CN2798424Y - Intelligent radio frequency optical transmission module with integrated power amplifying and low noise amplifying - Google Patents
Intelligent radio frequency optical transmission module with integrated power amplifying and low noise amplifying Download PDFInfo
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- CN2798424Y CN2798424Y CNU2005200959306U CN200520095930U CN2798424Y CN 2798424 Y CN2798424 Y CN 2798424Y CN U2005200959306 U CNU2005200959306 U CN U2005200959306U CN 200520095930 U CN200520095930 U CN 200520095930U CN 2798424 Y CN2798424 Y CN 2798424Y
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Abstract
The utility model relates to an intelligent radio frequency light transmission module with integrated power amplification and low-noise amplification. The power amplification and the low-noise amplification are integrated in the intelligent radio frequency light transmission module. An original intelligent radio frequency light transmission module becomes integrated in a high grade. Therefore, the utility model realizes that one module can complete the functions of multiple modules. The intelligent radio frequency light transmission module integrated with the power amplification and the low-noise amplification makes optical-fiber direct amplifier stations not need to add power amplification modules or low-noise modules any more. The utility model fundamentally simplifies the structure and the production of optical-fiber direct amplifier stations, and realizes the single-module architecture of optical-fiber direct amplifier stations. The occurrence of the intelligent radio frequency light transmission module integrated in a high grade starts the new age of the high-grade integration and the high-grade intelligence of optical-fiber direct amplifier stations.
Description
Technical field
The utility model belongs to the radio frequency communication devices field, is specifically related to the intelligent RF light delivery module of a kind of integrated amplifier and LNA.
Background technology
Existing intelligent RF light delivery module structural principle is intelligent.Its basic functional principle is: radiofrequency signal is through radio frequency input matching circuit and high-pass filtering circuit, deliver to drive circuit for laser together with by FSK modulation circuit and low-pass filter circuit, the control signal drive laser together of output converts radiofrequency signal to light signal and is exported by optical fiber.Light signal is converted to the signal of telecommunication through PIN light/electric transducer, the signal of telecommunication is through the overmatching amplifying circuit, signal is amplified to improve signal gain, pass through low-frequency filter circuit and high-frequency filter circuit then, obtain fsk modulated signal and radio frequency rf signal respectively, Shu Chu radiofrequency signal is passed through power amplifier module and the LNA module in the optical fiber repeater more simultaneously, it is carried out pass to after the processing such as power amplification and filtering two merit devices and sends.As everyone knows, power amplifier and LNA are the core components of direct amplification machine.Because existing intelligent RF light delivery module is integrated amplifier and LNA not, therefore the repeater also need add power amplifier module and LNA module when engineering is used.
Summary of the invention
The purpose of this utility model is in order to reduce the module number of optical fiber repeater, to reduce the cost of optical fiber repeater, improve the integrated level of radio-frequency light transmission module, the intelligent RF light delivery module of a kind of integrated amplifier and LNA being provided.With power amplifier module and LNA module in the middle of the intelligent RF light delivery module, provide a kind of height integrated intelligent RF light delivery module, to solve the function that above-mentioned existing intelligent RF light delivery module fails to realize, the integrated level of existing intelligent RF light delivery module is improved greatly.
The technical solution of the utility model is as follows:
The intelligent RF light delivery module of integrated amplifier and LNA, power amplifier module and LNA module are integrated in original intelligent RF light delivery module, it is characterized in that: this radio-frequency light transmission module comprises radio frequency/light signal transition components, optical fiber/radiofrequency signal transition components, power amplifier components, LNA assembly and Based Intelligent Control assembly; The Based Intelligent Control assembly adopts single-chip microcomputer and A/D change-over circuit, from described radio frequency/light signal transition components, optical fiber/radiofrequency signal transition components sampled light power, radiofrequency signal power, through information processing, regulate optical power attenuation and radio-frequency power decay in control described optical fiber/radiofrequency signal transition components, to regulate described intelligent RF light delivery module power output; At the signal downlink link, radiofrequency signal is amplified by power amplifier components and is launched from antenna through after including the intelligent RF light delivery module of optical fiber/radiofrequency signal transition components; At the signal uplink link, the radiofrequency signal from antenna receives after the amplification of LNA assembly, enters the intelligent RF light delivery module that includes radio frequency/light signal transition components again, is converted to light signal, passes through Optical Fiber Transmission.
