Title :
Higher-order moment-method modeling of curved metallic antennas and scatterers
Author :
Djordjevic, M. ; Notaros, B.M.
Author_Institution :
Univ. of Massachusetts Dartmouth, North Dartmouth, MA, USA
Abstract :
We propose a MoM technique using generalized curved parametric quadrilaterals of arbitrary geometrical order. In the new technique, the geometrical surface elements in the model can be both electrically large, with higher-order basis functions for current modeling, and curved. With this, the large-domain current-modeling efficiency is preserved even for surfaces with pronounced curvature (such as a sphere or a cylinder). The geometrical orders of the quadrilateral elements are entirely independent from the current-approximation orders of the basis functions, and the two sets of parameters of the higher-order model can be adopted at will for the best overall performance of the method. Numerical examples showing the efficiency and accuracy of the new technique are a metallic spherical scatterer, analyzed using four different higher-order models, and an antenna system consisting of two wire monopoles attached to a metallic cylinder.
Keywords :
antenna theory; computational electromagnetics; electromagnetic wave scattering; interpolation; iterative methods; method of moments; monopole antennas; polynomials; wire antennas; Lagrange-type polynomials; arbitrary geometrical order; divergence-conforming polynomials; generalized curved parametric quadrilaterals; geometrical surface elements; higher-order basis functions; interpolation nodes; iterative method; large-domain current-modeling efficiency; metallic antennas; metallic scatterers; method of moments analysis; spherical scatterer; wire monopoles; Chebyshev approximation; Costs; Interpolation; Lagrangian functions; Message-oriented middleware; Moment methods; Polynomials; Scattering; Solid modeling; Wire;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1220129