CN103517458A - WIFI long-distance transmission module with double-direction frequency conversion technology - Google Patents
WIFI long-distance transmission module with double-direction frequency conversion technology Download PDFInfo
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- CN103517458A CN103517458A CN201310455742.9A CN201310455742A CN103517458A CN 103517458 A CN103517458 A CN 103517458A CN 201310455742 A CN201310455742 A CN 201310455742A CN 103517458 A CN103517458 A CN 103517458A
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Abstract
The invention discloses a WIFI long-distance transmission module with a double-direction frequency conversion technology. The WIFI long-distance transmission module comprises a transmit-receive antenna, a frequency conversion module, a control module, a local oscillator module and a power supply module. The frequency conversion module is connected with the local oscillator module which provides local oscillator signals. The frequency conversion module receives or transmits WIFI signals through the transmit-receive antenna. According to the WIFI long-distance transmission module with the double-direction frequency conversion technology, when signals are sent, the signals are subjected to down-conversion to 0.4GHz-0.485 GHz, then transmission is carried out, the wave length of signals is increased, long-wave signals are more stable than short-wave signal, a transmission process cannot be interfered by outside easily, damping is low, diffraction capacity is strong, and transmission distance is long. The module has the advantages of being large in sending power, high in receive sensitivity and low in transmission loss, and accordingly signal transmission distance is greatly increased, the transmitter covering range is increased, the deploy amount of a base station can be lowered, and the cost is the whole project is lowered.
Description
Technical field
The present invention relates to wireless communication technology field, be specifically related to a kind of long-distance transmissions module of using the WIFI communication of two-way converter technique.
Background technology
WIFI (Wireless Fidelity), is the abbreviation of adopting wireless fidelity technology, be a kind of can be by terminals such as PC, handheld devices (as PDA, mobile phone) with the interconnected technology of wireless mode.Because the frequency range of Wi-Fi is worldwide without any telecom operation license, so it provides operable in a world wide, the wireless air interface that expense is extremely cheap and data bandwidth is high.User can be in Wi-Fi overlay area fast browsing webpage, answer and call whenever and wherever possible.Had Wi-Fi function we make a long-distance call (comprising international long-distance), browsing page, send and receive e-mail, music download, digital photograph transmission etc., then problem slow without worry speed and that cost is high.
WIFI has mainly utilized 2.4GHz and two frequency ranges of 5GHz, especially in the majority with the application of 2.4GHz frequency range.In prior art, the band frequency adopting due to WIFI technology is high, causes the wavelength ratio of signal shorter, and signal is decayed very fast in transmitting procedure, so the communication distance of WIFI signal is very short in prior art.
Summary of the invention
The object of the invention is to provide a kind of WIFI long-distance transmissions module of using two-way converter technique, and it effectively expands the transmission range of WIFI signal, and promotes communication quality.
In order to solve these problems of the prior art, technical scheme provided by the invention is:
A kind of WIFI long-distance transmissions module of using two-way converter technique, described WIFI long-distance transmissions module comprises dual-mode antenna, frequency-variable module, control module, local oscillator module and power module, described frequency-variable module is connected with the local oscillator module of local oscillation signal is provided, and described frequency-variable module receives by dual-mode antenna or launches WIFI signal.
For technique scheme, inventor also has further optimization embodiment.
As optimization, described frequency-variable module comprises up-converter module and down conversion module, and up-converter module is used for receiving outside WIFI signal, and down conversion module is used for launching WIFI signal.
Further, down conversion module comprises 2.4GHz～2.485GHz band pass filter, frequency mixer, 0.4GHz～0.485GHz band pass filter, the power amplifier connecting successively, input signal enters this module to be undertaken by frequency mixer and local oscillation signal, carrying out mixing after filtering processing by 2.4GHz～2.485GHz band pass filter, through 0.4GHz～0.485GHz band pass filter, obtain down-conversion signal again, finally by overpower amplifier amplifying signal, from dual-mode antenna, launch, tranmitting frequency is 0.4GHz～0.485GHz.
