Orbital-angular-momentum-carrying wave scattering by the chaff clouds

This article studies the scattering of the orbital-angular-momentum (OAM) carrying wave by chaff clouds. The OAMcarrying wave (vortex wave) has different phase distribution and amplitude distribution from the plane wave, thus the scattering characteristics of vortex wave by chaff clouds need to be investigated. There are three aspects studied through analysis and numerical computation here, including the scattering by a single dipole, the transmitted wave through the chaff clouds, and the back-scattering by chaff clouds. The results show that the transmitted wave is not an ideal vortex wave any more after transmitting through the chaff clouds, but the information carried by vortex wave can more easily pass through the chaff cloud than plane wave. The reason is that the information is located on the azimuth-angle domain (OAM modes) besides the time domain and the frequency domain. So, the information can be detected by OAM-mode filtering. It may also be beneficial for the application of the vortex wave in chaff jamming.