Abstract
We report the ultracompact multiway power splitters based on the phononic crystal with a triangular lattice. Such power splitters can effectively divide ultrasonic energy into multiple channels (n≥2) and output them. The arrow-shaped and star-shaped power splitters were separately discussed in detail based on the finite element method (FEM) as examples. The phononic bandgap in the triangular lattice arrangement and dispersive curves of a single phononic waveguide were analyzed, respectively. Also, the displacement field distribution and transmission efficiency of these outputs were calculated to evaluate the efficiency of the splitters. The results indicate that these splitters possess novel and promising properties, including ultracompact, high-efficiency, and large bandwidth. The perturbations analysis of the power splitter proves that it has good mechanical stability. It is to be expected that these ultracompact splitters will present practical applications in future acoustic wave circuits.
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