Piezoelectric metamaterials with LC shunt circuits have potential in acoustic wave attenuation and guiding. This type of metamaterial takes advantages of the electro-mechanical coupling and local resonance from LC circuit. A unit cell of the metamaterial consists of the host medium and a piezoelectric transducer attached onto the host plate, while an LC shunt circuit is connected to the transducer. In this research, we present theoretical modeling to analyze the piezoelectric metamaterial. The influences of electro-mechanical coupling and system parameters with respect to bandgap characteristics are presented. Moreover, the unique feature of such an electro-mechanical coupling system, the online tenability, is discussed and analyzed.

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