CN101917758B - High-power wireless front end and application method thereof - Google Patents
High-power wireless front end and application method thereof Download PDFInfo
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- CN101917758B CN101917758B CN201010236127.5A CN201010236127A CN101917758B CN 101917758 B CN101917758 B CN 101917758B CN 201010236127 A CN201010236127 A CN 201010236127A CN 101917758 B CN101917758 B CN 101917758B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/465—Power sensing
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
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Abstract
The invention discloses a high-power wireless front end and an application method thereof, wherein the application method comprises the steps of: when sending signals, controlling a switch circuit to send signals by a wireless chip; merging wireless differential signals modulated by the wireless chip into one path of signals, then carrying out power amplification on the path of signals, detecting the power of the signals subjected to the power amplification, feeding the detected power to the wireless chip, outputting the signal subjected to the power amplification from an equipment interface through the switching circuit; when receiving the signals, controlling the switch circuit to receive the signals by the wireless chip; and carrying out SNR (Signal to Noise Ratio) increase on the signals after passing through the switch circuit in the signals received by the equipment interface, and sending the signals subjected to the SNR increase to the wireless chip, and demodulating the signals by the wireless chip. By adopting the wireless front end and the application method thereof, the wireless chip can regulate the output power according to the detected power of the signals subjected to the power amplification, and further ensure that the output power of the wireless chip is more stable.
Description
Technical field
The present invention relates to the communication technology, refer to especially a kind of high-power wireless front end and application process thereof.
Background technology
Recently, flourish along with wlan technologies, the application of wireless network constantly expands, 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 applicable to hot zones also sharply increases, therefore, the exploitation of the exploitation of high-power wireless access device, particularly wireless front end receives very large concern.
In order to reach coverage far away, radio reception device all requires wireless front end to have very large power, general, requires power to be 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 forms, adopt tandem type two-stage to amplify mode: the plug-in card of a power amplifier is inserted on mainboard and is used, plug-in card provides power detection to feed back to wireless chip, with cable, plug-in card is connected to external power amplifier, then is connected with the interface on equipment with transit cable.But mainly there is following defect in current high-power wireless front end product:
(1) the gain situation of first order amplifier due to power-sensing circuit, can only be detected, gain for second level amplifier can not be controlled, 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, or, cause the situations such as the difficulty that connects, negotiated speed be low;
(2) when wireless front end product is used in the environment exist disturbing, the input of power amplifier can be coupled to interference source, and so, interference source can synchronously be amplified, and affects existing network, is embodied in: can not be connected to network, go offline etc.;
(3) when wireless front end product is used under 802.11b/g pattern, power can reach 500mW, and while using under 802.11n pattern, power can only reach 100mW left and right; And this is high-power obtains with victim signal quality, when remote, negotiated speed is difficult to reach the negotiated speed of 802.11n standard regulation;
(4), owing to need to adding 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 is only confined to the area of network interface card, area of dissipation is less, circulation of air is poor, so, cause radiating effect poor, the local temperature of product is higher, even there will be " scalding one's hand ", such product tends to occur the phenomenons such as deadlock, damage in hot environment time.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of high-power wireless front end and application process thereof, the defect that can solve signal demonstration virtual height in prior art, be easily disturbed, cost is high and radiating effect is poor.
For achieving the above object, technical scheme of the present invention is achieved in that
The application process that the invention provides a kind of high-power wireless front end, the method comprises:
During transmitted signal, wireless chip control switch circuit is transmitted signal; The wireless differential signal of wireless chip modulation is merged into a road signal, afterwards a described road signal is carried out to power amplification processing, detection power is amplified the power of the signal after processing, and by the Feedback of Power detecting to wireless chip, signal after power amplification is simultaneously processed, through switching circuit, is exported by equipment interface;
While receiving signal, wireless chip control switch circuit is for receiving signal; The signal of the signal that equipment interface is received after via switching circuit promotes signal to noise ratio and processes, and the signal after processing is sent to wireless chip, by wireless chip, signal carried out to demodulation.
In such scheme, before a described road signal is carried out to power amplification processing, the method further comprises:
A described road signal is first carried out to filtering clutter processing, obtain power amplification and process required signal.
In such scheme, the signal after power amplification is processed is through switching circuit, and before being exported by equipment interface, the method further comprises:
Signal after described power amplification is processed carries out filtering high frequency unwanted signal to be processed, and obtains through the required signal of switching circuit.
In such scheme, before the signal after processing is sent to wireless chip, the method further comprises:
Signal after described lifting signal to noise ratio is processed first carries out filtering clutter processing, obtains the signal that sends to wireless chip required.
In such scheme, by the Feedback of Power detecting to wireless chip after, the method further comprises:
Wireless chip is received after the power detecting, and according to the power detecting, adjusts power output;
Again during transmitted signal, adopt the power output transmitted signal after adjusting.
