Remote multi-antenna broadband signal synthesis device and system based on all-optical link

Abstract

The invention discloses a remote multi-antenna broadband signal synthesis device and system based on an all-optical link, and belongs to the field of broadband signal synthesis, the remote multi-antenna broadband signal synthesis device comprises a remote station and a central station, and signal transmission is performed between the remote station and the central station through a long optical fiber link; an all-optical signal processing link is adopted, high-performance local oscillation signals are generated at a far-end station through the photo-generated microwave technology, signal processing such as broadband down-conversion, time delay alignment and stable-phase transmission of multi-antenna receiving signals is achieved, and after the signals are transmitted through a long optical fiber link, coherent combination is achieved at a central station through optical beam forming. The method is suitable for related application scenes needing to receive Gbps-level broadband signals in different places, and has the advantages of being large in synthesis bandwidth and flexible in deployment.

Description

Technical Field

[0001] The present invention relates to the field of broadband signal synthesis, and more specifically to a remote multi-antenna broadband signal synthesis device and system based on an all-optical link. Background Art

[0002] With the rapid development of my country's aerospace technology, deep space exploration missions have expanded from lunar exploration to Mars and other more distant targets. However, deep space communications face two major challenges: high transmission path loss in deep space, and limited equivalent omnidirectional transmit power of the probes. These factors severely impact ground-based signal reception and processing. Furthermore, to meet the high-definition image transmission requirements of future manned deep space exploration missions, signal bandwidth and transmission rates must be further increased. To this end, ground stations typically increase the aperture of parabolic antennas to improve the signal-to-noise ratio. However, as the antenna aperture increases, the signal beam narrows, making signal capture more difficult. Furthermore, large-aperture antennas, due to their bulky size and weight, approach their limits in machining precision and are economically expensive. In contrast, antenna arraying technology, which combines multiple small-aperture antennas remotely to create the equivalent of a single large-aperture antenna, offers advantages such as scalability, flexibility, reliability, and low cost, and has become a research hotspot in the global aerospace field.

[0003] Research institutions at home and abroad have also conducted numerous prototype developments and satellite-based demonstrations of deep-space antenna arrays. This approach involves sampling the signals received by each antenna and transmitting them to a central station's signal processing equipment for delay compensation and phase adjustment, achieving signal coherence and synthesis. However, this approach is limited by the processing bandwidth of microwave devices, making it incapable of meeting future Gbps-level signal reception requirements. Furthermore, centralized processing of multiple signals results in significant transmission link losses, making effective synthesis difficult in the low signal-to-noise ratio (SNR) environment of deep space. Therefore, research is needed on new technologies for deep-space arrays that both enhance wide-bandwidth synthesis capabilities and achieve cost-effective implementation. Microwave-photonic hybrid communication systems can fully combine the advantages of laser links—large bandwidth, wide connectivity, and low loss—with the flexible signal access capabilities of traditional microwaves. This approach overcomes the electronic bottlenecks of traditional microwave technology in parallel processing and transmission bandwidth, significantly improving the transmission and processing capabilities of high-frequency, high-capacity communication signals in space tracking and control communication systems. This represents a new trend in the future development of space tracking and control communications and offers new approaches and new approaches for the design of antenna array receiving systems. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a remote multi-antenna broadband signal synthesis device and system based on an all-optical link. This device and system solves the problems of small synthesized signal bandwidth and difficulty in transmitting from remote stations to the central station in existing antenna array systems based on microwave links. It is particularly suitable for deep space receiving antenna arrays and radio astronomy array-related application scenarios, and has the advantages of large synthesis bandwidth and flexible deployment.

