A multivariate approach to the calculation of field-field correlation matrices is used to estimate the number of uncorrelated positions in a mode-stirred reverberation chamber (RC) inspired by chaotic cavities. The growth of the number of independent stirrer configurations is found to increase more rapidly with frequency than in a conventional RC. This is ascribed to the regular geometry forming the baseline cavity (screened room) of an RC, responsible for localizing energy and preserving regular (bouncing ball) modes. Smooth wall deformations are introduced in order to create underlying wave dynamical instability and then destroy survived regular modes. Numerical full-wave simulations are performed for a reverberation chamber with corner hemispheres and wall spherical caps. Field sampling is performed by moving a mechanical “carousel” stirrer. It is found that a wave-chaotic RC has improved performances in terms of lowest usable frequencies and number of uncorrelated cavity realizations of mechanical stirrers.
A mechanical mode-stirred reverberation chamber inspired by chaotic cavities / Moglie, Franco; Gradoni, Gabriele; Bastianelli, Luca; MARIANI PRIMIANI, Valter. - ELETTRONICO. - (2015), pp. 437-441. (Intervento presentato al convegno 2015 IEEE Metrology for Aerospace (MetroAeroSpace) tenutosi a Benevento, Italy nel 4-5 June 2015) [10.1109/MetroAeroSpace.2015.7180697].
A mechanical mode-stirred reverberation chamber inspired by chaotic cavities
MOGLIE, FRANCO;GRADONI, GABRIELE;BASTIANELLI, LUCA;MARIANI PRIMIANI, Valter
2015-01-01
Abstract
A multivariate approach to the calculation of field-field correlation matrices is used to estimate the number of uncorrelated positions in a mode-stirred reverberation chamber (RC) inspired by chaotic cavities. The growth of the number of independent stirrer configurations is found to increase more rapidly with frequency than in a conventional RC. This is ascribed to the regular geometry forming the baseline cavity (screened room) of an RC, responsible for localizing energy and preserving regular (bouncing ball) modes. Smooth wall deformations are introduced in order to create underlying wave dynamical instability and then destroy survived regular modes. Numerical full-wave simulations are performed for a reverberation chamber with corner hemispheres and wall spherical caps. Field sampling is performed by moving a mechanical “carousel” stirrer. It is found that a wave-chaotic RC has improved performances in terms of lowest usable frequencies and number of uncorrelated cavity realizations of mechanical stirrers.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
