A radio frequency millimeter wave photoelectric conversion assembly suitable for long distance transmission

Abstract

The application discloses a radio frequency millimeter wave photoelectric conversion assembly suitable for long-distance transmission, and relates to the technical fields of radio frequency signal photoelectric conversion and high-frequency millimeter wave signal transmission. The assembly comprises a transmitting end photoelectric conversion module, an optical fiber transmission link and a receiving end photoelectric conversion module. The transmitting end photoelectric conversion module is used for converting a millimeter wave radio frequency signal to obtain a modulated optical signal. The optical fiber transmission link is used for transmitting the modulated optical signal to the receiving end photoelectric conversion module. The receiving end photoelectric conversion module is used for demodulating the modulated optical signal to obtain a restored millimeter wave radio frequency signal. The application can reduce transmission loss and improve signal stability and adaptability.

Description

Technical Field

[0001] This application relates to the fields of radio frequency signal photoelectric conversion and high-frequency millimeter wave signal transmission technology, and in particular to a radio frequency millimeter wave photoelectric conversion component suitable for long-distance transmission. Background Technology

[0002] Millimeter-wave spectrum resources possess unique technological advantages such as ultra-wide bandwidth, ultra-high transmission rate, narrow beam directional transmission, low interference, and high ranging resolution, making them the core transmission carrier for next-generation mobile communications, precision detection, and remote measurement and control systems. Compared to traditional centimeter-wave RF transmission cables, conventional millimeter-wave coaxial cables have significant advantages in physical size, weight, and cabling volume, meeting the short-distance signal transmission requirements of miniaturized and integrated equipment. They are currently widely used in various short-range millimeter-wave RF devices.

[0003] However, in medium- to long-distance transmission scenarios (50m to 100m and beyond), traditional millimeter-wave coaxial cables have inherent technical defects that cannot meet engineering requirements. Millimeter-wave signals have extremely high frequencies and extremely short wavelengths. During cable transmission, conductor ohmic losses, dielectric polarization losses, and high-frequency radiation losses occur simultaneously. Under the combined effect of these three types of losses, the signal attenuation increases exponentially with the transmission distance. In transmission conditions at the hundred-meter level, millimeter-wave high-frequency signals experience significant attenuation after transmission through coaxial cables. The signal amplitude drops sharply, the signal-to-noise ratio deteriorates severely, and the effective signal may even be completely submerged by noise. This causes the backend RF receiving equipment to be unable to identify and interpret valid data, resulting in system failure. This greatly limits the application of millimeter-wave technology in scenarios such as long-distance equipment linkage, cross-regional networking, and remote high-precision measurement and control.

[0004] Currently, industry optimization methods for millimeter-wavelength transmission are relatively limited, with mainstream improvements mainly involving replacing coaxial cables with low-loss dielectric materials, optimizing cable shielding structures, and adjusting cabling methods. These optimizations only slightly reduce transmission loss per unit length and cannot fundamentally address the high-frequency loss characteristics of cable transmission. Signal distortion and attenuation issues persist in long-distance transmissions over hundreds of meters. Fiber optic transmission, with its extremely low transmission loss, absence of electromagnetic interference, ultra-wide bandwidth, long transmission distance, and lightweight, flexible cabling, is the optimal medium for long-distance high-frequency signal transmission. However, there are currently no dedicated optoelectronic conversion integrated components on the market specifically for millimeter-wave high-frequency signals. Traditional optoelectronic conversion devices are mostly adapted to low-frequency radio frequency signals and cannot meet the high-frequency, wideband, and high-precision conversion and transmission requirements of millimeter waves. This prevents the application of fiber optic's low-loss transmission advantages to millimeter-wave radio frequency systems.

