基于FDTD的混响室场均匀性仿真分析

FDTD Analysis on the Field Uniformity in a Reverberation Chamber

为了确定由中国传媒大学制作的小体积混响室的场均匀性工作区域,本文通过电磁仿真软件GEMS建立了实际混响室的三维电磁模型,采用并行FDTD方法对混响室内的场均匀性进行仿真分析,计算出划定工作区域的8个顶点的电场,再通过数据处理得到场的标准偏差。仿真结果表明,此次划定的测试区域满足IEC 61000-4-21中关于混响室场均匀性的判定标准。

In order to determine the work space of a small volume practical reverberation chamber which is produced by Communication University of China, a 3D electromagnetic model of the reverberation chamber is established using electromagnetic simulation software GEMS ,and analyzed the field uniformity of the reverberation chamber using parallel FDTD method, then calculated the electric field intensity in eight positions of the test space. At last the standard deviations of the electric field in the test spaces are yielded through data processing. The simulation result shows that the test space satisfies the criteria with regard to field uniformity in a reverberation chamber defined in IEC61000 -4 -21.