CN-121984535-A - Device and method for stable phase transmission of radio frequency signals

CN121984535ACN 121984535 ACN121984535 ACN 121984535ACN-121984535-A

Abstract

The invention discloses a device and a method for transmitting a stable phase of a radio frequency signal, wherein the device for transmitting the stable phase of the radio frequency signal comprises a reference source, a client and a controller, wherein the reference source comprises an optical reference source and a radio frequency reference source, the client comprises a voltage-controlled phase shifter, a phase discriminator and a controller, the voltage-controlled phase shifter regulates a radio frequency synchronous signal to obtain a regulated radio frequency signal, the phase discriminator obtains an error signal according to a pulse laser synchronous signal and the regulated radio frequency signal, the controller obtains a control voltage according to the error signal and controls the voltage-controlled phase shifter based on the control voltage so that the voltage-controlled phase shifter regulates the radio frequency synchronous signal, and thus the radio frequency signal after phase locking is output. The phase drift generated in the transmission process of the radio frequency signal can be reflected to the error signal, and the radio frequency signal after phase locking can be obtained through negative feedback control of the controller, so that the radio frequency signal after phase locking and the pulse laser synchronous signal maintain a phase synchronization relationship.

Inventors

YE HAN
ZHAO HE
Ding Junsong
CHEN ZHICHAO
WU GUORONG

Assignees

深圳先进光源研究院

Dates

Publication Date: 20260505
Application Date: 20260116

Claims (10)

1. An apparatus for phase-stable transmission of radio frequency signals, comprising: A reference source comprising an optical reference source and a radio frequency reference source, the optical reference source and the radio frequency reference source being in a synchronized state, the optical reference source being configured to distribute a pulsed laser synchronization signal, the radio frequency reference source being configured to distribute a radio frequency synchronization signal; The client comprises a voltage-controlled phase shifter, a phase discriminator and a controller, wherein the voltage-controlled phase shifter is configured to regulate the radio frequency synchronous signal to obtain a regulated radio frequency signal, the phase discriminator is configured to obtain an error signal according to the pulse laser synchronous signal and the regulated radio frequency signal, and the controller is configured to obtain a control voltage according to the error signal and control the voltage-controlled phase shifter based on the control voltage so that the voltage-controlled phase shifter regulates the radio frequency synchronous signal to output a phase-locked radio frequency signal.
2. The apparatus for stable phase transmission of radio frequency signals according to claim 1, wherein the radio frequency reference source is a radio frequency master oscillator, and wherein the radio frequency master oscillator is connected to the voltage controlled phase shifter through a radio frequency transmission link.
3. The apparatus of claim 1, wherein the optical reference source is a reference laser, and wherein the reference laser is coupled to the phase detector via a phase-stabilized fiber link.
4. The apparatus for stable phase transmission of radio frequency signals according to claim 1, wherein the phase detector comprises: An electro-optic phase action unit configured to cause an electro-optic phase modulation action of phase-correlating the pulsed laser synchronization signal with the adjusted radio frequency signal; A balance detector configured to output an error signal indicative of a relative phase deviation between the pulsed laser synchronization signal and the radio frequency signal.
5. The apparatus for stable phase transmission of radio frequency signals according to any one of claims 1 to 4, wherein the client further comprises: and the radio frequency output and distribution module is configured to distribute the radio frequency signals after phase locking into multiple paths of radio frequency outputs.
6. The apparatus for stable phase transmission of radio frequency signals according to any one of claims 1 to 4, wherein the client further comprises: And the monitoring and control interface module is configured to detect the error signal, the control voltage and a locking state parameter, wherein the locking state parameter is used for representing the locking state between the pulse laser synchronous signal and the adjusted radio frequency signal.
7. The stable phase transmission method of the radio frequency signal is characterized by comprising the following steps: Acquiring a pulse laser synchronous signal distributed by an optical reference source and a radio frequency synchronous signal distributed by a radio frequency reference source, wherein the optical reference source and the radio frequency reference source are in a synchronous state; Based on the voltage-controlled phase shifter, the radio frequency synchronous signal is regulated to obtain a regulated radio frequency signal; Based on a phase discriminator, obtaining an error signal according to the pulse laser synchronous signal and the adjusted radio frequency signal; And obtaining control voltage according to the error signal, and controlling the voltage-controlled phase shifter based on the control voltage so as to regulate the radio frequency synchronous signal and output a radio frequency signal after phase locking.
8. The method according to claim 7, wherein the error signal is a signal in which a phase difference between the pulse laser synchronization signal and the adjusted radio frequency signal is changed, and the control voltage is determined according to an amplitude and a trend of the error signal.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method for stable phase transmission of radio frequency signals according to any one of claims 7-8.
10. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor performs the steps of the method for stable phase transmission of radio frequency signals according to any of claims 7 to 8.

