小型氢频标磁控管微波腔与空型腔性能的比较

A Comparison of the Properties of Magnetron Type Cavity and Empty Type Cavity in Small-scaled Hydrogen Maser

用Ansoft HFSS仿真软件建立了小型氢频标空型和磁控管型微波腔模型结构,仿真了2种不同微波腔的谐振频率、品质因数和电磁场结构.通过比较发现空型微波腔当加入壳电极后,腔体内电磁场分布被改变,使得腔体轴线附近磁场分布更加均匀,而电场则主要分布在微波腔壳电极缝隙区域.

The modes of magnetron type microwave cavity and empty type cavity in small-scaled hydrogen maser are established with Ansoft HFSS; the resonant frequencies,quality factors and electromagnetic field modes are simulated to the two different microwave cavities. By comparison,we find that the electromagnetic field structure of empty microwave cavity with electrodes is altered,and the magnetic field near the axis of magnetron type cavity is more homogeneous than that of empty type cavity,and the electric field of magnetron type cavity is mainly distributed in electrode gaps.