CN202424726U - Multi-system RF light transmission module - Google Patents
Multi-system RF light transmission module Download PDFInfo
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- CN202424726U CN202424726U CN2011205303549U CN201120530354U CN202424726U CN 202424726 U CN202424726 U CN 202424726U CN 2011205303549 U CN2011205303549 U CN 2011205303549U CN 201120530354 U CN201120530354 U CN 201120530354U CN 202424726 U CN202424726 U CN 202424726U
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Abstract
The utility model relates to a multi-system RF (Radio Frequency) light transmission module, which integrates the GSM (Global System for Mobile Communications) band, the DCS (Digital Cellular System) band and the WCDMA (Wideband Code Division Multiple Access) band, so that the light transmission module can serve the functions of three modules and the modular integration level is improved. An RF optical module integrating three systems enables a multi-system analog optical-fiber repeater to dispense with a plurality of optical modules, so that the structure and the assembly of the multi-system optical fiber repeater are fundamentally simplified, and a new high-integration era of the multi-system analog optical-fiber repeater is initiated. The multi-system RF light transmission module has the functions of automatic input power control, gain adjustment, FSK (Frequency Shift Keying) communication, temperature detection and the like. GSM-band, DCS-band and WCDMA-band communications are realized in one optical module, so that high integration level is realized, the size of the multi-system analog optical-fiber repeater is effectively reduced, the assembly of the repeater is simplified and the multi-system analog optical-fiber repeater is easy for centralized maintenance and management.
Description
Technical field
The utility model belongs to the radio frequency communication devices field, is specifically related to the radio-frequency light transmission module of a kind of integrated GSM frequency range, DCS frequency range, three standards of WCDMA frequency range.
Background technology
Current whole communications field 2G/3G GSM long-term co-existence, the covering of the network optimization equipment of multi-modulation scheme are each big operator main problems of considering in the future communications networking.Each big operator has adopted the repeater to be optimized in the network coverage widely; The covering requirement can not be satisfied in some zone in the repeater of single system; And cover problem such as face the cost height, volume is big, efficient is low and engineering opening is loaded down with trivial details with the repeaters of many cover single systems; The repeater of multi-modulation scheme then can use a cover repeater to accomplish the network coverage of a plurality of standards, has very strong practicality.Radio-frequency light transmission module is the nucleus module on the analog optical fiber repeater, because existing light delivery module all is a single system, so must use a plurality of single system light delivery modules in the multi-modulation scheme analog optical fiber repeater.
Summary of the invention
The purpose of the utility model is in order to reduce the quantity of the radio-frequency light transmission module in the multi-modulation scheme analog optical fiber repeater; Reduce the structure and the installation of the cost of multi-modulation scheme analog optical fiber repeater, the integrated level that improves multi-modulation scheme analog optical fiber repeater, simplification multi-modulation scheme analog optical fiber repeater, the radio-frequency light transmission module that provides a kind of integrated GSM frequency range, DCS frequency range and WCDMA frequency range to communicate by letter.The radio frequency transmission unit of GSM frequency range, DCS frequency range and three standards of WCDMA frequency range is integrated in the middle of the optical module, improves the integrated level of optical module.