Description

Device and method for stable phase transmission of radio frequency signals Technical Field The invention relates to the technical field of time synchronization, in particular to a device and a method for stable phase transmission of radio frequency signals. Background With the development of large scientific facilities such as free electron lasers (Free Electron Laser, FEL), synchrotron radiation devices and large-scale telescope arrays, strict time synchronization between a plurality of systems is kept in picoseconds or even femtoseconds, and the development of large-scale scientific facilities has become a key technical foundation for ensuring stable operation and experimental precision of the devices. A radio frequency master oscillator (RF Master Oscillator, RMO) is typically provided in the device to provide a radio frequency synchronization reference, while an optical master oscillator (Optical Master Oscillator, OMO) is configured to generate pulsed laser synchronization signals and distribute over kilometer distances via fiber stabilized phase transmission links to maintain very low jitter and drift over long distance transmissions. Therefore, how to distribute the radio frequency synchronization signal to each subsystem with high precision on the premise of fully utilizing the advantages of the phase-stabilized optical fiber link, so as to realize the phase-locked synchronization among the subsystems, becomes a key technical problem to be solved. In the prior art, synchronization signals generated by the RMO are directly distributed to each client through a radio frequency coaxial cable. The mode structure is the simplest, but long-distance coaxial cables are extremely sensitive to temperature change and mechanical disturbance, the radio frequency phase drift is large, and the requirements of FEL and other devices on long-term stability and ultra-high synchronization precision are difficult to meet. In order to reduce the temperature drift of the coaxial cable, the coaxial cable is placed in a constant temperature pipeline to form a constant temperature and phase stabilization link. The mode can obviously reduce the phase drift caused by the change of the ambient temperature, but a huge temperature control structure is needed to be provided for a longer coaxial link, the engineering implementation is complex, the cost is high, the passive suppression is realized, and the compensation capability for sudden disturbance and residual drift is limited. Accordingly, there is a need for improvement and development in the art. Disclosure of Invention The invention aims to solve the technical problem that the prior art has the defects, provides a device and a method for stable phase transmission of radio frequency signals, and aims to solve the problem that the transmission of the radio frequency signals in the prior art has phase drift to cause asynchronism. The technical scheme adopted for solving the technical problems is as follows: An apparatus for phase-stabilized transmission of radio frequency signals, comprising: A reference source comprising an optical reference source and a radio frequency reference source, the optical reference source and the radio frequency reference source being in a synchronized state, the optical reference source being configured to distribute a pulsed laser synchronization signal, the radio frequency reference source being configured to distribute a radio frequency synchronization signal; The client comprises a voltage-controlled phase shifter, a phase discriminator and a controller, wherein the voltage-controlled phase shifter is configured to regulate the radio frequency synchronous signal to obtain a regulated radio frequency signal, the phase discriminator is configured to obtain an error signal according to the pulse laser synchronous signal and the regulated radio frequency signal, and the controller is configured to obtain a control voltage according to the error signal and control the voltage-controlled phase shifter based on the control voltage so that the voltage-controlled phase shifter regulates the radio frequency synchronous signal to output a phase-locked radio frequency signal. The device for transmitting the stable phase of the radio frequency signal comprises a radio frequency reference source, a voltage-controlled phase shifter and a radio frequency reference source, wherein the radio frequency reference source adopts a radio frequency master oscillator, and the radio frequency master oscillator is connected with the voltage-controlled phase shifter through a radio frequency transmission link. The device for transmitting the stable phase of the radio frequency signal comprises an optical reference source, a reference laser and a phase discriminator, wherein the reference laser is connected with the phase discriminator through a stable phase optical fiber link. The device for transmitting the stable phase of the radio frequency signal comprises: An electro