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Pseudo-Isotropic Source for Anechoic Chamber Qualification



Perry F. Wilson, John M. Ladbury, Galen H. Koepke


A pseudo-isotropic source is presented. The source consists of an electrically-large cavity with internal excitation (horn antenna), a variable internal boundary condition (a rotating paddle as in a reverberation chamber), and randomly placed apertures for external radiation. On average, the radiation pattern approaches that of an isotropic source. Data are presented for a non-optimized box realization showing +/- 3 dB isotropy over typical planar cuts. Simulation suggest that better than +/- 2 dB should be possible.
Conference Dates
August 19-23, 2002
Conference Location
Minneapolis, MN, USA
Conference Title
2002 Intl. EMC Symp.


isotropic radiator, reverberation chamber, anechoic chamber


Wilson, P. , Ladbury, J. and Koepke, G. (2002), Pseudo-Isotropic Source for Anechoic Chamber Qualification, 2002 Intl. EMC Symp., Minneapolis, MN, USA (Accessed December 11, 2023)
Created August 18, 2002, Updated October 12, 2021