Design of dualband metamaterial bandpass filter using zeroth order resonance

This paper proposes the design method based on the composite right/left-handed (CRLH) structure to miniaturize and generate the dual-band characteristic. For realization, we used the zero-th order resonance point of the CRLH and the simple theory of Inverter. The proposed technique is validated by the performance predictions and experiments, and it is found out that the suggested method enables the huge size reduction from the conventional filters such as the parallel coupled type which was designed following the half-wavelength resonance.