基于相位共轭稳相方法研制微波频率传递系统, 简化传递系统光路, 实现光纤微波频率传递链路噪声的实时补偿, 完成50 km光纤9.2 GHz超稳微波频率传递实验.该系统采用模块化设计, 由微波参考信号生成模块、相位补偿模块、光纤传递模块组成.在实验室环境下经过9 d的连续测试, 结果表明, 自由运转时频率传递的稳定度(标准阿伦方差)为4.2E－13@1 s, 4.3E－14@1 d; 补偿后频率传递系统的稳定度达到5.8E－14@1 s, 1.9E－17@1 d.该系统能够满足百公里范围内的超稳微波原子钟频率传递需求.

Based on the method of phase conjugation stabilization, a real-time noise cancellation system was proposed. The system which is a modular structure, is composed of microwave reference signal generating, phase compensation and optical fiber transmission module. The experimental results of our ultra-stable 9.2 GHz frequency transfer via a 50 km fiber spool were shown. In 9 days laboratry measurement, the system exhibits frequency transfer stabilities (standard Allan deviation) of 4.2E－13@1s/4.3E－14@1day for freE－running and 5.8E－14@1s/1.9E－17@1day for noisE－compensated link. This system match the requirement of 100 km scale frequency transfer of ultra-stable microwave atomic clocks.