横电磁传输室理论与技术的若干问题

Some Problems on the Theory and Technology of the TEM Transmission Cell

横电磁传输室(TEM cell)由于其全封闭式结构,不会污染环境或影响操作人员的健康,因而比敞开式带状线测试室优越。从内部场分布看,扁结构(矩形截横面)优于方结构(方形横截面)。电磁场数值解法(先求导积分方程然后化为矩阵代数方程)不仅对传统结构有效,而且可用来计算一些可想象的新结构。文中给出了作者针对小型室和中型室进行大量测试得到的实验结果。并据此导出了最高可用频率(UUFL)的经验公式。最后,提出了在今后研究工作中应优先解决的问题。

The TEM transmission cell can't pollute the ambient or do harm to the operator's health for its enclosed -structure, so it is better than the stripline test cell. From the point of view of the field distributi- on inside the cell, the rectangular transverse section is better than the squ- are transverse section. The EM-field numerical solution using the integral equation and the algebraic equations is prosented, and this method can be used to calculate some new structures. In this paper, a lot of experimental re- sults are given, which gained from the small cell and the middle cell, and then the useful upper frequency limit experimental equation is derived. At last, the problems of this branch which must be solved in fulture resear- ches are advanced.