Abstract
A balanced transmission line consisting of two arc-shaped thick conductors and shielded by a circular pipe is solved for the Transverse Electromagnetic (TEM) mode by an efficient moment method in which the basis functions contain the exact behavior of the electric field at the right-angle wedges. It is shown that in most cases two expansion functions are sufficient for an excellent convergence of the solution. The dependance of the characteristic impedance upon the geometric parameters is calculated and presented graphically. We also present the convergence plots of the solution, compared to a conventional moment method, in which the basis functions do not contain the edge singularity of the electric field. It is shown that using the effective moment method can significantly improve the convergence rate of the solution.
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