For realizing above purpose, the technical scheme that the utility model is taked is following:
The multi-modulation scheme radio-frequency light transmission module; The link of three standards of GSM frequency range, DCS frequency range, WCDMA frequency range is integrated in original radio frequency optical module; Signal through three standards of Optical Fiber Transmission is characterized in that: this radio frequency optical module comprises GSM radio frequency transmission unit, DCS radio frequency transmission unit, WCDMA radio frequency transmission unit, radio frequency/optical conversion element, light/radiofrequency signal converting unit, mixer, splitter, control unit, FSK communication unit; The output of the down link of the output of the down link of the output of the down link of GSM radio frequency transmission unit, DCS radio frequency transmission unit, WCDMA radio frequency transmission unit links to each other with the input port of mixer respectively; The delivery outlet of mixer links to each other with radio frequency/optical conversion element input; Radio frequency/optical conversion element output is through optical fiber output signal; The input of light/radiofrequency signal converting unit is through the optical fiber input signal; Light/radiofrequency signal converting unit output links to each other with the input of splitter through a filter; The output of splitter links to each other with the input of the up link of the input of the up link of the input of the up link of GSM radio frequency transmission unit, DCS radio frequency transmission unit, WCDMA radio frequency transmission unit respectively; Control unit is controlled the radio frequency attenuator of GSM radio frequency transmission unit, DCS radio frequency transmission unit, WCDMA radio frequency transmission unit respectively, control unit control FSK communication unit.Sampled voltage from above-mentioned radio frequency/optical signal conversion unit, light/radiofrequency signal converting unit and radio frequency transmission unit; Single-chip microcomputer through control unit is handled; Adjusting light/penetrate the luminous power size and the radio-frequency power decay of signal conversion unit, with the luminous power and the radio frequency power output of control radio-frequency light transmission module; GSM radio frequency transmission unit, DCS radio frequency transmission unit and WCDMA radio frequency transmission unit carry out the transmission of radiofrequency signal respectively; In the down link, mixer closes the road with GSM band transmissions unit, DCS band transmissions unit and WCDMA band transmissions, gets into radio frequency/optical signal conversion unit again, converts light signal into, transmits through optical fiber; In the up link, the radiofrequency signal in the optical fiber converts the signal of telecommunication to through light/radiofrequency signal converting unit, and through splitter, GSM frequency range radiofrequency signal, DCS frequency range radiofrequency signal, WCDMA frequency range radiofrequency signal get into separately and transmit respectively in the passage.Mixer closes the road with descending GSM radiofrequency signal, DCS radiofrequency signal, WCDMA radiofrequency signal, closes signal behind the road and gets into laser modulation and become light signal in optical fiber, to transmit; Splitter separates the GSM radiofrequency signal in up, DCS radiofrequency signal, WCDMA radiofrequency signal, and isolated signal gets into separately in oneself the radio frequency link and transmits, through up RF output end mouth output.
Described control unit comprises single-chip microcomputer, 485 communication units, ALC control unit; Single-chip microcomputer links to each other with 485 communication units, ALC control unit respectively, and the ALC control unit links to each other with the radio frequency attenuator of each GSM radio frequency transmission unit, DCS radio frequency transmission unit and WCDMA radio frequency transmission unit respectively; Control unit is monitored the ALC control unit through single-chip microcomputer, accomplishes the control to radio-frequency power; 485 communication units through 485 transceiving chips accomplish with single-chip microcomputer between communicate by letter.
Described GSM radio frequency transmission unit comprises: the up first order amplification of the descending amplifying circuit of the descending input coupling of GSM frequency range, the downlink radio frequency attenuator of GSM frequency range, GSM frequency range, radio-frequency power detecting unit, GSM frequency range, the up radio frequency attenuator of GSM frequency range, the up second level amplifying circuit of GSM frequency range, the up output impedance coupling of GSM frequency range; In the down link; The base station signal of GSM frequency range gets into the descending input coupling of GSM frequency range through GSM downlink radio frequency port; The descending input coupling of the GSM frequency range back entering mixer that links to each other with the descending amplifying circuit of the downlink radio frequency attenuator of GSM frequency range and GSM frequency range successively; The radio-frequency power detecting unit is connected the descending input coupling output of GSM frequency range, and the radio-frequency power detecting unit links to each other with the single-chip microcomputer of control unit; In the up link; The GSM radiofrequency signal that obtains from splitter gets into the up first order of GSM frequency range amplifies, and the up first order of GSM frequency range is amplified successively the back that links to each other with the up output impedance coupling of the up second level amplifying circuit of the up radio frequency attenuator of GSM frequency range, GSM frequency range, GSM frequency range and exported the GSM radiofrequency signal; The base station signal of GSM frequency range gets into the descending input coupling light delivery module of GSM frequency range through GSM downlink radio frequency port, after overmatching, decay, amplification, closes the road; In the up link, mate laggard line output through amplification, decay, amplification, output from the GSM radiofrequency signal that splitter obtains.
Described DCS radio frequency transmission unit comprises: the up first order of the descending amplifying circuit of the descending input coupling of DCS frequency range, the downlink radio frequency attenuator of DCS frequency range, DCS frequency range, radio-frequency power detecting unit, DCS frequency range is amplified, the up output impedance coupling of the up second level amplifying circuit of the up radio frequency attenuator of DCS frequency range, DCS frequency range, DCS frequency range; The base station signal of DCS frequency range gets into the descending input coupling of DCS frequency range through DCS downlink radio frequency port; The descending input coupling of the DCS frequency range back entering mixer that links to each other with the descending amplifying circuit of the downlink radio frequency attenuator of DCS frequency range and DCS frequency range successively; The radio-frequency power detecting unit is connected the descending input coupling output of DCS frequency range, and the radio-frequency power detecting unit links to each other with the single-chip microcomputer of control unit; In the up link; The DCS radiofrequency signal that obtains from splitter gets into the up first order of DCS frequency range amplifies, and the up first order of DCS frequency range is amplified successively the back that links to each other with the up output impedance coupling of the up second level amplifying circuit of the up radio frequency attenuator of DCS frequency range, DCS frequency range, DCS frequency range and exported the DCS radiofrequency signal; In the down link, the base station signal of DCS frequency range gets into light delivery module through DCS downlink radio frequency port, after overmatching, decay, amplification, closes the road; In the up link, mate laggard line output through amplification, decay, amplification, output from the DCS radiofrequency signal that splitter obtains.
