Frequency stirring method and field characteristics analysis in reverberation chamber

The theory of frequency stirred RC is illustrated from the perspective of eigenmodes. According to the frequency domain characteristics of the radiation signal, three effective frequency stirring approaches which can achieve real-time uniform and statistical uniform field environments are systematically researched. A linear sweep signal is selected as the major research object to perform a comprehensive test of the various technical index of frequency stirring RC, including the lowest usable frequency, filed uniformity and statistical properties. The test results prove that the lowest usable frequency in frequency stirring mode is consistent with mechanical stirring, the field uniformity satisfies the tolerance requirement in IEC 61000-4-21 standards, and the electric field obeys the theoretical distribution.