[0005] In summary, the current market lacks a dedicated conversion component that is compatible with millimeter-wave high-frequency signals, can perform bidirectional photoelectric conversion, is integrated, and has high compatibility. To address the technical pain points of traditional cables, such as high transmission loss over long distances, low signal fidelity, and poor system adaptability, there is an urgent need to develop a new type of radio frequency millimeter-wave optical conversion component. Summary of the Invention

[0006] The purpose of this application is to provide a radio frequency millimeter-wave optoelectronic conversion component suitable for long-distance transmission, which can reduce transmission loss and improve signal stability and adaptability.

[0007] To achieve the above objectives, this application provides the following solution: This application provides a radio frequency millimeter-wave photoelectric conversion component suitable for long-distance transmission, including: a transmitter photoelectric conversion module, an optical fiber transmission link, and a receiver photoelectric conversion module.

[0008] The transmitter photoelectric conversion module is used to convert millimeter-wave radio frequency signals to obtain modulated optical signals.

[0009] The optical fiber transmission link is used to transmit the modulated optical signal to the receiving end photoelectric conversion module.

[0010] The receiving end photoelectric conversion module is used to demodulate the modulated optical signal to obtain the restored millimeter-wave radio frequency signal.

[0011] Optionally, the transmitter photoelectric conversion module includes: a millimeter-wave radio frequency input connector, a high-frequency signal preprocessing unit, a millimeter-wave electro-optical conversion chip, and a high-precision optical transmission interface.

[0012] The millimeter-wave radio frequency input connector is seamlessly plugged into and disconnected with the front-end millimeter-wave signal transmitting equipment to enable access to millimeter-wave radio frequency signals.

[0013] The high-frequency signal preprocessing unit is used to preprocess the millimeter-wave radio frequency signal to obtain a preprocessed millimeter-wave radio frequency signal.

[0014] The millimeter-wave electro-optic conversion chip is used to modulate the preprocessed millimeter-wave radio frequency signal to obtain a modulated optical signal.

[0015] The high-precision optical transmission interface is connected to the optical fiber transmission link and is used to output the modulated optical signal to the optical fiber transmission link.

[0016] Optionally, the high-frequency signal preprocessing unit includes: An impedance matching circuit is used to calibrate the transmission impedance of the millimeter-wave radio frequency signal to obtain an impedance-matched millimeter-wave radio frequency signal.

[0017] A high-frequency noise filtering circuit is used to filter out environmental electromagnetic noise and high-frequency interference from the impedance-matched millimeter-wave radio frequency signal to obtain a millimeter-wave radio frequency signal with high-frequency noise filtered out.

[0018] A signal compensation amplifier circuit is used to perform amplitude compensation on the millimeter-wave radio frequency signal after high-frequency noise filtering to obtain a pre-processed millimeter-wave radio frequency signal.

[0019] Optionally, the transmitter photoelectric conversion module further includes: The first embedded voltage regulator unit is used to output a constant operating voltage and suppress voltage interference caused by power grid fluctuations and equipment start-up and shutdown.

[0020] The first electrostatic discharge protection unit is used to discharge static electricity.

[0021] Optionally, the transmitter photoelectric conversion module is externally equipped with an integrated metal shielding shell to completely isolate external high-frequency electromagnetic radiation and radio frequency crosstalk.

[0022] Optionally, the optical fiber transmission link is a single-mode optical fiber.

[0023] Optionally, the receiving end photoelectric conversion module includes: a high-precision optical receiving interface, a millimeter-wave photoelectric conversion chip, a signal restoration and conditioning unit, and a millimeter-wave radio frequency output connector.

[0024] The high-precision optical receiving interface is connected to the optical fiber transmission link and is used to output the modulated optical signal to the millimeter-wave photoelectric conversion chip.

[0025] The millimeter-wave photoelectric conversion chip is used to demodulate the modulated optical signal to obtain a demodulated millimeter-wave radio frequency signal.

[0026] The signal restoration and conditioning unit is used to condition the demodulated millimeter-wave radio frequency signal to obtain the restored millimeter-wave radio frequency signal.

[0027] The millimeter-wave radio frequency output connector is connected to the back-end radio frequency system and is used to transmit the restored millimeter-wave radio frequency signal to the back-end radio frequency system.