[0005] The object of the present invention is achieved through the following solutions:

[0006] A remote multi-antenna broadband signal synthesis device based on an all-optical link, comprising:

[0007] Long optical fiber links are used for signal transmission between remote stations and central stations;

[0008] The remote station includes a remote station antenna, an optical down-conversion electro-optical conversion link, a dual-polarization optical oscillation transmission link, an optoelectronic oscillation loop, a remote station wavelength division multiplexer, an optical circulator, a remote station optoelectronic conversion processing link, a variable optical delay line, and an optical delay line control module;

[0009] The central station includes a central station wavelength division multiplexer, an optical reflector, and a central station photoelectric conversion processing link;

[0010] The remote station antenna receives the broadband signal, modulates it in an optical down-conversion electro-optical conversion link, and outputs a down-converted broadband modulated optical signal. The dual-polarization optical oscillation transmission link generates two optical signals with orthogonal polarizations. One path passes through an optoelectronic oscillation loop to produce a highly stable oscillation signal, while the other path uses the oscillation signal to modulate the optical carrier to generate a reference modulated optical signal. The reference modulated optical signal and the broadband modulated optical signal are then transmitted to the central station through the remote station wavelength division multiplexer, optical circulator, variable optical delay line, and long optical fiber link.

[0011] The optical signal arriving at the central station undergoes wavelength division multiplexing. The reference modulated optical signal passes through an optical reflector and returns to the optoelectronic conversion processing link of the remote station to generate an RF signal. The signal is then frequency- and phase-detected with the oscillation signal output by the optoelectronic oscillation loop through the optical delay line control module, and feedback is used to adjust the delay of the variable optical delay line to achieve delay jitter compensation and delay alignment. The broadband modulated optical signal passes through the optoelectronic conversion processing link of the central station at the central station, and outputs the broadband array RF signal after the alignment delay, completing the coherent combination reception of the multi-antenna array.

[0012] Furthermore, the optical down-conversion electro-optical conversion link includes a signal laser and an electro-optical modulator;

[0013] a signal laser for generating a continuous optical carrier signal having an operating wavelength different from that of the reference laser;

[0014] The electro-optical modulator is used to modulate the signal laser onto the antenna broadband signal and the highly stable local oscillator signal output by the optoelectronic oscillation loop, and output a down-converted optical signal that has undergone multi-level intensity modulation.

[0015] Furthermore, the dual-polarization light oscillation transmission link includes a reference laser, a dual-polarization dual-parallel electro-optical modulator, a polarizer and an analyzer;

[0016] A reference laser is used to generate a continuous optical carrier signal having the same central wavelength as the wavelength division multiplexer and wavelength demultiplexer;

[0017] The dual-polarization dual-parallel electro-optical modulator is used to split the optical carrier output by the reference laser into two orthogonally polarized optical signals, modulate the highly stable local oscillator signal output by the photoelectric oscillation loop, and then combine them into one output reference modulated optical signal;

[0018] A polarizer, used to split the optical signal output by the dual-polarization dual-parallel electro-optical modulator into two orthogonal polarization optical signals;

[0019] Polarization analyzer, used to selectively pass optical signals of selected polarization states.

[0020] Furthermore, the optoelectronic oscillation loop includes a photodetector, a low-noise amplifier, a microwave bandpass filter and a microwave power divider;

[0021] a photodetector for converting a reference modulated optical signal into a radio frequency signal;

[0022] A low-noise amplifier, used to amplify the radio frequency signal output by the photodetector;

[0023] Microwave bandpass filter, used for frequency selection and filtering of the amplified RF signal;

[0024] Microwave power splitter is used to split the radio frequency signal into multiple equal power signal outputs.

[0025] Furthermore, the photoelectric conversion processing link includes an optical amplifier, an optical bandpass filter and a photodetector;

[0026] Optical amplifier, used to amplify the power of optical signals;

[0027] Optical bandpass filter, used to select the frequency of the amplified optical signal and filter out some of the spontaneous emission noise of the optical amplifier;

[0028] Photodetector, used to convert the filtered optical signal into a radio frequency signal.

[0029] A remote multi-antenna broadband signal synthesis system based on an all-optical link comprises the remote multi-antenna broadband signal synthesis device based on an all-optical link as described in any one of the above items.

[0030] The beneficial effects of the present invention include:

[0031] The present invention proposes a remote multi-antenna broadband signal synthesis device, which uses signal processing such as signal frequency conversion, optical microwave generation, delay alignment and phase-stable transmission based on an all-optical link. It effectively breaks through the technical bottlenecks of limited bandwidth and high transmission loss of traditional microwave radio frequency links through microwave photonic technology, greatly improving the synthetic bandwidth of the antenna array, and can achieve flexible access to antennas at different locations with low transmission loss, significantly enhancing the deployment flexibility and scalability of the system.

