CN111884725B - Multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly - Google Patents
Multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly Download PDFInfo
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- H—ELECTRICITY
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Abstract
The invention discloses a multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly, which comprises a light transmitting assembly and a light receiving assembly. The light emitting assembly consists of an emission shielding box, a radio frequency light emitting plate and an emission monitoring plate. The light receiving assembly consists of a receiving shielding box, a radio frequency light receiving plate and a receiving monitoring plate. The invention integrates the high isolation of the radio frequency amplifying module, the light emitting/receiving module and the monitoring module in the traditional radio frequency optical transmission equipment through the integrated design of the multifunctional unit, initiates an intelligent control mode based on multi-information sensing to be suitable for various application scenes, and realizes the ultra-flat coverage of the full-frequency band gain of 30 MHz-4 GHz.
Description
Technical Field
The invention relates to the technical field of radio frequency optical communication, in particular to a multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly.
Background
In military and civil radio frequency signal communication, radio frequency optical transmission equipment is generally used for remote signal transmission, such as antenna signals, radar signals, intermediate frequency signals and time-frequency signals which need remote transmission in applications of short wave/ultra short wave antennas, mobile base stations, satellite ground stations and the like, and the signals can be remotely transmitted by using the radio frequency optical transmission equipment. The radio frequency optical transmission device is composed of an optical transmitter and an optical receiver. At present, as shown in fig. 1, a conventional radio frequency optical transmission device in each frequency band is generally composed of an optical transmitting module, a radio frequency amplifying module with adjustable transmitting gain, a transmitting monitoring module and a transmitting power module; the optical receiver generally comprises an optical receiving module, a receiving gain adjustable radio frequency amplifying module, a receiving monitoring module and a receiving power supply module. The radio frequency signal enters the emission gain adjustable radio frequency amplification module through the connector to amplify and gain adjust the radio frequency signal, and the amplified radio frequency signal is input into the optical emission module to perform electric/optical conversion and then output an optical signal. The optical signals are transmitted to the optical receiving module through the optical cable to carry out optical/electrical conversion, and the weak radio frequency signals output by the optical receiving module are amplified by the gain-adjustable radio frequency amplifying module and then output. The transmitting and receiving monitoring modules are respectively used for outputting gain adjusting signals to the transmitting and receiving gain adjustable radio frequency amplifying modules, and collecting output/input optical power information of the optical transmitting/receiving modules, and the information is interacted with an external control computer through a serial port or a network port. The transmitting and receiving power supply modules supply power to the optical transmitter and the optical receiver, respectively.
The conventional radio frequency optical transmission device generally adopts a mode of assembling discrete functional modules to realize radio frequency optical transmission and simple gain control functions, and has the following disadvantages although the device has the advantages of simple structure and easy realization:
1. the integration level is low: the number of modules in the equipment is large, the connection between the modules is complex, so that the assembly and the debugging are complex, the integration capability is poor due to the multi-module design, and the miniaturization of the equipment is difficult to realize;
2. broadband performance is poor: the working bandwidth of 30 MHz-4 GHz can not be completely covered on the basis of meeting the radio frequency gain control function, and the customization is required according to the working frequency band of a user.
3. The intelligent degree is not high: the device cannot be self-adaptive to different electromagnetic environments and light path environments;
4. Application scene limitation: the method can not be suitable for different transmission performance requirements such as large dynamic, stable amplitude, stable gain and the like;
5. Health status parameter monitoring is incomplete: only providing indication of whether the power supply of the whole machine exists or not and the state of the optical power, and monitoring the lack of key parameters such as voltage, current, working temperature and the like;
Disclosure of Invention
The invention aims to solve the problems of low integration level and poor broadband performance of the traditional radio frequency optical transmission equipment and provides a multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly.
In order to solve the problems, the invention is realized by the following technical scheme:
A multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly comprises an optical transmitting assembly and an optical receiving assembly. The light emitting assembly consists of an emission shielding box, a radio frequency light emitting plate and an emission monitoring plate; an emission middle partition board is arranged in the inner cavity of the emission double-layer cavity shielding box, and the inner cavity of the emission shielding box is divided into an upper layer of relatively independent cavity and a lower layer of relatively independent cavity; the radio frequency light emitting plate is arranged on the upper layer of the emission shielding box, and the emission monitoring plate is arranged on the lower layer of the emission shielding box; the radio frequency light emitting plate is electrically connected with the emission monitoring plate through a group of emission opposite-plug connectors penetrating through the emission middle partition plate; the radio frequency input end and the radio frequency light output end of the radio frequency light emitting plate, and the direct current power supply input end and the serial port management end of the emission monitoring plate are led out of the emission shielding box. The light receiving assembly consists of a receiving shielding box, a radio frequency light receiving plate and a receiving monitoring plate; a receiving middle partition board is arranged in the inner cavity of the receiving double-layer cavity shielding box, and the inner cavity of the receiving shielding box is divided into an upper layer of relatively independent cavity and a lower layer of relatively independent cavity; the radio frequency light receiving plate is arranged on the upper layer of the receiving shielding box, and the receiving monitoring plate is arranged on the lower layer of the receiving shielding box; the radio frequency light receiving plate is electrically connected with the receiving monitoring plate through a group of receiving butt-plug connectors penetrating through the receiving middle partition plate; the radio frequency light input end and the radio frequency output end of the radio frequency light receiving plate, and the direct current power supply input end and the serial port management end of the receiving monitoring plate are led out of the receiving shielding box. The radio frequency input end of the radio frequency light emitting plate forms the radio frequency input end of the integrated transmitting and receiving assembly, the radio frequency light output end of the radio frequency light emitting plate is connected with the radio frequency light input end of the radio frequency light receiving plate, and the radio frequency output end of the radio frequency light receiving plate forms the radio frequency output end of the integrated transmitting and receiving assembly; the direct current power supply input end of the transmitting monitoring board and the direct current power supply input end of the receiving monitoring board are connected with an external power supply; the serial port management end of the transmitting monitoring board and the serial port management end of the receiving monitoring board are connected with an external control computer.
In the scheme, the radio frequency light emitting board is integrated with the emission limiter, the emission numerical control attenuator, the emission primary low noise amplifier, the emission secondary low noise amplifier, the emission coupler, the emission detector, the emission temperature compensation attenuator, the emission broadband gain equalizer, the emission pi-shaped attenuation circuit, the power amplification stage in the emission final stage, the emission laser, the emission light control temperature control circuit and the first emission opposite-plug connector. The input end of the transmitting limiter forms a radio frequency input end of the radio frequency light emitting plate; the output end of the transmitting limiter is connected with the input end of the transmitting primary low-noise amplifier through the transmitting digital control attenuator; the control end of the emission numerical control attenuator is connected with the first emission opposite-plug connector; the output end of the transmitting primary low noise amplifier is connected with the input end of the transmitting coupler through the transmitting secondary low noise amplifier; the output end of the transmitting coupler branch is connected with the input end of the transmitting detector, and the output end of the transmitting detector is connected with the first transmitting opposite-plug connector; the main output end of the transmitting coupler is connected with the input end of the transmitting temperature compensation attenuator; the output end of the emission temperature compensation attenuator is connected with the input end of the emission pi-shaped attenuation circuit through the emission broadband gain equalizer; the output end of the emission pi-shaped attenuation circuit is connected with the input end of the emission laser through a power amplification stage in the emission final stage; the output end of the emission light-control temperature control circuit is connected with the control end of the emission laser; the sensing end of the emission light-control temperature control circuit is connected with the first emission opposite-plug connector; the output end of the emitting laser forms a radio frequency light output end of the radio frequency light emitting plate; the power supply ends of the emission numerical control attenuator, the emission primary low noise amplifier, the emission secondary low noise amplifier, the emission detector, the power amplification stage in the emission final stage, the emission laser and the emission light control temperature control circuit are connected with the first emission opposite plug connector.
