GTEM小室放置被测物后的场分布

The field distribution of GTEM Cell after placing EUT

使用球坐标系下的 ＦＤＴＤ和球坐标系下 Ｍｕｒ型二阶吸收边界条件计算了ＯＴＥＭ小室中放置被测物后的场分布，分析了被测物对ＧＴＥＭ小室中电磁场的扰动情况。

The field distribution of GTEM Cell after placing an EUT is calculated in the paper with FDTD and Mur's second order Absorbing Boundary Conditions in spherical coordinates. The process of deriving Mur's second order Absorbing Boundary Conditions in spherical coordinates from its equations in generalized orthogonal coordinates is introduced. The calculating results of without EUT is the same compared with the results offered in other references. The disturbance to the field in GTEM Cell by EUT is analysed. And the results show that the electromagnetic field on the upper and below of the EUTs are both no longer synchronism.