CN111884723B - Photoelectric radio frequency feeder line assembly applied to uplink communication link - Google Patents
Photoelectric radio frequency feeder line assembly applied to uplink communication link Download PDFInfo
- Publication number
- CN111884723B CN111884723B CN202010722594.2A CN202010722594A CN111884723B CN 111884723 B CN111884723 B CN 111884723B CN 202010722594 A CN202010722594 A CN 202010722594A CN 111884723 B CN111884723 B CN 111884723B
- Authority
- CN
- China
- Prior art keywords
- radio frequency
- power supply
- clock
- input
- processing unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004891 communication Methods 0.000 title claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims abstract description 79
- 238000012545 processing Methods 0.000 claims abstract description 78
- 230000005693 optoelectronics Effects 0.000 claims abstract description 5
- 239000013307 optical fiber Substances 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 5
- 238000006467 substitution reaction Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 16
- 238000002955 isolation Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000003780 insertion Methods 0.000 description 8
- 230000037431 insertion Effects 0.000 description 8
- 238000001914 filtration Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 238000011065 in-situ storage Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/002—Casings with localised screening
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses an optoelectronic radio frequency feeder line assembly applied to an uplink communication link, which consists of a front end assembly, a rear end assembly and an optical cable. The front-end assembly comprises a front-end shielding box, a front-end power supply unit, a front-end tubular wavelength division multiplexer and a front-end photoelectric radio frequency processing unit, wherein the front-end power supply unit, the front-end tubular wavelength division multiplexer and the front-end photoelectric radio frequency processing unit are arranged in the front-end shielding box. The rear end component comprises a rear end shielding box, a rear end power supply unit, a rear end photoelectric radio frequency processing unit and a rear end tubular wavelength division multiplexer, wherein the rear end power supply unit, the rear end photoelectric radio frequency processing unit and the rear end tubular wavelength division multiplexer are arranged in the rear end shielding box. The front end component and the rear end component are connected through an optical cable. The invention designs a miniaturized plug-and-play assembly which is matched with a photoelectric hybrid radio frequency cable/optical cable to realize the optical fiber substitution of a radio frequency feeder.
Description
Technical Field
The invention relates to the technical field of radio frequency optical communication, in particular to an optoelectronic radio frequency feeder line assembly applied to an uplink communication link.
Background
In the satellite signal uplink communication link of the satellite ground station, a radio frequency feeder is generally arranged between an up-conversion power amplifier (BUC) at the antenna end and clock equipment and modulation equipment at the tower base end, so as to complete transmission of a reference clock (10 MHz) and an intermediate frequency (L/S frequency band), as shown in fig. 1. According to the field requirement, the distribution length of the radio frequency feeder line is different from a few meters to tens of meters, in order to ensure low loss of the high frequency signal in the radio frequency feeder line, a large-diameter radio frequency feeder line with low insertion loss is generally selected, the larger the distribution distance is, the larger the diameter of the radio frequency feeder line is used, and the weight and construction difficulty of the corresponding radio frequency feeder line are obviously improved.
With the development of optical transmission technology, based on the characteristics of low loss, light weight, strong anti-interference capability and the like of optical fibers, optical copper feeding and light receiving have been a necessary trend, and in military and civil radio frequency signal communication, radio frequency optical transmission equipment is generally used for remote signal transmission, for example, antenna signals, radar signals, intermediate frequency signals and time-frequency signals which need to be remotely transmitted in applications such as short wave/ultrashort wave antennas, mobile base stations, satellite ground stations and the like can be remotely transmitted by using the radio frequency optical transmission equipment. But the radio frequency feeder line is used as a composite carrier of signals and energy, and is used for carrying four signals and energy forms of a reference clock, an intermediate frequency, control and feeding, and requires outdoor arrangement, and has extremely high requirements on volume size, reliability and environmental adaptability; the conventional radio frequency optical transmission device prevents the optical fiber of the radio frequency feeder line due to the defects of large volume, inflexible arrangement, inconvenient use, lack of feed transmission capability and the like.
Disclosure of Invention
The invention aims to solve the problem that the traditional radio frequency optical transmission equipment obstructs the optical fiber of a radio frequency feeder line due to the defects of large volume, inflexible arrangement, inconvenient use, lack of feed transmission capacity and the like, and provides an optical-electric radio frequency feeder line assembly applied to an uplink communication link.
