多路射频信号传输光纤线路相位补偿技术

Phase Compensation Technology on Multi-Channel RF Signal Optical Fiber Transmission Line

介绍了多路射频信号光纤传输应用特点,针对天线阵接收的多路射频信号光纤传输过程中对射频信号相位稳定性指标的要求,设计使用一种相位高精度调节稳定可控的光纤线路相位补偿技术。通过发送基准信号到天线阵并回传,然后与本地基准信号进行相位比较,得到它们的相位差值,再控制传输线路中可调光延迟线的时间延迟量,补偿传输光纤的时延变化,实现多路射频信号光纤传输相位稳定性要求。经过搭建试验系统测试,结果表明光纤相位补偿技术可以有效补偿射频信号光纤传输过程中的光纤传输时延变化。

The application characteristics of multi-channel RF signal optical fiber transmission are introduced.Aiming at the requirements of the phase stability index of RF signals during the optical fiber transmission process of multi-channel RF signals the received by antenna array,aphase compensation technology of optical fiber line with high precision adjustable,stable and controllable phase is designed.By sending the reference signal to the antenna array and backtracking it,then comparing with the local reference signal phase to obtain their phase difference,and then controlling the time delay of dimmable optical delay line in transmission line to compensate for the delay variation of transmission optical fiber,the phase stability requirement of the multi-channel RF signal optical fiber transmission is realized.After testing in the experimental system,the result shows that the phase compensation technology on optical fiber can effectively compensate the optical fiber transmission delay variation during the transmission of RF signal.