Described WCDMA radio frequency transmission unit comprises: the up first order of the descending amplifying circuit of the descending input coupling of WCDMA frequency range, the downlink radio frequency attenuator of WCDMA frequency range, WCDMA frequency range, radio-frequency power detecting unit, WCDMA frequency range is amplified, the up output impedance coupling of the up second level amplifying circuit of the up radio frequency attenuator of WCDMA frequency range, WCDMA frequency range, WCDMA frequency range; The base station signal of WCDMA frequency range gets into the descending input coupling of WCDMA frequency range through WCDMA downlink radio frequency port; The descending input coupling of the WCDMA frequency range back entering mixer that links to each other with the descending amplifying circuit of the downlink radio frequency attenuator of WCDMAM frequency range and WCDMA frequency range successively; The radio-frequency power detecting unit is connected the descending input coupling output of WCDMA frequency range, and the radio-frequency power detecting unit links to each other with the single-chip microcomputer of control unit; In the up link; The WCDMA radiofrequency signal that obtains from splitter gets into the up first order of WCDMA frequency range amplifies, and the up first order of WCDMA frequency range is amplified successively the back that links to each other with the up output impedance coupling of the up second level amplifying circuit of the up radio frequency attenuator of WCDMA frequency range, WCDMA frequency range, WCDMA frequency range and exported the WCDMA radiofrequency signal; In the down link, the base station signal of WCDMA frequency range gets into light delivery module through WCDMA downlink radio frequency port, after overmatching, decay, amplification, closes the road; In the up link, mate laggard line output through amplification, decay, amplification, output from the WCDMA radiofrequency signal that splitter obtains.
Described radio frequency/optical conversion element comprises laser, luminous power collecting unit, luminous power control unit; The laser input links to each other with the output of mixer; Connect a luminous power collecting unit at laser output; And the luminous power collecting unit links to each other with the single-chip microcomputer of control unit; Laser connect a luminous power control unit on the laser, and the luminous power control unit links to each other with the single-chip microcomputer of control unit through optical fiber output.Laser converts radiofrequency signal to light signal and transmits, and the single-chip microcomputer of control unit is issued in the luminous power collection that laser is current of luminous power collecting unit well, and single-chip microcomputer is controlled the luminous power of laser through the luminous power control unit.
Described light/radiofrequency signal converting unit comprises luminous power collecting unit, detector; Detector links to each other with laser output through optical fiber, and the luminous power collecting unit is connected the input of detector, and the luminous power collecting unit links to each other with the single-chip microcomputer of control unit.Convert the light signal in the optical fiber into radiofrequency signal through detector, on radio frequency link, transmit, the luminous power collecting unit is gathered current luminous power size.
Described FSK communication unit comprises: the low pass filter of the low pass filter of FSK modulator, down link, fsk demodulator, up link; The single-chip microcomputer of control unit links to each other with fsk demodulator with the FSK modulator respectively; The FSK modulator is connected to the output of mixer through the low pass filter of down link; Fsk demodulator is connected to the output of detector through the low pass filter of up link; The monitor data that the single-chip microcomputer of control unit sends is modulated through the FSK modulator, through the low pass filter filtering of down link, sends into laser and converts the light signal transmission to; The fsk signal that detector receives is sent into and is carried out demodulation in the fsk demodulator through the low pass filter filtering of up link, after the demodulation monitor data is issued the single-chip microcomputer of control unit.
The advantage of the utility model is following: the utlity model has the input power functions such as adjustment, FSK communication, temperature detection of controlling automatically, gain.The utility model is realized the communication of GSM frequency range, DCS frequency range, WCDMA frequency range in an optical module; Has high integrationization; Can effectively reduce the volume of multi-modulation scheme analog optical fiber repeater, simplify the assembling of repeater, make multi-modulation scheme analog optical fiber repeater be easy to centralized maintenance and management.