In the scheme, the working bandwidths of the transmitting limiter, the transmitting numerical control attenuator, the transmitting primary low-noise amplifier, the transmitting secondary low-noise amplifier, the transmitting coupler, the transmitting detector, the transmitting temperature compensation attenuator, the transmitting broadband gain equalizer, the transmitting pi-shaped attenuation circuit, the power amplifying stage in the transmitting final stage and the transmitting laser cover the frequency band of 30 MHz-4 GHz.
In the above scheme, the radio frequency optical receiving board is integrated with a receiving optical attenuator, a receiving optical detector, a receiving optical path self-adaptive circuit, a receiving primary low noise amplifier, a receiving digital control attenuator, a receiving temperature compensation attenuator, a receiving broadband gain equalizer, a receiving secondary low noise amplifier, a receiving coupler, a receiving detector, a receiving pi-shaped attenuation circuit and a first receiving opposite-inserting connector. The input end of the receiving optical attenuator forms a radio frequency optical input end of a radio frequency optical receiving plate; the output end of the receiving optical attenuator is connected with the input end of the receiving optical detector, the input end of the receiving optical path self-adaptive circuit is connected with the sensing end of the receiving optical detector, and the output end of the receiving optical path self-adaptive circuit is connected with the control end of the receiving optical attenuator; the sensing end of the receiving optical detector is connected with the first receiving opposite-inserting connector; the output end of the receiving optical detector is connected with the input end of the receiving numerical control attenuator through the receiving primary low noise amplifier; the control end of the receiving numerical control attenuator is connected with the first receiving opposite-plug connector; the output end of the receiving numerical control attenuator is connected with the input end of the receiving broadband gain equalizer through the receiving temperature compensation attenuator; the output end of the receiving broadband gain equalizer is connected with the input end of the receiving coupler through the receiving secondary low noise amplifier; the output end of the branch of the receiving coupler is connected with the input end of the receiving detector, and the output end of the receiving detector is connected with the first receiving opposite-plug connector; the output end of the main circuit of the receiving coupler is connected with the input end of the receiving pi-shaped attenuation circuit, and the output end of the receiving pi-shaped attenuation circuit forms the radio frequency output end of the radio frequency light receiving plate; the power supply ends of the receiving optical attenuator, the receiving optical detector, the receiving optical path self-adaptive circuit, the receiving primary low noise amplifier, the receiving numerical control attenuator, the receiving secondary low noise amplifier and the receiving detector are connected with the first receiving opposite-inserting connector.
In the scheme, the working bandwidths of the receiving photodetector, the receiving light path self-adaptive circuit, the receiving primary low-noise amplifier, the receiving numerical control attenuator, the receiving temperature compensation attenuator, the receiving broadband gain equalizer, the receiving secondary low-noise amplifier, the receiving coupler, the receiving detector and the receiving pi-shaped attenuation circuit cover the frequency band of 30 MHz-4 GHz.
In the scheme, the transmitting monitoring board is integrated with a transmitting power supply filter circuit, a transmitting voltage and current detection circuit, a transmitting temperature detection circuit, a transmitting singlechip, a transmitting serial port interface circuit and a second transmitting opposite plug connector. The input end of the emission power supply filter circuit forms a direct current power supply input end of the emission monitoring board, and the output end of the emission power supply filter circuit is connected with the emission singlechip, the emission voltage and current detection circuit, the emission temperature detection circuit, the emission serial port interface circuit and the second emission opposite-plug connector; the output ends of the emission voltage and current detection circuit and the emission temperature detection circuit are connected with the input end of the emission singlechip; one end of the transmitting serial interface circuit is connected with the input and output port of the transmitting singlechip, and the other end of the transmitting serial interface circuit forms a serial management end of the transmitting power supply filter circuit.
In the scheme, a receiving power supply filter circuit, a receiving voltage and current detection circuit, a receiving temperature detection circuit, a receiving singlechip, a receiving serial port interface circuit and a second receiving opposite plug connector are integrated on the receiving monitoring board. The input end of the receiving power supply filter circuit forms a direct current power supply input end of the receiving monitoring board, and the output end of the receiving power supply filter circuit is connected with the receiving singlechip, the receiving voltage and current detection circuit, the receiving temperature detection circuit, the receiving serial interface circuit and the second receiving opposite plug connector; the output ends of the receiving voltage and current detection circuit and the receiving temperature detection circuit are connected with the input end of the receiving singlechip; one end of the receiving serial port interface circuit is connected with the input and output port of the receiving singlechip, and the other end of the receiving serial port interface circuit forms a serial port management end of the receiving power supply filter circuit.
In the scheme, the transmission middle partition plate is provided with the charged through Kong Birang pits and the connection through grooves of the radio frequency light-emitting plate, and shielding bosses are designed around the connection through grooves; the receiving middle partition board is provided with a charged through Kong Birang pit of the radio frequency light receiving board and a connecting slot for receiving the penetration of the opposite-plug connector, and shielding bosses are designed around the connecting slot.
In the scheme, the external control computer controls the working mode of the light emitting component and/or the light receiving component through component serial port setting, wherein the working mode comprises a conventional mode, a dynamic range intelligent expansion mode and a stable amplitude output mode; the conventional mode is configured on the light emitting component and the light receiving component; the dynamic range intelligent expansion mode is configured on the light emitting component; the stable amplitude output mode is configured on the light receiving component.
Compared with the prior art, the invention has the following characteristics:
1. The integration level is high: the upper and lower lamination is oppositely inserted, the photoelectric integrated design is realized, and the functions of amplifying, sensing and controlling the radio frequency signals, photoelectric/electro-optical conversion, monitoring, reporting and the like are realized by the small-size volume;
2. Ultra-wideband: the ultra-flat (2 dB) transmission of the full frequency band of 30 MHz-4 GHz can be realized on the basis of completing various radio frequency functions;
3. dynamic intelligent expansion: -110dBm to +20dBm oversized input signal dynamic range intelligent expansion;
4. The working mode is optional: the conventional mode, the intelligent expansion of the dynamic range and the stable amplitude output mode are selectable;
5. Full state monitoring: component voltage, current, temperature, input/output radio frequency power (80 dB large dynamic), input/output optical power and other component all-state parameters are quantitatively detected and reported;
6. The electromagnetic compatibility is good: the full shielding box body, the filter connector, the upper cavity, the lower cavity and the like are used for conducting isolation and radiation electromagnetic shielding.
Drawings
Fig. 1 is a schematic diagram of a conventional rf optical transmission device.
Fig. 2 is a schematic view showing the structure of the light emitting module and the light receiving module of the present invention.
Fig. 3 is a schematic view of the internal structure of the double-layer cavity shielding box of the present invention, (a) is an upper layer cavity and a middle partition plate, and (b) is a lower layer cavity.
Fig. 4 is a schematic diagram of a light emitting device according to the present invention.
Fig. 5 is a schematic diagram of a light receiving assembly according to the present invention.
Fig. 6 shows gain in-band flatness curves (S21), input standing wave test curves (S11) and output standing wave test curves (S22) of the present invention tested using a vector analyzer.
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.
A multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly consists of a multipurpose broadband radio frequency intelligent photoelectric integrated light transmitting assembly (hereinafter referred to as a light transmitting assembly) and a multipurpose broadband radio frequency intelligent photoelectric integrated light receiving assembly (hereinafter referred to as a light receiving assembly).
The light emitting component completes the functions of power sensing, amplifying, intelligent control and electro-optic conversion of an input radio frequency signal, completes the self-checking of the component and reports various state information of the component through a serial port. The light emitting assembly consists of a high-isolation emitting shielding box, a radio frequency light emitting plate and an emitting monitoring plate. Referring to fig. 2 and 3, an emission middle partition board is arranged in the inner cavity of the emission double-layer cavity shielding box, and the inner cavity of the emission shielding box is divided into an upper layer of independent cavity and a lower layer of independent cavity. In this embodiment, the transmitting double-layer cavity shielding box is milled for an independent aluminum ingot and comprises an upper layer cavity, a lower layer cavity and a transmitting middle interlayer. The transmission middle partition board is provided with a charged through Kong Birang pit and a connecting through groove of the radio frequency light-emitting plate, shielding bosses are designed around the connecting through groove, and the bosses are matched with the metallized bonding pads at the corresponding attaching positions of the transmission monitoring plate to complete the shielding of the upper cavity and the lower cavity to the inserting connecting through groove. The radio frequency light emitting plate is arranged on the upper layer of the emission shielding box, and the emission monitoring plate is arranged on the lower layer of the emission shielding box. The radio frequency light emitting plate and the emission monitoring plate are electrically connected through a group of emission opposite-plug connectors penetrating through the emission middle partition plate. The radio frequency input end and the radio frequency light output end of the radio frequency light emitting plate, and the direct current power supply input end and the serial port management end of the emission monitoring plate are led out of the emission shielding box. In order to realize the electromagnetic compatibility of the components, a digital circuit (an emission monitoring board) and an analog circuit (a radio frequency light emission board) are required to be isolated, an application cavity is designed into an upper cavity and a lower cavity, the radio frequency light emission board is distributed in the upper cavity, the emission monitoring board is distributed in the lower cavity, the middle of the application cavity is connected through an opposite-plug connector, and the opposite-plug connector penetrates through the upper cavity and the lower cavity to be connected with a through groove. The upper cavity and the lower cavity are only provided with two radiation channels connected with the through grooves, the two radiation channels are thoroughly isolated by a shielding cavity formed by the conductive copper coating on the bottom layer of the upper cavity radio frequency light emitting plate, the shielding boss of the lower cavity and the shielding fence of the lower monitoring circuit board, and the radiation interference path of the digital-analog circuit is blocked. One group of the transmitting plug connectors comprises 2 parts, one part is a first transmitting plug connector integrated on the radio frequency light emitting plate, namely a male plug connector, and the other part is a second transmitting plug connector integrated on the transmitting monitoring plate, namely a female connector. Because the radio frequency light-emitting plate and the emission monitoring plate are communicated by using the pluggable opposite-plug connector, the welding of the interconnecting cable is not needed, the replacement speed of the functional unit of the assembly is greatly improved, and the maintainability of the assembly is improved.
Referring to fig. 4, a transmitting limiter, a transmitting digital controlled attenuator, a transmitting primary low noise amplifier, a transmitting secondary low noise amplifier, a transmitting coupler, a transmitting detector, a transmitting temperature compensating attenuator, a transmitting broadband gain equalizer, a transmitting pi-shaped attenuation circuit, a power amplifying stage in a transmitting final stage, a transmitting laser, a transmitting light-controlled temperature controlling circuit and a male plug-in connector are integrated on the radio frequency light emitting board. The input of the emission limiter forms the radio frequency light input of the radio frequency light emitting panel. The output end of the transmitting limiter is connected with the input end of the transmitting primary low noise amplifier through the transmitting digital control attenuator. The control end of the emission numerical control attenuator is connected with the male type opposite-plug connector. The output of the transmit primary low noise amplifier is connected to the input of the transmit coupler via a transmit secondary low noise amplifier. The output end of the transmitting coupler branch is connected with the input end of the transmitting detector, and the output end of the transmitting detector is connected with the male butt-joint connector. The output end of the main path of the transmitting coupler is connected with the input end of the transmitting temperature compensation attenuator. The output end of the transmitting temperature compensation attenuator is connected with the input end of the transmitting pi-shaped attenuation circuit through the transmitting broadband gain equalizer. The output of the emission pi-shaped attenuation circuit is connected with the input of the emission laser through a power amplification stage in the emission final stage. The output end of the emission light-control temperature control circuit is connected with the control end of the emission laser. The sensing end of the light-emitting control temperature control circuit is connected with the male butt-plug connector. The output end of the transmitting laser forms the radio frequency output end of the radio frequency light emitting plate. The power supply ends of the emission numerical control attenuator, the emission primary low noise amplifier, the emission secondary low noise amplifier, the emission detector, the power amplification stage in the emission final stage, the emission laser and the emission light control temperature control circuit are connected with the male butt-joint connector.
The radio frequency signal is input to the radio frequency light emitting plate, and the peak clipping treatment protection of the high-power signal is carried out through the bypass to the ground emission limiter, so that the radio frequency device at the later stage is protected from being damaged due to the injection of the high-power (more than or equal to 10 dBm) signal. Then the radio frequency signal passes through the emission numerical control attenuator, the emission numerical control attenuator is controlled by the emission monitoring board, the main function of the emission numerical control attenuator is to expand the dynamic range of the input signal of the light emission component, the attenuation is carried out when the input signal is overlarge (more than or equal to-10 dBm), and the radio frequency power after passing through the emission numerical control attenuator is kept in a low noise and high linear balanced interval (-15 dBm to-10 dBm) of the component. The transmitting primary low noise amplifier is used for carrying out primary amplification on the input radio frequency signal, and the noise coefficient of the device is about 2dB and the gain is 15dB. And the transmitting secondary low-noise amplifier amplifies the main-path radio frequency signal output by the transmitting primary low-noise amplifier again, wherein the parameters of the transmitting secondary low-noise amplifier are the same as those of the transmitting primary low-noise amplifier. The signal amplified by the transmit secondary low noise amplifier is coupled via a transmit coupler. The transmitting coupler divides a part of power on the main path signal and sends the power to the transmitting detector for radio frequency power detection, and the transmitting detector outputs detection voltage and sends the detection voltage to the transmitting monitoring board. The transmitting coupler outputs a main path signal to the transmitting temperature compensation attenuator, and the transmitting temperature compensation attenuator is used for balancing the variation of the gains of all stages of amplifiers (namely a transmitting primary low-noise amplifier, a transmitting secondary low-noise amplifier and a power amplifying stage in a transmitting final stage) and the transmitting laser of the radio frequency optical transmitting plate under high-low temperature operation. The conventional radio frequency light emitting component has the characteristics of large low-temperature attenuation and small high-temperature attenuation, and the emission temperature compensating attenuator provided by the invention has the characteristics of large low-temperature attenuation and small high Wen Cui attenuation, and offsets the high-low temperature gain change of the radio frequency light emitting component so as to achieve the purpose of stable component gain. The emission temperature compensation attenuator sends the signals after temperature compensation attenuation to the emission broadband gain equalizer, and the emission broadband gain equalizer is a gain flatness positive slope device and is used for equalizing negative slope gain fading under broadband conditions of the light emission component. The transmitting pi-shaped attenuation circuit is arranged after the transmitting broadband gain equalizer and is used for adjusting the radio frequency gain of the radio frequency optical light emitting plate. The power amplification stage in the emission final stage linearly amplifies the signal output by the emission pi-shaped attenuation circuit to proper power and transmits the proper power to the emission laser, and the output power of the power amplification stage in the emission final stage is more than or equal to 20dBm. The emitting laser performs electric/optical conversion under the assistance of the emitting light-control temperature control circuit, and finally outputs optical power, and the emitting monitor board can obtain the information of the output optical power of the emitting laser in a table look-up mode by verifying the bias voltage of the emitting laser given by the emitting light-control temperature control circuit. The male type opposite plug connector is connected with the female type opposite plug connector of the emission monitoring board, and has three main functions: the method comprises the steps of connecting power from an emission monitoring board with ground, inputting sensing information such as input radio frequency power information, output optical power information and the like into the emission monitoring board, and outputting control information of an emission numerical control attenuator from the monitoring board to the optical light-emitting board. In the invention, the working bandwidths of a transmitting limiter, a transmitting numerical control attenuator, a transmitting primary low noise amplifier, a transmitting secondary low noise amplifier, a transmitting coupler, a transmitting detector, a transmitting temperature compensation attenuator, a transmitting broadband gain equalizer, a transmitting pi-shaped attenuation circuit, a power amplifying stage in a transmitting final stage and a transmitting laser cover a frequency band of 30 MHz-4 GHz. The radio frequency light emitting board uses broadband photoelectric and radio frequency devices, and the auxiliary multi-stage broadband gain equalization design enables the assembly to realize 30 MHz-4 GHz full-frequency band ultra-flat (2 dB) transmission on the basis of completing various radio frequency functions.
