The Reverberation Chamber's Unstirred Field: A Validation of the Image Theory Interpretation
Ryan J. Pirkl, John M. Ladbury, Catherine A. Remley
Synthetic aperture measurements of a reverberation chamber's unstirred wireless channel are used to compare the observed power, time-of-arrival, and angle-of-arrival of unstirred multipath components to that predicted by ray/image theory for a rectangular cavity. An examination of the ray paths corresponding to erroneously predicted unstirred multipath components revealed that these ray paths intersect the reverberation chamber's mode-stirring paddles, absorber blocks, and various other objects in the chamber. This inspired a simple image-blocking model for the reverberation chamber's unstirred wireless channel, whereby contributions from ray paths intersecting the chamber's mode-stirring paddles and absorbers are neglected. This model elucidates the unstirred wireless channel's geometry-based multipath structure, justifies established best practices for reverberation chamber measurements, and enables the development of more effective techniques for mitigating the reverberation chamber's unstirred field components.
, Ladbury, J.
and Remley, C.
The Reverberation Chamber's Unstirred Field: A Validation of the Image Theory Interpretation, 2011 IEEE Electromagnetic Compatability Symposium Digest, Long Beach, CA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=907962
(Accessed December 5, 2023)