Description of drawings
Fig. 1 is the theory diagram of the utility model.
Fig. 2 is a kind of block diagram of the multi-modulation scheme analog optical fiber repeater near-end based on single system radio frequency optical module.
Fig. 3 is a kind of block diagram of the multi-modulation scheme analog optical fiber repeater near-end based on the utility model.
Embodiment
In conjunction with accompanying drawing the utility model is done further to describe.
Below in conjunction with accompanying drawing the utility model is further specified.
Because GSM frequency range, DCS frequency range, WCDMA frequency band signals finally all are in an optical fiber, to transmit, therefore, the signal of three standards unavoidably will close road and shunt.For avoiding the interference of signal between each standard, must select for use mixer and splitter with high-isolation.Mixer 10 is the medium multiplexer with splitter 11 among Fig. 1, and the isolation of each frequency range has more than the 60dBc.
After descending three standard signals mate (1,4,7), radio frequency attenuator (2,5,8), amplification (3,6,9) through input separately respectively; After closing the road by mixer 11, on a radio frequency link, transmit, if through active device; To produce second order intermodulation and frequency-doubled signal; Part second order intermodulation and frequency-doubled signal can drop in other communications band, become spuiously, and communication produce is disturbed.The second order intermodulation 930MHz that produces of 1870MHz and 940MHz for example, in the band downlink that drops on GSM, the two frequency multiplication signal 1860MHz of 930MHz can drop in the band downlink of DCS.For avoiding second order intermodulation and frequency multiplication to worsen, close active device devices such as can not placing amplifier on the link after the road again, second order intermodulation and frequency multiplication only produce in laser, can guarantee interior spuious less of each frequency range like this.
The input port of the down link of three standards all has the radio-frequency power detecting unit, provides input power to detect, and single-chip microcomputer obtains the size back of input power and through the ALC control unit radio frequency attenuator controlled, and makes input power constant.
FSK signal of communication radiofrequency signal with three standards after low pass filter 12 filtering high fdrequency components is carried out radio frequency/light signal conversion through laser; Transmit in optical fiber the conversion back; Single-chip microcomputer obtains current luminous power size through the luminous power collecting unit; And then through the luminous power control unit luminous power is adjusted, can the luminous power of laser be provided with within the specific limits, and satisfy the requirement of luminous power in the whole operating temperature range.
In the up link, single-chip microcomputer is gathered the size of luminous power through luminous power collecting unit 33.Light signal in the optical fiber carries out light/radiofrequency signal conversion through detector 16; Obtain the radiofrequency signal and the FSK signal of communication of three standards after converting; Low pass filter 31 is used for the radiofrequency signal of three standards of filtering; Obtain fsk signal entering FSK communication chip and carry out demodulation, the monitor data after the demodulation is passed to single-chip microcomputer.Filter 17 is used for filtering FSK signal of communication, and the radiofrequency signal of three standards gets in the link separately after splitter 18 shunt to be transmitted.
The GSM upward signal amplifies 21 through first order amplification 19, radio frequency attenuator 20, the second level, exports to the base station after the output impedance coupling 22.The DCS upward signal amplifies 25 through first order amplification 23, radio frequency attenuator 24, the second level, exports to the base station after the output impedance coupling 26.The GSM upward signal amplifies 29 through first order amplification 27, radio frequency attenuator 28, the second level, exports to the base station after the output impedance coupling 30.Radio frequency attenuator on every link is used for regulating separately the gain of each link.
Fig. 2 and Fig. 3 are respectively the near-end block diagrams of two kinds of multi-modulation scheme analog optical fiber repeaters.Fig. 2 need adopt the radio-frequency light transmission module of three single systems, and installation and maintenance is all more loaded down with trivial details, and Fig. 3 adopts multi-modulation scheme integrated RF light delivery module, and a module realizes the function of three modules in the past, and is simple and practical.