The present invention also 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; Wherein,
Wireless chip, during for transmitted signal, control switch circuit is transmitted signal, and the wireless differential signal of modulation is sent to transtation mission circuit, and receives the power detecting of transtation mission circuit feedback; While receiving signal, control switch circuit is reception signal, and receives the signal that receiving circuit sends, and carries out to the received signal demodulation;
Transtation mission circuit, for the wireless differential signal that the wireless chip of receiving is sent, merge into a road signal, afterwards a described road signal is carried out to power amplification processing, detection power is amplified the power of the signal after processing, and by the Feedback of Power detecting to wireless chip, the signal after simultaneously power amplification is processed sends to switching circuit;
Switching circuit, for being controlled by wireless chip, and the signal that transtation mission circuit is sent is input to equipment interface; The signal that the equipment interface of receiving is sent sends to receiving circuit;
Equipment interface, for the signal of output switch circuit input, and sends to switching circuit by the signal receiving;
Receiving circuit, for receiving after the signal of switching circuit transmission, promotes to the received signal signal to noise ratio and processes, and the signal after processing is sent to wireless chip.
In such scheme, described transtation mission circuit further comprises: Ba Lun, balanced type power amplifier, power-sensing circuit;
Described receiving circuit further comprises: low noise amplifier;
Wireless chip, during for transmitted signal, control switch circuit is transmitted signal, and the wireless differential signal of modulation is sent to Ba Lun, and the power detecting of received power testing circuit feedback; While receiving signal, control switch circuit is reception signal, and receives the signal that low noise amplifier sends, and carries out to the received signal demodulation;
Ba Lun, merges into a road signal for the wireless differential signal that the wireless chip of receiving is sent, and a described road signal is sent to balanced type power amplifier;
Balanced type power amplifier, carries out power amplification processing for the described road signal that the Ba Lun receiving is sent, and the signal after processing is sent to power-sensing circuit;
Power-sensing circuit, the power of the signal sending for detection of the balanced type power amplifier received, to wireless chip, and sends to switching circuit by the signal of receiving by the Feedback of Power detecting;
Switching circuit, for being controlled by wireless chip, and the signal that power-sensing circuit is sent is input to equipment interface; The signal that the equipment interface of receiving is sent sends to low noise amplifier;
Equipment interface, for the signal of output switch circuit input, and sends to switching circuit by the signal receiving;
Low noise amplifier, for receiving after the signal of switching circuit transmission, promotes to the received signal signal to noise ratio and processes, and the signal after processing is sent to wireless chip.
In such scheme, described transtation mission circuit further comprises: the first band pass filter and low pass filter;
Ba Lun, merges into a road signal for the wireless differential signal that the wireless chip of receiving is sent, and a described road signal is sent to the first band pass filter;
The first band pass filter, the described road signal sending for the Ba Lun to receiving carries out filtering clutter processing, and the signal after processing is sent to balanced type power amplifier;
Balanced type power amplifier, carries out power amplification processing for the signal that the band pass filter of receiving is sent, and the signal after processing is sent to power-sensing circuit;
Power-sensing circuit, the power of the signal sending for detection of the balanced type power amplifier received, to wireless chip, and sends to low pass filter by the signal of receiving by the Feedback of Power detecting;
Low pass filter, the signal sending for the power-sensing circuit to receiving carries out filtering high frequency unwanted signal to be processed, and the signal after processing is sent to switching circuit;
Switching circuit, is input to equipment interface for the signal that low pass filter is sent.
In such scheme, described receiving circuit further comprises: the second band pass filter;
Low noise amplifier, for receiving after the signal of switching circuit transmission, promotes to the received signal signal to noise ratio and processes, and the signal after processing is sent to the second band pass filter;
The second band pass filter, the signal sending for the low noise amplifier to receiving carries out filtering clutter processing, and the signal after processing is sent to wireless chip;
Wireless chip, the signal sending for receiving the second band pass filter, carries out demodulation to the received signal.
In such scheme, described balanced type power amplifier further comprises: a 3dB90 ° phase shift Ba Lun, the first power amplifier, the second power amplifier and the 2nd 3dB90 ° phase shift Ba Lun;
The one 3dB90 ° phase shift Ba Lun, for a described road signal of the Ba Lun receiving or the transmission of the first band pass filter is divided into two paths of signals, and sends to respectively the first power amplifier, the second power amplifier by the two paths of signals being divided into;
The first power amplifier, carries out signal for the signal that a 3dB90 who receives ° of phase shift Ba Lun sent and amplifies processing, and the signal after processing is sent to the 2nd 3dB90 ° phase shift Ba Lun;
The second power amplifier, carries out signal for the signal that a 3dB90 who receives ° of phase shift Ba Lun sent and amplifies processing, and the signal after processing is sent to the 2nd 3dB90 ° phase shift Ba Lun;
The 2nd 3dB90 ° phase shift Ba Lun, for after receiving the signal that the first power amplifier and the second power amplifier send, is merged into a road by two paths of signals, and the signal after merging is sent to power-sensing circuit.
