1kW注入锁定连续波磁控管微波相干合成实验研究

Study on coherent power combining system of 1 kW CW inject-locking magnetrons

为满足工业应用大功率微波源的需求,开展了基于两路S波段1 k W注入锁定连续波磁控管的微波功率相干功率合成系统的实验研究。在理论上,分析了两路磁控管输出微波功率比和相位差对合成效率的影响。在实验中,用同步的微波源实现两路注入信号,采用磁控管注入锁定技术,通过虚拟仪器软件实现了自动化合成功率控制。实验成功进行了基于两路1 k W在S波段注入锁定连续波磁控管的相干功率合成。测试结果表明,两路S波段1 k W连续波磁控管的相干功率最高合成效率≥95%,为研究高效率的大功率合成微波源提供了重要的实验基础。

In order to satisfy the requirement of high power microwave sources in industrial applications,an experimental study on the coherent power combining system of two-way S-band injection-locked continuous wave（ CW）magnetrons were presented in this paper. The impacts of power ratio and phase differences on combining efficiency of the two magnetrons was analyzed theoretically. Coherent controlling of the two-way microwave sources was realized by a synchronized injection. Signals were injected in two ways with synchronous microwave sources,and magnetron injection locking was applied to the experiments. Automatic power combining control was achieved with virtual instrument software. The experiments of coherent power combining based on two-way 1kW S-band CW inject-locking magnetrons were performed. The test shows that two-way S-band 1kW CW magnetrons coherent power combining efficiency is equal or higher than 95%. The results provide an experimental basis for the power combining of high power microwave sources.