Further, up-converter module comprises the band pass filter of the 0.4GHz～0.485HGZ connecting successively, low noise amplifier, the band pass filter of 0.4GHz～0.485HGZ, frequency mixer, 2.4GHz～2.485GHz band pass filter and amplifier, in up-converter module, the signal that dual-mode antenna receives first passes through the band pass filter of 0.4GHz～0.485HGZ after radio-frequency (RF) switch, by low noise amplifier, signal strength signal intensity is amplified again, again through 0.4GHz～0.485GHz band pass filter filtering clutter, then at up-conversion mixer place, carry out mixing with local oscillation signal, again by after 2.4GHz～2.485GHz band pass filter filtering clutter, extract the WIFI signal of 2.4GHz～2.485GHz, through amplifier, signal is amplified, finally from the radio-frequency (RF) switch of tail end, export.
Further, control module comprises wave detector, comparator, and input signal is coupled to control module through three-dB coupler, and described control module is passed through wave detector detection signal strength,
If signal strength signal intensity detected, be greater than threshold values, judgement is emission state, and control module is opened down conversion module and closed up-converter module, and now down conversion module starts the signal to dual-mode antenna transmitting 0.4GHz～0.485GHz;
If the signal that control module detects is less than threshold values, judgement is accepting state, and control module is opened up-converter module, and closes down conversion module, and now module starts to receive 0.4GHz～0.485GHz signal from dual-mode antenna.
As optimization, described local oscillator module comprises temperature compensating crystal oscillator, single-chip microcomputer, frequency synthesizer, band pass filter, buffer amplifier and power splitter, the local oscillation signal of local oscillator module output two-way 2GHz, the local oscillation signal of two-way 2GHz passes through respectively band pass filter through buffer amplifier, is input to the frequency mixer in up-converter module and down conversion module.
With respect to scheme of the prior art, advantage of the present invention is:
Traditional WIFI communication has mainly utilized this frequency range of 2.4GHz～2.485GHz, but because the frequency of this frequency range is higher, the wavelength of signal is just shorter, and jitter, is easily interfered, and decay is very fast in transmitting procedure.
And the WIFI long-distance transmissions module of the two-way converter technique of use described in the invention, utilize two-way converter technique, when transmitted signal, down-converting the signals to 0.4GHz～0.485GHz transmits again, increase the wavelength of signal, the long-wave signal short-wave signal of comparing is more stable, is not subject to external interference in transmitting procedure, decays little, diffracting power is strong, and transmission range is farther.And this module has advantages of that transmitting power is large, receiving sensitivity is high, transmission loss is little, thereby greatly increased the transmitting range of signal, it is large that transmitter coverage becomes, and can reduce the deployment amount of base station, reduces the cost of whole engineering.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is the theory diagram of the embodiment of the present invention;
Wherein: 1 is dual-mode antenna; 2 and 10 is the band pass filter of 2.4GHz～2.485GHz; 3 is down-conversion mixer; 4,6 and 8 band pass filters that are 0.4GHz～0.485GHz; 5 is power amplifier; 7 is low noise amplifier; 9 is up-conversion mixer; 11 is amplifier; 12 is the output frequency local oscillator module that is 2GHz; 13 is control module.
Embodiment
Below in conjunction with specific embodiment, such scheme is described further.Should be understood that these embodiment are not limited to limit the scope of the invention for the present invention is described.The implementation condition adopting in embodiment can be done further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in normal experiment.
embodiment:
The present embodiment has been described a kind of WIFI long-distance transmissions module of using two-way converter technique, its theory diagram as shown in Figure 1, described WIFI long-distance transmissions module comprises dual-mode antenna 1, frequency-variable module, control module 13, local oscillator module 12 and power module, described frequency-variable module is connected with the local oscillator module 12 of local oscillation signal is provided, and described frequency-variable module receives by dual-mode antenna 1 or launches WIFI signal.
Described frequency-variable module comprises up-converter module and down conversion module, and up-converter module is used for receiving outside WIFI signal, and down conversion module is used for launching WIFI signal.
