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Multi-channeled filtering properties are found in the sandwich structure composed of two ε-negative layers with dielectric permittivity described by Drude model separated by another normal material layer. Epsilon-negative metamaterials are successfully realized by using composite right/left-handed transmission line, based on which the Fabry–Perot (FP) cavity was also constituted. The single resonant mode is split into some discrete resonant peaks, leading to the multi-channeled filtering phenomenon through the several coupled FP cavity resonators. In comparison with the conventional multichanneled filters, the proposed structure is more compact and tunable. The microwave experiment results are found in agreement with simulation results.