Design and fabrication of mmic coupled lines coupler consisting of composite right/left-handed transmission lines

Coupled-line directional coupler based on CRLH (Composite Right/Left-Handed) cascaded structures is designed, analyzed and then fabricated. The technological realization of the coupler involves one mask process on silicon substrate, using CPWs (CoPlanar Waveguides). The preliminary measurements were also performed, showing that the experimental results fit well the simulation results