An FFT-based signal identification approach for obtaining the propagation constants of the leakymodes in layeredmedia
نویسندگان
چکیده
We propose to find the propagation constants of modes in layered media by means of signal identification methods. To this effect we employ Cauchy’s theorem, conformal mapping and Fast Fourier Transform (FFT) techniques to generate relevant Hankel moments, afterwards to be processed with selected signal identification algorithms. The method, terminated by a few Newton steps, provides a batch of highly accurate roots in appropriate disks or half-disks. 2004 Elsevier GmbH. All rights reserved.
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