In order to solve the problems, the invention is realized by the following technical scheme:
The photoelectric radio frequency feeder line assembly applied to the uplink communication link consists of a front end assembly, a rear end assembly and an optical cable. The front end assembly comprises a front end shielding box, a front end power supply unit, a front end tubular wavelength division multiplexer and a front end photoelectric radio frequency processing unit, wherein the front end power supply unit, the front end tubular wavelength division multiplexer and the front end photoelectric radio frequency processing unit are arranged in the front end shielding box; the front end shielding box is provided with a front end external power input interface, a front end optical interface and a front end hybrid radio frequency interface; the external power supply input end of the front-end power supply unit is connected with the front-end external power supply input interface on the front-end shielding box, and the active power supply output end of the front-end power supply unit is connected with the active power supply input end of the front-end photoelectric radio frequency processing unit; the combined optical port of the front-end tube type wavelength division multiplexer is connected with a front-end optical interface on the front-end shielding box, and the intermediate frequency optical output end and the clock optical output end of the front-end tube type wavelength division multiplexer are respectively connected with the intermediate frequency optical input end and the clock optical input end of the front-end photoelectric radio frequency processing unit; the mixed radio frequency output end of the front-end photoelectric radio frequency processing unit is connected with a front-end mixed radio frequency interface on the front-end shielding box. The rear end component comprises a rear end shielding box, a rear end power supply unit, a rear end photoelectric radio frequency processing unit and a rear end tubular wavelength division multiplexer, wherein the rear end power supply unit, the rear end photoelectric radio frequency processing unit and the rear end tubular wavelength division multiplexer are arranged in the rear end shielding box; the rear end shielding box is provided with a rear end external power input interface, a rear end hybrid radio frequency interface and a rear end optical interface; the external power supply input end of the rear end power supply unit is connected with the rear end external power supply input interface on the rear end shielding box, and the active power supply output end of the rear end power supply unit is connected with the active power supply input end of the rear end photoelectric radio frequency processing unit; the mixed radio frequency input end of the rear-end photoelectric radio frequency processing unit is connected with a rear-end mixed radio frequency interface on the rear-end shielding box, and the intermediate frequency light output end and the clock light output end of the rear-end photoelectric radio frequency processing unit are respectively connected with the intermediate frequency light input end and the clock light input end of the rear-end tubular wavelength division multiplexer; the combined optical port of the rear-end tube type wavelength division multiplexer is connected with a rear-end optical interface on the rear-end shielding box. The rear end optical interface on the rear end shielding box is connected with the front end optical interface on the front end shielding box through an optical cable.
In the scheme, the front-end photoelectric radio frequency processing unit comprises a front-end intermediate frequency coaxial detector, a front-end intermediate frequency low-noise amplifier, a front-end high-pass filter, a front-end clock coaxial detector, a front-end clock AGC amplifier, a front-end low-pass filter and a front-end combiner. The input end of the front-end intermediate frequency coaxial detector forms an intermediate frequency light input end of the front-end photoelectric radio frequency processing unit; the output end of the front-end intermediate frequency coaxial detector is connected with the input end of the front-end high-pass filter through the front-end intermediate frequency low-noise amplifier, and the output end of the front-end high-pass filter is connected with the intermediate frequency input end of the front-end combiner; the input end of the front-end clock coaxial detector forms a clock light input end of the front-end photoelectric radio frequency processing unit; the output end of the front-end clock coaxial detector is connected with the input end of the front-end low-pass filter through the front-end clock AGC amplifier, and the output end of the front-end low-pass filter is connected with the clock input end of the front-end combiner; the output end of the front-end combiner forms a mixed radio frequency output end of the front-end photoelectric radio frequency processing unit; the power supply ends of the front-end intermediate frequency coaxial detector, the front-end intermediate frequency low-noise amplifier, the front-end clock coaxial detector and the front-end clock AGC amplifier form an active power supply input end of the front-end photoelectric radio frequency processing unit.
In the scheme, the rear-end photoelectric radio frequency processing unit comprises a rear-end power divider, a rear-end high-pass filter, a rear-end intermediate frequency low-noise amplifier, a rear-end intermediate frequency coaxial laser, a rear-end intermediate frequency light-operated circuit, a rear-end low-pass filter, a rear-end clock low-noise amplifier, a rear-end clock coaxial laser and a rear-end clock light-operated circuit. The input end of the rear-end power divider forms a mixed radio frequency input end of the rear-end photoelectric radio frequency processing unit; the intermediate frequency output end of the rear end power divider is connected with the input end of the rear end intermediate frequency low noise amplifier through the rear end high pass filter, the output end of the rear end intermediate frequency low noise amplifier is connected with the input end of the rear end intermediate frequency coaxial laser, and the output end of the rear end intermediate frequency coaxial laser forms an intermediate frequency light output end of the rear end photoelectric radio frequency processing unit; the output end of the rear-end intermediate-frequency light control circuit is connected with the control end of the rear-end intermediate-frequency coaxial laser; the clock output end of the rear-end power divider is connected with the input end of the rear-end clock low-noise amplifier through the rear-end low-pass filter, the output end of the rear-end low-noise amplifier is connected with the input end of the rear-end clock coaxial laser, and the output end of the rear-end clock coaxial laser forms the clock output end of the rear-end photoelectric radio frequency processing unit; the output end of the back-end clock light control circuit is connected with the control end of the back-end clock coaxial laser; the power supply ends of the rear-end intermediate frequency low-noise amplifier, the rear-end intermediate frequency coaxial laser, the rear-end intermediate frequency light-operated circuit, the rear-end clock low-noise amplifier, the rear-end clock coaxial laser and the rear-end clock light-operated circuit form an active power supply input end of the rear-end photoelectric radio frequency processing unit.
In the above scheme, the front-end power supply unit comprises a front-end direct current filter and a front-end DC/DC power supply module. The input end of the front-end direct current filter forms an external power supply input end of the front-end power supply unit; the output end of the front-end direct current filter is connected with the input end of the front-end DC/DC power supply module; the output of the front-end DC/DC power module forms the active power supply output of the front-end power unit.
In the above scheme, the back-end power supply unit comprises a back-end direct current filter and a back-end DC/DC power supply module. The input end of the back-end direct current filter forms an external power supply input end of the back-end power supply unit; the output end of the back-end direct current filter is connected with the input end of the back-end DC/DC power supply module; the output of the back-end DC/DC power module forms the active power supply output of the back-end power unit.
