prerequisite of cost, and in theory, the method for employing mainly contains following several.
By the Optical Fiber Transmission base band data, connect far-end WiFi access point.The far-end access point receives base band data, by data processing, modulation, frequency conversion, power amplification, goes out by aerial radiation again.The far-end access point function complexity of this scheme is unfavorable for system management and upgrading.
By Optical Fiber Transmission WiFi intermediate-freuqncy signal, after the far-end access point received signal,, go out by aerial radiation again through frequency conversion, power amplification.This scheme far-end access point still needs complicated local oscillator, frequency converter and filter.
Therefore, be necessary to provide a kind of WiFi far-end access point and light-carried wireless switching system of realizing by optical fiber, so that overcome the shortcoming and deficiency of above-mentioned prior art.
[utility model content]
The purpose of this utility model is to provide a kind of WiFi far-end access point and light-carried wireless switching system of realizing by optical fiber, it utilizes photoelectricity/electrooptic conversion module, microwave power amplifier, low noise amplifier, transmitting antenna, reception antenna to constitute, thereby can receive and dispatch a plurality of radiofrequency signals by a pair of antenna disconnected from each other.
For realizing this purpose, the utility model adopts following technical scheme:
A kind of WiFi far-end access point comprises fiber port, photoelectricity/electrooptic conversion module, power amplifier, low noise amplifier, transmitting antenna and reception antenna.Fiber port is connected with photoelectricity/electrooptic conversion module, so that transmission uplink and downlink light signal; Photoelectricity/electrooptic conversion module comprises electricity/optical conversion element and light/electric converting unit; Power amplifier is connected with light/electric converting unit; Low noise amplifier is connected with light/electric converting unit; Transmitting antenna is connected with the output of power amplifier; Reception antenna is connected with the input of low noise amplifier.
A kind of light-carried wireless switching system comprises WiFi light-carried wireless switch and WiFi far-end access point.Described WiFi light-carried wireless switch comprises three WiFi access points, be used to receive and dispatch three transmitting-receiving separating switch, two 3 * 3 switch matrix that are connected with described transmitting-receiving separating switch from the signal of WiFi access point, reach three photoelectricity/electrooptic conversion modules that are connected with described two switch matrix; Described WiFi far-end access point comprises fiber port, photoelectricity/electrooptic conversion module, power amplifier, low noise amplifier, transmitting antenna and reception antenna, wherein, described fiber port is connected with photoelectricity/electrooptic conversion module, so that transmission uplink and downlink light signal; Described photoelectricity/electrooptic conversion module comprises electricity/optical conversion element and light/electric converting unit; Described power amplifier is connected with described light/electric converting unit; Described low noise amplifier is connected with described light/electric converting unit; Described transmitting antenna is connected with the output of power amplifier; Described reception antenna is connected with the input of low noise amplifier; Three photoelectricity/electrooptic conversion modules of described WiFi light-carried wireless switch are connected with the fiber port of described WiFi far-end access point respectively.
Compared with prior art, the utlity model has following advantage:
Because the far-end access point adopts the antenna that transmits and receives disconnected from each other, receive when therefore can finish the multi-channel rf signal and emission.Both can launch, receive multichannel WiFi radiofrequency signal simultaneously, also can launch, receive WiFi radiofrequency signal and 2G/3G/4G radiofrequency signal simultaneously.Simultaneously, the far-end access point is simple in structure, with low cost.
[description of drawings]
Fig. 1 is the structured flowchart according to the WiFi far-end access point of an embodiment of the utility model;
Fig. 2 is the structured flowchart that comprises the light-carried wireless switching system of WiFi far-end access point shown in Figure 1.
[embodiment]
Generally, in the utility model, by Optical Fiber Transmission WiFi radiofrequency signal, WiFi far-end access point only need pass through power amplification, light/electricity conversion, electricity/the light conversion can be received and dispatched multiple signals, so the perfect in shape and function of WiFi far-end access point and simple in structure.Simultaneously, the access of WiFi signal, authentication and management are all finished in control centre, so the management of system and upgrade very convenient.
Below in conjunction with drawings and Examples the utility model is further described.
With reference to figure 1, comprise fiber port 101, photoelectricity/electrooptic conversion module 102, power amplifier 103, low noise amplifier 104, transmitting antenna 105 and reception antenna 106 according to the WiFi far-end access point of an embodiment of the utility model.
Described fiber port 101 links to each other with photoelectricity/electrooptic conversion module 102, connects light-carried wireless switch and far-end access point by optical fiber, so that transmission uplink and downlink light signal.
