CN201766586U - High-power wireless front end - Google Patents
High-power wireless front end Download PDFInfo
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- CN201766586U CN201766586U CN201020270027XU CN201020270027U CN201766586U CN 201766586 U CN201766586 U CN 201766586U CN 201020270027X U CN201020270027X U CN 201020270027XU CN 201020270027 U CN201020270027 U CN 201020270027U CN 201766586 U CN201766586 U CN 201766586U
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Abstract
The utility model provides a high-power wireless front end, which comprises a wireless chip, a transmitting circuit, a switch circuit, an equipment interface and a receiving circuit. The wireless chip is respectively electrically connected with the transmitting circuit, the switch circuit and the receiving circuit, the transmitting circuit is electrically connected with the switch circuit, the switch circuit is electrically connected with the equipment interface, the receiving circuit is electrically connected with the switch circuit, wireless splitting signals modulated by the wireless chip are successively transmitted via the transmitting circuit and the switch circuit and then outputted via the equipment interface, the signals received by the equipment interface are successively transmitted via the switch circuit and the receiving circuit and received via the wireless chip, and power of the amplified and processed signals detected by the transmitting circuit is fed back to the wireless chip. The high-power wireless front end can effectively inhibit spurious signals out of band, lower cost of products and increase stability of products, and is compact and reasonable in circuit structure.
Description
Technical field
The utility model relates to a kind of high-power wireless front end.
Background technology
Recently, flourish along with wlan technologies, the application of wireless network constantly enlarges, thereby makes the application of radio reception device become one of important high speed wireless data access means of indoor especially hot zones.And along with the release of 802.11n standard, the 802.11n product demand that is fit to hot zones also sharply increases, and therefore, the exploitation of the exploitation of high-power wireless access device, particularly wireless front end receives very big concern.
In order to reach coverage far away, radio reception device all requires wireless front end to have very big power, and is general, requires power more than or equal to 500mW.Fig. 1 is traditional wireless front end product structure schematic diagram, as can be seen from Figure 1, the mode that traditional wireless front end product adopts plug-in card to add external power amplifier constitutes, adopt the tandem type two-stage to amplify mode: the plug-in card of a power amplifier to be inserted on the mainboard to use, plug-in card provides power detection to feed back to wireless chip, with cable plug-in card is connected to external power amplifier, is connected with interface on the equipment with transit cable again.But mainly there is following defective in present high-power wireless front end product:
(1) because power-sensing circuit can only detect first order Amplifier Gain situation, then can not control for second level Amplifier Gain, so, can exist signal quality to show the situation of virtual height, and then cause the actual effects that connect such as transmission rate is low bad, perhaps, cause situations such as the difficulty that connects, negotiated speed be low;
When (two) the wireless front end product used in the environment that exist to disturb, the input of power amplifier can be coupled to interference source, and so, interference source can be amplified synchronously, influences existing network, is embodied in: can not be connected to network, go offline etc.;
When (three) the wireless front end product used under the 802.11b/g pattern, power can reach 500mW, and when using under the 802.11n pattern, power can only reach about 100mW; And this is high-power obtains with the victim signal quality, and negotiated speed is difficult to reach the negotiated speed of 802.11n standard code when remote;
(4) owing to need to add network interface card socket, transit cable, adapter coupling and extra printed circuit board (pcb), so, cause the cost of wireless front end product higher;
(5) area of dissipation of wireless front end product only is confined to the area of network interface card, area of dissipation is less, circulation of air is relatively poor, so, cause radiating effect poor, the local temperature of product is higher, even " scalding one's hand " can appear, such product tends to occur phenomenons such as deadlock, damage in hot environment the time.
The utility model content
The technical problems to be solved in the utility model provides a kind of high-power wireless front end, and signal shows virtual height in the prior art to solve, be subject to disturb, the defective of cost height and radiating effect difference.
In order to address the above problem, the utility model provides a kind of high-power wireless front end, and this wireless front end comprises: wireless chip, transtation mission circuit, switching circuit, equipment interface and receiving circuit;
Described wireless chip is electrically connected with described transtation mission circuit, switching circuit and receiving circuit respectively; Described transtation mission circuit is electrically connected with described switching circuit; Described switching circuit is electrically connected with equipment interface; Described receiving circuit is electrically connected with described switching circuit;
The wireless fractionation signal of described wireless chip modulation passes through described transtation mission circuit and described switching circuit successively, by described equipment interface output;
The signal that described equipment interface receives passes through described switching circuit and described receiving circuit successively, is received by described wireless chip;
The Feedback of Power of the signal of described transtation mission circuit after with detected processing and amplifying is given described wireless chip.
