engleski

Complex Conical Beams for Aperture Field Representations

This paper discusses a novel method for computing aperture radiated fields by means of conical beams with azimuthal phase variation. These new beams are generated in a natural way starting from the spectral-domain radiation integral, by expanding the electric field spectrum in the aperture plane in a Fourier series, and by approximating the obtained Fourier series coefficients by a sum of complex exponentials using the Generalised Pencil-of-Function method. This transforms the radiation integral to a simpler form which can be evaluated analytically. Two types of wave objects are derived, both of them arising from the same spectral GPOF process, but that possess different properties. Aperture fields obtained via the new approach are successfully compared to those calculated via direct near field integration or asymptotic evaluation.

propagation; aperture antennas; beams; complex point sources

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