Referring to fig. 4, a transmitting power supply filter circuit, a transmitting voltage and current detection circuit, a transmitting temperature detection circuit, a transmitting singlechip, a transmitting serial interface circuit and a female plug-in connector are integrated on the transmitting monitoring board. The input end of the emission power supply filter circuit forms a direct current power supply input end of the emission monitoring board, and the output end of the emission power supply filter circuit is connected with the emission singlechip, the emission voltage and current detection circuit, the emission temperature detection circuit, the emission serial port interface circuit and the female plug-in connector. The output ends of the emission voltage and current detection circuit and the emission temperature detection circuit are connected with the input end of the emission singlechip. One end of the transmitting serial interface circuit is connected with the input and output port of the transmitting singlechip, and the other end of the transmitting serial interface circuit forms a serial management end of the transmitting power supply filter circuit.
The transmitting power supply filter circuit carries out bypass filtering on an input direct current power supply and carries out overcurrent and voltage reverse connection protection. The transmitting voltage and current detection circuit is matched with an A/D converter of the transmitting singlechip to detect the voltage and the current of each group of direct current power supplies. The emission temperature detection circuit is matched with an A/D converter of the emission singlechip to measure the working temperature of the component. The transmitting serial interface circuit is matched with the transmitting singlechip to report various state information, alarm/early warning information and software upgrading and control information of the components in the pair, and the operating mode is achieved. The transmitting single chip microcomputer is a control core of the whole light transmitting assembly, extracts the input/output radio frequency power information, the input/output light power information, the voltage and current information of an input power supply, the working temperature information of the assembly and the user control information of the assembly to store, analyze, calculate and compare, so that the numerical control attenuator of the light transmitting/receiving plate is controlled to realize the functions of intelligent expansion of dynamic range and gain adjustment, and realize the signal input power overload alarm, light power input undersize alarm, current abnormality alarm, temperature abnormality alarm and sub-health state early warning of the assembly. The female type opposite-plug connector is connected with the male type opposite-plug connector of the radio frequency light emitting plate. The invention uses the singlechip to collect the voltage, temperature, input/output radio frequency power/optical power in the component, monitors the component full state parameters, realizes the alarming functions of super-amplitude alarming of the input radio frequency signal, over-small/overload alarming of the optical power, working temperature alarming and the like, and early warns the component faults caused by the device cold welding, hidden injury and aging by monitoring and recording the current state and comparing the monitoring history records. The singlechip is used for controlling the numerical control attenuator in the light emitting component to complete the automatic expansion function of the dynamic range by utilizing the input/output radio frequency signals acquired by the component. The transmitting monitoring board inputs a direct-current power supply through a filter connector on the cavity and carries out serial port communication with external control equipment of the assembly, the on-board opposite plug connector is used for supplying power to the radio-frequency light emitting board, radio-frequency power information and optical power information transmitted by the radio-frequency light emitting board are collected, information such as voltage, current and temperature on the board of the transmitting monitoring board is collected, and the intelligent gain regulation and control are carried out on the radio-frequency light emitting board by combining with an internal control program of the transmitting singlechip to carry out assembly state reporting and warning/early warning.
The optical receiving component completes sensing of an input optical signal, self-adaptive adjustment of optical power and photoelectric conversion, completes amplification, intelligent control and output power sensing of a radio frequency signal, completes self-detection of the component and reports various state information of the component through a serial port. The light receiving assembly consists of a high-isolation receiving shielding box, a radio frequency light receiving plate and a receiving monitoring plate. Referring to fig. 2 and 3, a receiving middle partition board is arranged in the inner cavity of the receiving double-layer cavity shielding box, and divides the inner cavity of the receiving shielding box into an upper layer and a lower layer of relatively independent cavities. In this embodiment, the receiving double-layer cavity shielding box is milled for an independent aluminum ingot and comprises an upper layer cavity, a lower layer cavity and a receiving middle interlayer. The receiving middle partition board is provided with a charged through Kong Birang pit of the radio frequency light receiving board and a connecting slot for receiving the through of the opposite-plug connector, shielding bosses are designed around the connecting slot, and the bosses cooperate with the metallized bonding pads at the corresponding attaching positions of the receiving monitoring board to complete the shielding of the upper cavity and the lower cavity to the opposite-plug connecting slot. The radio frequency light receiving plate is arranged on the upper layer of the receiving shielding box, and the receiving monitoring plate is arranged on the lower layer of the receiving shielding box. The radio frequency light receiving plate and the receiving monitoring plate are electrically connected through a group of receiving butt-plug connectors penetrating through the receiving middle partition plate. The radio frequency light input end and the radio frequency output end of the radio frequency light receiving plate, and the direct current power supply input end and the serial port management end of the receiving monitoring plate are led out of the receiving shielding box. In order to realize the electromagnetic compatibility of the components, a digital circuit (a receiving monitoring board) and an analog circuit (a radio frequency light receiving board) are required to be isolated, the invention firstly designs an application cavity into an upper cavity and a lower cavity, the radio frequency light receiving board is distributed in the upper cavity, the receiving monitoring board is distributed in the lower cavity, the middle is connected through an opposite-plug connector, and the opposite-plug connector penetrates through the upper cavity and the lower cavity to be connected with a through groove. The upper cavity and the lower cavity are only provided with two radiation channels connected with the through grooves, the two radiation channels are thoroughly isolated by a shielding cavity formed by the conductive copper coating on the bottom layer of the upper cavity radio frequency light receiving plate, the shielding boss of the lower cavity and the shielding fence of the lower receiving monitoring circuit board, and the radiation interference path of the digital-analog circuit is blocked. The group of the receiving and inserting connectors comprises 2 parts, one part is a first receiving and inserting connector integrated on the radio frequency light receiving plate, namely a male type inserting connector, and the other part is a second receiving and inserting connector integrated on the receiving and monitoring plate, namely a female type inserting connector. Because the radio frequency light receiving plate and the receiving monitoring plate are communicated by using the pluggable opposite-plug connector, the welding of the interconnecting cable is not needed, the replacement speed of the functional unit of the assembly is greatly improved, and the maintainability of the assembly is improved.