Further, described transtation mission circuit comprises: Ba Lun, balanced type power amplifier, power-sensing circuit; Described receiving circuit comprises: low noise amplifier; Described wireless chip is electrically connected with described Ba Lun, described power-sensing circuit, described switching circuit and described low noise amplifier respectively; Described Ba Lun is electrically connected with described balanced type power amplifier; Described balanced type power amplifier is electrically connected with described power-sensing circuit; Described power-sensing circuit is electrically connected with described switching circuit; Described low noise amplifier is electrically connected with described switching circuit.
Further, described transtation mission circuit comprises: first band pass filter and low pass filter; Described first band pass filter is electrically connected with described Ba Lun and described balanced type power amplifier respectively; Described power-sensing circuit is electrically connected with described low pass filter; Described low pass filter is electrically connected with described switching circuit.
Further, described receiving circuit comprises: second band pass filter; Described second band pass filter is electrically connected, reaches described wireless chip respectively and is electrically connected with described low noise amplifier.
Further, described balanced type power amplifier comprises: 90 ° of phase shift Ba Lun of a 3dB, first power amplifier, second power amplifier and 90 ° of phase shift Ba Lun of the 2nd 3dB; Described first power amplifier respectively at 90 ° of phase shift Ba Lun of a described 3dB, and 90 ° of phase shift Ba Lun of described the 2nd 3dB be electrically connected; Described second power amplifier respectively at 90 ° of phase shift Ba Lun of a described 3dB, and 90 ° of phase shift Ba Lun of described the 2nd 3dB be electrically connected.
Further, described wireless chip, described transtation mission circuit, described switching circuit and described receiving circuit are placed on the mainboard; Described equipment interface directly is welded on the mainboard.
Further, in the position of fin correspondence projection is set, boss links to each other with the Copper Foil of mainboard by the heat conduction cotton.
Further, the material of described fin is the material of heat conduction.
The utlity model has following advantage:
1, described one road signal is carried out the filtering clutter earlier and handle, the signal after again the filtering clutter being handled carries out power amplification to be handled, and so, can the guaranteed output amplifier input terminal can not be coupled to interference source; And the signal after described power amplification handled carries out filtering high frequency unwanted signal and handles, and the signal after also described lifting signal to noise ratio being handled carries out the filtering clutter to be handled, so, and the effective outer spurious signal of inhibition zone, that is: interference signal, raising signal quality.
In addition, wireless chip, transtation mission circuit, switching circuit and receiving circuit all are placed on the mainboard, and N type interface directly is welded on the mainboard, so, can effectively reduce the cost of product.
In addition, solder mask is removed at the back side in the heat source region of mainboard, the Copper Foil that exposes mainboard, position in the fin correspondence is provided with projection, and boss links to each other with Copper Foil by the heat conduction cotton, so, can effectively increase area of dissipation, improve the circulation of air ability, and then make various devices carry out work, improve the stability of product in suitable temperature.
2, the utility model circuit structure compactness, reasonable does not need transit cable and interface unit etc., so, has reduced the generation of radiation.
Description of drawings
Below in conjunction with accompanying drawing execution mode of the present utility model is described further:
Fig. 1 is traditional wireless front end product structure connection diagram;
Fig. 2 is the utility model embodiment high-power wireless front end structure connection diagram;
Fig. 3 is the front view of the utility model embodiment high-power wireless front end.
Embodiment
Below in conjunction with drawings and the specific embodiments the utility model is further described in more detail.
The high-power wireless front end that the utility model provides, as shown in Figure 2, this wireless front end comprises: wireless chip 21, transtation mission circuit 22, switching circuit 23, equipment interface 24 and receiving circuit 25; Wherein,
Receiving circuit 25 after being used to receive the signal of switching circuit 23 transmissions, promotes signal to noise ratio to the received signal and handle, and the signal after will handling sends to wireless chip 21;
Wherein, described wireless chip 21 is electrically connected with described transtation mission circuit 22, switching circuit 23 and receiving circuit 25 respectively; Described transtation mission circuit 22 is electrically connected with described switching circuit 23; Described switching circuit 23 is electrically connected with equipment interface 24; Described receiving circuit 25 is electrically connected with described switching circuit 23;
The wireless fractionation signal of described wireless chip 21 modulation passes through described transtation mission circuit 22 and described switching circuit 23 successively, by described equipment interface 24 outputs;
The signal that described equipment interface 24 receives passes through described switching circuit 23 and described receiving circuit 25 successively, is received by described wireless chip 21.