In the scheme, the front end shielding box and the rear end shielding box are double-layer cavity shielding boxes. The front-end photoelectric radio frequency processing unit is positioned on the upper layer of the front-end shielding box, and the front-end tubular wavelength division multiplexer and the front-end power supply unit are positioned on the lower layer of the front-end shielding box. The rear-end photoelectric radio frequency processing unit is positioned on the upper layer of the rear-end shielding box, and the rear-end tubular wavelength division multiplexer and the rear-end power supply unit are positioned on the lower layer of the rear-end shielding box.
In the scheme, the front-end mixed radio frequency interface and the rear-end mixed radio frequency interface are both N-J connectors; the front-end optical interface and the rear-end optical interface are both photoelectric aerospace sockets; the front external power input interface and the rear external power input interface are both SMA-K type or F-K type connectors.
Compared with the prior art, the invention has the following characteristics:
1. The in-situ substitution can be realized: on the basis of not adding or not adding a configuration and not changing the original system scheme, the original radio frequency feeder interface is inherited, and the radio frequency feeder of the antenna can be replaced in situ.
2. Can realize quick laying: the device has small volume and light weight, upgrades the original thick, heavy and hard radio frequency feeder line into a thin, light and soft single-core optical cable, greatly improves the arrangement efficiency and reduces the construction difficulty.
3. The feeder lightning protection can be realized: on the basis of using external feed for the antenna end assembly, the electric isolation between the antenna end and the tower base end can be realized, and the damage of long-radio-frequency feeder line induced lightning to electronic equipment is effectively avoided.
4. The intermediate frequency and clock optical transmitter and receiver can be replaced: the remote optical transmission function of intermediate frequency and clock signals is integrated, when an external power supply is used, clock equipment and intermediate frequency receiving and transmitting equipment can be remotely placed in a central base room, so that the synchronization of reference clocks of all antennas is realized, and the clock and intermediate frequency optical transceiver originally placed in a tower base are directly replaced.
5. The quick maintenance can be realized: by using an active and passive part separated design and relying on the connection of an aerospace photoelectric connector, the maintenance can be completed only by replacing corresponding assembly parts when a single part is damaged, and the whole feeder assembly does not need to be replaced.
Drawings
Fig. 1 is a schematic diagram of a radio frequency feeder application in an uplink communication link.
Fig. 2 is a schematic diagram of an internal structure of an optical-electrical radio frequency feeder assembly applied to an uplink communication link.
Fig. 3 is a schematic diagram of the internal principle of an optical-electrical radio frequency feeder assembly applied in an uplink communication link.
Detailed Description
The invention will be further described in detail below with reference to specific examples and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the invention more apparent. In the examples, directional terms such as "upper", "lower", "middle", "left", "right", "front", "rear", and the like are merely directions with reference to the drawings. Accordingly, the directions of use are merely illustrative and not intended to limit the scope of the invention.
An optoelectronic radio frequency feeder line component applied to an uplink communication link mainly comprises a rear end component, a front end component and an optical cable. The rear end component is arranged at the tower base end or the central machine room, the front end component is arranged at the antenna end, and the rear end component and the front end component are connected by an optical cable. The photoelectric radio frequency feeder line component applied to the uplink communication link mainly completes transmission of L-band intermediate frequency signals (actually covering 500 MHz-2.5 GHz) and 10MHz reference clocks from the tower base end to the antenna end.
Referring to fig. 2, the front-end assembly includes a front-end shield case, and a front-end power supply unit, a front-end pipe wavelength division multiplexer, and a front-end electro-optical radio frequency processing unit disposed within the front-end shield case. The front end shielding box is provided with a front end external power input interface, a front end optical interface and a front end hybrid radio frequency interface. The external power input end of the front-end power supply unit is connected with the front-end external power input interface on the front-end shielding box, and the active power supply output end of the front-end power supply unit is connected with the active power supply input end of the front-end photoelectric radio frequency processing unit. The combined optical port of the front-end tube type wavelength division multiplexer is connected with a front-end optical interface on the front-end shielding box, and the intermediate frequency optical output end and the clock optical output end of the front-end tube type wavelength division multiplexer are respectively connected with the intermediate frequency optical input end and the clock optical input end of the front-end photoelectric radio frequency processing unit. The mixed radio frequency output end of the front-end photoelectric radio frequency processing unit is connected with a front-end mixed radio frequency interface on the front-end shielding box. The rear end component comprises a rear end shielding box, a rear end power supply unit, a rear end photoelectric radio frequency processing unit and a rear end tubular wavelength division multiplexer, wherein the rear end power supply unit, the rear end photoelectric radio frequency processing unit and the rear end tubular wavelength division multiplexer are arranged in the rear end shielding box. The rear end shielding box is provided with a rear end external power input interface, a rear end hybrid radio frequency interface and a rear end optical interface. The external power input end of the rear end power supply unit is connected with the rear end external power input interface on the rear end shielding box, and the active power supply output end of the rear end power supply unit is connected with the active power supply input end of the rear end photoelectric radio frequency processing unit. The mixed radio frequency input end of the rear-end photoelectric radio frequency processing unit is connected with a rear-end mixed radio frequency interface on the rear-end shielding box, and the intermediate frequency optical output end and the clock optical output end of the rear-end photoelectric radio frequency processing unit are respectively connected with the intermediate frequency optical input end and the clock optical input end of the rear-end tubular wavelength division multiplexer. The combined optical port of the rear-end tube type wavelength division multiplexer is connected with a rear-end optical interface on the rear-end shielding box. The rear end optical interface on the rear end shielding box is connected with the front end optical interface on the front end shielding box through an optical cable.