Referring to fig. 5, a receiving optical attenuator, a receiving optical detector, a receiving optical path adaptive circuit, a receiving primary low noise amplifier, a receiving digital control attenuator, a receiving temperature compensation attenuator, a receiving broadband gain equalizer, a receiving secondary low noise amplifier, a receiving coupler, a receiving detector, a receiving pi-shaped attenuation circuit and a male plug-in connector are integrated on a radio frequency optical receiving board. The input end of the receiving optical attenuator forms the radio frequency optical input end of the radio frequency optical receiving plate. The output end of the receiving optical attenuator is connected with the input end of the receiving optical detector, the input end of the receiving optical path self-adaptive circuit is connected with the sensing end of the receiving optical detector, and the output end of the receiving optical path self-adaptive circuit is connected with the control end of the receiving optical attenuator. The sensing end of the receiving photodetector is connected with the male plug-in connector. The output end of the receiving light detector is connected with the input end of the receiving numerical control attenuator through the receiving primary low noise amplifier. The control end of the receiving numerical control attenuator is connected with the male type opposite-plug connector. The output end of the receiving digital control attenuator is connected with the input end of the receiving broadband gain equalizer through the receiving temperature compensation attenuator. The output of the receiving broadband gain equalizer is connected to the input of the receiving coupler via a receiving secondary low noise amplifier. The output end of the branch of the receiving coupler is connected with the input end of the receiving detector, and the output end of the receiving detector is connected with the male butt-joint connector. The output end of the main circuit of the receiving coupler is connected with the input end of the receiving pi-shaped attenuation circuit, and the output end of the receiving pi-shaped attenuation circuit forms the radio frequency output end of the radio frequency light receiving plate. The power supply ends of the receiving optical attenuator, the receiving optical detector, the receiving optical path self-adaptive circuit, the receiving primary low noise amplifier, the receiving numerical control attenuator, the receiving secondary low noise amplifier and the receiving detector are connected with the male butt-joint connector.
The optical signal bearing the radio frequency information is firstly input into a receiving optical attenuator, enters a receiving optical detector after optical path adaptive attenuation, and the receiving optical detector, the receiving optical attenuator and a receiving optical path adaptive circuit form a loop based on an analog operational amplifier negative feedback principle by means of the receiving optical detector, the receiving optical attenuator and the receiving optical path adaptive circuit so as to ensure that the optical power of the receiving optical detector is constant when the optical power of an input optical receiving plate changes within a certain range, thereby ensuring the stability of the output radio frequency signal of the receiving optical detector. The receiving primary low noise amplifier performs primary amplification on the weak radio frequency signal after the optical detector performs optical/electrical conversion, and the noise coefficient of the selected device is about 2dB, and the gain is 15dB. Then the radio frequency signal passes through a receiving numerical control attenuator, and the receiving numerical control attenuator is controlled by a receiving monitoring board of the light receiving assembly, so that the gain control and the stable amplitude output functions of the light receiving assembly can be realized. The receiving digital control attenuator sends the radio frequency signal to the receiving temperature compensation attenuator, and the receiving temperature compensation attenuator is used for balancing the gain change of each stage of amplifier (namely a receiving primary low noise amplifier and a receiving secondary low noise amplifier) and a receiving optical detector of the optical receiving plate under high and low temperature operation. The receiving temperature compensation attenuator sends the radio frequency signal to the receiving broadband gain equalizer, and the receiving broadband gain equalizer is a gain flatness positive slope device and is used for equalizing the negative slope gain fading of the optical transmitting component under the broadband condition. The receiving secondary low noise amplifier amplifies the signal output by the receiving broadband gain equalizer and sends the amplified signal to the receiving coupler, and the receiving secondary low noise amplifier has the same model as the receiving primary low noise amplifier. The receiving coupler divides a part of power of a main path signal output by the receiving secondary low noise amplifier and sends the power to the receiving detector for radio frequency power detection, and the detection voltage output by the receiving detector is sent to the receiving monitoring board to finish verification of output power. The receiving coupler outputs a main signal to the receiving pi-shaped attenuation circuit, and the receiving pi-shaped attenuation circuit is used for adjusting the output signal power and realizing impedance matching. The male type opposite plug connector is connected with the female type opposite plug connector of the receiving monitoring board, and has three main functions: the receiving monitoring board is connected with the ground, sensing information such as output radio frequency power information, input optical power information and the like is input into the receiving monitoring board, and control information of the receiving numerical control attenuator is output to the radio frequency optical receiving board from the receiving monitoring board. In the invention, the working bandwidths of a receiving photodetector, a receiving light path self-adaptive circuit, a receiving primary low noise amplifier, a receiving numerical control attenuator, a receiving temperature compensation attenuator, a receiving broadband gain equalizer, a receiving secondary low noise amplifier, a receiving coupler, a receiving detector and a receiving pi-shaped attenuation circuit cover the frequency band of 30 MHz-4 GHz. The radio frequency optical receiving plate uses broadband photoelectric and radio frequency devices, and the auxiliary multi-stage broadband gain equalization design enables the assembly to realize 30 MHz-4 GHz full-frequency band ultra-flat (2 dB) transmission on the basis of completing various radio frequency functions.
Referring to fig. 5, a receiving power supply filter circuit, a receiving voltage and current detection circuit, a receiving temperature detection circuit, a receiving singlechip, a receiving serial interface circuit and a female plug-in connector are integrated on the receiving monitoring board. The input end of the receiving power supply filter circuit forms a direct current power supply input end of the receiving monitoring board, and the output end of the receiving power supply filter circuit is connected with the receiving singlechip, the receiving voltage and current detection circuit, the receiving temperature detection circuit, the receiving serial interface circuit and the female plug-in connector. The output ends of the receiving voltage and current detection circuit and the receiving temperature detection circuit are connected with the input end of the receiving singlechip. One end of the receiving serial port interface circuit is connected with the input and output port of the receiving singlechip, and the other end of the receiving serial port interface circuit forms a serial port management end of the receiving power supply filter circuit.
The receiving power supply filter circuit carries out bypass filtering on the input direct current power supply and carries out overcurrent and voltage reverse connection protection. The receiving voltage and current detection circuit is matched with an A/D converter of the receiving singlechip to detect the voltage and the current of each group of direct current power supplies. The receiving temperature detection circuit is matched with an A/D converter of the receiving singlechip to measure the working temperature of the component. The receiving serial interface circuit is matched with the receiving singlechip to report various state information, alarm/early warning information and software upgrading and control information of the components in a pair, and the receiving serial interface circuit is in a working mode. The female type opposite-plug connector is connected with the male type opposite-plug connector of the radio frequency light emitting plate. The invention uses the receiving singlechip to collect the voltage, temperature, input/output radio frequency power/optical power in the receiving component, monitors the component full state parameters, realizes the alarming functions of optical power undersize/overload alarming, working temperature alarming and the like, and early warns the component faults of the device caused by the device cold welding, hidden injury and aging in advance through monitoring and recording the current state and comparing the statistics. The singlechip is used for controlling the numerical control attenuator in the light receiving component to finish the amplitude stabilizing output function by utilizing the output radio frequency signals acquired by the component. The receiving monitoring board inputs a direct current power supply through a filter connector on the cavity and carries out serial port communication with external control equipment of the assembly, the radio frequency light receiving board is powered through the onboard opposite plug connector, radio frequency power information and optical power information transmitted by the radio frequency light receiving board are collected, information such as voltage, current and temperature on the board of the receiving monitoring board is collected, and the intelligent gain regulation and control are carried out on the radio frequency light receiving board by combining with an internal control program of the receiving singlechip to carry out assembly state reporting and warning/early warning.