Wherein, described transtation mission circuit 22 can further include: Ba Lun 221, balanced type power amplifier 222, power-sensing circuit 223;
Described receiving circuit 25 can further include: low noise amplifier 251;
Ba Lun 221, and the wireless differential signal that the wireless chip 21 that is used for receiving sends is merged into one road signal, and described one road signal is sent to balanced type power amplifier 222;
Balanced type power amplifier 222, described one road signal that the Ba Lun 221 that is used for receiving sends carries out power amplification to be handled, and the signal after will handling sends to power-sensing circuit 223;
Power-sensing circuit 223 is used to detect the power of the signal that the balanced type power amplifier received 222 sends, and gives wireless chip 21 with detected Feedback of Power, and the signal of receiving is sent to switching circuit 23;
Wherein, described wireless chip 21 respectively with described Ba Lun 221, described power-sensing circuit 223, and described low noise amplifier 251 be electrically connected; Described Ba Lun 221 is electrically connected with described balanced type power amplifier 222; Described balanced type power amplifier 222 is electrically connected with described power-sensing circuit 223; Described power-sensing circuit 223 is electrically connected with described switching circuit 23; Described low noise amplifier 251 is electrically connected with described switching circuit 23.
Wherein, described transtation mission circuit 22 can further include: first band pass filter 224 and low pass filter 225;
Ba Lun 221, and the wireless differential signal that the wireless chip 21 that is used for receiving sends is merged into one road signal, and described one road signal is sent to first band pass filter 224;
First band pass filter 224 is used for that described one road signal that the Ba Lun 221 that receives sends is carried out the filtering clutter and handles, and the signal after will handling sends to balanced type power amplifier 222;
Balanced type power amplifier 222, the signal that the band pass filter 224 that is used for receiving sends carries out power amplification to be handled, and the signal after will handling sends to power-sensing circuit 223;
Power-sensing circuit 223 is used to detect the power of the signal that the balanced type power amplifier received 222 sends, and gives wireless chip 21 with detected Feedback of Power, and the signal of receiving is sent to low pass filter 225;
Wherein, described first band pass filter 224 is electrically connected with described Ba Lun 221 and described balanced type power amplifier 222 respectively; Described power-sensing circuit 223 is electrically connected with described low pass filter 225; Described low pass filter 225 is electrically connected with described switching circuit 23.
Wherein, described receiving circuit 25 can further include: second band pass filter 252;
Second band pass filter 252 is used for that the signal that the low noise amplifier of receiving 251 sends is carried out the filtering clutter and handles, and the signal after will handling sends to wireless chip 21;
Wherein, described second band pass filter 252 respectively with described low noise amplifier 251, and described wireless chip 21 be electrically connected.
Wherein, described balanced type power amplifier 222 can further include: 90 ° of phase shift Ba Lun of a 3dB 2221, first power amplifier 2222, second power amplifier 2223 and 90 ° of phase shift Ba Lun 2224 of the 2nd 3dB;
When wireless front end does not comprise first band pass filter 224,90 ° of phase shift Ba Lun 2221 of the one 3dB, described one road signal that the Ba Lun 221 that is used for receiving sends is divided into two paths of signals, and the two paths of signals that will be divided into sends to first power amplifier 2222, second power amplifier 2223 respectively;
When wireless front end does not comprise first band pass filter 224,90 ° of phase shift Ba Lun 2221 of the one 3dB, described one road signal that first band pass filter 224 that is used for receiving sends is divided into two paths of signals, and the two paths of signals that will be divided into sends to first power amplifier 2222, second power amplifier 2223 respectively;
90 ° of phase shift Ba Lun 2224 of the 2nd 3dB are used for two paths of signals is merged into one the tunnel, and the signal after will merging sending to power-sensing circuit 223 after receiving the signal that first power amplifier 2222 and second power amplifier 2223 send;
Wherein, for the power that guarantees wireless front end can reach 500mW, requiring the yield value of described first power amplifier 2222 and second power amplifier 2223 is more than the 30dB;
When wireless front end did not comprise first band pass filter 224,90 ° of phase shift Ba Lun 2221 of a described 3dB were electrically connected with described Ba Lun 221; When wireless front end comprised first band pass filter 224,90 ° of phase shift Ba Lun 2221 of a described 3dB were electrically connected with described first band pass filter 224; Described first power amplifier 2222 respectively at 90 ° of phase shift Ba Lun 2221 of a described 3dB, and described the 2nd 3dB90 ° phase shift Ba Lun 2224 be electrically connected; Described second power amplifier 2223 respectively at a described 3dB90 ° phase shift Ba Lun 2221, and 90 ° of phase shift Ba Lun of described the 2nd 3dB 2224 be electrically connected; Described the 2nd 3dB90 ° phase shift Ba Lun 2224 is electrically connected with described power-sensing circuit 223.