Photoelectricity/electrooptic conversion module 102 comprises electricity/optical conversion element and light/electric converting unit.Described electricity/optical conversion element adopts analog radio frequency signal of telecommunication modulated laser, realizes electricity/light conversion; Described light/electric converting unit converts the light signal that receives to the analog radio frequency signal of telecommunication, realizes light/electricity conversion.
Transmitting antenna 105 connects the output of power amplifier 103, is used for the transmitting downstream radiofrequency signal.
Described low noise amplifier 104 is connected with described light/electric converting unit, and described low noise amplifier 104 be used to the achieve a butt joint low noise of the analog radio frequency signal of telecommunication (up) received amplifies.
The light of photoelectricity/electrooptic conversion module 102/electric converting unit, power amplifier 103, transmitting antenna 105 constitute signal emission (descending) passage of far-end access point.Described transmitting (descending) radiate by transmitting antenna 105 after light/electricity conversion, power amplifier 103 amplify.
The signal that the electricity of reception antenna 106, low noise amplifier 104, photoelectricity/electrooptic conversion module 102/optical conversion element constitutes the far-end access point receives (up) passage.The radiofrequency signal that antenna 106 receives is amplified through low noise amplifier 104, converts light signal to by electricity/light modular converter, uploads (up) by fiber port 101.
Preferably, described power amplifier 103 output radio-frequency powers are 100mW.Preferably, the multiplication factor of described low noise amplifier 104 is 30dB.Preferably, the air line distance between described transmitting antenna 105 and the reception antenna 106 is 2～3 meters, and promptly under the frequency of 2500MHz, the isolation between transmitting antenna 105 and the reception antenna 106 is greater than 45dB.
Light-carried wireless switching system according to an embodiment of the utility model is described below.
With reference to figure 2, a kind of light-carried wireless switching system comprises WiFi light-carried wireless switch 200 and WiFi far-end access point.
Described WiFi light-carried wireless switch 200 comprises three WiFi access points 201, is used to receive and dispatch three transmitting-receiving separating switch 203, two 3 * 3 switch matrix 205,206 that are connected with described transmitting-receiving separating switch 203 and three photoelectricity/electrooptic conversion modules that are connected with described two switch matrix from the signal of WiFi access point 201.
Described WiFi far-end access point comprises fiber port 101, photoelectricity/electrooptic conversion module 102, power amplifier 103, low noise amplifier 104, transmitting antenna 105 and reception antenna 106, wherein, described fiber port 101 is connected with photoelectricity/electrooptic conversion module 102, so that transmission uplink and downlink light signal; Described photoelectricity/electrooptic conversion module 102 comprises electricity/optical conversion element and light/electric converting unit; Described power amplifier 103 is connected with described light/electric converting unit; Described low noise amplifier 104 is connected with described light/electric converting unit; Described transmitting antenna 105 is connected with the output of power amplifier 103; Described reception antenna 106 is connected with the input of low noise amplifier 104.
Three photoelectricity/electrooptic conversion modules of described WiFi light-carried wireless switch 200 are connected with the fiber port 101 of described WiFi far-end access point respectively.
Three WiFi access points 201 are operated in WiFi 802.11b/g standard, and working channel is respectively 1,6 and 11.
By the full function of exchange of transmitting-receiving separating switch 203 and 3 * 3 switch matrix 205,206, the signal of three WiFi access points 201 can be distributed to any one fiber port 101; Any one fiber port 101 can transmit the signal of three tunnel, two road or one road WiFi access point simultaneously, also can not transmit the signal of any one road WiFi access point.
Far-end access point 230,231,232 with the WiFi radiofrequency signal of WiFi light-carried wireless switch 200 transmitting-receiving at remote processor, and antenna by two separation radiated emission signal (descending) and reception upward signal respectively.
WiFi light-carried wireless switch 200, far-end access point (230,231,232) and the long optical fiber of 200～5000m that connects by fiber port 101, constitute complete, the reconfigurable light-carried wireless switching system of capacity, thereby realized the distribution on a large scale of WiFi wireless signal.
The signal bandwidth of the photoelectricity/electrooptic conversion module 207,102 in the exemplary embodiment of the present utility model is 1600MHz～2700MH.
Preferably, for guaranteeing that the light-carried wireless switching system at the same time during sending and receiving multi-channel rf signal, is independent of each other, the multiplication factor that the power output of power amplifier is not more than 20dBm, low noise amplifier is not more than 30dB.
Preferably, the used optical fiber of described fiber port is monomode fiber.
