在实验基础上，本文给出圆波导锁式铁氧体变极化器的介质加载的研究结果．实验表明，在铁氧体环内适当加载介质，可明显提高器件的相移，而对插入损耗特性影响甚微．这一发现对改进器件性能，具有极大的实用价值 Based on the experiment, the paper gives the research results of the dielectric loading of the circular waveguide locking ferrite variator. Experiments show that the proper loading medium in the ferrite ring can significantly improve the phase shift of the device with little effect on the insertion loss characteristics. This discovery has great practical value for improving device performance