关键词: 混响室, 小屏蔽体, 屏蔽效能, 虚拟仪器, 重复性

Abstract: Reverberation chamber (RC) can obtain high electric field intensity and broad dynamic range by low power, and RC has other unique advantages, such as wide usage, big working volume, fund-saving, and so on. RC measuring techniques have been received by international research fellows and standard organizations. Regarding to the shortage of standard testing methods for shielding effectiveness (SE) of small enclosure in RC, a new testing system based on the statistic definition and multi-points measurements of SE has been successfully designed and developed. The tests consequences indicate that this new system allows the tests at resonant frequencies,and the results can be counted and showed at real-time. The randomness of the tests result was reduced in wide range, the biggest deviation of the data in five different times is about 1dB, and the coefficient of variability is less than 0.032.

Key words: reverberation chamber, small enclosure, shielding effectiveness, virtual instrument, repetitiveness