[0028] Optionally, the signal restoration and conditioning unit includes: A waveform shaping circuit is used to shape the demodulated millimeter-wave radio frequency signal to obtain a waveform-shaped millimeter-wave radio frequency signal.

[0029] A loss-compensating amplifier circuit is used to restore the amplitude of the waveform-shaped millimeter-wave radio frequency signal to obtain an amplitude-restored millimeter-wave radio frequency signal.

[0030] A secondary filtering circuit is used to filter residual noise from the amplitude-restored millimeter-wave radio frequency signal to obtain a filtered millimeter-wave radio frequency signal.

[0031] An impedance calibration circuit is used to perform impedance calibration on the filtered millimeter-wave radio frequency signal to obtain the restored millimeter-wave radio frequency signal.

[0032] Optionally, the receiving end photoelectric conversion module further includes: The second embedded voltage regulator unit is used to output a constant operating voltage and suppress voltage interference caused by power grid fluctuations and equipment start-up and shutdown.

[0033] The second electrostatic discharge protection unit is used to discharge static electricity.

[0034] Optionally, the receiver photoelectric conversion module is externally equipped with an integrated metal shielding shell to completely isolate external high-frequency electromagnetic radiation and radio frequency crosstalk.

[0035] According to the specific embodiments provided in this application, this application has the following technical effects: This application provides a radio frequency millimeter-wave photoelectric conversion component suitable for long-distance transmission. The component includes: a transmitter photoelectric conversion module, an optical fiber transmission link, and a receiver photoelectric conversion module. The transmitter photoelectric conversion module converts millimeter-wave radio frequency signals to obtain modulated optical signals. It can convert millimeter-wave radio frequency signals, which are susceptible to spatial interference and have high transmission loss, into highly stable, low-loss optical transmission signals, thus avoiding signal attenuation and electromagnetic interference problems during long-distance transmission of millimeter-wave radio frequency signals from the signal source, laying a signal foundation for subsequent long-distance stable transmission. The optical fiber transmission link transmits the modulated optical signal to the receiver photoelectric conversion module. Utilizing the ultra-low transmission loss, strong anti-electromagnetic interference capability, and large transmission bandwidth characteristics of optical fiber transmission medium, it achieves long-distance, distortion-free, high-speed, and stable transmission of modulated optical signals, overcoming the technical bottlenecks of limited distance and poor transmission quality in traditional millimeter-wave radio frequency wireless transmission. The receiving end photoelectric conversion module is used to demodulate the modulated optical signal to obtain the restored millimeter-wave radio frequency signal. It can accurately restore the original millimeter-wave radio frequency signal, ensuring signal demodulation integrity and fidelity, and guaranteeing that the parameters and performance of the millimeter-wave radio frequency signal before and after transmission are unbiased, meeting the signal usage requirements after long-distance transmission. This application, through a complete link design of photoelectric conversion, fiber optic transmission, and photoelectric demodulation, completely solves the defects of traditional millimeter-wave radio frequency signal long-distance transmission, such as high loss, susceptibility to electromagnetic interference, severe signal distortion, and limited transmission distance. It significantly improves the stability, fidelity, and transmission efficiency of millimeter-wave radio frequency signal long-distance transmission, expanding the long-distance application scenarios of millimeter-wave radio frequency technology. At the same time, the link structure is simple, and the signal conversion and transmission continuity is strong, ensuring the reliability and practicality of the overall transmission system. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A structural principle framework diagram of a radio frequency millimeter-wave photoelectric conversion component suitable for long-distance transmission is provided in one embodiment of this application; Figure 2 This is a schematic diagram of the internal structure of a transmitter photoelectric conversion module provided in an embodiment of this application; Figure 3 This is a schematic diagram of the internal structure of a receiver photoelectric conversion module provided in an embodiment of this application. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] This application relates to an optoelectronic conversion component capable of long-distance, low-loss, and high-fidelity transmission of millimeter-wave signals. It is primarily suitable for long-distance networking transmission scenarios of high-frequency signals, such as 6G mobile communication, millimeter-wave precision detection equipment, aerospace RF telemetry and control, and distributed RF systems, falling within the scope of RF optoelectronic integrated device technology. This component abandons the traditional method of assembling discrete components, employing an integrated packaging design of a dedicated millimeter-wave high-frequency optoelectronic conversion chip, signal conditioning chip, and voltage regulation and protection chip. This significantly reduces component size and wiring space, improves overall structural compactness and operational stability, and meets the requirements for miniaturized equipment assembly.