Down conversion module comprises 2.4GHz～2.485GHz band pass filter 2, down-conversion mixer 3,0.4GHz～0.485GHz band pass filter 4, the power amplifier 5 connecting successively, input signal enters this module to be undertaken by down-conversion mixer 3 and local oscillation signal, carrying out mixing after filtering processing by 2.4GHz～2.485GHz band pass filter 2, through 0.4GHz～0.485GHz band pass filter 4, obtain down-conversion signal again, finally by overpower amplifier 5 amplifying signals, from dual-mode antenna 1, launch, tranmitting frequency is 0.4GHz～0.485GHz.
Wherein, because 2.4GHz～2.485GHz signal of local oscillation signal and input is when down-conversion mixer 3 carries out mixing, can produce reflected signal, transmit while arriving local oscillator module 12, can local oscillator be produced and be disturbed, thereby cause the local oscillation signal frequency producing to be shaken, and then produce frequency and phase error, cause the distortion of down-conversion mixed frequency signal, affect emission rate.So the present invention has added band pass filter and buffer amplifier between local oscillator module 12 and down-conversion mixer 3.Signal beyond this band pass filter filtering 2GHz, when this buffer amplifier amplifies forward signal, reverse signal is had to very large buffer action, for down-conversion mixer 3, to the interference signal between local oscillator, have obvious inhibitory action, solved the interference problem of reflected signal.
In addition, described local oscillator module 12 comprises temperature compensating crystal oscillator, single-chip microcomputer, frequency synthesizer, band pass filter, buffer amplifier and power splitter, the local oscillation signal of local oscillator module 12 output two-way 2GHz, the local oscillation signal of two-way 2GHz passes through respectively band pass filter through buffer amplifier, is input to the frequency mixer in up-converter module and down conversion module.
Up-converter module comprises successively band pass filter 6, the low noise amplifier 7 of the 0.4GHz～0.485HGZ connecting, band pass filter 8, up-conversion mixer 9,2.4GHz～2.485GHz band pass filter 10 and the amplifier 11 of 0.4GHz～0.485HGZ.
In up-converter module, the signal that dual-mode antenna 1 receives first passes through the band pass filter 6 of 0.4GHz～0.485HGZ after radio-frequency (RF) switch, by 7 pairs of signal strength signal intensities of low noise amplifier, amplify again, again through 0.4GHz～0.485GHz band pass filter 8 filtering clutters, then at up-conversion mixer 9 places, carry out mixing with local oscillation signal, again by after 2.4GHz～2.485GHz band pass filter 10 filtering clutters, extract the WIFI signal of 2.4GHz～2.485GHz, through amplifier 11, signal is amplified, finally from the radio-frequency (RF) switch of tail end, export.
Frequency mixer in the present embodiment (comprising up-conversion mixer 9 and down-conversion mixer 3) adopts two balanced structures, it is extra-high-speed level pipe pile structure, this structure has good 1db compression level and Gao Sanjie crosspoint, thereby can make the distortion product of frequency mixer be down to minimum, and also can not damage greatly because of the signal strength signal intensity of input, stability is relatively good.
Control module 13 comprises wave detector, comparator, and input signal is coupled to control module 13 through three-dB coupler, and described control module 13 is passed through wave detector detection signal strength,
If signal strength signal intensity detected, be greater than threshold values, judgement is emission state, and control module 13 is opened down conversion module and closed up-converter module, and now down conversion module starts to dual-mode antenna 1 transmitting 0.4GHz～0.485GHz signal;
If the signal that control module 13 detects is less than threshold values, judgement is accepting state, and control module 13 is opened up-converter module, and closes down conversion module, and now module starts to receive 0.4GHz～0.485GHz signal from dual-mode antenna 1.
Above-mentioned example is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalent transformations that Spirit Essence is done according to the present invention or modification, within all should being encompassed in protection scope of the present invention.