In such scheme, described wireless chip, also for receiving after the power detecting, adjusts power output according to the power that detects, again during transmitted signal, adopts the power output transmitted signal after adjusting.
The present invention also 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 to described transtation mission circuit, switching circuit and receiving circuit respectively; Described transtation mission circuit is electrically connected to described switching circuit; Described switching circuit is electrically connected to equipment interface; Described receiving circuit is electrically connected to described switching circuit;
The wireless differential signal of described wireless chip modulation passes through described transtation mission circuit and described switching circuit successively, by described equipment interface, is exported;
The signal that described equipment interface receives passes through described switching circuit and described receiving circuit successively, by described wireless chip, is received;
The Feedback of Power of the signal after described transtation mission circuit is processed the amplification detecting is to described wireless chip.
In such scheme, 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 to described Ba Lun, described power-sensing circuit, described switching circuit and described low noise amplifier respectively; Described Ba Lun is electrically connected to described balanced type power amplifier; Described balanced type power amplifier is electrically connected to described power-sensing circuit; Described power-sensing circuit is electrically connected to described switching circuit; Described low noise amplifier is electrically connected to described switching circuit.
In such scheme, described transtation mission circuit further comprises: the first band pass filter and low pass filter;
Described the first band pass filter is electrically connected to described Ba Lun and described balanced type power amplifier respectively; Described power-sensing circuit is electrically connected to described low pass filter; Described low pass filter is electrically connected to described switching circuit.
In such scheme, described receiving circuit further comprises: the second band pass filter;
Described the second band pass filter is electrically connected to described low noise amplifier respectively and described wireless chip is electrically connected to.
In such scheme, described balanced type power amplifier further comprises: a 3dB90 ° phase shift Ba Lun, the first power amplifier, the second power amplifier and the 2nd 3dB90 ° phase shift Ba Lun;
Described the first power amplifier is electrically connected to respectively at a described 3dB90 ° phase shift Ba Lun and described the 2nd 3dB90 ° of phase shift Ba Lun; Described the second power amplifier is electrically connected to respectively at a described 3dB90 ° phase shift Ba Lun and described the 2nd 3dB90 ° of phase shift Ba Lun.
In such scheme, described wireless chip, described transtation mission circuit, described switching circuit and described receiving circuit are placed on a mainboard; Described equipment interface is directly welded on mainboard.
In such scheme, the position corresponding at fin arranges projection, and boss is connected with the Copper Foil of described mainboard by heat conduction cotton.
In such scheme, the material that the material of described fin is heat conduction.
High-power wireless front end provided by the invention and application process thereof, the wireless differential signal of wireless chip modulation is merged into a road signal, afterwards a described road signal is carried out to power amplification processing, detection power is amplified the power of the signal after processing, and by the Feedback of Power detecting to wireless chip, so, the power of the signal after wireless chip can be processed according to the power amplification detecting is adjusted power output, and then makes the power output of wireless chip more stable; And circuit structure is compact, reasonable, does not need transit cable and interface unit etc., so, has reduced the generation of radiation.
A described road signal is first carried out to filtering clutter processing, then the signal after filtering clutter processing is carried out to power amplification processing, so, the input of energy guaranteed output amplifier can not be coupled to interference source; And the signal after described power amplification is processed carries out filtering high frequency unwanted signal and process, the signal after also described lifting signal to noise ratio being processed carries out filtering clutter processing, 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 are all placed on a mainboard, and N-type interface is directly welded on 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, the position corresponding at fin arranges projection, and boss is connected with Copper Foil by heat conduction cotton, so, can effectively increase area of dissipation, improve circulation of air ability, and then make various devices carry out work in suitable temperature, improve the stability of product.
Accompanying drawing explanation
Fig. 1 is traditional wireless front end product structure connection diagram;
Fig. 2 is embodiment of the present invention high-power wireless front end structure connection diagram;
Fig. 3 is the front view of embodiment of the present invention high-power wireless front end;
Fig. 4 is the application process schematic flow sheet of embodiment of the present invention high-power wireless front end.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is further described in more detail.
