In a reverberation chamber, the stirring efficiency of the source stir technique is very high. However, to apply the source stir, the configuration (position, orientation, or polarization) of the transmitting (Tx) antenna has to be changed every time in the stirring process. To solve this problem, we use a three-dimensional printed robotic arm to control the position and orientation of the Tx antenna; thus, the source stirring process can be performed automatically. The measurement results are validated and compared with that from mechanical stirrers. Figures of merit such as autocorrelation, average K-factor, and total scattering cross-section are presented. The statistical distribution is also verified by using Kolmogorov–Smirnov test. Results show that the source stir technique outperforms the mechanical stirring technique significantly.

中文翻译：

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使用机械臂的源搅拌混响室

在混响室中，源搅拌技术的搅拌效率非常高。但是，要应用源搅拌，每次搅拌过程中都必须更改发射 (Tx) 天线的配置（位置、方向或极化）。为了解决这个问题，我们使用了一个3D打印的机械臂来控制Tx天线的位置和方向；因此，源搅拌过程可以自动进行。测量结果得到验证并与机械搅拌器的结果进行比较。提供了诸如自相关、平均 K 因子和总散射截面等品质因数。统计分布也通过使用 Kolmogorov-Smirnov 检验来验证。结果表明，源搅拌技术明显优于机械搅拌技术。