The radio frequency input end of the radio frequency light emitting plate forms the radio frequency input end of the integrated transmitting and receiving assembly, the radio frequency light output end of the radio frequency light emitting plate is connected with the radio frequency light input end of the radio frequency light receiving plate through an optical fiber, and the radio frequency output end of the radio frequency light receiving plate forms the radio frequency output end of the integrated transmitting and receiving assembly. The direct current power supply input end of the transmitting monitoring board and the direct current power supply input end of the receiving monitoring board are connected with an external power supply. The serial port management end of the transmitting monitoring board and the serial port management end of the receiving monitoring board are connected with an external control computer. The external power supply connection and the external control computer connection are connected through a filter connector arranged on the shielding box.
The light emitting assembly and the light receiving assembly are high-isolation double-layer cavity shielding boxes, and the light emitting assembly comprises an upper cover plate, a lower cover plate and a double-layer cavity. The high-isolation double-layer cavity shielding box is used for packaging and isolating the radio frequency light emitting plate/light receiving plate and the monitoring plate, carrying and installing the filter connector and providing a mechanical installation interface for the outside. The upper cover plate is used for completing the outer shielding of the upper cavity, the lower cover plate is used for completing the outer shielding of the lower cavity, the double-layer cavity is milled for an independent aluminum ingot and comprises an upper cavity, a lower cavity and a middle partition plate, the middle partition plate is provided with a charged Kong Birang pit of a radio frequency light emitting/receiving plate and a connecting through groove of an opposite-plug connector, shielding bosses are designed around the connecting through groove, and the bosses are matched with metallized bonding pads at corresponding bonding positions of a monitoring plate to complete the shielding of the upper cavity and the lower cavity to the opposite-plug connecting through groove. According to the invention, the upper and lower independent cavities are fully shielded and laminated in the aspect of structural design, so that the opposite connection of the transmitting/receiving plate and the monitoring plate is realized, the shielding fence design of the circuit board is matched, the electromagnetic radiation interference of the upper and lower cavities is effectively isolated, and good maintainability is realized. The light emitting component and the light receiving component are not distinguished into an integrated design, so that the universality of the two component structures is realized. Because the signal flow directions of the light emitting component and the light receiving component are opposite, the device layouts are also greatly different, and two design methods are used for realizing the design of the integrated structure of the receiving/transmitting component: first, because the light-emitting plate and the light-receiving plate are made of microwave plate, the bottom layer is made of integral conductive copper and is attached to the middle interlayer of the upper cavity, and the middle interlayer is provided with the charged through Kong Birang pit for avoiding the charged via hole, the charged through Kong Birang pit arranged on the middle interlayer of the cavity can simultaneously accommodate the light-emitting plate and the light-receiving plate. Secondly, two upper and lower cavity communicating grooves are designed on the middle interlayer to be used as channels of the opposite-plug connector, and only one of the light emitting plate/light receiving plate and the monitoring plate is used when the light emitting plate/light receiving plate is communicated with the monitoring plate.
The radio frequency optical light-emitting plate and the optical receiving component use broadband photoelectric and radio frequency devices, and the auxiliary multi-stage broadband gain equalization design ensures that the component can realize 30 MHz-4 GHz full-frequency band ultra-flat (2 dB) transmission on the basis of completing various radio frequency functions. The broadband optoelectronic device comprises: laser and detector. The radio frequency device comprises a limiter, a primary amplifier, a coupler, a secondary amplifier, a numerical control attenuator and a non-intermediate power amplifier which are contained in the light transmitting/receiving board. The working bandwidth of all the selected devices completely covers 30 MHz-4 GHz, and the gain flatness in the working bandwidth can be ensured to be within 3 dB. The gain flatness of the rf optical transmission link is not only determined by the devices used, but also by the degree of impedance matching between the stages, the resistance, capacitance and distribution parameters on the transmission line and transmission line, and overall the gain curve of the link is also monotonically negative slope downward, and the gain flatness of the full bandwidth is expected to be 8dB on the basis of not using a wideband equalizer. According to the invention, a broadband gain equalizer is respectively designed on the light emitting plate and the light receiving plate, and through ADS circuit simulation and actual debugging, the positive slope characteristic of the broadband gain equalizer is utilized to effectively offset the negative slope brought by all stages of devices on the circuit, so that the gain flatness of the broadband of 30 MHz-4 GHz is realized. The gain in-band flatness curve (S21), the input standing wave test curve (S11) and the output standing wave test curve (S22) obtained by testing the present invention using a vector analyzer are shown in fig. 6.
The invention can realize the digital information acquisition and monitoring of the input/output radio frequency power/optical power, voltage, current and temperature of the component. The alarm functions of super-amplitude alarm, light power undersize/overload alarm, working temperature alarm and the like of the input radio frequency signals are realized, and the component faults of the device caused by the false welding, hidden injury and aging of the device are early warned in advance.
The input/output radio frequency power information collection is completed by matching a coupling detection circuit on an optical transmitting/receiving board with a singlechip on a monitoring board, the coupling detection circuit mainly comprises a coupler and a detector, a signal test point of the optical transmitting board is arranged behind a secondary low noise amplifier, a signal test point of the optical receiving board is arranged behind the secondary low noise amplifier, the coupler divides part of power on a signal main path of the test point and sends the power to a logarithmic detector for radio frequency power detection, detection voltage of the logarithmic detector output changing along with the radio frequency power is sent to an A/D converter of the singlechip of the monitoring board for digital processing through an inserting connector, the digital radio frequency power information is compared with an existing power information table inside the singlechip to obtain an input/output power value, and the power information table is established by using a power value input/output by an instrument test assembly and matching data collected by a corresponding singlechip A/D converter during assembly debugging.
The input/output optical power information acquisition is to send the bias voltage of the detector/laser to the singlechip A/D converter through the plug-in connector for digital processing, the digital radio frequency power information is compared with the existing power information table in the singlechip to obtain an input/output power value, and the power information table is established by using a meter to test the power value input/output by the assembly and matching the data acquired by the corresponding singlechip A/D converter during assembly debugging.
The monitoring board is integrated with a voltage and current detection circuit, a temperature detection circuit, a multifunctional single chip microcomputer (integrated with a multipath A/D, D/A converter), a serial interface circuit and a female plug-in connector. The voltage and current detection circuit is matched with an A/D converter of the singlechip to detect the voltage and the current of each group of direct current power supplies. The temperature detection circuit is matched with the singlechip A/D converter to measure the working temperature of the component. The multifunctional single chip microcomputer is a monitoring core of the whole assembly, and can find out abrupt change or slow change of parameter states caused by device cold welding, hidden injury and aging by extracting input/output radio frequency power information, input/output optical power information, voltage and current information of an input power supply and working temperature information of the assembly to carry out real-time digitization, storage, calculation, analysis and comparison, so that early warning is carried out on the health state of the assembly. By setting the alarm threshold, the overload alarm of the signal input power, the undersize alarm of the optical power input, the abnormal current alarm and the abnormal temperature alarm can be realized.
The present invention may provide for a variety of operational modes including: the conventional mode, the dynamic range intelligent expansion mode and the stable amplitude output mode are selectable, and the three modes can be set through an external computer through a component serial port.