[0040] The purpose of this application is to overcome the shortcomings of existing technologies, such as high transmission loss and poor signal stability of millimeter-wave cables over long distances, and the inability of conventional optoelectronic devices to adapt to high-frequency millimeter-wave signals. This application provides a radio frequency millimeter-wave optoelectronic conversion component suitable for long-distance transmission. By constructing a bidirectional optoelectronic conversion integrated architecture adapted to the high-frequency characteristics of millimeter waves, this application achieves high-precision conversion between millimeter-wave electrical and optical signals. Relying on optical fiber media, it completes long-distance signal transmission, fundamentally reducing the transmission loss of millimeter-wave signals over long distances and ensuring the integrity, stability, and fidelity of signal transmission. Simultaneously, through standardized interface design and integrated protection structure, it improves the compatibility of the component with existing radio frequency systems, reduces equipment modification and wiring costs, and adapts to the long-distance transmission conditions of various civilian and military millimeter-wave radio frequency equipment.

[0041] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] In one exemplary embodiment, such as Figure 1 As shown, a radio frequency millimeter-wave photoelectric conversion component suitable for long-distance transmission is provided. The component includes: a transmitter photoelectric conversion module (radio frequency to optical transmitter component in the figure), an optical fiber transmission link, and a receiver photoelectric conversion module (radio frequency to optical receiver component in the figure).

[0043] The transmitter photoelectric conversion module is used to convert millimeter-wave radio frequency signals to obtain modulated optical signals.

[0044] The optical fiber transmission link is used to transmit the modulated optical signal to the receiving end photoelectric conversion module.

[0045] The receiving end photoelectric conversion module is used to demodulate the modulated optical signal to obtain the restored millimeter-wave radio frequency signal.

[0046] As an optional implementation method, such as Figure 2 As shown, the transmitter photoelectric conversion module integrates a millimeter-wave RF input connector, a high-frequency signal preprocessing unit, a millimeter-wave electro-optical conversion chip, and a high-precision optical transmission interface in sequence along the signal transmission direction.

[0047] The millimeter-wave RF input connector adopts an industry-standard high-frequency connector, which can be seamlessly plugged into existing front-end millimeter-wave signal transmitting equipment to achieve stable access of high-frequency electrical signals and eliminate signal reflection and loss caused by interface adaptation. The high-frequency signal preprocessing unit integrates a 50Ω precision impedance matching circuit, a high-frequency noise filtering circuit, and a signal compensation amplification circuit. It is specifically optimized for the transmission characteristics of millimeter-wave high-frequency signals, which can accurately calibrate the transmission impedance, filter out environmental electromagnetic noise and high-frequency interference, and perform appropriate amplitude compensation for the weak millimeter-wave signal to ensure that the signal waveform of the input conversion chip is distortion-free, the amplitude is stable, and the signal-to-noise ratio is excellent. The millimeter-wave electro-optic conversion chip is a core dedicated device that can be adapted to 26GHz-40GHz high-frequency broadband signals. It modulates the preprocessed millimeter-wave RF signal into the corresponding optical signal in real time and with high precision, completing the high-frequency electro-optic signal conversion. The high-precision optical transmission interface is precisely connected to the optical fiber transmission link to stably output the modulated optical signal to the optical fiber and realize long-distance transmission.

[0048] As an optional implementation, the transmitter photoelectric conversion module further includes: The first embedded voltage regulator unit is used to output a constant operating voltage, suppress voltage interference caused by power grid fluctuations and equipment start-up and shutdown, and ensure the long-term stable operation of the core chip and circuit.

