A full-wave analysis of the parasitic coupling between right-angle mitered bends microstrip discontinuities

A full-wave analysis of the parasitic coupling effects between right-angle mitered bends microstrip discontinuities is presented. The full-wave analysis is performed by means of the spectral domain approach (SDA) which allows to include the effects caused by the surface and volume waves excited by the discontinuity. Using the computed field quantities, the scattering parameters of the structure are obtained and used to derived an equivalent circuit suitable to model the dispersive effects and the parasitic coupling caused by the microstrip discontinuities. The analysis is carried out by varying the electrical and geometrical parameters that characterize the considered structures.