Claims (6)
1. a WIFI long-distance transmissions module of using two-way converter technique, it is characterized in that, described WIFI long-distance transmissions module comprises dual-mode antenna, frequency-variable module, control module, local oscillator module and power module, described frequency-variable module is connected with the local oscillator module of local oscillation signal is provided, and described frequency-variable module receives by dual-mode antenna or launches WIFI signal.
2. the WIFI long-distance transmissions module of the two-way converter technique of use according to claim 1, it is characterized in that, described frequency-variable module comprises up-converter module and down conversion module, and up-converter module is used for receiving outside WIFI signal, and down conversion module is used for launching WIFI signal.
3. the WIFI long-distance transmissions module of the two-way converter technique of use according to claim 2, it is characterized in that, down conversion module comprises the 2.4GHz～2.485GHz band pass filter connecting successively, frequency mixer, 0.4GHz～0.485GHz band pass filter, power amplifier, input signal enters this module to be undertaken by frequency mixer and local oscillation signal, carrying out mixing after filtering processing by 2.4GHz～2.485GHz band pass filter, through 0.4GHz～0.485GHz band pass filter, obtain down-conversion signal again, finally by overpower amplifier amplifying signal, from dual-mode antenna, launch, tranmitting frequency is 0.4GHz～0.485GHz.
4. the WIFI long-distance transmissions module of the two-way converter technique of use according to claim 1, it is characterized in that, up-converter module comprises the band pass filter of the 0.4GHz～0.485HGZ connecting successively, low noise amplifier, the band pass filter of 0.4GHz～0.485HGZ, frequency mixer, 2.4GHz～2.485GHz band pass filter and amplifier, in up-converter module, the signal that dual-mode antenna receives first passes through the band pass filter of 0.4GHz～0.485HGZ after radio-frequency (RF) switch, by low noise amplifier, signal strength signal intensity is amplified again, again through 0.4GHz～0.485GHz band pass filter filtering clutter, then at up-conversion mixer place, carry out mixing with local oscillation signal, again by after 2.4GHz～2.485GHz band pass filter filtering clutter, extract the WIFI signal of 2.4GHz～2.485GHz, through amplifier, signal is amplified, finally from the radio-frequency (RF) switch of tail end, export.
5. according to the WIFI long-distance transmissions module of the two-way converter technique of use described in claim 3 or 4, it is characterized in that, control module comprises wave detector, comparator, and input signal is coupled to control module through three-dB coupler, described control module is by wave detector detection signal strength
If signal strength signal intensity detected, be greater than threshold values, judgement is emission state, and control module is opened down conversion module and closed up-converter module, and now down conversion module starts the signal to dual-mode antenna transmitting 0.4GHz～0.485GHz;
If the signal that control module detects is less than threshold values, judgement is accepting state, and control module is opened up-converter module, and closes down conversion module, and now module starts to receive 0.4GHz～0.485GHz signal from dual-mode antenna.