Described wireless chip 21 after also being used to receive detected power, is adjusted power output according to detected power, when sending signal once more, adopts adjusted power output to send signal.
The wireless fractionation signal of described wireless chip 21 modulation passes through described transtation mission circuit 22 and described switching circuit 23 successively, by described equipment interface 24 outputs, the Feedback of Power of the signal of described transtation mission circuit after with detected processing and amplifying is given described wireless chip, is specially:
The wireless differential signal that described wireless chip 21 will be modulated sends to described Ba Lun 221, described Ba Lun 221 merges into one road signal with the signal of receiving, and send to described first band pass filter 224, described first band pass filter 224 carries out the filtering clutter with the signal of receiving to be handled, and the signal after will handling sends to 90 ° of phase shift Ba Lun 2221 of a described 3dB, 90 ° of phase shift Ba Lun 2221 of a described 3dB are divided into two paths of signals with the signal of receiving, and the two paths of signals that will be divided into sends to described first power amplifier 2222 respectively, described second power amplifier 2223, described first power amplifier 2222 carries out the signal processing and amplifying with the signal of receiving, and the signal after will handling sends to 90 ° of phase shift Ba Lun 2224 of described the 2nd 3dB, described second power amplifier 2223 carries out the signal processing and amplifying with the signal of receiving, and the signal after will handling sends to 90 ° of phase shift Ba Lun 2224 of described the 2nd 3dB, 90 ° of phase shift Ba Lun 2224 of described the 2nd 3dB are merged into one the tunnel with the two paths of signals of receiving, and the signal after will merging sends to described power-sensing circuit 223, described power-sensing circuit 223 detects the power of the signal of receiving, give described wireless chip 21 with detected Feedback of Power, and the signal of receiving sent to described low pass filter 225, described low pass filter 225 carries out filtering high frequency unwanted signal with the signal of receiving to be handled, and the signal after will handling sends to described switching circuit 23, described switching circuit 23 is input to described equipment interface 24 with the signal of receiving, described equipment interface 24 is with the signal output of receiving;
The signal that described equipment interface 24 receives passes through described switching circuit 23 and described receiving circuit 25 successively, is received by described wireless chip 21, is specially:
Described equipment interface 24 sends to described switching circuit 23 with the signal that receives, described switching circuit 23 sends to described low noise amplifier 251 with the signal of receiving, described low noise amplifier 251 promotes signal to noise ratio to the received signal and handles, and the signal after will handling sends to described second band pass filter 252,252 pairs of signals of receiving of described second band pass filter carry out the filtering clutter to be handled, and the signal after will handling sends to described wireless chip 21, and described wireless chip 21 carries out demodulation to the received signal.
Fig. 3 is the front view of wireless front end of the present utility model, as can be seen from Figure 3, wireless chip 21, transtation mission circuit 22, switching circuit 23 and receiving circuit 25 all are placed on the mainboard 31, wherein, wireless chip 21, transtation mission circuit 22, switching circuit 23 and receiving circuit 25 are referred to as device 32, equipment interface 24 is a N type interface, and N type interface directly is welded on the mainboard 31;
Solder mask is removed at the back side in the heat source region of mainboard 31, the Copper Foil that exposes mainboard, position in fin 33 correspondences is provided with projection, boss links to each other with Copper Foil by heat conduction cotton 34, particularly, has caking property on the heat conduction cotton 34, corresponding with Copper Foil and the fin 33 respectively boss of caking property by the heat conduction cotton is connected, heat conduction cotton 34 is closely contacted with Copper Foil with fin 33, like this, can increase area of dissipation; Described heat source region is meant switching circuit 23, first power amplifier 2222 and the shared zone of second power amplifier 2223.
Fin 33 is fixed on the mainboard 31 by screw 35, and the material of fin 33 can be the material of all heat conduction, such as: aluminium, copper etc.; Generally, in actual applications, can select metallic aluminium, because aluminium has thermal conductivity preferably, and price is comparatively cheap.
In sum; it below only is preferred embodiment of the present utility model; be not to be used to limit protection range of the present utility model; therefore; all any modifications of within spirit of the present utility model and principle, being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (8)
1. a high-power wireless front end is characterized in that, this wireless front end comprises: wireless chip, transtation mission circuit, switching circuit, equipment interface and receiving circuit;
Described wireless chip is electrically connected with described transtation mission circuit, switching circuit and receiving circuit respectively; Described transtation mission circuit is electrically connected with described switching circuit; Described switching circuit is electrically connected with equipment interface; Described receiving circuit is electrically connected with described switching circuit;
The wireless fractionation signal of described wireless chip modulation passes through described transtation mission circuit and described switching circuit successively, by described equipment interface output;
The signal that described equipment interface receives passes through described switching circuit and described receiving circuit successively, is received by described wireless chip;
The Feedback of Power of the signal of described transtation mission circuit after with detected processing and amplifying is given described wireless chip.
