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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.
The design procedure and the numerical analysis of a coupler consisting of two coupled artificial CRLH transmission lines, is presented. For the CRLH cell, a PI structure is used in order to increase the operating frequency, compare to the value obtained by using a T structure, as a results of the smaller value for the series capacitance, then a higher resonant frequency may be obtained. The influence...
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