6. the WIFI long-distance transmissions module of the two-way converter technique of use according to claim 1, it is characterized in that, described local oscillator module comprises temperature compensating crystal oscillator, single-chip microcomputer, frequency synthesizer, band pass filter, buffer amplifier and power splitter, the local oscillation signal of local oscillator module output two-way 2GHz, the local oscillation signal of two-way 2GHz passes through respectively band pass filter through buffer amplifier, is input to the frequency mixer in up-converter module and down conversion module.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124992A (en) * | 2014-07-11 | 2014-10-29 | 苏州华士无线科技有限公司 | Wireless fidelity (WIFI) radio frequency module by double-way frequency encryption |
| CN104218903A (en) * | 2014-08-15 | 2014-12-17 | 苏州华士无线科技有限公司 | WiFi (wireless fidelity) signal amplifier based on automatic gain control technology |
| CN104219792A (en) * | 2014-08-26 | 2014-12-17 | 长江水利委员会长江科学院 | Zigbee variable-frequency wireless transmission equipment and underwater monitoring system |
| CN105577123A (en) * | 2015-12-17 | 2016-05-11 | 北京锐安科技有限公司 | Up-conversion circuit |
| CN106788323A (en) * | 2016-12-21 | 2017-05-31 | 北京中科飞鸿科技有限公司 | A kind of high performance mini bidirectional filtering amplifier module |
| CN108155916A (en) * | 2018-01-31 | 2018-06-12 | 深圳市盛路物联通讯技术有限公司 | Rf signal reception circuit, circuit board, chip and terminal |
| CN109104222A (en) * | 2018-07-27 | 2018-12-28 | 湖南时变通讯科技有限公司 | It is a kind of based on millimeter wave-microwave multiple-input and multiple-output cordless communication network |
| CN113347737A (en) * | 2020-02-18 | 2021-09-03 | 中移物联网有限公司 | Network device and wireless communication system |
| CN114745012A (en) * | 2021-01-07 | 2022-07-12 | Oppo广东移动通信有限公司 | Terminal and car |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255630A (en) * | 2011-01-14 | 2011-11-23 | 苏州英诺迅科技有限公司 | Wireless fidelity (WiFi) frequency hopping remote transmission module |
| CN102457297A (en) * | 2010-10-19 | 2012-05-16 | 中国科学院微电子研究所 | Radio transceiver |
| EP2587688A2 (en) * | 2011-10-28 | 2013-05-01 | Broadcom Corporation | Reverse channel estimation for RF transceiver with beamforming antenna |
| CN203482405U (en) * | 2013-09-29 | 2014-03-12 | 苏州华士无线科技有限公司 | WIFI long-distance transmission module with bidirectional frequency conversion technology |
-
2013
- 2013-09-29 CN CN201310455742.9A patent/CN103517458B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457297A (en) * | 2010-10-19 | 2012-05-16 | 中国科学院微电子研究所 | Radio transceiver |
| CN102255630A (en) * | 2011-01-14 | 2011-11-23 | 苏州英诺迅科技有限公司 | Wireless fidelity (WiFi) frequency hopping remote transmission module |
| EP2587688A2 (en) * | 2011-10-28 | 2013-05-01 | Broadcom Corporation | Reverse channel estimation for RF transceiver with beamforming antenna |
| CN203482405U (en) * | 2013-09-29 | 2014-03-12 | 苏州华士无线科技有限公司 | WIFI long-distance transmission module with bidirectional frequency conversion technology |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124992A (en) * | 2014-07-11 | 2014-10-29 | 苏州华士无线科技有限公司 | Wireless fidelity (WIFI) radio frequency module by double-way frequency encryption |
| CN104218903A (en) * | 2014-08-15 | 2014-12-17 | 苏州华士无线科技有限公司 | WiFi (wireless fidelity) signal amplifier based on automatic gain control technology |
| CN104219792A (en) * | 2014-08-26 | 2014-12-17 | 长江水利委员会长江科学院 | Zigbee variable-frequency wireless transmission equipment and underwater monitoring system |
| CN105577123A (en) * | 2015-12-17 | 2016-05-11 | 北京锐安科技有限公司 | Up-conversion circuit |
| CN106788323A (en) * | 2016-12-21 | 2017-05-31 | 北京中科飞鸿科技有限公司 | A kind of high performance mini bidirectional filtering amplifier module |
| CN108155916A (en) * | 2018-01-31 | 2018-06-12 | 深圳市盛路物联通讯技术有限公司 | Rf signal reception circuit, circuit board, chip and terminal |
| CN109104222A (en) * | 2018-07-27 | 2018-12-28 | 湖南时变通讯科技有限公司 | It is a kind of based on millimeter wave-microwave multiple-input and multiple-output cordless communication network |
| WO2020020320A1 (en) * | 2018-07-27 | 2020-01-30 | 湖南时变通讯科技有限公司 | Mmw-microwave mimo based wireless communication network |
| CN113347737A (en) * | 2020-02-18 | 2021-09-03 | 中移物联网有限公司 | Network device and wireless communication system |
| CN114745012A (en) * | 2021-01-07 | 2022-07-12 | Oppo广东移动通信有限公司 | Terminal and car |
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