[0049] The first electrostatic discharge protection unit is used to release static electricity generated during assembly and operation in real time, preventing high-voltage electrostatic discharge from damaging high-frequency precision chips.

[0050] As an optional implementation, the transmitter photoelectric conversion module is externally equipped with an integrated metal shielding shell, which completely isolates external high-frequency electromagnetic radiation and radio frequency crosstalk, further improving the transmission stability and anti-interference capability of millimeter-wave high-frequency signals from a hardware perspective.

[0051] As an optional implementation, the optical fiber transmission link uses single-mode ultra-low loss optical fiber as the optical signal transmission medium. It is optimized for the broadband transmission characteristics of millimeter-wave modulated optical signals, exhibiting extremely low transmission loss, wide broadband coverage, and resistance to electromagnetic crosstalk and radiation interference. It can stably support distortion-free transmission over distances from hundreds to thousands of meters, completely avoiding the high-frequency conductor loss, dielectric loss, and radiation loss of traditional coaxial cables. Simultaneously, the optical fiber is flexible, lightweight, and corrosion-resistant, making it suitable for complex cabling scenarios involving complex cabinets, cross-device operations, and cross-regional operations, demonstrating excellent engineering adaptability.

[0052] As an optional implementation method, such as Figure 3 As shown, the receiving end photoelectric conversion module integrates a high-precision optical receiving interface, a millimeter-wave photoelectric conversion chip, a signal restoration and conditioning unit, and a millimeter-wave radio frequency output connector in sequence along the signal transmission direction.

[0053] A high-precision optical receiver interface is used to acquire modulated optical signals transmitted through optical fibers in real time, ensuring the integrity and stability of the optical signal access. The millimeter-wave photoelectric conversion chip can demodulate the high-frequency modulated optical signal at high speed and with high precision, restoring the original millimeter-wave high-frequency electrical signal with the original frequency, waveform, and amplitude, thus completing the high-precision conversion between optical and electrical signals. The signal restoration and conditioning unit integrates waveform shaping circuits, loss compensation amplification circuits, secondary filtering, and impedance calibration circuits. It performs waveform shaping, amplitude restoration, residual noise filtering, and impedance calibration on the demodulated electrical signal with slight distortion and small attenuation, thoroughly compensating for the slight loss during optical fiber transmission and ensuring that the output electrical signal is completely consistent with the original input signal parameters at the front end. Finally, the optimized and restored millimeter-wave RF signal is transmitted to the back-end RF system through a standardized millimeter-wave RF output connector, completing the complete long-distance signal transmission process.

[0054] As an optional implementation, the receiving end photoelectric conversion module further includes: The second embedded voltage regulator unit is used to output a constant operating voltage and suppress voltage interference caused by power grid fluctuations and equipment start-up and shutdown.

[0055] The second electrostatic discharge protection unit is used to discharge static electricity.

[0056] As an optional implementation, the receiver photoelectric conversion module is externally equipped with an integrated metal shielding shell, which completely isolates external high-frequency electromagnetic radiation and radio frequency crosstalk, further improving the transmission stability and anti-interference capability of millimeter-wave high-frequency signals from a hardware perspective.

[0057] In summary, the transmitter and receiver photoelectric conversion modules achieve high-precision photoelectric conversion through multi-level high-frequency signal conditioning circuits and dedicated millimeter-wave photoelectric chips. Relying on the low-loss characteristics of optical fibers, they achieve long-distance high-fidelity transmission of millimeter-wave signals. The coordinated operation of each functional unit ensures the stability, accuracy, and integrity of high-frequency signal transmission.