[0032] This invention solves the problem of efficient array coherent combining of signals received by high-speed, high-bandwidth antennas. The device utilizes an all-optical signal processing link, generating high-performance local oscillator signals at remote sites using optically generated microwave technology. It also implements signal processing such as broadband down-conversion, time-delay alignment, and phase-stable transmission for multi-antenna received signals. After transmission over a long optical fiber link, the signals are coherently combined at the central site using optical beamforming.

[0033] The present invention is suitable for related application scenarios requiring remote reception of Gbps-level broadband signals, such as deep space receiving antenna arrays and radio astronomy array scenarios, and has the advantages of large synthetic bandwidth and flexible deployment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 Schematic diagram of the structure of the device according to the embodiment of the present invention. DETAILED DESCRIPTION

[0036] All features disclosed in all embodiments in this specification, or steps in all methods or processes implicitly disclosed, except for mutually exclusive features and / or steps, can be combined and / or expanded or replaced in any manner.

[0037] The specific implementation process of the present invention is as follows:

[0038] like Figure 1As shown, all equipment in a remote multi-antenna broadband signal synthesis device based on an all-optical link is distributed between a remote station and a central station. Signals are transmitted between the remote and central stations using a long optical fiber link. The remote station includes a remote station antenna, an optical down-conversion electro-optical conversion link, a dual-polarization optical oscillation transmission link, an optoelectronic oscillation loop, a remote station wavelength division multiplexer (WDM), an optical circulator, an optoelectronic conversion processing link, a variable optical delay line, and an optical delay line control module. The central station includes a central station wavelength division multiplexer (WDM), an optical reflector, and an optoelectronic conversion processing link. The remote station antenna receives the broadband signal, modulates it in an optical down-conversion electro-optical conversion link, and outputs a down-converted broadband modulated optical signal. The dual-polarization optical oscillation transmission link generates two orthogonally polarized optical signals. One path passes through an optoelectronic oscillation loop to generate a highly stable oscillation signal, while the other path uses the oscillation signal to modulate the optical carrier to generate a reference modulated optical signal. The reference modulated optical signal and the broadband modulated optical signal are transmitted to the central station through the remote station wavelength division multiplexer, optical circulator, variable optical delay line, and long optical fiber link. The optical signal arriving at the central station undergoes wavelength division multiplexing. The reference modulated optical signal passes through an optical reflector and returns to the remote optoelectronic conversion processing link to generate an RF signal. The reference modulated optical signal then undergoes frequency and phase discrimination with the oscillation signal output by the optoelectronic oscillation loop through the optical delay line control module, and feedback is used to adjust the delay of the variable optical delay line to achieve delay jitter compensation and delay alignment. At the central station, the broadband modulated optical signal passes through the central station optoelectronic conversion processing link, outputting a broadband array RF signal with aligned delay, completing multi-antenna array reception.

[0039] The optical down-conversion electro-optical conversion link includes: a signal laser for generating a continuous optical carrier signal with a wavelength different from that of the reference laser; an electro-optical modulator for modulating the signal laser onto the antenna broadband signal and the highly stable local oscillator signal output by the optoelectronic oscillator loop. The output down-converted broadband modulated optical signal is shown in Formula 1. Here, c is the speed of light in a vacuum, λ1 is the optical carrier wavelength of the signal laser; β1 is the modulation depth of the antenna received signal, which is determined by the strength of the received signal; ω s represents the carrier frequency of the received signal; θ(t) represents the modulation phase of the received signal; ω LO Represents the frequency of the local oscillator signal generated by the optoelectronic oscillation loop; θ LO (t) represents the phase of the remote station local oscillator signal.