High-power wireless front end provided by the invention, 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,
Wireless chip 21, during for transmitted signal, control switch circuit 23 is transmitted signal, and the wireless differential signal of modulation is sent to transtation mission circuit 22, and receives the power detecting of transtation mission circuit 22 feedbacks; While receiving signal, control switch circuit 23 is reception signal, and receives the signal that receiving circuit 25 sends, and carries out to the received signal demodulation;
Transtation mission circuit 22, for the wireless differential signal that the wireless chip of receiving 21 is sent, merge into a road signal, afterwards a described road signal is carried out to power amplification processing, detection power is amplified the power of the signal after processing, and by the Feedback of Power detecting to wireless chip, the signal after simultaneously power amplification is processed sends to switching circuit 23;
Switching circuit 23, for being controlled by wireless chip 21, and the signal that transtation mission circuit 22 is sent is input to equipment interface 24; The signal that the equipment interface of receiving 24 is sent sends to receiving circuit 25;
Equipment interface 24, for the signal of output switch circuit 23 inputs, and sends to switching circuit 23 by the signal receiving;
Receiving circuit 25, for receiving after the signal of switching circuit 23 transmissions, promotes to the received signal signal to noise ratio and processes, and the signal after processing is sent to wireless chip 21;
Wherein, described wireless chip 21 is electrically connected to described transtation mission circuit 22, switching circuit 23 and receiving circuit 25 respectively; Described transtation mission circuit 22 is electrically connected to described switching circuit 23; Described switching circuit 23 is electrically connected to equipment interface 24; Described receiving circuit 25 is electrically connected to described switching circuit 23;
The wireless differential 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, by described wireless chip 21, is received.
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;
Wireless chip 21, during for transmitted signal, control switch circuit 23 is transmitted signal, and the wireless differential signal of modulation is sent to Ba Lun 221, and the power detecting of received power testing circuit 223 feedbacks; While receiving signal, control switch circuit 23 is reception signal, and receives the signal that low noise amplifier 251 sends, and carries out to the received signal demodulation;
Ba Lun 221, merge into a road signal, and a described road signal is sent to balanced type power amplifier 222 for the wireless differential signal that the wireless chip of receiving 21 is sent;
Balanced type power amplifier 222, carries out power amplification processing for the described road signal that the Ba Lun receiving 221 is sent, and the signal after processing is sent to power-sensing circuit 223;
Power-sensing circuit 223, the power of the signal sending for detection of the balanced type power amplifier 222 of receiving, to wireless chip 21, and sends to switching circuit 23 by the signal of receiving by the Feedback of Power detecting;
Switching circuit 23, for being controlled by wireless chip 21, and the signal that power-sensing circuit 223 is sent is input to equipment interface 24; The signal that the equipment interface of receiving 24 is sent sends to low noise amplifier 251;
Equipment interface 24, for the signal of output switch circuit 23 inputs, and sends to switching circuit 23 by the signal receiving;
Low noise amplifier 251, for receiving after the signal of switching circuit 23 transmissions, promotes to the received signal signal to noise ratio and processes, and the signal after processing is sent to wireless chip 21.
Wherein, described wireless chip 21 is electrically connected to described Ba Lun 221, described power-sensing circuit 223 and described low noise amplifier 251 respectively; Described Ba Lun 221 is electrically connected to described balanced type power amplifier 222; Described balanced type power amplifier 222 is electrically connected to described power-sensing circuit 223; Described power-sensing circuit 223 is electrically connected to described switching circuit 23; Described low noise amplifier 251 is electrically connected to described switching circuit 23.
Wherein, described transtation mission circuit 22 can further include: the first band pass filter 224 and low pass filter 225;
Ba Lun 221, merge into a road signal, and a described road signal is sent to the first band pass filter 224 for the wireless differential signal that the wireless chip of receiving 21 is sent;
The first band pass filter 224, the described road signal sending for the Ba Lun 221 to receiving carries out filtering clutter processing, and the signal after processing is sent to balanced type power amplifier 222;
Balanced type power amplifier 222, carries out power amplification processing for the signal that the band pass filter of receiving 224 is sent, and the signal after processing is sent to power-sensing circuit 223;
Power-sensing circuit 223, the power of the signal sending for detection of the balanced type power amplifier 222 of receiving, to wireless chip 21, and sends to low pass filter 225 by the signal of receiving by the Feedback of Power detecting;
Low pass filter 225, the signal sending for the power-sensing circuit 223 to receiving carries out filtering high frequency unwanted signal to be processed, and the signal after processing is sent to switching circuit 23;
Switching circuit 23, is input to equipment interface 24 for the signal that low pass filter 225 is sent.
Wherein, described the first band pass filter 224 is electrically connected to described Ba Lun 221 and described balanced type power amplifier 222 respectively; Described power-sensing circuit 223 is electrically connected to described low pass filter 225; Described low pass filter 225 is electrically connected to described switching circuit 23.
Wherein, described receiving circuit 25 can further include: the second band pass filter 252;
Low noise amplifier 251, for receiving after the signal of switching circuit 23 transmissions, promotes to the received signal signal to noise ratio and processes, and the signal after processing is sent to the second band pass filter 252;
The second band pass filter 252, the signal sending for the low noise amplifier 251 to receiving carries out filtering clutter processing, and the signal after processing is sent to wireless chip 21;
Wireless chip 21, the signal sending for receiving the second band pass filter 252, carries out demodulation to the received signal.
Wherein, described the second band pass filter 252 is electrically connected to described low noise amplifier 251 and described wireless chip 21 respectively.