The front end shielding box and the rear end shielding box are double-layer cavity shielding boxes, a double-layer separation type design is adopted in the front end shielding box and the rear end shielding box, wherein the photoelectric radio frequency processing unit is located on the upper layer of the double-layer cavity shielding boxes, the tubular wavelength division multiplexer and the power supply unit are located on the lower layer of the double-layer cavity shielding boxes, and the upper cavity and the lower cavity are all covered by using a parallel seam welding process after debugging. All external interfaces on the front end shielding box and the rear end shielding box are waterproof. The front-end hybrid radio frequency interface and the rear-end hybrid radio frequency interface are both N-J connectors. The front-end optical interface and the back-end optical interface are both photoelectric aerospace sockets. The front external power input interface and the rear external power input interface are both SMA-K type or F-K type connectors.
The internal structure of the front-end assembly includes a front-end power supply unit, a front-end tube wavelength division multiplexer, and a front-end optical-electrical radio frequency processing unit, as shown in fig. 3.
The front-end photoelectric radio frequency processing unit comprises a front-end intermediate frequency coaxial detector, a front-end intermediate frequency low-noise amplifier, a front-end high-pass filter, a front-end clock coaxial detector, a front-end clock AGC amplifier, a front-end low-pass filter and a front-end combiner. The input end of the front-end intermediate frequency coaxial detector forms an intermediate frequency light input end of the front-end photoelectric radio frequency processing unit. The output end of the front-end intermediate frequency coaxial detector is connected with the input end of the front-end high-pass filter through the front-end intermediate frequency low-noise amplifier, and the output end of the front-end high-pass filter is connected with the intermediate frequency input end of the front-end combiner. The input end of the front-end clock coaxial detector forms the clock light input end of the front-end photoelectric radio frequency processing unit. The output end of the front-end clock coaxial detector is connected with the input end of the front-end low-pass filter through the front-end clock AGC amplifier, and the output end of the front-end low-pass filter is connected with the clock input end of the front-end combiner. The output end of the front-end combiner forms a mixed radio frequency output end of the front-end photoelectric radio frequency processing unit. The power supply ends of the front-end intermediate frequency coaxial detector, the front-end intermediate frequency low-noise amplifier, the front-end clock coaxial detector and the front-end clock AGC amplifier form an active power supply input end of the front-end photoelectric radio frequency processing unit. The front-end photoelectric radio frequency processing unit mainly completes photoelectric conversion, amplification and filtering processing of an uplink intermediate frequency signal, completes photoelectric conversion, amplification and filtering processing of an uplink 10MHz reference clock signal, and combines the intermediate frequency signal and the clock signal.
The front-end power supply unit comprises a front-end direct current filter and a front-end DC/DC power supply module. The input of the front-end dc filter forms the external power input of the front-end power supply unit. The output end of the front-end direct current filter is connected with the input end of the front-end DC/DC power supply module. The output of the front-end DC/DC power module forms the active power supply output of the front-end power unit. The front-end power supply unit only supplies power to the current component, the external power supply input interface inputs direct current, the direct current is sent to the direct current filter to filter power interference clutter, the filtered direct current is input to the DC/DC power supply module, the DC/DC power supply module can convert direct current power supply with the input range of 8V-25V into two groups of direct current of +5V and 5V to output to the uplink front-end photoelectric radio frequency processing unit, wherein the +5V maximum load is 200mA, the 5V maximum load is 100mA, the conversion efficiency is calculated according to 70%, and the maximum power consumption of the component is not more than 3W.
The front-end tube type wavelength division multiplexer comprises 1550nm and 1310nm channels, the channel window is lambda + -10 nm (lambda is the central wavelength), the isolation is more than 30dB, and the channel window is wide enough to cover the wavelength drift range (lambda-7.5 nm-lambda+5 nm) of the coaxial laser when the coaxial laser works at high and low temperatures (-50 ℃ to +75 ℃).
The 1550nm intermediate frequency optical signal is separated by the front-end tube type wavelength division multiplexer and then injected into the front-end coaxial intermediate frequency detector, and the working frequency band of the front-end intermediate frequency coaxial detector selected in the embodiment covers 5 MHz-3.5 GHz. After the front-end coaxial intermediate frequency detector performs optical/electrical conversion, the recovered radio frequency signal is output to the front-end intermediate frequency low noise amplifier, the gain of the front-end intermediate frequency low noise amplifier in the frequency range of 500 MHz-3 GHz is larger than 22dB, the noise coefficient is smaller than 3dB, and the output 1dB compression point is larger than 18dBm. The rear stage of the front-end intermediate frequency low noise amplifier is a front-end high-pass filter, and the main function of the front-end intermediate frequency low noise amplifier is to enhance the isolation degree with a reference clock channel. The front-end high-pass filter used in the embodiment has the insertion loss of less than 1dB and the rejection ratio of more than 60dBc at the frequency point of 10MHz at 500 MHz-2.5 GHz. The intermediate frequency signal after filtering is output by the mixed radio frequency interface after passing through the front-end combiner. The intermediate frequency optical transmission link formed by the front end component and the back end component designed in the embodiment has the gain larger than 0dB within the transmission distance within 10 km.