Because the far-end access point adopts the antenna that transmits and receives disconnected from each other, receive when therefore can finish the multi-channel rf signal and emission.Both can launch, receive multichannel WiFi radiofrequency signal simultaneously, also can launch, receive WiFi radiofrequency signal and 2G/3G/4G radiofrequency signal simultaneously.And the structure of far-end access point is also simple, with low cost.
Above embodiment only in order to the explanation the utility model and and the described technical scheme of unrestricted the utility model; Therefore, although this specification has been described in detail the utility model with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model; And all do not break away from the technical scheme and the improvement thereof of spirit and scope of the present utility model, and it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (8)
1. a WiFi far-end access point is characterized in that comprising fiber port, photoelectricity/electrooptic conversion module, power amplifier, low noise amplifier, transmitting antenna and reception antenna,
Described fiber port is connected with photoelectricity/electrooptic conversion module, so that transmission uplink and downlink light signal;
Described photoelectricity/electrooptic conversion module comprises electricity/optical conversion element and light/electric converting unit;
Described power amplifier is connected with described light/electric converting unit;
Described low noise amplifier is connected with described light/electric converting unit;
Described transmitting antenna is connected with the output of power amplifier;
Described reception antenna is connected with the input of low noise amplifier.
2. WiFi far-end access point according to claim 1 is characterized in that: described power amplifier output radio-frequency power is 100mW.
3. WiFi far-end access point according to claim 1 is characterized in that: the multiplication factor of described low noise amplifier is 30dB.
4. WiFi far-end access point according to claim 1 is characterized in that: the air line distance between described transmitting antenna and the reception antenna is 2～3 meters.
5. WiFi far-end access point according to claim 1 is characterized in that: the signal bandwidth of described photoelectricity/electrooptic conversion module is 1600MHz～2700MH.
6. WiFi far-end access point according to claim 1, it is characterized in that: the power output of described power amplifier is not more than 20dBm, and the multiplication factor of described low noise amplifier is not more than 30dB.
7. WiFi far-end access point according to claim 1 is characterized in that: the used optical fiber of described fiber port is monomode fiber.
8. a light-carried wireless switching system comprises WiFi light-carried wireless switch and WiFi far-end access point, it is characterized in that:
Described WiFi light-carried wireless switch comprises three WiFi access points, be used to receive and dispatch three transmitting-receiving separating switch, two 3 * 3 switch matrix that are connected with described transmitting-receiving separating switch from the signal of WiFi access point, reach three photoelectricity/electrooptic conversion modules that are connected with described two switch matrix;
Described WiFi far-end access point comprises fiber port, photoelectricity/electrooptic conversion module, power amplifier, low noise amplifier, transmitting antenna and reception antenna, wherein, described fiber port is connected with photoelectricity/electrooptic conversion module, so that transmission uplink and downlink light signal; Described photoelectricity/electrooptic conversion module comprises electricity/optical conversion element and light/electric converting unit; Described power amplifier is connected with described light/electric converting unit; Described low noise amplifier is connected with described light/electric converting unit; Described transmitting antenna is connected with the output of power amplifier; Described reception antenna is connected with the input of low noise amplifier;
Three photoelectricity/electrooptic conversion modules of described WiFi light-carried wireless switch are connected with the fiber port of described WiFi far-end access point respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201703311U CN202077030U (en) | 2011-05-24 | 2011-05-24 | WiFi remote-end access point and radio over fiber (RoF) switching system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201703311U CN202077030U (en) | 2011-05-24 | 2011-05-24 | WiFi remote-end access point and radio over fiber (RoF) switching system |
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| Publication Number | Publication Date |
|---|---|
| CN202077030U true CN202077030U (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201703311U Expired - Lifetime CN202077030U (en) | 2011-05-24 | 2011-05-24 | WiFi remote-end access point and radio over fiber (RoF) switching system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664681A (en) * | 2012-04-16 | 2012-09-12 | 广州飞瑞敖电子科技有限公司 | Radio-over-fiber switching system |
| CN102769212A (en) * | 2012-07-24 | 2012-11-07 | 东南大学 | Medium-frequency simulated RoF (radio over fiber) type phase control active integrated antenna |
-
2011
- 2011-05-24 CN CN2011201703311U patent/CN202077030U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664681A (en) * | 2012-04-16 | 2012-09-12 | 广州飞瑞敖电子科技有限公司 | Radio-over-fiber switching system |
| CN102769212A (en) * | 2012-07-24 | 2012-11-07 | 东南大学 | Medium-frequency simulated RoF (radio over fiber) type phase control active integrated antenna |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111214 |
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| CX01 | Expiry of patent term |