Wherein, described balanced type power amplifier 222 can further include: a 3dB90 ° phase shift Ba Lun 2221, the first power amplifier 2222, the second power amplifier 2223 and the 2nd 3dB90 ° phase shift Ba Lun 2224;
When wireless front end does not comprise the first band pass filter 224, the one 3dB90 ° phase shift Ba Lun 2221, for the described road signal that the Ba Lun receiving 221 is sent, be divided into two paths of signals, and the two paths of signals being divided into is sent to respectively to the first power amplifier 2222, the second power amplifier 2223;
When wireless front end comprises the first band pass filter 224, the one 3dB90 ° phase shift Ba Lun 2221, for the described road signal that the first band pass filter 224 of receiving is sent, be divided into two paths of signals, and the two paths of signals being divided into is sent to respectively to the first power amplifier 2222, the second power amplifier 2223;
The first power amplifier 2222, carries out signal for the signal that a 3dB90 ° phase shift Ba Lun receiving 2221 is sent and amplifies processing, and the signal after processing is sent to the 2nd 3dB90 ° phase shift Ba Lun 2224;
The second power amplifier 2223, carries out signal for the signal that a 3dB90 ° phase shift Ba Lun receiving 2221 is sent and amplifies processing, and the signal after processing is sent to the 2nd 3dB90 ° phase shift Ba Lun 2224;
The 2nd 3dB90 ° phase shift Ba Lun 2224, for after receiving the signal that the first power amplifier 2222 and the second power amplifier 2223 send, is merged into a road by two paths of signals, and the signal after merging is sent to power-sensing circuit 223;
Wherein, in order to guarantee that the power of wireless front end can reach 500mW, it is more than 30dB requiring the yield value of described the first power amplifier 2222 and the second power amplifier 2223;
When wireless front end does not comprise the first band pass filter 224, a described 3dB90 ° phase shift Ba Lun 2221 is electrically connected to described Ba Lun 221; When wireless front end comprises the first band pass filter 224, a described 3dB90 ° phase shift Ba Lun 2221 is electrically connected to described the first band pass filter 224; Described the first power amplifier 2222 is electrically connected to respectively at a described 3dB90 ° phase shift Ba Lun 2221 and described the 2nd 3dB90 ° phase shift Ba Lun 2224; Described the second power amplifier 2223 is electrically connected to respectively at a described 3dB90 ° phase shift Ba Lun 2221 and described the 2nd 3dB90 ° phase shift Ba Lun 2224; Described the 2nd 3dB90 ° phase shift Ba Lun 2224 is electrically connected to described power-sensing circuit 223.
Described wireless chip 21, also for receiving after the power detecting, adjusts power output according to the power that detects, again during transmitted signal, adopts the power output transmitted signal after adjusting.
The wireless differential 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 after described transtation mission circuit is processed the amplification detecting, to described wireless chip, is specially:
Described wireless chip 21 sends to described Ba Lun 221 by the wireless differential signal of modulation, described Ba Lun 221 merges into a road signal by the signal of receiving, and send to described the first band pass filter 224, described the first band pass filter 224 carries out filtering clutter processing by the signal of receiving, and the signal after processing is sent to a described 3dB90 ° phase shift Ba Lun 2221, an a described 3dB90 ° phase shift Ba Lun 2221 is divided into two paths of signals by the signal of receiving, and the two paths of signals being divided into is sent to respectively to described the first power amplifier 2222, described the second power amplifier 2223, described the first power amplifier 2222 carries out signal by the signal of receiving and amplifies processing, and the signal after processing is sent to described the 2nd 3dB90 ° phase shift Ba Lun 2224, described the second power amplifier 2223 carries out signal by the signal of receiving and amplifies processing, and the signal after processing is sent to described the 2nd 3dB90 ° phase shift Ba Lun 2224, described a 2nd 3dB90 ° phase shift Ba Lun 2224 is merged into a road by the two paths of signals of receiving, and the signal after merging is sent to described power-sensing circuit 223, described power-sensing circuit 223 detects the power of the signal of receiving, by the Feedback of Power detecting, give described wireless chip 21, and the signal of receiving is sent to described low pass filter 225, described low pass filter 225 carries out filtering high frequency unwanted signal by the signal of receiving to be processed, and the signal after processing is sent to described switching circuit 23, described switching circuit 23 is input to described equipment interface 24 by the signal of receiving, described equipment interface 24 is by 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, by described wireless chip 21, is received, and is specially:
Described equipment interface 24 sends to described switching circuit 23 by the signal receiving, described switching circuit 23 sends to described low noise amplifier 251 by the signal of receiving, described low noise amplifier 251 promotes to the received signal signal to noise ratio and processes, and the signal after processing is sent to described the second band pass filter 252,252 pairs of signals of receiving of described the second band pass filter carry out filtering clutter processing, and the signal after processing is sent to described wireless chip 21, described wireless chip 21 carries out demodulation to the received signal.