Conventional modes are often used where the user has his own subjective control needs for the transmission link and configures the composition parameters according to his own needs. When the light emitting module and the light receiving module are set in a normal mode, the external control interface configures a numerical control attenuator on the light emitting/receiving board through the serial port of the module to control the gain of the module, and the gain configuration is not carried out in the module.
The dynamic range intelligent expansion mode is configured on the light emitting component, is commonly used in complex electromagnetic environments and scenes with larger dynamic range of signals transmitted by the component, and utilizes the power information of the input radio frequency signals acquired by the light emitting component when the dynamic range intelligent expansion mode is set, and automatically controls a numerical control attenuator in the component to complete automatic expansion of the dynamic range of the input radio frequency signals. In the light emitting assembly, the monitoring board singlechip judges whether an input signal is close to an overload value, and when the power of the input signal reaches the overload point, the numerical control attenuator of the light emitting board is controlled to amplify the input signal to attenuate the input signal, so that the power of the signal reaching the detection point is ensured to be lower than the overload value. When the input signal is lower than the overload point, the numerical control attenuator of the optical light emitting plate is also controlled to reduce attenuation of the input signal, and the function of automatically adjusting the dynamic range of the input signal is achieved by continuous power detection, comparison, attenuation control and continuous power detection, wherein the maximum adjusting range depends on the adjusting range of the numerical control attenuator, and the adjusting range of the data attenuator used in the method is 31dB, so that the limit of automatically expanding the dynamic range of the input radio frequency signal is 31dB.
The stable amplitude output mode is configured on the light receiving component, is commonly used for transmitting radio frequency light which needs stable amplitude output such as a transmission clock, a local oscillator and the like, and is commonly used for eliminating unstable states of output signal power caused by input signal fluctuation, optical path insertion loss fluctuation and device high-low temperature gain fluctuation. When the light receiving is set to a stable amplitude output mode, an external control computer outputs a target power value to the light receiving component through a serial port, a singlechip on a monitoring board in the light receiving component compares the power value of an output radio frequency signal acquired by the component with the output target power value, and if the verification power value of the output radio frequency signal is inconsistent with the set radio frequency power value, the singlechip is used for controlling the attenuation value of a numerical control attenuator in the light receiving board to achieve the consistency of the output power and the target power value.
According to the invention, in the aspect of structural design, the upper and lower independent cavities are fully shielded and laminated to realize the opposite connection of the transmitting/receiving plate and the monitoring plate, and the circuit board shielding fence is matched to effectively isolate electromagnetic radiation interference of the upper and lower cavities, so that good maintainability is realized; the light emitting component and the light receiving component are not distinguished into an integrated design, so that the universality of the two component structures is realized. Because the signal flow directions of the light emitting component and the light receiving component are opposite, the device layouts are also greatly different, and two design methods are used for realizing the design of the integrated structure of the receiving/transmitting component: firstly, because the bottom layers of the light-emitting plate and the light-receiving plate are the microwave plates, the bottom layers of the microwave plates are integrally conductive copper coated and are attached to the middle interlayer of the upper cavity, and charged through Kong Birang pits are formed in the middle interlayer for avoiding the charged through holes, the charged through Kong Birang pits formed in the middle interlayer of the cavity can simultaneously accommodate the light-emitting plate and the light-receiving plate; secondly, two upper and lower cavity communicating grooves are designed on the middle interlayer to be used as channels of the opposite-plug connector, and only one of the light emitting plate/light receiving plate and the monitoring plate is used when the light emitting plate/light receiving plate is communicated with the monitoring plate. Because the light emitting plate/the light receiving plate is communicated with the monitoring plate by using the pluggable opposite-plug connector, welding is not needed, the replacement speed of the functional unit of the assembly is greatly improved, and the maintainability of the assembly is improved.
In order to realize the electromagnetic compatibility of the components, a digital circuit (a monitoring board) and an analog circuit (a light emitting board/a light receiving board) are required to be isolated, an application cavity is designed into an upper cavity and a lower cavity, the upper cavity is used for distributing the light emitting board/the light receiving board, the lower cavity is used for distributing the monitoring board, the middle is connected through an opposite-plug connector, and the opposite-plug connector penetrates through the upper cavity and the lower cavity to be connected with a through groove; the upper cavity and the lower cavity are only provided with two radiation channels connected with the through grooves, the two radiation channels are thoroughly isolated by a shielding cavity formed by the conductive copper coating on the bottom layer of the upper cavity light emitting plate/light receiving plate, the shielding boss of the lower cavity and the shielding fence of the lower monitoring circuit board, and the radiation interference path of the digital-analog circuit is blocked.
The invention integrates the high isolation of the radio frequency amplifying module, the light emitting/receiving module and the monitoring module in the traditional radio frequency optical transmission equipment through the integrated design of the multifunctional unit, initiates an intelligent control mode based on multi-information sensing to be suitable for various application scenes, and realizes the ultra-flat coverage of the full-frequency band gain of 30 MHz-4 GHz.
It should be noted that, although the examples described above are illustrative, this is not a limitation of the present invention, and thus the present invention is not limited to the above-described specific embodiments. Other embodiments, which are apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein, are considered to be within the scope of the invention as claimed.
Claims (5)
1. The multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly comprises an optical transmitting assembly and an optical receiving assembly; it is characterized in that the method comprises the steps of,
The light emitting assembly consists of an emission shielding box, a radio frequency light emitting plate and an emission monitoring plate; an emission middle partition board is arranged in the inner cavity of the emission double-layer cavity shielding box, and the inner cavity of the emission shielding box is divided into an upper layer of relatively independent cavity and a lower layer of relatively independent cavity; the radio frequency light emitting plate is arranged on the upper layer of the emission shielding box, and the emission monitoring plate is arranged on the lower layer of the emission shielding box; the radio frequency light emitting plate is electrically connected with the emission monitoring plate through a group of emission opposite-plug connectors penetrating through the emission middle partition plate; the radio frequency input end and the radio frequency light output end of the radio frequency light emitting plate, and the direct current power supply input end and the serial port management end of the emission monitoring plate are led out of the emission shielding box;
The radio frequency light emitting board is integrated with a transmitting limiter, a transmitting digital control attenuator, a transmitting primary low noise amplifier, a transmitting secondary low noise amplifier, a transmitting coupler, a transmitting detector, a transmitting temperature compensation attenuator, a transmitting broadband gain equalizer, a transmitting pi-shaped attenuation circuit, a transmitting final stage middle power amplifier, a transmitting laser, a transmitting light control temperature control circuit and a first transmitting opposite plug-in connector; the input end of the transmitting limiter forms a radio frequency input end of the radio frequency light emitting plate; the output end of the transmitting limiter is connected with the input end of the transmitting primary low-noise amplifier through the transmitting digital control attenuator; the control end of the emission numerical control attenuator is connected with the first emission opposite-plug connector; the output end of the transmitting primary low noise amplifier is connected with the input end of the transmitting coupler through the transmitting secondary low noise amplifier; the output end of the transmitting coupler branch is connected with the input end of the transmitting detector, and the output end of the transmitting detector is connected with the first transmitting opposite-plug connector; the main output end of the transmitting coupler is connected with the input end of the transmitting temperature compensation attenuator; the output end of the emission temperature compensation attenuator is connected with the input end of the emission pi-shaped attenuation circuit through the emission broadband gain equalizer; the output end of the emission pi-shaped attenuation circuit is connected with the input end of the emission laser through a power amplifier in the emission final stage; the output end of the emission light-control temperature control circuit is connected with the control end of the emission laser; the sensing end of the emission light-control temperature control circuit is connected with the first emission opposite-plug connector; the output end of the emitting laser forms a radio frequency light output end of the radio frequency light emitting plate; the power ends of the emission numerical control attenuator, the emission primary low-noise amplifier, the emission secondary low-noise amplifier, the emission detector, the emission final stage middle power amplifier, the emission laser and the emission light-control temperature control circuit are connected with a first emission opposite plug connector;
