FULL-WAVE ANALYSIS OF A SHIELDED MICROSTRIP T-JUNCTION

A rigorous full-wave analysis is employed to analyze a shielded micros trip T-junction. A method of moments technique is employed on the T-ju nction apertures of microstrip lines. A multi-step Green's function ap proach is employed to determine the integral equations related to aper ture fields. In this context the Green's function of the T-junction en closed inside a shielded microstrip is determined by applying semi-ana lytic techniques. The scattering parameters of the T-junction are comp uted for various cases and are presented for a wide range of frequenci es. The importance of shielding box modes is investigated.