Capacitance calculation for transmission line filled withpiecewise homogeneous dielectric using boundary element method

Boundary element method(BEM) is presented as a new approach for the analysis and design of various transmission lines filled with piecewise homogeneous dielectric. The solution of the boundary-value problem associated with transmission lines filled with piecewise homogeneous dielectric is transformed into a matrix formula of BEM. The procedure to obtain the capacitance is described. Two representative computational examples, eccentric coaxial cable partially filled with dielectric and transmission line of parallel dielectric-coated cylinders, are given to validate the theory, and to demonstrate the accuracy and flexibility of BEM.