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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 multi-feed reverberation chamber expansion method based on mirror symmetry is proposed. The principle of mirror-symmetric expansion of reverberation chamber to improve the field performance of the working area is given. The single-reverberation chamber and the reverberation chamber model are numerically simulated and designed Three sets of simulation experiments were carried out to verify the feasibility of the mirror reverberation chamber to improve the performance of the working area from two aspects of field strength and field uniformity. The experimental results show that after the mirror symmetry combination of the single-sounding chamber is expanded, the field strength of the working area increases and the uniformity of the field is improved while the volume of the reverberation chamber and the working area are multiplied by a factor of several times. The volume expansion of the reverberation chamber Reduce the field strength and the homogeneity of the frequency field deteriorating contradictions; the same time through the transmitting antenna that is a small power amplifier synthesis method to solve the high field strength of the reverberation chamber to reduce the requirements of the power amplifier, thereby reducing the reverberation Room test costs.