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Aperture excitation of electrically large, lossy cavities
1994 / IEEE
This item was taken from the IEEE Periodical ' Aperture excitation of electrically large, lossy cavities ' We present a theory based on power balance for aperture excitation of electrically large, lossy cavities. The theory yields expressions for shielding effectiveness, cavity Q, and cavity time constant. In shielding effectiveness calculations, the incident field can be either a single plane wave or a uniformly random field to model reverberation chamber or random field illumination. The Q theory includes wall loss, absorption by lossy objects within the cavity, aperture leakage, and power received by antennas within the cavity. Extensive measurements of shielding effectiveness, cavity Q, and cavity time constant were made on a rectangular cavity, and good agreement with theory was obtained for frequencies from 1 to 18 GHz.<
Electrically Large Lossy Cavities
Cavity Time Constant
Uniformly Random Field
Random Field Illumination
1 To 18 Ghz
Engineered Materials, Dielectrics And Plasmas
Fields, Waves And Electromagnetics
Reverberation Chamber Illumination