[0058] Compared to existing traditional millimeter-wave cable transmission solutions and conventional optoelectronic conversion devices, this application has advantages in multiple dimensions, including structure, performance, and adaptability, as detailed below: 1. Fundamentally solves the problem of transmission loss over millimeter wavelength distances, significantly extending transmission distance: This application breaks through the high-frequency loss transmission mechanism of traditional cables and adopts a dedicated optoelectronic conversion architecture for millimeter waves to convert high-frequency electrical signals into optical signals for transmission. The transmission loss of optical fiber is much lower than that of coaxial cable, and the transmission loss at the hundred-meter level can be controlled within 0.5dB, which is more than 95% lower than that of traditional cables. This completely solves the problem of signal attenuation failure in long-distance transmission of traditional solutions, extending the effective transmission distance of millimeter waves from the traditional ten-meter level to the hundred-meter and kilometer level, filling the technical gap in ultra-long-distance high-fidelity transmission of millimeter waves.

[0059] 2. High fidelity of high-frequency signal transmission and outstanding anti-interference performance: In view of the characteristics of millimeter-wave high-frequency signals being easily distorted and susceptible to interference, this application designs a multi-stage high-frequency signal preprocessing and back-end waveform restoration and conditioning circuit. Combined with the electromagnetic interference-free transmission characteristics of optical fiber and a fully enclosed shielding structure, it can effectively filter various high-frequency noise, electromagnetic crosstalk and environmental interference, ensuring that the millimeter-wave signal waveform is complete, the parameters are accurate and the signal-to-noise ratio is excellent after long-distance transmission, which greatly improves the working reliability and detection accuracy of the RF system.

[0060] 3. Highly integrated and lightweight design with strong engineering practicality: This application adopts a chip-integrated packaging structure, eliminating bulky long-distance coaxial cables. The components are small in size, lightweight, and easy to wire, greatly reducing the wiring load and assembly difficulty of the equipment. Both ends use standardized millimeter-wave interfaces, which can be directly compatible with various existing millimeter-wave RF complete systems without modifying the original equipment structure and circuit. It has wide adaptability, low modification cost, and can be quickly deployed in various engineering scenarios.

[0061] 4. It is compatible with short-distance and long-distance transmission requirements under all working conditions, breaking through the limitation of traditional transmission solutions with only one working condition adaptability.

[0062] 5. High stability, low maintenance cost, and long service life: The fiber optic transmission medium has the characteristics of corrosion resistance, aging resistance, bending resistance, and no conductor oxidation loss. Combined with the integrated protection structure of voltage stabilization, electrostatic discharge and electromagnetic shielding built into the components, it can work stably for a long time in complex electromagnetic and temperature change environments. The equipment failure rate is extremely low. Compared with traditional millimeter wave cables, the service life is greatly extended, and the maintenance and replacement costs are significantly reduced.

[0063] In one exemplary embodiment, the provided radio frequency millimeter-wave photoelectric conversion component is adapted to the 26GHz~145GHz millimeter-wave operating frequency band and can be applied to 5G / 6G millimeter-wave communication equipment, high-precision millimeter-wave detection radar, and remote radio frequency measurement and control system, with a maximum stable transmission distance of up to 200m.

[0064] The specific assembly method and working principle are as follows: 1. Equipment Assembly and Connection: Connect the millimeter-wave RF input connector of the transmitter's optoelectronic conversion module to the RF output port of the front-end millimeter-wave signal transmitting equipment. Connect the millimeter-wave RF output connector of the receiver's optoelectronic conversion module to the signal input port of the back-end RF receiver system. Connect the transmitter's optical transmitting interface and the receiver's optical receiving interface with ultra-low loss single-mode optical fiber to complete the wiring and assembly of the entire set of components. Connect the power supply lines of the components to ensure that the voltage regulation and protection unit works normally.

