针对现有电环形器带宽隔离度有限的技术瓶颈，基于微波光子技术，通过光路射频对消方法，得到了频率2 GHz~8 GHz，隔离度>35 dB的射频收发系统。相比传统电环形器，在多倍频程范围内将收发隔离度提升了近15 dB。文中详细论述了方案原理及实验结果，该成果可为同频率共天线射频同时收发系统提供新的解决方案。在连续波雷达性能提升、通信频谱资源扩展等领域具备重要应用价值。

Common circulator has narrow bandwidth and low isolation. For these bottlenecks, we made an ultra-wideband and high isolation TR module using microwave photonic technology. The results showed the isolation of this module was higher than 35 dB in the frequency range of 2 GHz~8 GHz. Furthermore, the isolation was 15 dB higher than conventional ferrite circulators in multiple octave bands. This paper reported the basic principle and the relative experiment in detail. This system could enable an RF system to simultaneously transmit and receive through a single antenna on the same frequency channel. These schemes and the results showed in this paper can be referenced in the researches on the enhancement of continuous wave radar, as well as communication channels.

TN958.94

国家“863”计划基金资助项目