[0040]

[0041] The dual-polarization optical oscillation transmission link includes: a reference laser for generating a continuous optical carrier signal consistent with the center wavelength of the wavelength division multiplexer and the wavelength division multiplexer; a dual-polarization dual-parallel electro-optical modulator for dividing the optical carrier output of the reference laser into two orthogonally polarized optical signals, modulating the highly stable local oscillator signal output by the upper photoelectric oscillator loop, and then combining them into a reference modulated optical signal output; a polarizer for dividing the optical signal output by the dual-polarization dual-parallel electro-optical modulator into two orthogonally polarized optical signals. A polarizer is used to selectively pass optical signals in a specific polarization state. The reference modulated optical signal generated by the dual-polarization optical oscillation transmission link is used to obtain the delay jitter of a long optical fiber link, as shown in Formula 2. Wherein, λ0 is the optical carrier wavelength of the reference laser; β2 is the modulation depth of the local oscillator signal in the dual-polarization dual-parallel electro-optical modulator.

[0042]

[0043] The optoelectronic oscillation loop includes: a photodetector for converting a reference modulated optical signal into a radio frequency signal; a low-noise amplifier for amplifying the radio frequency signal output by the photodetector; a microwave bandpass filter for frequency-selective filtering of the amplified radio frequency signal; and a microwave power splitter for dividing the radio frequency signal into multiple equal-power signal outputs.

[0044] The optoelectronic conversion processing link includes: an optical amplifier for amplifying the power of the optical signal; an optical bandpass filter for frequency selection of the amplified optical signal to filter out some of the spontaneous radiation noise of the optical amplifier; and a photodetector for converting the filtered optical signal into a radio frequency signal. The reference modulated optical signal is transmitted from the remote site to the central site, then returns to the optical circulator at the remote site via the optical reflector at the central site, and then passes through the optoelectronic conversion processing link to generate the radio frequency signal shown in Formula 3. Where, τ com It represents the delay change generated by the variable optical delay line control module after frequency and phase discrimination; τ link Indicates the delay jitter of a long optical fiber link.

[0045] V a (t)∝cos[ω LO (t+τ com +τ link )+θ LO (t)](3);

[0046] Combining Formula 1 and Formula 3, it can be seen that the broadband modulated optical signals after down-conversion from N antennas arrive at the central station and undergo wavelength division multiplexing to form the optical beamforming signal shown in Formula 4.

[0047]

[0048] At N remote sites, the delay τ of the variable optical delay line is adjusted by the optical delay line control module.com When Formula 5 is satisfied, the phase jitter of the local oscillator signal and the link delay jitter in the link can be eliminated. The phase quantity in Formula 4 only retains the modulation phase of the downlink signal received by the antenna, ultimately achieving coherent synthesis of multi-antenna arrays in different locations.

[0049]

[0050] After synthesis, the signal-to-noise ratio of the antenna downlink broadband signal can be improved by 10logN (dB) compared to the received signal, thereby effectively improving the signal-to-noise ratio of the deep space spacecraft broadband signal received by the ground station, reducing the bit error rate and demodulation threshold of the measurement and control system, and increasing the system data transmission rate.

[0051] In summary, the present invention adopts an all-optical link system based on microwave photonic technology. First, it can use a long optical fiber link with a loss coefficient of 0.2dB / km to realize signal transmission from each antenna to the central station, effectively reducing link insertion loss. Secondly, it adopts an optical oscillation loop and an optical down-conversion link to directly generate a highly stable local oscillator signal that can be used for down-conversion, realizing high-performance broadband frequency conversion of the signal. Finally, it introduces a variable optical fiber delay line to dynamically adjust the transmission delay of each link, ensuring the delay synchronization of all signals and correcting delay fluctuations caused by environmental factors, thereby realizing accurate synthesis of array signals.

[0052] It should be noted that within the scope of protection defined in the claims of the present invention, the following embodiments can be combined and / or expanded or replaced in any logical way from the above specific implementation methods, such as disclosed technical principles, disclosed technical features or implicitly disclosed technical features.

