Summary
URSI Commission B 2013 International Symposium on Electromagnetic Theory EMTS 2013
2013
Session Number:21PM2C
Session:
Number:21PM2C-01
Random coupling model for the radiation of irregular apertures
Gabriele Gradoni, Thomas M. Antonsen Jr., Steven Anlage, Edward Ott,
pp.272-275
Publication Date:2013/5/20
Online ISSN:2188-5079
DOI:10.34385/proc.30.21PM2C-01
Summary:
In this paper, we propose and investigate the radiation of chaotic apertures. It is assumed that an aperture is wide and its geometry is irregular enough to infer a random behavior of the tangential field, that is expanded in chaotic modes. Particular emphasis is devoted to the calculation of the free-space aperture admittance matrix, whose element average takes a simple closed-form expression. The radiation admittance matrix is found to be purely diagonal at relatively short-wavelength, and it exhibits unusual frequency behavior. The extreme scenario of a chaotic aperture radiating inside a chaotic cavity is analyzed by the random coupling model. Transmitted power distribution is generated in various loss conditions, upon oblique plane-wave excitation of the aperture. It is found that cavity loss and number of aperture modes influence symmetry and fluctuation law of the transmitted power distribution. Obtained results offer a mathematical framework for the physical understanding of scattering in extremely complicated environments, mode-stirred reverberation chambers, wireless channels, radar traces, and statistical optics.