Described radio frequency/light signal transition components: comprise radio frequency input coupling 1, high-pass filtering 2, power amplifier, LNA circuit, drive circuit 3, laser 4, FSK modulator 5 and low-pass filtering 6 and; Radiofrequency signal is received by antenna, sends into laser 4 through input coupling 1, filtering 2 and converts light signal to and send, and simultaneously the data flow of monitoring is also sent into laser 4 through FSK modulation 5 and low-pass filtering 6 and converts light signal to and send.
Described optical fiber/radiofrequency signal transition components: comprise photoelectric switching circuit 9, coupling amplifying circuit 10, filter circuit 13, three grades of radio frequency amplifying circuits (14,16,19), secondary numerical-control attenuator (15,17), impedance matching circuit 18, power amplifier, LNA circuit, low-pass filter circuit 10 and FSK demodulator circuits 12; The light signal of being come by optical fiber converts the signal of telecommunication to by after mating amplification 10 through opto-electronic conversion 9, after radio frequency amplification (14,16,19) and numerical control decay (15,17), send by radio-frequency antenna, send into low-pass filter circuit 11 simultaneously and leach low frequency signal and send into FSK demodulation 12 and must arrive the monitor message that the opposite end is brought.
Described power amplifier components: comprise radio-frequency (RF) power amplification IC and filtering, match circuit; Radiofrequency signal is sent to radio-frequency (RF) power amplification IC after filtering, coupling, through radio-frequency (RF) power amplification IC radiofrequency signal is carried out power amplification, and then the radiofrequency signal after will amplifying sends.
Described LNA assembly: comprise radio frequency LNA IC and filtering, match circuit; Radiofrequency signal is sent to radio frequency LNA IC after filtering, coupling, IC amplifies signal through the radio frequency LNA, make signal have better signal to noise ratio under the situation of higher receiving sensitivity, and then the radiofrequency signal after will amplifying sends.
Network management interface design at radio-frequency light transmission module has proposed standard RS232 transceiving chip IC1 and RS485 transceiving chip U14.
The advantage of LNA is as follows in the intelligent RF light delivery module of the utility model integrated amplifier and LNA: 1, the very high linearity; 2, low noise factor; Wherein, the feature of integrated IC MGA53543 is as follows: the linearity that (1) is very high; (2) very low noise factor; (3) product specification has good consistency; (4) can be used for the frequency of 1.9GHz; (5) OIP3 can reach 39db; (6) gain can reach 15.4db.
Description of drawings
Fig. 1 is existing intelligent RF light delivery module schematic diagram.
Fig. 2 is the application schematic diagram of existing intelligent RF light delivery module at optical fiber repeater.
Fig. 3 is a LNA circuit diagram of the present utility model.
Fig. 4 is power amplifier figure of the present utility model.
Fig. 5 is the application schematic diagram of the utility model at optical fiber repeater.
Fig. 6 the utility model circuit theory diagrams.
Embodiment
The utility model will be further described in conjunction with the accompanying drawings.
Because radiofrequency signal has such feature in the middle of transmission: the bottom noise is seen in the upward signal adjustment, and the power amplifier linearity is seen in the downstream signal adjustment, and therefore, the situation that LNA and power amplifier are used can influence the quality of this radio signal transmission greatly.
Low noise circuit is designed to: the noiseproof feature of amplifier fore-end is maximum to the noiseproof feature contribution of whole module, and we have selected the smaller device MGA53543 of noise factor for use in the LNA major part.Adopt Low-noise Design Technology to comprise low noise pre-amplifier and Linear Power Amplifier, mainly consider under the situation of higher receiving sensitivity, to make signal have better signal to noise ratio.Its distinguishing feature is to adopt the superlinearity power amplifier, and the work of assurance multichannel does not have clutter.Fig. 3 is the LNA schematic diagram.