[0065] 2. Electro-optical transmission process: After the millimeter-wave high-frequency electrical signal output from the front-end equipment is connected to the transmitter module, it first enters the high-frequency signal preprocessing unit. The signal reflection loss is eliminated by a precise 50Ω impedance matching circuit, and environmental electromagnetic interference and noise are filtered out by a high-frequency noise filtering circuit. Then, the signal amplitude is compensated by a signal compensation amplification circuit, outputting a pure, stable, and distortion-free millimeter-wave electrical signal. Subsequently, the stable high-frequency electrical signal is input to a millimeter-wave dedicated electro-optical conversion chip. The chip modulates the corresponding optical signal in real time according to the frequency and amplitude variation of the electrical signal, completing a high-precision electro-optical conversion. Finally, the modulated optical signal is input into a single-mode optical fiber through an optical fiber interface for long-distance, low-loss transmission.

[0066] 3. Optical-to-Electrical Reception and Restoration Process: The modulated optical signal transmitted via optical fiber is stably transmitted to the photoelectric conversion module at the receiving end. The high-precision optical receiving interface completely acquires the optical signal and transmits it to the millimeter-wave photoelectric conversion chip. The millimeter-wave photoelectric conversion chip performs high-speed demodulation on the high-frequency modulated optical signal, initially restoring the original millimeter-wave electrical signal. The demodulated electrical signal enters the signal restoration and conditioning unit, where waveform shaping circuits repair the minor waveform distortions generated during transmission, loss compensation amplification circuits compensate for the minor transmission losses of the optical fiber, and secondary filtering of residual high-frequency noise and impedance calibration are performed to achieve accurate restoration of signal amplitude, waveform, and frequency. Finally, the millimeter-wave electrical signal with extremely high fidelity is transmitted to the back-end RF receiving system through the millimeter-wave RF output connector interface, completing the long-distance transmission operation.

[0067] 4. Stable operation with overall protection: Throughout the entire operation process, the built-in embedded voltage regulator unit continuously outputs a constant working voltage to avoid chip malfunctions and signal distortion caused by voltage fluctuations; the electrostatic discharge protection unit releases electrostatic charges in real time to protect high-frequency precision chips; the external integrated metal shielding shell isolates external electromagnetic radiation and radio frequency crosstalk in all directions, ensuring long-term stable operation of components in complex electromagnetic environments.

[0068] Verified through multiple sets of working conditions: Under a standard transmission distance of 100m, the millimeter-wave signal transmission loss of this embodiment is ≤0.5dB, which is significantly improved compared to the transmission loss of more than 15dB of traditional millimeter-wave coaxial cables, with a signal-to-noise ratio improvement of more than 40%. Under ultra-long-distance transmission conditions of 200m, there is no signal loss, no obvious distortion, and the loss is controllable, fully meeting the working indicators and usage requirements of high-precision millimeter-wave complete system.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A radio frequency millimeter-wave photoelectric conversion component suitable for long-distance transmission, characterized in that, include: Transmitter photoelectric conversion module, optical fiber transmission link, and receiver photoelectric conversion module; The transmitter photoelectric conversion module is used to convert millimeter-wave radio frequency signals to obtain modulated optical signals; The optical fiber transmission link is used to transmit the modulated optical signal to the receiving end photoelectric conversion module; The receiving end photoelectric conversion module is used to demodulate the modulated optical signal to obtain the restored millimeter-wave radio frequency signal.

2. The radio frequency millimeter-wave photoelectric conversion component suitable for long-distance transmission according to claim 1, characterized in that, The transmitter photoelectric conversion module includes: a millimeter-wave radio frequency input connector, a high-frequency signal preprocessing unit, a millimeter-wave electro-optic conversion chip, and a high-precision optical emission interface; The millimeter-wave radio frequency input connector is seamlessly plugged into and disconnected with the front-end millimeter-wave signal transmitting equipment to enable the access of millimeter-wave radio frequency signals. The high-frequency signal preprocessing unit is used to preprocess the millimeter-wave radio frequency signal to obtain a preprocessed millimeter-wave radio frequency signal. The millimeter-wave electro-optic conversion chip is used to modulate the preprocessed millimeter-wave radio frequency signal to obtain a modulated optical signal. The high-precision optical transmission interface is connected to the optical fiber transmission link and is used to output the modulated optical signal to the optical fiber transmission link.

