基于镜像对称的多馈源混响室扩展方法研究

Study of Extending Method Based on Mirror Symmetry for Reverberation Chamber

提出了基于镜像对称的多馈源混响室扩展方法,给出了镜像对称扩展混响室改善工作区域场性能的原理,对单混响室及镜像混响室模型进行数值模拟计算,并设计了3组仿真实验从场强大小和场均匀性两个方面验证镜像混响室改善工作区域场性能的可行性。实验结果表明:单混响室镜像对称组合扩展后,在成倍扩展混响室及工作区域体积的同时,工作区域场强增大,场均匀性有所提高,解决了混响室体积扩展与场强减小以及变频场均匀性恶化的矛盾;通过发射天线同时馈入相同功率即多个小功放合成的方法解决了混响室高场强问题,降低对功率放大器的要求,进而降低混响室的测试成本。

A method of extending reverberation chamber based on mirror symmetry is put forward,and the mechanism of improving field performance is analyzed.A single reverberation chamber and a symmetrical reverberation chamber are numerical calculated.In order to study the feasibility of this method,effects of mirror symmetry reverberation chamber on field performance of reverberation chamber including field strength and field uniformity are studied.The results show that mirror symmetry reverberation chamber extends working space,improves strength of electric field and field uniformity.The problem of high power amplifier is resolved using multiple antennas.