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A coupler consisting of two coupled CPW CRLH TLs (CoPlanar Waveguide Composite Right/Left-Handed Transmission L ines) is designed and fabricated. Each CPW CRLH TL is a two cascaded cells of series CPW interdigital capacitors and parallel CPW stubs. The coupler was fabricated on high resistivity silicon substrate, using one mask technological process. The measurements performed on the coupler give evidence for an experimental frequency bandwidth from 10.5 GHz up to 13.5 GHz, in good agreement with the simulation results.

A coupled-line directional coupler consisting of CRLH (Composite Right/Left-Handed) cascaded cells, are numerically designed and analysed. The coupler was fabricated on silicon substrate involving one mask process, using CPW (CoPlanar Waveguide) transmission lines. The measured frequency bandwidth is from 10.5 GHz up to 13.5 GHz fitting well the simulation results.

A CPW (coplanar waveguide) 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. The measured frequency bandwidth is from 10.5 GHz up to 13.5 GHz fitting well the simulation results.