3. The radio frequency millimeter-wave photoelectric conversion component suitable for long-distance transmission according to claim 2, characterized in that, The high-frequency signal preprocessing unit includes: Impedance matching circuit is used to calibrate the transmission impedance of the millimeter-wave radio frequency signal to obtain the impedance-matched millimeter-wave radio frequency signal. A high-frequency noise filtering circuit is used to filter out environmental electromagnetic noise and high-frequency interference from the impedance-matched millimeter-wave radio frequency signal to obtain a millimeter-wave radio frequency signal with high-frequency noise filtered out. A signal compensation amplifier circuit is used to perform amplitude compensation on the millimeter-wave radio frequency signal after high-frequency noise filtering to obtain a pre-processed millimeter-wave radio frequency signal.

4. The radio frequency millimeter-wave photoelectric conversion component suitable for long-distance transmission according to claim 2, characterized in that, The transmitter photoelectric conversion module also includes: The first embedded voltage regulator unit is used to output a constant operating voltage and suppress voltage interference caused by power grid fluctuations and equipment start-up and shutdown. The first electrostatic discharge protection unit is used to discharge static electricity.

5. The radio frequency millimeter-wave photoelectric conversion component suitable for long-distance transmission according to claim 1, characterized in that, The transmitter photoelectric conversion module is externally shielded by an integrated metal housing to completely isolate external high-frequency electromagnetic radiation and radio frequency crosstalk.

6. The radio frequency millimeter-wave photoelectric conversion component suitable for long-distance transmission according to claim 1, characterized in that, The optical fiber transmission link is a single-mode optical fiber.

7. The radio frequency millimeter-wave photoelectric conversion component suitable for long-distance transmission according to claim 1, characterized in that, The receiving end photoelectric conversion module includes: a high-precision optical receiving interface, a millimeter-wave photoelectric conversion chip, a signal restoration and conditioning unit, and a millimeter-wave radio frequency output connector. The high-precision optical receiving interface is connected to the optical fiber transmission link and is used to output the modulated optical signal to the millimeter-wave photoelectric conversion chip. The millimeter-wave photoelectric conversion chip is used to demodulate the modulated optical signal to obtain a demodulated millimeter-wave radio frequency signal. The signal restoration and conditioning unit is used to condition the demodulated millimeter-wave radio frequency signal to obtain the restored millimeter-wave radio frequency signal. The millimeter-wave radio frequency output connector is connected to the back-end radio frequency system and is used to transmit the restored millimeter-wave radio frequency signal to the back-end radio frequency system.

8. The radio frequency millimeter-wave photoelectric conversion component suitable for long-distance transmission according to claim 7, characterized in that, The signal restoration and conditioning unit includes: A waveform shaping circuit is used to shape the demodulated millimeter-wave radio frequency signal to obtain a waveform-shaped millimeter-wave radio frequency signal. A loss-compensating amplifier circuit is used to restore the amplitude of the waveform-shaped millimeter-wave radio frequency signal to obtain an amplitude-restored millimeter-wave radio frequency signal. A secondary filtering circuit is used to filter residual noise from the amplitude-restored millimeter-wave radio frequency signal to obtain a filtered millimeter-wave radio frequency signal. An impedance calibration circuit is used to perform impedance calibration on the filtered millimeter-wave radio frequency signal to obtain the restored millimeter-wave radio frequency signal.

9. The radio frequency millimeter-wave photoelectric conversion component suitable for long-distance transmission according to claim 7, characterized in that, The receiving end photoelectric conversion module also includes: The second embedded voltage regulator unit is used to output a constant operating voltage and suppress voltage interference caused by power grid fluctuations and equipment start-up and shutdown. The second electrostatic discharge protection unit is used to discharge static electricity.

10. The radio frequency millimeter-wave photoelectric conversion component suitable for long-distance transmission according to claim 1, characterized in that, The receiver's photoelectric conversion module is externally shielded by an integrated metal housing to completely isolate external high-frequency electromagnetic radiation and radio frequency crosstalk.

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