The Linear Power Amplifier technology
The modulation system of CDMA systems and the utilance of frequency spectrum have also proposed very high requirement to the linearity of power amplifier, and be all relevant with the performance of Linear Power Amplifier as indexs such as ACPR, IMD3.Power amplifier schematic diagram such as Fig. 4 in the intelligent RF light delivery module of the utility model integrated amplifier and LNA for example, for GSM and cdma network, employing be the duplex mode of FDD, therefore, signal is divided into the uplink and downlink direction.From the influence for network, upward signal will enter the base station, if the base station is affected, the support in the base station scope that relates to must be double cautious.All repeater access base stations all exist data feedback channel, and we wish that the noise power that is linked into the base station receiver inlet is less than-120dBm.This is to be determined jointly by stray radiation level in the work zone of equipment itself and up gain.At first, the stray radiation level in the work zone will meet relevant standard, requires in the band spuiously less than-36dBm as GSM, and CDMA requires in the band spuious less than-22dBm, and we can claim that also this is a static bottom noise.Transfer in the survey in reality, need or have active dried putting the antenna-feedback system of retransmitting end, being generally indoor distributed system all inserts, see the bottom noise at alms giver's port of repeater, the noise of this moment can have the noise in some spaces, claim dynamic noise again, the up bottom noise of repeater is made of jointly static noise and dynamic noise.Static noise is can be by calculating, and dynamic noise can only obtain by test.Transfer when surveying and to adjust up gain and calculate this noise through the active path loss, different repeaters is calculated different, whether the noise power that arrives base station receiver be controlled at-120dBm in, only control upstream noise, the repeater just can not form the base station and disturb.
The power that inserts signal and descending gain are depended in the adjustment of downstream signal, and when having only signal when descending input with the gain coupling, just can make the power amplifier output of repeater is linear signal.Equipment is in manufacturing process, repeater equipment can detect the size of third-order intermodulation product according to related standards, stipulated the level of input signal during detection, if in the practical application, input signal amplitude is excessive, and perhaps gain is provided with excessive, the non-linear of signal output caused in the capital, and the output of nonlinear properties will inevitably influence the quality of output signal, thereby causes the quality of mobile phone received signal to descend.Therefore, we are strict with various indexs when design power amplifier and LNA in the utility model, guarantee the signal communication quality.
Claims (6)
1, the intelligent RF light delivery module of integrated amplifier and LNA, power amplifier module and LNA module are integrated in original intelligent RF light delivery module, it is characterized in that: this radio-frequency light transmission module comprises radio frequency/light signal transition components, optical fiber/radiofrequency signal transition components, power amplifier components, LNA assembly and Based Intelligent Control assembly; The Based Intelligent Control assembly adopts single-chip microcomputer and A/D change-over circuit, from described radio frequency/light signal transition components, optical fiber/radiofrequency signal transition components sampled light power, radiofrequency signal power, through information processing, regulate optical power attenuation and radio-frequency power decay in control described optical fiber/radiofrequency signal transition components, to regulate described intelligent RF light delivery module power output; At the signal downlink link, radiofrequency signal is amplified by power amplifier components and is launched from antenna through after including the intelligent RF light delivery module of optical fiber/radiofrequency signal transition components; At the signal uplink link, the radiofrequency signal from antenna receives after the amplification of LNA assembly, enters the intelligent RF light delivery module that includes radio frequency/light signal transition components again, is converted to light signal, passes through Optical Fiber Transmission.
2, radio-frequency light transmission module according to claim 1 is characterized in that: described radio frequency/light signal transition components: comprise radio frequency input coupling (1), high-pass filtering (2), power amplifier, LNA circuit, drive circuit (3), laser (4), FSK modulator (5) and low-pass filtering (6) and; Radiofrequency signal is received by antenna, send into laser (4) through input coupling (1), filtering (2) and convert light signal to and send, simultaneously the data flow of monitoring is also sent into laser (4) through FSK modulation (5) and low-pass filtering (6) and convert light signal to and send.
