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采用三维粒子模拟,开展了2π工作模式下同轴辐射相对论磁控管的频率调谐研究.利用在互作用区的谐振腔中填充固体电介质来实现器件的频率调谐.通过改变电介质的相对介电常数以及内半径考察了所研究的同轴辐射相对论磁控管的工作频率、平均输出功率以及效率的变化情况,并对电介质的频率调谐作用进行了简单的理论分析.模拟结果表明:在不改变基本结构参数以及工作点的情况下,仅调整固体电介质的相对介电常数或内半径实现了所研究的同轴辐射相对论磁控管S波段到L波段的跨频段调谐;电介质的插入同时也改善了输出性能,当相对介电常数在6—15且内半径在4.18—4.40cm之间时,功率效率得到提升,提升幅度可达80%,单边调谐宽度小于55%.
The frequency tuning of the coaxial relativistic magnetron in 2π mode is studied by using three-dimensional particle simulation, and the frequency tuning of the device is achieved by filling the cavity in the interaction region with the resonant cavity. By changing the relative dielectric constant As well as the inner radius of the coaxial radiation relativistic magnetron work on the frequency, the average output power and efficiency changes, and the dielectric frequency tuning effect of a simple theoretical analysis.The simulation results show that: without changing the basic Structural parameters and operating points, only adjusting the relative dielectric constant or inner radius of the solid dielectric achieves cross-band tuning of the S-band to L-band of the coaxial relativistic magnetron under study; the insertion of the dielectric also improves Output performance, when the relative permittivity of 6-15 and the inner radius of 4.18-4.40cm, the power efficiency is improved, the improvement of up to 80%, unilateral tuning width of less than 55%.