A complete description of a source-type method for modeling planar structures

A source-type method is developed with a view to model microstrip planar circuits. A complete study is made. It allows us to put in a prominent position the arbitrary nature of the source, which is defined on the metal plane. The presence of a coupling two-port network, whose role is fundamental for solving the problem, is demonstrated too. Extended wavelet trial functions are used for modeling the current density in the circuit. This theory is illustrated with results giving the modulus of the transmission coefficient for some elementary discontinuities.