3, radio-frequency light transmission module according to claim 1 is characterized in that: described optical fiber/radiofrequency signal transition components: comprise photoelectric switching circuit (9), coupling amplifying circuit (10), filter circuit (13), three grades of radio frequency amplifying circuits (14,16,19), secondary numerical-control attenuator (15,17), impedance matching circuit (18), power amplifier, LNA circuit, low-pass filter circuit (10) and FSK demodulator circuit (12); The light signal of being come by optical fiber converts the signal of telecommunication to by after mating amplification (10) through opto-electronic conversion (9), after radio frequency amplification (14,16,19) and numerical control decay (15,17), send by radio-frequency antenna, send into low-pass filter circuit (11) simultaneously and leach low frequency signal and send into FSK demodulation (12) and must arrive the monitor message that the opposite end is brought.
4, radio-frequency light transmission module according to claim 1 is characterized in that: described power amplifier components: comprise radio-frequency (RF) power amplification IC and filtering, match circuit; Radiofrequency signal is sent to radio-frequency (RF) power amplification IC after filtering, coupling, through radio-frequency (RF) power amplification IC radiofrequency signal is carried out power amplification, and then the radiofrequency signal after will amplifying sends.
5, radio-frequency light transmission module according to claim 1 is characterized in that: described LNA assembly: comprise radio frequency LNA IC and filtering, match circuit; Radiofrequency signal is sent to radio frequency LNA IC after filtering, coupling, IC amplifies signal through the radio frequency LNA, make signal have better signal to noise ratio under the situation of higher receiving sensitivity, and then the radiofrequency signal after will amplifying sends.
6, the radio-frequency light transmission module one of described according to claim 1-5, it is characterized in that: the network management interface design at radio-frequency light transmission module has proposed standard RS232 transceiving chip IC1 and RS485 transceiving chip U14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200959306U CN2798424Y (en) | 2005-04-14 | 2005-04-14 | Intelligent radio frequency optical transmission module with integrated power amplifying and low noise amplifying |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200959306U CN2798424Y (en) | 2005-04-14 | 2005-04-14 | Intelligent radio frequency optical transmission module with integrated power amplifying and low noise amplifying |
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| CN2798424Y true CN2798424Y (en) | 2006-07-19 |
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| CNU2005200959306U Expired - Lifetime CN2798424Y (en) | 2005-04-14 | 2005-04-14 | Intelligent radio frequency optical transmission module with integrated power amplifying and low noise amplifying |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951293A (en) * | 2010-09-07 | 2011-01-19 | 东莞市铭普实业有限公司 | Ultrahigh frequency band optical power automatic compensation radio frequency intelligent light transmission module |
| CN101599790B (en) * | 2009-01-08 | 2013-05-08 | 武汉盛华微系统技术股份有限公司 | Intelligent micropower optical fiber wireless covering system |
| CN104393929A (en) * | 2014-12-02 | 2015-03-04 | 苏州市欧博锐自动化科技有限公司 | Optical transmitter based on unit gain second-order high-pass filter circuit |
| CN104410461A (en) * | 2014-12-02 | 2015-03-11 | 苏州市欧博锐自动化科技有限公司 | Optical transmitter based on normalizing filtering circuit |
| CN104410460A (en) * | 2014-12-02 | 2015-03-11 | 苏州市欧博锐自动化科技有限公司 | Optical transmitter based on first-order bypass filter circuit |
-
2005
- 2005-04-14 CN CNU2005200959306U patent/CN2798424Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599790B (en) * | 2009-01-08 | 2013-05-08 | 武汉盛华微系统技术股份有限公司 | Intelligent micropower optical fiber wireless covering system |
| CN101951293A (en) * | 2010-09-07 | 2011-01-19 | 东莞市铭普实业有限公司 | Ultrahigh frequency band optical power automatic compensation radio frequency intelligent light transmission module |
| CN104393929A (en) * | 2014-12-02 | 2015-03-04 | 苏州市欧博锐自动化科技有限公司 | Optical transmitter based on unit gain second-order high-pass filter circuit |
| CN104410461A (en) * | 2014-12-02 | 2015-03-11 | 苏州市欧博锐自动化科技有限公司 | Optical transmitter based on normalizing filtering circuit |
| CN104410460A (en) * | 2014-12-02 | 2015-03-11 | 苏州市欧博锐自动化科技有限公司 | Optical transmitter based on first-order bypass filter circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150414 Granted publication date: 20060719 |