摘要
搅拌器是决定混响室场均匀性好坏的关键部件,而电场样本间的相关系数和归一化最大电场值又是衡量搅拌器效率高低的重要参数。通过采用有限元数值方法对混响室的电磁场分布进行仿真,并研究了采用不同回转半径的搅拌器时,混响室这两个参数的变化情况,结果发现,相对工作频率波长来说,高效率搅拌器的回转半径应该尽量大,但是当回转半径达到一定程度后,它对搅拌效率的改善变得不明显。
Stirrer is the key component of reverberation chamber and determines reverberation chamber＇s field uniformity. The correlation coefficient and normalized maximum E field value are important parameters to evaluate stirrers＇ efficiency. Adopting finite elements method （FEM）, this paper simulates the distribution of electromagnetic field in reverberation chamber, studied the parameters＇ changes for different rotating radius of the stirrers, and the results showed that the rotating radius should, as large as possible compared to the wave length of Working frequency, but, when it achieved to a certain extent, the stirring ratio is not obviously imoroved.
关键词
混响室
搅拌器
搅拌效率
相关系数
回转半径
reverberation chambe
stirre
stirring rati
correlation coefficien
rotating radius
