同轴传输线不连续性补偿尺寸的计算方法

Computation Method for Compensative Size of Coaxial Transmission Line Discontinuity

常用的空气介质同轴连接器使用介质支撑来保持内外导体之间的相对位置,介质支撑的引入,使内外导体发生突变,不仅改变了同轴传输线结构,还在介质支撑存在的地方引入了不连续性,因此必须引入本地补偿来抵消不连续性的影响。本文介绍了同轴传输线不连续性分类方法,采用并联电容来表征同轴传输线的不连续性,在传输线不连续性的地方引入高阻传输线来抵消不连续性的影响,提出了基于高阻传输线模型的补偿尺寸计算方法,推导了补偿结构的高阻传输线长度计算公式,最后给出编程计算、HFSS仿真以及实验结果。

The dielectric bead is put into coaxial connector to keep relative position between inner and outer conductors. The inner and outer conductors of coaxial transmission line must be change suddenly,because the dielectric bead is introduced,not only changing the structure of coaxial transmission line,but also introducing coaxial transmission line discontinuity. The local compensation can eliminate the influence of discontinuity. The categorizing method of coaxial transmission line discontinity is introduced. The parallel capacitance is used to representative the discontinuity of coaxial transmission line. The high impedance transmission line is inserted in the position of befelling discontinuity to eliminates the influence of discontinuity. The computation method of compensative size is introduced,and the computation formula of compensative size is deduced. The computation results of discontinuity compensative size and HFSS are comparatively analyzed,The Coaxial connector is made,it have reached the level of precision coaxial connector.