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Numerical analysis of antenna by a surface patch modeling

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3 Author(s)
Analoui, M. ; Okayama Univ., Japan ; Tsuboi, H. ; Nakata, T.

A cylindrical dipole antenna is numerically analyzed by the moment method. The surface of the antenna is approximated by triangular patches and the electric field integral equation is used for direct calculation of the surface current distribution. Therefore, the cylinder antenna can be treated in open or closed boundary form. The current expansion functions and the testing functions of the electric field boundary condition are of the triangular type. The surface integrals are numerically solved by a 33-point Gaussian quadrature approximation. The current distribution on a flat plate illuminated by a plane wave and the input admittance of a hollow cylindrical dipole as the near field quantities has been investigated. The convergence of the input admittance against the number of the triangular patches is presented, and the admittance solution is compared with the thin-wire approximation and theoretical results. Finally the CPU time and memory storage size for different numbers of patches are presented. Rapid admittance convergence and few required unknowns per square wavelength are the advantages of surface patch modeling

Published in:

Magnetics, IEEE Transactions on  (Volume:26 ,  Issue: 2 )

Date of Publication:

Mar 1990

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