The 10MHz reference clock 1310nm optical signal is split by the front-end tube wavelength division multiplexer and then injected into the front-end clock coaxial detector. The working frequency band of the coaxial detector of the front-end clock is selected to cover 5 MHz-3.5 GHz. After the front-end coaxial clock detector performs optical/electrical conversion, the recovered radio frequency signal is output to the front-end clock AGC amplifier, the maximum gain of the front-end clock AGC amplifier selected by the embodiment is larger than 35dB, the automatic gain adjustment dynamic is larger than 30dB, the stable amplitude output value of the front-end clock AGC amplifier is set to be 10dBm, and the front-end clock AGC amplifier can ensure that clock output power output by the front-end component cannot be fluctuated due to optical path insertion loss change or input power change when different transmission distances are used. The rear stage of the front-end clock AGC amplifier is a front-end low-pass filter which is mainly used for enhancing the isolation degree with an intermediate frequency channel, the 10MHz frequency point insertion loss of the front-end low-pass filter selected in the embodiment is smaller than 1dB, and the 500 MHz-2.5 GHz rejection ratio is larger than 50dBc. The filtered clock signal is output by the radio frequency interface after passing through the front-end combiner. The clock optical transmission link composed of the front end component and the back end component designed in the embodiment can reach 4 dBm-6 dBm in the transmission distance within 10km, and meets the input power requirement of the reference clock of the LNB.
The internal structure of the back-end assembly comprises a back-end power supply unit, a back-end tube type wavelength division multiplexer and a back-end photoelectric radio frequency processing unit, as shown in fig. 3.
The rear-end photoelectric radio frequency processing unit comprises a rear-end power divider, a rear-end high-pass filter, a rear-end intermediate-frequency low-noise amplifier, a rear-end intermediate-frequency coaxial laser, a rear-end intermediate-frequency light-operated circuit, a rear-end low-pass filter, a rear-end clock low-noise amplifier, a rear-end clock coaxial laser and a rear-end clock light-operated circuit. The input end of the rear-end power divider forms a mixed radio frequency input end of the rear-end photoelectric radio frequency processing unit. The intermediate frequency output end of the rear end power divider is connected with the input end of the rear end intermediate frequency low noise amplifier through the rear end high pass filter, the output end of the rear end intermediate frequency low noise amplifier is connected with the input end of the rear end intermediate frequency coaxial laser, and the output end of the rear end intermediate frequency coaxial laser forms an intermediate frequency light output end of the rear end photoelectric radio frequency processing unit. The output end of the rear-end intermediate-frequency light control circuit is connected with the control end of the rear-end intermediate-frequency coaxial laser. The clock output end of the rear-end power divider is connected with the input end of the rear-end clock low-noise amplifier through the rear-end low-pass filter, the output end of the rear-end low-noise amplifier is connected with the input end of the rear-end clock coaxial laser, and the output end of the rear-end clock coaxial laser forms the clock output end of the rear-end photoelectric radio frequency processing unit. The output end of the back-end clock light control circuit is connected with the control end of the back-end clock coaxial laser. The power supply ends of the rear-end intermediate frequency low-noise amplifier, the rear-end intermediate frequency coaxial laser, the rear-end intermediate frequency light-operated circuit, the rear-end clock low-noise amplifier, the rear-end clock coaxial laser and the rear-end clock light-operated circuit form an active power supply input end of the rear-end photoelectric radio frequency processing unit. The rear-end photoelectric radio frequency processing unit completes the filtering, amplifying and photoelectric conversion processing of the uplink intermediate frequency signal, completes the filtering, amplifying and electro-optical processing of the 10MHz reference clock signal and the separation of the intermediate frequency signal and the clock signal.
The back-end power supply unit comprises a back-end direct current filter and a back-end DC/DC power supply module. The input of the back-end dc filter forms the external power input of the back-end power supply unit. The output end of the back-end direct current filter is connected with the input end of the back-end DC/DC power supply module. The output of the back-end DC/DC power module forms the active power supply output of the back-end power unit. The back-end power supply unit only supplies power to the current component, the external power supply input interface inputs direct current, the direct current is sent to the direct current filter to filter power interference clutter, the filtered direct current is input to the DC/DC power supply module, the DC/DC power supply module can convert direct current power supply with the input range of 8V-25V into two groups of direct current of +5V and 5V to output to the uplink front-end photoelectric radio frequency processing unit, wherein the +5V maximum load is 200mA, the 5V maximum load is 100mA, the conversion efficiency is calculated according to 70%, and the maximum power consumption of the component is not more than 3W.
The rear-end tube type wavelength division multiplexer comprises 1550nm and 1310nm channels, the channel window is lambda + -10 nm (lambda is the central wavelength), the isolation is more than 30dB, and the channel window is wide enough to cover the wavelength drift range (lambda-7.5 nm-lambda+5 nm) of the coaxial laser when the coaxial laser works at high and low temperatures (-50 ℃ to +75 ℃).