Fig. 3 is the front view of wireless front end of the present invention, as can be seen from Figure 3, wireless chip 21, transtation mission circuit 22, switching circuit 23 and receiving circuit 25 are all placed on a 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 N-type interface, and N-type interface is directly welded on 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 arranges projection, boss is connected with Copper Foil by heat conduction cotton 34, particularly, on heat conduction cotton 34, has caking property, caking property by the heat conduction cotton respectively boss corresponding with fin 33 with Copper Foil is connected, make heat conduction cotton 34 and fin 33 and Copper Foil close contact, so, can increase area of dissipation; Described heat source region refers to switching circuit 23, the first power amplifier 2222 and the second shared region of power amplifier 2223.
Fin 33 is fixed on 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 good thermal conductivity, and price is comparatively cheap.
Based on above-mentioned wireless front end, the present invention also provides a kind of application process of high-power wireless front end, as shown in Figure 4, comprises the following steps:
Step 401: during transmitted signal, wireless chip control switch circuit is transmitted signal, performs step afterwards 402;
Here, the situation control switch circuit that wireless chip sends message according to the subscriber equipment of access is transmitted signal.
Step 402: the wireless differential signal of wireless chip modulation is merged into a road signal, afterwards a described road signal is carried out to power amplification processing, detection power is amplified the power of the signal after processing, and by the Feedback of Power detecting to wireless chip, signal after power amplification is simultaneously processed is through switching circuit, by equipment interface, exported, perform step afterwards 403;
Here, wireless chip receives after the power detecting, and can adjust power output according to the power detecting, and again during transmitted signal, adopts the power output transmitted signal after adjusting;
In order to remove the spurious signal in a described road signal, that is: interference signal, can first carry out filtering clutter processing to a described road signal, then the signal after filtering clutter is processed carries out power amplification processing;
Same, in order to remove the spurious signal in the signal after power amplification is processed, the signal after can processing described power amplification first carries out filtering high frequency unwanted signal to be processed, then passes through switching circuit, by equipment interface, is exported.
Step 403: while receiving signal, wireless chip control switch circuit, for receiving signal, performs step 404 afterwards;
Here, the situation control switch circuit that wireless chip sends message according to the subscriber equipment of access is transmitted signal, give an example, wireless chip knows that by message subscriber equipment is sending data, control switch circuit is transmitted signal, after knowing that by message the data of subscriber equipment are sent, control switch circuit is for receiving signal.
Step 404: the signal of the signal that equipment interface is received after via switching circuit promotes signal to noise ratio and process, and the signal after processing is sent to wireless chip, by wireless chip, signal is carried out to demodulation;
Here, in order to remove the spurious signal in the signal promoting after signal to noise ratio is processed, improve signal quality, the signal after can processing described lifting signal to noise ratio first carries out filtering clutter processing, then the signal after processing is sent to wireless chip.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (17)
1. an application process for high-power wireless front end, is characterized in that, the method comprises:
During transmitted signal, wireless chip control switch circuit is transmitted signal, the wireless differential signal of wireless chip modulation is merged into a road signal by Ba Lun, by a 3dB90 ° phase shift Ba Lun, a described road signal is divided into two paths of signals afterwards, and the two paths of signals being divided into is sent to respectively to the first power amplifier, the second power amplifier carries out power amplification processing, and the two paths of signals after power amplification being processed by the 2nd 3dB90 ° phase shift Ba Lun is merged into a road, then send to power-sensing circuit detection power to amplify the power of the signal after processing, and by the Feedback of Power detecting to wireless chip, signal after power amplification is simultaneously processed is through switching circuit, by equipment interface, exported,
While receiving signal, wireless chip control switch circuit is for receiving signal; The signal of the signal that equipment interface is received after via switching circuit promotes signal to noise ratio and processes, and the signal after processing is sent to wireless chip, by wireless chip, signal carried out to demodulation.
2. method according to claim 1, is characterized in that, before a described road signal is carried out to power amplification processing, the method further comprises:
A described road signal is first carried out to filtering clutter processing, obtain power amplification and process required signal.
3. method according to claim 2, is characterized in that, the signal after power amplification is processed is through switching circuit, and before being exported by equipment interface, the method further comprises:
Signal after described power amplification is processed carries out filtering high frequency unwanted signal to be processed, and obtains through the required signal of switching circuit.
4. according to the method described in claim 1,2 or 3, it is characterized in that, before the signal after processing is sent to wireless chip, the method further comprises:
Signal after described lifting signal to noise ratio is processed first carries out filtering clutter processing, obtains the signal that sends to wireless chip required.
5. method according to claim 4, is characterized in that, by the Feedback of Power detecting to wireless chip after, the method further comprises:
Wireless chip is received after the power detecting, and according to the power detecting, adjusts power output;
Again during transmitted signal, adopt the power output transmitted signal after adjusting.