[0053] Example 1

[0054] A remote multi-antenna broadband signal synthesis device based on an all-optical link, comprising:

[0055] Long optical fiber links are used for signal transmission between remote stations and central stations;

[0056] The remote station includes a remote station antenna, an optical down-conversion electro-optical conversion link, a dual-polarization optical oscillation transmission link, an optoelectronic oscillation loop, a remote station wavelength division multiplexer, an optical circulator, a remote station optoelectronic conversion processing link, a variable optical delay line, and an optical delay line control module;

[0057] The central station includes a central station wavelength division multiplexer, an optical reflector, and a central station photoelectric conversion processing link;

[0058] The remote station antenna receives the broadband signal, modulates it in an optical down-conversion electro-optical conversion link, and outputs a down-converted broadband modulated optical signal. The dual-polarization optical oscillation transmission link generates two optical signals with orthogonal polarizations. One path passes through an optoelectronic oscillation loop to produce a highly stable oscillation signal, while the other path uses the oscillation signal to modulate the optical carrier to generate a reference modulated optical signal. The reference modulated optical signal and the broadband modulated optical signal are then transmitted to the central station through the remote station wavelength division multiplexer, optical circulator, variable optical delay line, and long optical fiber link.

[0059] The optical signal arriving at the central station undergoes wavelength division multiplexing. The reference modulated optical signal passes through an optical reflector and returns to the optoelectronic conversion processing link of the remote station to generate an RF signal. The signal is then frequency- and phase-detected with the oscillation signal output by the optoelectronic oscillation loop through the optical delay line control module, and feedback is used to adjust the delay of the variable optical delay line to achieve delay jitter compensation and delay alignment. The broadband modulated optical signal passes through the optoelectronic conversion processing link of the central station at the central station, and outputs the broadband array RF signal after the alignment delay, completing the coherent combination reception of the multi-antenna array.

[0060] Example 2

[0061] Based on Example 1, the optical down-conversion electro-optical conversion link includes a signal laser and an electro-optical modulator;

[0062] a signal laser for generating a continuous optical carrier signal having an operating wavelength different from that of the reference laser;

[0063] The electro-optical modulator is used to modulate the signal laser onto the antenna broadband signal and the highly stable local oscillator signal output by the optoelectronic oscillation loop, and output a down-converted optical signal that has undergone multi-level intensity modulation.

[0064] Example 3

[0065] Based on Example 1, the dual-polarization light oscillation transmission link includes a reference laser, a dual-polarization dual-parallel electro-optical modulator, a polarizer and an analyzer;

[0066] A reference laser is used to generate a continuous optical carrier signal having the same central wavelength as the wavelength division multiplexer and wavelength demultiplexer;

[0067] The dual-polarization dual-parallel electro-optical modulator is used to split the optical carrier output by the reference laser into two orthogonally polarized optical signals, modulate the highly stable local oscillator signal output by the photoelectric oscillation loop, and then combine them into one output reference modulated optical signal;

[0068] A polarizer, used to split the optical signal output by the dual-polarization dual-parallel electro-optical modulator into two orthogonal polarization optical signals;

[0069] Polarization analyzer, used to selectively pass optical signals of selected polarization states.

[0070] Example 4

[0071] On the basis of Example 1, the optoelectronic oscillation loop includes a photodetector, a low-noise amplifier, a microwave bandpass filter, and a microwave power divider;

[0072] a photodetector for converting a reference modulated optical signal into a radio frequency signal;

[0073] A low-noise amplifier, used to amplify the radio frequency signal output by the photodetector;

[0074] Microwave bandpass filter, used for frequency selection and filtering of the amplified RF signal;

[0075] Microwave power splitter is used to split the radio frequency signal into multiple equal power signal outputs.

[0076] Example 5

[0077] Based on Example 1, the photoelectric conversion processing link includes an optical amplifier, an optical bandpass filter and a photodetector;

[0078] Optical amplifier, used to amplify the power of optical signals;

[0079] Optical bandpass filter, used to select the frequency of the amplified optical signal and filter out some of the spontaneous emission noise of the optical amplifier;

[0080] Photodetector, used to convert the filtered optical signal into a radio frequency signal.

[0081] Example 6

[0082] A remote multi-antenna broadband signal synthesis system based on an all-optical link comprises the remote multi-antenna broadband signal synthesis device based on an all-optical link as described in any one of Embodiments 1 to 5.