The 10MHz reference clock signal is input into the rear end component through the N-J type radio frequency interface and enters the rear end power divider, and in view of size limitation, the selected rear end power divider is a power divider chip which can only cover 5 MHz-2.5 GHz, and the 10MHz insertion loss is smaller than 4dB. Since the back-end power divider is a broadband device, the isolation between the intermediate frequency band and the reference clock is less than 20dB, and the isolation is insufficient, the reference clock signal is input into the back-end low-pass filter after passing through the back-end power divider. The rear-end low-pass filter has the function of increasing the isolation degree with the intermediate frequency signal, the selected rear-end low-pass filter is an LTCC type LC filter chip, the 10MHz frequency point insertion loss is smaller than 1dB, and the 500 MHz-2.5 GHz rejection ratio is larger than 50dBc. After filtering, the signal is amplified by using a rear-end clock low-noise amplifier, the gain of the clock low-noise amplifier is more than 15dB in the frequency range of 1 MHz-100 MHz, the noise coefficient is less than 3dB, and the output 1dB compression point is more than 18dBm. The signal output by the rear-end clock low-noise amplifier enters the rear-end clock coaxial laser, and the working frequency band of the rear-end clock coaxial laser selected by the embodiment covers 5 MHz-3.5 GHz, and the working wavelength is 1310nm. And controlling the rear-end clock coaxial laser through the rear-end clock light control circuit to ensure that the fiber output power is more than 7dBm, and then injecting the fiber output power into the rear-end tubular wavelength division multiplexer. The back-end clock light control circuit of this example is implemented by a monolithic integrated circuit. The back-end component designed in this example has an input 1dB compression point of Zhong Lianlu of about +8dBm, and can be matched with the conventional clock output power (+3 dBm to +7 dBm).
The intermediate frequency signal is input into the rear end component through the N-J type radio frequency interface and enters the rear end power divider. The rear-end power divider is a broadband device, the isolation between the intermediate frequency band and the reference clock is less than 20dB, and the isolation is insufficient, so that an intermediate frequency signal is input into the rear-end high-pass filter after passing through the power divider, and the insertion loss of the intermediate frequency band power divider is less than 5dB. The back-end high-pass filter has the function of increasing the isolation degree with the reference clock, the back-end high-pass filter selected by the example is an LC filter chip of an LTCC type, the insertion loss of 500 MHz-2.5 GHz is less than 1dB, and the rejection ratio at the 10MHz frequency point is more than 60dBc. After filtering, the signal is amplified by using a rear-end intermediate-frequency low-noise amplifier, the gain of the rear-end intermediate-frequency low-noise amplifier is larger than 18dB in the frequency range of 500 MHz-3 GHz, the noise coefficient is smaller than 3dB, and the output 1dB compression point is larger than 20dBm. The signal output by the rear-end intermediate-frequency low-noise amplifier enters the rear-end intermediate-frequency coaxial laser, and the working frequency band of the rear-end intermediate-frequency coaxial laser selected by the embodiment covers 5 MHz-3.5 GHz, and the working wavelength is 1550nm. The rear-end intermediate frequency coaxial laser is controlled by the rear-end intermediate frequency light control circuit, so that the fiber output power is more than 7dBm, and then the fiber output power is injected into the rear-end tubular wavelength division multiplexer. The back-end intermediate frequency light control circuit of the embodiment is realized by a monolithic integrated circuit. The back-end component designed in this example, in which the input 1dB compression point of the frequency link is about +7dbm, can be matched with the input power of conventional BUC equipment.
The invention designs a miniaturized plug-and-play assembly which is matched with a photoelectric hybrid radio frequency cable/optical cable to realize the optical fiber substitution of a radio frequency feeder. Because the front end component and the rear end component both use miniaturized design, the front end component can be directly screwed on the radio frequency input interface of BUC equipment at the antenna end, and the rear end component can also be directly screwed on the clock at the machine room end and the output port of intermediate frequency equipment. The rear end optical interface on the rear end shielding box is connected with the front end optical interface on the front end shielding box through an optical cable. The optical cable has 1-core optical fiber inside and outer coating with tensile strength, and is suitable for outdoor deployment. The fiber optic cable may be directly threaded onto the front end assembly and the back end assembly to allow for in situ replacement. The invention can prolong the transmission distance of the radio frequency feeder line originally connecting the antenna end and the tower base end from tens of meters to more than 10km, directly realize in-situ substitution, and can realize the different-place layout of the antenna end equipment and the tower base end equipment very conveniently.
