A Model for Calculating Electromagnetic Scattering From Target in Evaporation Duct

In this letter, we proposed a new model to solve the scattering problem from target in evaporation duct. First, the traditional two-dimensional (2-D) subsection ray tracing (SRT) method is extended to 3-D case. Then the 3D SRT is used to obtain the propagation direction and attenuation of the transmitted electromagnetic wave from antenna. Second, shooting and bouncing rays (SBR) is used in the simulation of complex target scattering. Different from traditional SBR, the launched rays are not planed wave. A virtual transmitting plane is established to obtain the amplitude and direction of these rays in evaporation duct in front of the target. The transmitting plane in evaporation duct can be regard as the incident field of SBR method. What's more, the new model based on SBR is accelerated by CUDA and OptiX from Nvidia to deal with the tremendous number of rays. Finally, the scattering EM field and power distributions in evaporation duct environment are calculated and discussed in the last section.