파수 영역의 방사 구면에서 음향 에너지 집중을 통한 평면파 생성 방법

Generation of a plane-wave field by point focusing of acoustic potential energy on the radiation sphere in the wavenumber domain

In the wavenumber domain, each point on a radiation sphere indicates a plane wave of the frequency corresponding to radius of the sphere and the position on the sphere shows propagating direction of the plane wave. This concept is extended from the research by Choi[1] where he focus acoustic potential energy at a point on a radiation sphere. Here we propose the method to focus the energy at a point on the radiation sphere, as a result, we can easily generate a plane wave which propagates to any direction that we want.