6. 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; Wherein,
Wireless chip, during for transmitted signal, control switch circuit is transmitted signal, and the wireless differential signal of modulation is sent to transtation mission circuit, and receives the power detecting of transtation mission circuit feedback; While receiving signal, control switch circuit is reception signal, and receives the signal that receiving circuit sends, and carries out to the received signal demodulation;
Transtation mission circuit, for the wireless differential signal that the wireless chip of receiving is sent, merge into a road signal, afterwards a described road signal is carried out to power amplification processing, detection power is amplified the power of the signal after processing, and by the Feedback of Power detecting to wireless chip, the signal after simultaneously power amplification is processed sends to switching circuit;
Described transtation mission circuit comprises: Ba Lun, balanced type power amplifier and power-sensing circuit;
Ba Lun, merges into a road signal for the wireless differential signal that the wireless chip receiving is sent, and a described road signal is sent to balanced type power amplifier;
Balanced type power amplifier, carries out power amplification processing for the described road signal that the Ba Lun receiving is sent, and the signal after processing is sent to power-sensing circuit;
Described balanced type power amplifier comprises: a 3dB90 ° phase shift Ba Lun, the first power amplifier, the second power amplifier and the 2nd 3dB90 ° phase shift Ba Lun;
A described 3dB90 ° phase shift Ba Lun, is divided into two paths of signals for the described road signal that the Ba Lun receiving is sent, and the two paths of signals being divided into is sent to respectively to the first power amplifier, the second power amplifier;
Described the first power amplifier, carries out signal for the signal that a 3dB90 who receives ° of phase shift Ba Lun sent and amplifies processing, and the signal after processing is sent to the 2nd 3dB90 ° phase shift Ba Lun;
Described the second power amplifier, carries out signal for the signal that a 3dB90 who receives ° of phase shift Ba Lun sent and amplifies processing, and the signal after processing is sent to the 2nd 3dB90 ° phase shift Ba Lun;
The 2nd 3dB90 ° phase shift Ba Lun, for after receiving the signal that the first power amplifier and the second power amplifier send, is merged into a road by two paths of signals, and the signal after merging is sent to power-sensing circuit;
Power-sensing circuit, the power of the signal sending for detection of the balanced type power amplifier received, to wireless chip, and sends to switching circuit by the signal of receiving by the Feedback of Power detecting;
Switching circuit, for being controlled by wireless chip, and the signal that transtation mission circuit is sent is input to equipment interface; The signal that the equipment interface of receiving is sent sends to receiving circuit;
Equipment interface, for the signal of output switch circuit input, and sends to switching circuit by the signal receiving;
Receiving circuit, for receiving after the signal of switching circuit transmission, promotes to the received signal signal to noise ratio and processes, and the signal after processing is sent to wireless chip.
7. wireless front end according to claim 6, is characterized in that,
Described receiving circuit further comprises: low noise amplifier;
Wireless chip, during for transmitted signal, control switch circuit is transmitted signal, and the wireless differential signal of modulation is sent to Ba Lun, and the power detecting of received power testing circuit feedback; While receiving signal, control switch circuit is reception signal, and receives the signal that low noise amplifier sends, and carries out to the received signal demodulation;
Switching circuit, for being controlled by wireless chip, and the signal that power-sensing circuit is sent is input to equipment interface; The signal that the equipment interface of receiving is sent sends to low noise amplifier;
Equipment interface, for the signal of output switch circuit input, and sends to switching circuit by the signal receiving;
Low noise amplifier, for receiving after the signal of switching circuit transmission, promotes to the received signal signal to noise ratio and processes, and the signal after processing is sent to wireless chip.
8. wireless front end according to claim 7, is characterized in that, described transtation mission circuit further comprises: the first band pass filter and low pass filter;
Ba Lun, merges into a road signal for the wireless differential signal that the wireless chip of receiving is sent, and a described road signal is sent to the first band pass filter;
The first band pass filter, the described road signal sending for the Ba Lun to receiving carries out filtering clutter processing, and the signal after processing is sent to balanced type power amplifier;
Balanced type power amplifier, carries out power amplification processing for the signal that the band pass filter of receiving is sent, and the signal after processing is sent to power-sensing circuit;
Power-sensing circuit, the power of the signal sending for detection of the balanced type power amplifier received, to wireless chip, and sends to low pass filter by the signal of receiving by the Feedback of Power detecting;
Low pass filter, the signal sending for the power-sensing circuit to receiving carries out filtering high frequency unwanted signal to be processed, and the signal after processing is sent to switching circuit;
Switching circuit, is input to equipment interface for the signal that low pass filter is sent.
9. wireless front end according to claim 7, is characterized in that, described receiving circuit further comprises: the second band pass filter;
Low noise amplifier, for receiving after the signal of switching circuit transmission, promotes to the received signal signal to noise ratio and processes, and the signal after processing is sent to the second band pass filter;
The second band pass filter, the signal sending for the low noise amplifier to receiving carries out filtering clutter processing, and the signal after processing is sent to wireless chip;
Wireless chip, the signal sending for receiving the second band pass filter, carries out demodulation to the received signal.
