【摘要】 GTEMCell可以用较小的输入功率在内部建立均匀的电磁场 ,是理想的电磁兼容测试设备。为便于加工 ,以往的GTEMCell过渡接头中的斧形过渡块均采用近似设计 ,即在其宽度方向上采取直线过渡。这样做的结果是特性阻抗在GTEMCell过渡段的分布不理想 ,与标称值50Ω相差较大 ,妨碍了GTEMCell内行波状态的建议 ,降低了GTEMCell应有的良好性能。为对其进行修正 ,该文首次给出了精确的斧形过渡块侧边的连续曲线方程 ,对连续曲线方程进行了求解 ,并对曲线进行了描绘和比较。更多还原

【Abstract】 GTEMCell can be used to erect an even electromagnetic field within itself by a small input-power.It is a perfect testingequipmentforEMC.Tobe convenientformachining,the old pieces are approximatelydesigned.Butbytheoretical calculaˉtion and TDR measurements,it is proved that the traditional transition in a GTEMCell cannot give a satisfactory characteristic impedance distribution.Thatmeans its characteristic impedance distributionis muchdifferentfromthe nominal50Ωandthe matchˉing for the whole body is bad,which will deteriorate the establishment of fine traveling wave state in the GTEMCell.So this paˉper gives an exact continuous curve equation of the two sides of the axe-shaped piece’s for the first time.Finally the paper solves the continuous equation and describes and compares the curves.更多还原