2. wireless front end according to claim 1 is characterized in that, described transtation mission circuit further comprises: Ba Lun, balanced type power amplifier, power-sensing circuit;
Described receiving circuit further comprises: low noise amplifier;
Described wireless chip is electrically connected with described Ba Lun, described power-sensing circuit, described switching circuit and described low noise amplifier respectively; Described Ba Lun is electrically connected with described balanced type power amplifier; Described balanced type power amplifier is electrically connected with described power-sensing circuit; Described power-sensing circuit is electrically connected with described switching circuit; Described low noise amplifier is electrically connected with described switching circuit.
3. wireless front end according to claim 2 is characterized in that, described transtation mission circuit further comprises: first band pass filter and low pass filter;
Described first band pass filter is electrically connected with described Ba Lun and described balanced type power amplifier respectively; Described power-sensing circuit is electrically connected with described low pass filter; Described low pass filter is electrically connected with described switching circuit.
4. wireless front end according to claim 2 is characterized in that, described receiving circuit further comprises: second band pass filter;
Described second band pass filter is electrically connected, reaches described wireless chip respectively and is electrically connected with described low noise amplifier.
5. according to right 2 to 4 each described wireless front ends, it is characterized in that described balanced type power amplifier further comprises: 90 ° of phase shift Ba Lun of a 3dB, first power amplifier, second power amplifier and 90 ° of phase shift Ba Lun of the 2nd 3dB;
Described first power amplifier respectively at 90 ° of phase shift Ba Lun of a described 3dB, and 90 ° of phase shift Ba Lun of described the 2nd 3dB be electrically connected; Described second power amplifier respectively at 90 ° of phase shift Ba Lun of a described 3dB, and 90 ° of phase shift Ba Lun of described the 2nd 3dB be electrically connected.
6. according to each described wireless front end of claim 1 to 4, it is characterized in that described wireless chip, described transtation mission circuit, described switching circuit and described receiving circuit are placed on the mainboard; Described equipment interface directly is welded on the mainboard.
7. wireless front end according to claim 6 is characterized in that, in the position of fin correspondence projection is set, and boss links to each other with the Copper Foil of mainboard by the heat conduction cotton.
8. wireless front end according to claim 7 is characterized in that, the material of described fin is the material of heat conduction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020270027XU CN201766586U (en) | 2010-07-23 | 2010-07-23 | High-power wireless front end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020270027XU CN201766586U (en) | 2010-07-23 | 2010-07-23 | High-power wireless front end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201766586U true CN201766586U (en) | 2011-03-16 |
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ID=43719192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020270027XU Expired - Lifetime CN201766586U (en) | 2010-07-23 | 2010-07-23 | High-power wireless front end |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201766586U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917758A (en) * | 2010-07-23 | 2010-12-15 | 中兴通讯股份有限公司 | High-power wireless front end and application method thereof |
| CN107733214A (en) * | 2017-11-15 | 2018-02-23 | 珠海格力电器股份有限公司 | Improve the method and apparatus and Switching Power Supply of Switching Power Supply stability |
| CN107911087A (en) * | 2017-12-07 | 2018-04-13 | 南京长峰航天电子科技有限公司 | A kind of UHF waveband high power solid state amplifier block |
-
2010
- 2010-07-23 CN CN201020270027XU patent/CN201766586U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917758A (en) * | 2010-07-23 | 2010-12-15 | 中兴通讯股份有限公司 | High-power wireless front end and application method thereof |
| CN101917758B (en) * | 2010-07-23 | 2014-12-10 | 中兴通讯股份有限公司 | High-power wireless front end and application method thereof |
| CN107733214A (en) * | 2017-11-15 | 2018-02-23 | 珠海格力电器股份有限公司 | Improve the method and apparatus and Switching Power Supply of Switching Power Supply stability |
| CN107733214B (en) * | 2017-11-15 | 2019-10-08 | 珠海格力电器股份有限公司 | Improve the method and apparatus and Switching Power Supply of Switching Power Supply stability |
| CN107911087A (en) * | 2017-12-07 | 2018-04-13 | 南京长峰航天电子科技有限公司 | A kind of UHF waveband high power solid state amplifier block |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110316 Effective date of abandoning: 20141210 |
|
| RGAV | Abandon patent right to avoid regrant |