Claims (3)
1. The photoelectric radio frequency feeder line assembly applied to the uplink communication link is characterized by comprising a front end assembly, a rear end assembly and an optical cable;
The front end assembly comprises a front end shielding box, a front end power supply unit, a front end tubular wavelength division multiplexer and a front end photoelectric radio frequency processing unit, wherein the front end power supply unit, the front end tubular wavelength division multiplexer and the front end photoelectric radio frequency processing unit are arranged in the front end shielding box; the front end shielding box is provided with a front end external power input interface, a front end optical interface and a front end hybrid radio frequency interface; the external power supply input end of the front-end power supply unit is connected with the front-end external power supply input interface on the front-end shielding box, and the active power supply output end of the front-end power supply unit is connected with the active power supply input end of the front-end photoelectric radio frequency processing unit; the combined optical port of the front-end tube type wavelength division multiplexer is connected with a front-end optical interface on the front-end shielding box, and the intermediate frequency optical output end and the clock optical output end of the front-end tube type wavelength division multiplexer are respectively connected with the intermediate frequency optical input end and the clock optical input end of the front-end photoelectric radio frequency processing unit; the mixed radio frequency output end of the front-end photoelectric radio frequency processing unit is connected with a front-end mixed radio frequency interface on the front-end shielding box;
The front-end power supply unit comprises a front-end direct current filter and a front-end DC/DC power supply module; the input end of the front-end direct current filter forms an external power supply input end of the front-end power supply unit; the output end of the front-end direct current filter is connected with the input end of the front-end DC/DC power supply module; the output end of the front-end DC/DC power supply module forms an active power supply output end of the front-end power supply unit;
The front-end photoelectric radio frequency processing unit comprises a front-end intermediate frequency coaxial detector, a front-end intermediate frequency low-noise amplifier, a front-end high-pass filter, a front-end clock coaxial detector, a front-end clock AGC amplifier, a front-end low-pass filter and a front-end combiner; the input end of the front-end intermediate frequency coaxial detector forms an intermediate frequency light input end of the front-end photoelectric radio frequency processing unit; the output end of the front-end intermediate frequency coaxial detector is connected with the input end of the front-end high-pass filter through the front-end intermediate frequency low-noise amplifier, and the output end of the front-end high-pass filter is connected with the intermediate frequency input end of the front-end combiner; the input end of the front-end clock coaxial detector forms a clock light input end of the front-end photoelectric radio frequency processing unit; the output end of the front-end clock coaxial detector is connected with the input end of the front-end low-pass filter through the front-end clock AGC amplifier, and the output end of the front-end low-pass filter is connected with the clock input end of the front-end combiner; the output end of the front-end combiner forms a mixed radio frequency output end of the front-end photoelectric radio frequency processing unit; the power supply ends of the front-end intermediate frequency coaxial detector, the front-end intermediate frequency low-noise amplifier, the front-end clock coaxial detector and the front-end clock AGC amplifier form an active power supply input end of the front-end photoelectric radio frequency processing unit;
The rear end component comprises a rear end shielding box, a rear end power supply unit, a rear end photoelectric radio frequency processing unit and a rear end tubular wavelength division multiplexer, wherein the rear end power supply unit, the rear end photoelectric radio frequency processing unit and the rear end tubular wavelength division multiplexer are arranged in the rear end shielding box; the rear end shielding box is provided with a rear end external power input interface, a rear end hybrid radio frequency interface and a rear end optical interface; the external power supply input end of the rear end power supply unit is connected with the rear end external power supply input interface on the rear end shielding box, and the active power supply output end of the rear end power supply unit is connected with the active power supply input end of the rear end photoelectric radio frequency processing unit; the mixed radio frequency input end of the rear-end photoelectric radio frequency processing unit is connected with a rear-end mixed radio frequency interface on the rear-end shielding box, and the intermediate frequency light output end and the clock light output end of the rear-end photoelectric radio frequency processing unit are respectively connected with the intermediate frequency light input end and the clock light input end of the rear-end tubular wavelength division multiplexer; the combined optical port of the rear-end tube type wavelength division multiplexer is connected with a rear-end optical interface on the rear-end shielding box;
the back-end power supply unit comprises a back-end direct current filter and a back-end DC/DC power supply module; the input end of the back-end direct current filter forms an external power supply input end of the back-end power supply unit; the output end of the back-end direct current filter is connected with the input end of the back-end DC/DC power supply module; the output end of the back-end DC/DC power supply module forms an active power supply output end of the back-end power supply unit;
The rear-end photoelectric radio frequency processing unit comprises a rear-end power divider, a rear-end high-pass filter, a rear-end intermediate frequency low-noise amplifier, a rear-end intermediate frequency coaxial laser, a rear-end intermediate frequency light-operated circuit, a rear-end low-pass filter, a rear-end clock low-noise amplifier, a rear-end clock coaxial laser and a rear-end clock light-operated circuit; the input end of the rear-end power divider forms a mixed radio frequency input end of the rear-end photoelectric radio frequency processing unit; the intermediate frequency output end of the rear end power divider is connected with the input end of the rear end intermediate frequency low noise amplifier through the rear end high pass filter, the output end of the rear end intermediate frequency low noise amplifier is connected with the input end of the rear end intermediate frequency coaxial laser, and the output end of the rear end intermediate frequency coaxial laser forms an intermediate frequency light output end of the rear end photoelectric radio frequency processing unit; the output end of the rear-end intermediate-frequency light control circuit is connected with the control end of the rear-end intermediate-frequency coaxial laser; the clock output end of the rear-end power divider is connected with the input end of the rear-end clock low-noise amplifier through the rear-end low-pass filter, the output end of the rear-end low-noise amplifier is connected with the input end of the rear-end clock coaxial laser, and the output end of the rear-end clock coaxial laser forms the clock output end of the rear-end photoelectric radio frequency processing unit; the output end of the back-end clock light control circuit is connected with the control end of the back-end clock coaxial laser; the power supply ends of the rear-end intermediate frequency low-noise amplifier, the rear-end intermediate frequency coaxial laser, the rear-end intermediate frequency light-operated circuit, the rear-end clock low-noise amplifier, the rear-end clock coaxial laser and the rear-end clock light-operated circuit form an active power supply input end of the rear-end photoelectric radio frequency processing unit;
The rear end optical interface on the rear end shielding box is connected with the front end optical interface on the front end shielding box through an optical cable.