The transmitting monitoring board is integrated with a transmitting power supply filter circuit, a transmitting voltage and current detection circuit, a transmitting temperature detection circuit, a transmitting singlechip, a transmitting serial port interface circuit and a second transmitting opposite plug connector; the input end of the emission power supply filter circuit forms a direct current power supply input end of the emission monitoring board, and the output end of the emission power supply filter circuit is connected with the emission singlechip, the emission voltage and current detection circuit, the emission temperature detection circuit, the emission serial port interface circuit and the second emission opposite-plug connector; the output ends of the emission voltage and current detection circuit and the emission temperature detection circuit are connected with the input end of the emission singlechip; one end of the transmitting serial port interface circuit is connected with the input and output port of the transmitting singlechip, and the other end of the transmitting serial port interface circuit forms a serial port management end of the transmitting power supply filter circuit;
The light receiving assembly consists of a receiving shielding box, a radio frequency light receiving plate and a receiving monitoring plate; a receiving middle partition board is arranged in the inner cavity of the receiving double-layer cavity shielding box, and the inner cavity of the receiving shielding box is divided into an upper layer of relatively independent cavity and a lower layer of relatively independent cavity; the radio frequency light receiving plate is arranged on the upper layer of the receiving shielding box, and the receiving monitoring plate is arranged on the lower layer of the receiving shielding box; the radio frequency light receiving plate is electrically connected with the receiving monitoring plate through a group of receiving butt-plug connectors penetrating through the receiving middle partition plate; the radio frequency light input end and the radio frequency output end of the radio frequency light receiving plate, the direct current power supply input end and the serial port management end of the receiving monitoring plate are led out of the receiving shielding box;
The radio frequency light receiving plate is integrated with a receiving light attenuator, a receiving light detector, a receiving light path self-adaptive circuit, a receiving primary low noise amplifier, a receiving numerical control attenuator, a receiving temperature compensation attenuator, a receiving broadband gain equalizer, a receiving secondary low noise amplifier, a receiving coupler, a receiving detector, a receiving pi-shaped attenuation circuit and a first receiving opposite plug-in connector; the input end of the receiving optical attenuator forms a radio frequency optical input end of a radio frequency optical receiving plate; the output end of the receiving optical attenuator is connected with the input end of the receiving optical detector, the input end of the receiving optical path self-adaptive circuit is connected with the sensing end of the receiving optical detector, and the output end of the receiving optical path self-adaptive circuit is connected with the control end of the receiving optical attenuator; the sensing end of the receiving optical detector is connected with the first receiving opposite-inserting connector; the output end of the receiving optical detector is connected with the input end of the receiving numerical control attenuator through the receiving primary low noise amplifier; the control end of the receiving numerical control attenuator is connected with the first receiving opposite-plug connector; the output end of the receiving numerical control attenuator is connected with the input end of the receiving broadband gain equalizer through the receiving temperature compensation attenuator; the output end of the receiving broadband gain equalizer is connected with the input end of the receiving coupler through the receiving secondary low noise amplifier; the output end of the branch of the receiving coupler is connected with the input end of the receiving detector, and the output end of the receiving detector is connected with the first receiving opposite-plug connector; the output end of the main circuit of the receiving coupler is connected with the input end of the receiving pi-shaped attenuation circuit, and the output end of the receiving pi-shaped attenuation circuit forms the radio frequency output end of the radio frequency light receiving plate; the power supply ends of the receiving optical attenuator, the receiving optical detector, the receiving optical path self-adaptive circuit, the receiving primary low noise amplifier, the receiving numerical control attenuator, the receiving secondary low noise amplifier and the receiving detector are connected with the first receiving opposite-plug connector;
The receiving monitoring board is integrated with a receiving power supply filter circuit, a receiving voltage and current detection circuit, a receiving temperature detection circuit, a receiving singlechip, a receiving serial port interface circuit and a second receiving opposite plug connector; the input end of the receiving power supply filter circuit forms a direct current power supply input end of the receiving monitoring board, and the output end of the receiving power supply filter circuit is connected with the receiving singlechip, the receiving voltage and current detection circuit, the receiving temperature detection circuit, the receiving serial interface circuit and the second receiving opposite plug connector; the output ends of the receiving voltage and current detection circuit and the receiving temperature detection circuit are connected with the input end of the receiving singlechip; one end of the receiving serial port interface circuit is connected with the input and output port of the receiving singlechip, and the other end of the receiving serial port interface circuit forms a serial port management end of the receiving power supply filter circuit;
The radio frequency input end of the radio frequency light emitting plate forms the radio frequency input end of the integrated transmitting and receiving assembly, the radio frequency light output end of the radio frequency light emitting plate is connected with the radio frequency light input end of the radio frequency light receiving plate, and the radio frequency output end of the radio frequency light receiving plate forms the radio frequency output end of the integrated transmitting and receiving assembly; the direct current power supply input end of the transmitting monitoring board and the direct current power supply input end of the receiving monitoring board are connected with an external power supply; the serial port management end of the transmitting monitoring board and the serial port management end of the receiving monitoring board are connected with an external control computer.
2. The multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly according to claim 1, wherein the operating bandwidths of a transmitting limiter, a transmitting digital controlled attenuator, a transmitting primary low noise amplifier, a transmitting secondary low noise amplifier, a transmitting coupler, a transmitting detector, a transmitting temperature compensation attenuator, a transmitting broadband gain equalizer, a transmitting pi-shaped attenuation circuit, a transmitting final stage power amplifier and a transmitting laser cover a frequency band of 30 MHz-4 GHz.
3. The multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly according to claim 1, wherein the working bandwidths of the receiving photodetector, the receiving optical path self-adapting circuit, the receiving primary low noise amplifier, the receiving digital control attenuator, the receiving temperature compensation attenuator, the receiving broadband gain equalizer, the receiving secondary low noise amplifier, the receiving coupler, the receiving detector and the receiving pi-shaped attenuation circuit cover a frequency band of 30 MHz-4 GHz.
4. The multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly according to claim 1, wherein a charged through Kong Birang pit and a connecting through groove of a radio frequency light emitting plate are arranged on a transmitting middle partition plate, and shielding bosses are designed around the connecting through groove; the receiving middle partition board is provided with a charged through Kong Birang pit of the radio frequency light receiving board and a connecting slot for receiving the penetration of the opposite-plug connector, and shielding bosses are designed around the connecting slot.
5. The multipurpose broadband intelligent radio frequency photoelectric integrated transmitting and receiving assembly according to claim 1, wherein an external control computer controls the working mode of the light transmitting assembly and/or the light receiving assembly through assembly serial port setting, wherein the working mode comprises a normal mode, a dynamic range intelligent expansion mode and a stable amplitude output mode; the conventional mode is configured on the light emitting component and the light receiving component; the dynamic range intelligent expansion mode is configured on the light emitting component; the stable amplitude output mode is configured on the light receiving component.
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| CN114966997B (en) * | 2021-02-20 | 2023-09-26 | 青岛海信宽带多媒体技术有限公司 | Optical module and received light power monitoring method |
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| CN203014823U (en) * | 2012-10-11 | 2013-06-19 | 湖北兴泽科技有限公司 | Dual-frequency intelligent optical radio frequency integrated terminal |
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