Above-described embodiment; Purpose, technical scheme and beneficial effect to the utility model have carried out further explain, it should be understood that the above is merely the embodiment of the utility model; And be used to limit the protection range of the utility model for a short time; All within the spirit and principle of the utility model, any modification of being made, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (8)
1. multi-modulation scheme radio-frequency light transmission module; The link of three standards of GSM frequency range, DCS frequency range, WCDMA frequency range is integrated in original radio frequency optical module; Signal through three standards of Optical Fiber Transmission is characterized in that: this radio frequency optical module comprises GSM radio frequency transmission unit, DCS radio frequency transmission unit, WCDMA radio frequency transmission unit, radio frequency/optical conversion element, light/radiofrequency signal converting unit, mixer, splitter, control unit, FSK communication unit; The output of the down link of the output of the down link of the output of the down link of GSM radio frequency transmission unit, DCS radio frequency transmission unit, WCDMA radio frequency transmission unit links to each other with the input port of mixer respectively; The delivery outlet of mixer links to each other with radio frequency/optical conversion element input; Radio frequency/optical conversion element output is through optical fiber output signal; The input of light/radiofrequency signal converting unit is through the optical fiber input signal; Light/radiofrequency signal converting unit output links to each other with the input of splitter through a filter; The output of splitter links to each other with the input of the up link of the input of the up link of the input of the up link of GSM radio frequency transmission unit, DCS radio frequency transmission unit, WCDMA radio frequency transmission unit respectively; Control unit is controlled the radio frequency attenuator of GSM radio frequency transmission unit, DCS radio frequency transmission unit, WCDMA radio frequency transmission unit respectively, control unit control FSK communication unit.
2. multi-modulation scheme radio-frequency light transmission module according to claim 1; It is characterized in that: described control unit comprises: single-chip microcomputer (36), 485 communication units (34), ALC control unit (35); Single-chip microcomputer (36) links to each other with 485 communication units (34), ALC control unit (35) respectively, and ALC control unit (35) links to each other with the radio frequency attenuator of each GSM radio frequency transmission unit, DCS radio frequency transmission unit and WCDMA radio frequency transmission unit respectively.
3. multi-modulation scheme radio-frequency light transmission module according to claim 1 is characterized in that: described GSM radio frequency transmission unit comprises: the up first order of the descending amplifying circuit (3) of the descending input coupling (1) of GSM frequency range, the downlink radio frequency attenuator (2) of GSM frequency range, GSM frequency range, radio-frequency power detecting unit, GSM frequency range is amplified the up second level amplifying circuit (21) of the up radio frequency attenuator (20) of (19), GSM frequency range, GSM frequency range, the up output impedance coupling (22) of GSM frequency range; In the down link; The base station signal of GSM frequency range gets into the descending input coupling (1) of GSM frequency range through GSM downlink radio frequency port; The descending input coupling (1) of the GSM frequency range back entering mixer that links to each other with the descending amplifying circuit (3) of the downlink radio frequency attenuator (2) of GSM frequency range and GSM frequency range successively; The radio-frequency power detecting unit is connected descending input coupling (1) output of GSM frequency range, and the radio-frequency power detecting unit links to each other with the single-chip microcomputer of control unit; In the up link; The GSM radiofrequency signal that obtains from splitter gets into the up first order of GSM frequency range and amplifies (19), and the up first order of GSM frequency range is amplified (19) back that links to each other with the up output impedance coupling (22) of the up second level amplifying circuit (21) of the up radio frequency attenuator (20) of GSM frequency range, GSM frequency range, GSM frequency range successively and exported the GSM radiofrequency signal.
4. multi-modulation scheme radio-frequency light transmission module according to claim 1; It is characterized in that: described DCS radio frequency transmission unit comprises: the up first order of the descending amplifying circuit (6) of the descending input coupling (4) of DCS frequency range, the downlink radio frequency attenuator (5) of DCS frequency range, DCS frequency range, radio-frequency power detecting unit, DCS frequency range is amplified (23), the up output impedance coupling (26) of the up radio frequency attenuator (24) of DCS frequency range, the up second level amplifying circuit (25) of DCS frequency range, DCS frequency range; The base station signal of DCS frequency range gets into the descending input coupling (4) of DCS frequency range through DCS downlink radio frequency port; The descending input coupling (4) of the DCS frequency range back entering mixer that links to each other with the descending amplifying circuit (6) of the downlink radio frequency attenuator (5) of DCS frequency range and DCS frequency range successively; The radio-frequency power detecting unit is connected descending input coupling (4) output of DCS frequency range, and the radio-frequency power detecting unit links to each other with the single-chip microcomputer of control unit; In the up link; The DCS radiofrequency signal that obtains from splitter gets into the up first order of DCS frequency range and amplifies (23), and the up first order of DCS frequency range is amplified (23) back that links to each other with the up output impedance coupling (26) of the up second level amplifying circuit (25) of the up radio frequency attenuator (24) of DCS frequency range, DCS frequency range, DCS frequency range successively and exported the DCS radiofrequency signal.