10. according to the wireless front end described in claim 6 to 9 any one, it is characterized in that described wireless chip, also for receiving after the power detecting, according to the power that detects, adjust power output, again during transmitted signal, adopt the power output transmitted signal after adjusting.
11. 1 kinds of high-power wireless front ends, 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 to described transtation mission circuit, switching circuit and receiving circuit respectively; Described transtation mission circuit is electrically connected to described switching circuit; Described switching circuit is electrically connected to equipment interface; Described receiving circuit is electrically connected to described switching circuit;
The wireless differential signal of described wireless chip modulation passes through described transtation mission circuit and described switching circuit successively, by described equipment interface, is exported;
The signal that described equipment interface receives passes through described switching circuit and described receiving circuit successively, by described wireless chip, is received;
The Feedback of Power of the signal after described transtation mission circuit is processed the amplification detecting is to described wireless chip;
Described transtation mission circuit comprises: Ba Lun, balanced type power amplifier and power-sensing circuit; Described wireless chip is electrically connected to described Ba Lun; Described Ba Lun is electrically connected to described balanced type power amplifier; Described balanced type power amplifier is electrically connected to described power-sensing circuit; Described power-sensing circuit is electrically connected to described switching circuit;
Described balanced type power amplifier further comprises: a 3dB90 ° phase shift Ba Lun, the first power amplifier, the second power amplifier and the 2nd 3dB90 ° phase shift Ba Lun;
Described the first power amplifier is electrically connected to respectively at a described 3dB90 ° phase shift Ba Lun and described the 2nd 3dB90 ° of phase shift Ba Lun; Described the second power amplifier is electrically connected to respectively at a described 3dB90 ° phase shift Ba Lun and described the 2nd 3dB90 ° of phase shift Ba Lun.
12. wireless front ends according to claim 11, is characterized in that, described receiving circuit further comprises: low noise amplifier;
Described wireless chip is electrically connected to described power-sensing circuit, described switching circuit and described low noise amplifier respectively; Described low noise amplifier is electrically connected to described switching circuit.
13. wireless front ends according to claim 12, is characterized in that, described transtation mission circuit further comprises: the first band pass filter and low pass filter;
Described the first band pass filter is electrically connected to described Ba Lun and described balanced type power amplifier respectively; Described power-sensing circuit is electrically connected to described low pass filter; Described low pass filter is electrically connected to described switching circuit.
14. wireless front ends according to claim 12, is characterized in that, described receiving circuit further comprises: the second band pass filter;
Described the second band pass filter is electrically connected to described low noise amplifier respectively and described wireless chip is electrically connected to.
15. according to claim 11 to the wireless front end described in 14 any one, it is characterized in that, described wireless chip, described transtation mission circuit, described switching circuit and described receiving circuit are placed on a mainboard; Described equipment interface is directly welded on mainboard.
16. wireless front ends according to claim 15, is characterized in that, the position corresponding at fin arranges projection, and boss is connected with the Copper Foil of described mainboard by heat conduction cotton.
17. wireless front ends according to claim 16, is characterized in that, the material that the material of described fin is heat conduction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010236127.5A CN101917758B (en) | 2010-07-23 | 2010-07-23 | High-power wireless front end and application method thereof |
| PCT/CN2010/077377 WO2012009878A1 (en) | 2010-07-23 | 2010-09-27 | High power wireless front-end and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010236127.5A CN101917758B (en) | 2010-07-23 | 2010-07-23 | High-power wireless front end and application method thereof |
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| Publication Number | Publication Date |
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| CN101917758A CN101917758A (en) | 2010-12-15 |
| CN101917758B true CN101917758B (en) | 2014-12-10 |
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| CN201010236127.5A Expired - Fee Related CN101917758B (en) | 2010-07-23 | 2010-07-23 | High-power wireless front end and application method thereof |
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| WO (1) | WO2012009878A1 (en) |
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| CN102521959B (en) * | 2011-12-23 | 2014-07-16 | 深圳市思达仪表有限公司 | Non-feedback communication converter and communication method |
| CN104617966A (en) * | 2014-12-31 | 2015-05-13 | 杭州敦崇科技股份有限公司 | WLAN (wireless local area network) adjacent channel interference resisting device and method thereof |
| CN106324336B (en) * | 2015-06-30 | 2019-01-04 | 展讯通信（上海）有限公司 | A kind of power-sensing circuit, power amplifier module and calibration of power circuit |
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| CN101199243A (en) * | 2005-06-17 | 2008-06-11 | Cts公司 | RF front-end module for picocell and microcell base station transceivers |
| CN1897461A (en) * | 2005-07-13 | 2007-01-17 | 京瓷株式会社 | Filter device, multiband filter, duplexer and communications equipment using the filter device |
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| Publication number | Publication date |
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| CN101917758A (en) | 2010-12-15 |
| WO2012009878A1 (en) | 2012-01-26 |
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