[0083] The specific implementation of the present invention is not limited to the above-mentioned methods. The above description is only the preferred embodiment of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. It is obvious that various changes, adjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the principles and concepts of the present invention, it can also include more other equivalent embodiments, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A remote multi-antenna broadband signal synthesis device based on an all-optical link, characterized in that: include: Long optical fiber links are used for signal transmission between remote stations and central stations; The remote station includes a remote station antenna, an optical down-conversion electro-optical conversion link, a dual-polarization optical oscillation transmission link, an optoelectronic oscillation loop, a remote station wavelength division multiplexer, an optical circulator, a remote station optoelectronic conversion processing link, a variable optical delay line, and an optical delay line control module; The central station includes a central station wavelength division multiplexer, an optical reflector, and a central station photoelectric conversion processing link; The remote station antenna receives the broadband signal, modulates it in an optical down-conversion electro-optical conversion link, and outputs a down-converted broadband modulated optical signal. The dual-polarization optical oscillation transmission link generates two optical signals with orthogonal polarizations. One path passes through an optoelectronic oscillation loop to generate a highly stable oscillation signal, while the other path uses the oscillation signal to modulate the optical carrier to generate a reference modulated optical signal. The reference modulated optical signal and the broadband modulated optical signal are transmitted to the central station through the remote station wavelength division multiplexer, optical circulator, variable optical delay line, and long optical fiber link in sequence; The optical signal arriving at the central station undergoes wavelength division multiplexing. The reference modulated optical signal passes through an optical reflector and returns to the optoelectronic conversion processing link at the remote station, generating an RF signal. This signal is then frequency- and phase-decoded with the oscillation signal output by the optoelectronic oscillation loop via the optical delay line control module, which then feedback-adjusts the delay of the variable optical delay line, achieving delay jitter compensation and delay alignment. The broadband modulated optical signal passes through the optoelectronic conversion processing link at the central station, outputs the broadband array RF signal after alignment delay, and completes the coherent synthesis reception of the multi-antenna array.

2. The all-optical link-based remote multi-antenna broadband signal synthesis device according to claim 1, characterized in that: The optical down-conversion electro-optical conversion link includes a signal laser and an electro-optical modulator; a signal laser for generating a continuous optical carrier signal having an operating wavelength different from that of the reference laser; The electro-optical modulator is used to modulate the signal laser onto the antenna broadband signal and the highly stable local oscillator signal output by the optoelectronic oscillation loop, and output a down-converted optical signal that has undergone multi-level intensity modulation.

3. The remote multi-antenna broadband signal synthesis device based on an all-optical link according to claim 1, characterized in that: The dual-polarization light oscillation transmission link includes a reference laser, a dual-polarization dual-parallel electro-optical modulator, a polarizer and an analyzer; A reference laser is used to generate a continuous optical carrier signal having the same central wavelength as the wavelength division multiplexer and wavelength demultiplexer; The dual-polarization dual-parallel electro-optical modulator is used to split the optical carrier output by the reference laser into two orthogonally polarized optical signals, modulate the highly stable local oscillator signal output by the photoelectric oscillation loop, and then combine them into one output reference modulated optical signal; A polarizer, used to split the optical signal output by the dual-polarization dual-parallel electro-optical modulator into two orthogonal polarization optical signals; Polarization analyzer, used to selectively pass optical signals of selected polarization states.

4. The all-optical link-based remote multi-antenna broadband signal synthesis device according to claim 1, characterized in that: The photoelectric oscillation loop includes a photodetector, a low-noise amplifier, a microwave bandpass filter and a microwave power divider; a photodetector for converting a reference modulated optical signal into a radio frequency signal; A low-noise amplifier, used to amplify the radio frequency signal output by the photodetector; Microwave bandpass filter, used for frequency selection and filtering of the amplified RF signal; Microwave power splitter is used to split the radio frequency signal into multiple equal power signal outputs.

5. The remote multi-antenna broadband signal synthesis device based on an all-optical link according to claim 1, characterized in that: The photoelectric conversion processing link includes an optical amplifier, an optical bandpass filter and a photodetector; Optical amplifier, used to amplify the power of optical signals; Optical bandpass filter, used to select the frequency of the amplified optical signal and filter out some of the spontaneous emission noise of the optical amplifier; Photodetector, used to convert the filtered optical signal into a radio frequency signal.

6. A remote multi-antenna broadband signal synthesis system based on an all-optical link, characterized in that: The invention comprises the remote multi-antenna broadband signal synthesis device based on an all-optical link according to any one of claims 1 to 5.

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