5. multi-modulation scheme radio-frequency light transmission module according to claim 1; It is characterized in that: described WCDMA radio frequency transmission unit comprises: the up first order of the descending amplifying circuit (9) of the descending input coupling (7) of WCDMA frequency range, the downlink radio frequency attenuator (8) of WCDMA frequency range, WCDMA frequency range, radio-frequency power detecting unit, WCDMA frequency range is amplified (27), the up output impedance coupling (30) of the up radio frequency attenuator (28) of WCDMA frequency range, the up second level amplifying circuit (29) of WCDMA frequency range, WCDMA frequency range; The base station signal of WCDMA frequency range gets into the descending input coupling (7) of WCDMA frequency range through WCDMA downlink radio frequency port; The descending input coupling (7) of the WCDMA frequency range back entering mixer that links to each other with the descending amplifying circuit (9) of the downlink radio frequency attenuator (8) of WCDMAM frequency range and WCDMA frequency range successively; The radio-frequency power detecting unit is connected descending input coupling (7) output of WCDMA frequency range, and the radio-frequency power detecting unit links to each other with the single-chip microcomputer of control unit; In the up link; The WCDMA radiofrequency signal that obtains from splitter gets into the up first order of WCDMA frequency range and amplifies (27), and the up first order of WCDMA frequency range is amplified (27) back that links to each other with the up output impedance coupling (30) of the up second level amplifying circuit (29) of the up radio frequency attenuator (28) of WCDMA frequency range, WCDMA frequency range, WCDMA frequency range successively and exported the WCDMA radiofrequency signal.
6. multi-modulation scheme radio-frequency light transmission module according to claim 1 is characterized in that: described radio frequency/optical conversion element comprises laser (11), luminous power collecting unit (14), luminous power control unit (15); The laser input links to each other with the output of mixer; Connect a luminous power collecting unit (14) at laser output; And luminous power collecting unit (14) links to each other with the single-chip microcomputer of control unit; Laser connect a luminous power control unit (15) on the laser, and luminous power control unit (15) links to each other with the single-chip microcomputer of control unit through optical fiber output.
7. multi-modulation scheme radio-frequency light transmission module according to claim 1 is characterized in that: described light/radiofrequency signal converting unit comprises luminous power collecting unit (33), detector (16); Detector (16) links to each other with laser output through optical fiber, and luminous power collecting unit (33) is connected the input of detector, and luminous power collecting unit (33) links to each other with the single-chip microcomputer of control unit.
8. multi-modulation scheme radio-frequency light transmission module according to claim 1 is characterized in that: described FSK communication unit comprises: the low pass filter (31) of the low pass filter (12) of FSK modulator (13), down link, fsk demodulator (32), up link; The single-chip microcomputer of control unit links to each other with fsk demodulator (32) with FSK modulator (13) respectively; FSK modulator (13) is connected to the output of mixer through the low pass filter (12) of down link, and fsk demodulator (32) is connected to the output of detector through the low pass filter (31) of up link.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205303549U CN202424726U (en) | 2011-12-16 | 2011-12-16 | Multi-system RF light transmission module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011205303549U CN202424726U (en) | 2011-12-16 | 2011-12-16 | Multi-system RF light transmission module |
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| CN202424726U true CN202424726U (en) | 2012-09-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450307A (en) * | 2015-12-11 | 2016-03-30 | 宁波环球广电科技有限公司 | Radio frequency amplification circuit and optical receiver for optical fiber radio frequency communication network |
| CN112751622A (en) * | 2020-12-29 | 2021-05-04 | 北京航天时代光电科技有限公司 | Multifunctional S-band photoelectric transceiving system and method |
-
2011
- 2011-12-16 CN CN2011205303549U patent/CN202424726U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450307A (en) * | 2015-12-11 | 2016-03-30 | 宁波环球广电科技有限公司 | Radio frequency amplification circuit and optical receiver for optical fiber radio frequency communication network |
| CN112751622A (en) * | 2020-12-29 | 2021-05-04 | 北京航天时代光电科技有限公司 | Multifunctional S-band photoelectric transceiving system and method |
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Address after: 430205 Hubei city of Wuhan province Jiangxia Hidden Dragon Island Tan lake two Road No. 1 Patentee after: CITIC Mobile Communication Technology Co., Ltd Address before: 430074 Wuhan, Hongshan Province District Road, Department of mail, No. 88 hospital Patentee before: Wuhan Hongxin Telecommunication Technologies Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee after: CITIC Mobile Communication Technology Co.,Ltd. Address before: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee before: CITIC Mobile Communication Technology Co., Ltd |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120905 |