Frequency selective wave beaming in nonreciprocal acoustic phased arrays.

ABSTRACT: Acoustic phased arrays are capable of steering and focusing a beam of sound via selective coordination of the spatial distribution of phase angles between multiple sound emitters. Constrained by the principle of reciprocity, conventional phased arrays exhibit identical transmission and reception patterns which limit the scope of their operation. This work presents a controllable space-time acoustic phased array which breaks time-reversal symmetry, and enables phononic transition in both momentum and energy spaces. By leveraging a dynamic phase modulation, the proposed linear phased array is no longer bound by the acoustic reciprocity, and supports asymmetric transmission and reception patterns that can be tuned independently at multiple channels. A foundational framework is developed to ch

SUBMITTER: Adlakha R 

PROVIDER: S-EPMC7721751 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature