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Fast and accurate analysis for the directivity of circular‐shape antennas using optimal neural networks
Author(s) -
Silva P. H. da F.,
Passos M. G.,
d'Assunção A. G.
Publication year - 2007
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.22839
Subject(s) - directivity , bessel function , artificial neural network , ground plane , microwave , aperture (computer memory) , function (biology) , microstrip , mathematics , computer science , topology (electrical circuits) , mathematical analysis , electronic engineering , physics , acoustics , engineering , telecommunications , antenna (radio) , electrical engineering , artificial intelligence , evolutionary biology , biology
This article describes the application of the optimal transfer function neural network methodology for fast and accurate function approximation of Q‐integrals, that appears in directivity expressions of circular‐shape antennas, such as loop, microstrip patch, and aperture in an infinite ground plane. These directivity expressions were revisited and linked in terms of Q‐type power‐radiation integrals. For each directivity approach using optimal neural networks–closed‐form expressions, series of Bessel functions, and adaptive Lobatto integration, the numerical results are presented and discussed in terms of accuracy and computational cost. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2721–2726, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22839