镜像对称结构对多馈源混响室场性能的影响

Effects of Mirror Structure on Field Performance of Multi-feed Reverberation Chamber

为解决混响室大体积与场性能高要求之间的矛盾,提出了一种基于镜像原理的多馈源混响室的设计思想,从原理上分析了镜像多馈源混响室的可行性和有效性,并通过仿真计算研究了镜像双馈源混响室的场性能。结果表明,在输入功率一定时,两个单混响室系统组合成镜像双馈源混响室后,在工作区域的场均匀性能不下降的基础上,不但可用于电磁兼容测试的工作区域体积大幅度增大,而且测试区域的电场强度也得到了提高。同时,对镜像多馈源混响室进行了进一步的扩展分析,得出了组成镜像多馈源混响室的单混响室系统数量的理论表达式。

In order to solve the conflict between large volume and high field performance of reverberation chamber, a design thought of multi - feed reverberation chamber based on mirror theory is put forward. Feasibility and validity of multi - feed reverberation chamber is analysed in theory, and the field performance of dual - feed is simulated. The results show that under a certain power input, not only the testing volume for electromagnetic compatibility（EMC） test of the dual - feed reverberation chamber increases remarkably after two single reverberation chamber systems are combined, but the field strength of the working volume is also improved, with no decling of the field uniformity. At the same time, further expansion analysis is made for mirror multi - feed rever-beration chamber, and the theoretical expression of the number of single reverberation chamber that can be used to combine multi - feed reverberation chamber is obtained.