This article presents an improvement to IEEE 299.1 standard used to measure the shielding effectiveness (SE) of small‐sized metallic enclosures in a reverberation chamber. The shielding quality of radio‐frequency (RF) cables used for SE measurement significantly affects measurement accuracy, especially when metallic enclosures have a high level of SE. A new measurement parameter is introduced to represent a measurable range in which SE can be measured without being affected by the shielding quality of the RF cables. The proposed parameter can be effectively used for the IEEE 299.1‐based SE measurement method to improve measurement accuracy. In our experiments, the utilization of the proposed parameter confirms that the IEEE 299.1 method can measure SE of 87.5 dB up to 4 GHz. Furthermore, to reduce coupled noise through the antenna cable, three different methods are applied together during the shielding measurement of a high‐SE enclosure. Our experimental results show that these methods extend the measurable SE range up to 95 dB at frequencies below 4 GHz.

中文翻译：

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考虑到天线电缆的屏蔽质量，改进了小尺寸外壳的屏蔽测量

本文介绍了对IEEE 299.1标准的改进，该标准用于测量混响室内的小型金属外壳的屏蔽效果（SE）。用于SE测量的射频（RF）电缆的屏蔽质量会显着影响测量精度，尤其是在金属外壳具有较高SE水平的情况下。引入了一个新的测量参数，以表示可测量范围，在该范围内可以测量SE，而不受RF电缆的屏蔽质量的影响。所建议的参数可以有效地用于基于IEEE 299.1的SE测量方法，以提高测量精度。在我们的实验中，对建议参数的利用证实了IEEE 299.1方法可以在高达4 GHz的频率下测量87.5 dB的SE。此外，为了减少通过天线电缆的耦合噪声，在高SE外壳的屏蔽测量中，将三种不同的方法一起使用。我们的实验结果表明，这些方法在低于4 GHz的频率下将可测量的SE范围扩展到了95 dB。