Field from apertures large in terms of wavelength, can be obtained via Kirchhoff approximation as a surface integral on physical optics currents, and corrected via fringe currents evaluation. If the aperture is very large in terms of wavelength, surface integral can be costly to compute, and formulas allowing its reduction to a line integral be more effective.
Radiation by an Aperture in a Planar Screen Illuminated by a Gaussian Beam at Optical Frequencies for Studying Baffle Scattering in Interferometric Detectors of Gravitational Waves / Pelosi, Giuseppe; Possenti, Leonardo; Selleri, Stefano; Pinto, Innocenzo M.. - ELETTRONICO. - (2018), pp. 2477-2478. (Intervento presentato al convegno 2018 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting, APSURSI 2018 tenutosi a The Westin Boston Waterfront, usa nel 2018) [10.1109/APUSNCURSINRSM.2018.8608942].
Radiation by an Aperture in a Planar Screen Illuminated by a Gaussian Beam at Optical Frequencies for Studying Baffle Scattering in Interferometric Detectors of Gravitational Waves
Pelosi, Giuseppe;Possenti, Leonardo;Selleri, Stefano;
2018
Abstract
Field from apertures large in terms of wavelength, can be obtained via Kirchhoff approximation as a surface integral on physical optics currents, and corrected via fringe currents evaluation. If the aperture is very large in terms of wavelength, surface integral can be costly to compute, and formulas allowing its reduction to a line integral be more effective.
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