The field radiated by a rectangular periodic array of dipoles (the Array Green's function) with weakly tapered excitation is derived and physically interpreted in terms of uniform high-frequency field contributions. The field, usually obtained by direct summation over the contributions from the individual radiators, is here reconstructed into a double spectral integral whose high frequency asymptotic reduction yields a series of propagating and evanescent Floquet Waves (FWs) together with corresponding FW-modulated diffracted fields, wihch arise from FW scattering at the array edges and vertex. Emphasis is given to the analysis and physical interpretation of the vertex diffracted rays. A sample calculation is included to demonstrate the accuracy of the asymptotic algorithm.

F., C., Maci, S., F., M., & L. B., F. (2001). Green's function for tapered planar arrays: a Floquet wave diffraction theory. ATTI DELLA FONDAZIONE GIORGIO RONCHI, LVI(4-5), 575-582.

Green's function for tapered planar arrays: a Floquet wave diffraction theory

MACI, STEFANO
;
2001

Abstract

The field radiated by a rectangular periodic array of dipoles (the Array Green's function) with weakly tapered excitation is derived and physically interpreted in terms of uniform high-frequency field contributions. The field, usually obtained by direct summation over the contributions from the individual radiators, is here reconstructed into a double spectral integral whose high frequency asymptotic reduction yields a series of propagating and evanescent Floquet Waves (FWs) together with corresponding FW-modulated diffracted fields, wihch arise from FW scattering at the array edges and vertex. Emphasis is given to the analysis and physical interpretation of the vertex diffracted rays. A sample calculation is included to demonstrate the accuracy of the asymptotic algorithm.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11365/404507