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Five types of surface integral equation (IE) formulations are presented to determine the characteristic modes of dielectric and magnetic bodies. It should be noted that these five formulations are derived in a unified manner. Instead of directly using the IE coefficient matrices of scattering problems, this paper presents the formulations in a more natural and rigorous way. The IE formulations result...
A method that combines cylindrical Green's functions with the method of moments using RWG basis functions is presented in this paper. Such method is specified to analyze and optimize antennas or antenna arrays conformal to layered cylindrical media. Its accuracy and high efficiency have been validated by comparing antenna simulation results with FEKO
A new singularity treatment technique of higher-order moment method is proposed to avoid the intensive computation of the Duffy transformation with Gaussian quadrature. We first transform the u-v coordinates of NURBS patch into the polar coordinates and approximate the NURBS expression in the polar coordinates through the expansion of the Bernstein polynomials with Taylor series. Then the singularity...
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