2. The optoelectronic radio frequency feeder assembly as set forth in claim 1, wherein the front end shield case and the back end shield case are dual-cavity shield cases;
The front-end photoelectric radio frequency processing unit is positioned at the upper layer of the front-end shielding box, and the front-end tubular wavelength division multiplexer and the front-end power supply unit are positioned at the lower layer of the front-end shielding box;
the rear-end photoelectric radio frequency processing unit is positioned on the upper layer of the rear-end shielding box, and the rear-end tubular wavelength division multiplexer and the rear-end power supply unit are positioned on the lower layer of the rear-end shielding box.
3. The optoelectronic radio frequency feeder assembly as claimed in claim 1, wherein the front-end hybrid radio frequency interface and the back-end hybrid radio frequency interface are both N-J connectors; the front-end optical interface and the rear-end optical interface are both photoelectric aerospace sockets; the front external power input interface and the rear external power input interface are both SMA-K type or F-K type connectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010722594.2A CN111884723B (en) | 2020-07-24 | 2020-07-24 | Photoelectric radio frequency feeder line assembly applied to uplink communication link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010722594.2A CN111884723B (en) | 2020-07-24 | 2020-07-24 | Photoelectric radio frequency feeder line assembly applied to uplink communication link |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111884723A CN111884723A (en) | 2020-11-03 |
| CN111884723B true CN111884723B (en) | 2024-05-28 |
Family
ID=73200399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010722594.2A Active CN111884723B (en) | 2020-07-24 | 2020-07-24 | Photoelectric radio frequency feeder line assembly applied to uplink communication link |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111884723B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204855812U (en) * | 2015-03-06 | 2015-12-09 | 中国人民解放军63961部队 | Difference information transmission means |
| CN105403870A (en) * | 2015-12-02 | 2016-03-16 | 中国电子科技集团公司第四十一研究所 | General signal generator for radar target simulation |
| CN108847891A (en) * | 2018-05-30 | 2018-11-20 | 武汉虹信通信技术有限责任公司 | A kind of distributed small base station system of light-carried wireless electricity |
| CN212572562U (en) * | 2020-07-24 | 2021-02-19 | 中国电子科技集团公司第三十四研究所 | Photoelectric radio frequency feeder line component applied to uplink communication link |
-
2020
- 2020-07-24 CN CN202010722594.2A patent/CN111884723B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204855812U (en) * | 2015-03-06 | 2015-12-09 | 中国人民解放军63961部队 | Difference information transmission means |
| CN105403870A (en) * | 2015-12-02 | 2016-03-16 | 中国电子科技集团公司第四十一研究所 | General signal generator for radar target simulation |
| CN108847891A (en) * | 2018-05-30 | 2018-11-20 | 武汉虹信通信技术有限责任公司 | A kind of distributed small base station system of light-carried wireless electricity |
| CN212572562U (en) * | 2020-07-24 | 2021-02-19 | 中国电子科技集团公司第三十四研究所 | Photoelectric radio frequency feeder line component applied to uplink communication link |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111884723A (en) | 2020-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1391897A1 (en) | A cable, a two-part connector therefor, a unit comprising a part of the two-part connector, and a fixed station for mobile telecommunications | |
| CN102355207B (en) | Ka frequency-band solid-state power amplifier | |
| CN103117803B (en) | Space-borne microwave and laser communication link integrating system and application method | |
| CN104333334B (en) | Satellite navigation aviation strengthening system broadband low noise radio frequency amplifier and transmitting device | |
| CN212572563U (en) | Photoelectric radio frequency feeder line component applied to downlink communication link | |
| CN101094032A (en) | Radio signal coverage system | |
| EP1617511A1 (en) | RF antenna array structure | |
| CN201365254Y (en) | Novel one-drag-more intelligent radio frequency optical module | |
| CN111884724B (en) | Photoelectric radio frequency feeder line assembly applied to downlink communication link | |
| CN212572562U (en) | Photoelectric radio frequency feeder line component applied to uplink communication link | |
| CN111884723B (en) | Photoelectric radio frequency feeder line assembly applied to uplink communication link | |
| CN201118558Y (en) | Short wave digital broadband transmission network device | |
| CN111884725B (en) | Multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly | |
| CN209072499U (en) | A kind of radar radio frequency photoreceiver | |
| CN105846899A (en) | Broadband radio frequency signal optical fiber transmission system | |
| CN101646267A (en) | Novel repeater system | |
| CN212064015U (en) | Radio frequency optical transmission system of integrated field amplifier front end | |
| US11558117B2 (en) | Wireless radio frequency conversion system | |
| CN105262541B (en) | Aerial space-based radiofrequency signal optical fiber teletransmission time dissemination system | |
| CN112564783B (en) | Resource-saving laser radio frequency integrated communication method | |
| CN212572567U (en) | Multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly | |
| CN203014823U (en) | Dual-frequency intelligent optical radio frequency integrated terminal | |
| CN104902211A (en) | System for realizing 4G signal deep coverage based on radio and television platform coaxial cable | |
| CN101388721A (en) | System and method for implementing indoor covering in TD-SCDMA network | |
| CN201018508Y (en) | Preposition satellite receiving/transmitting circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |