Electrodynamic properties of semi-open objects with cavities and partitions

The Method of Auxiliary Sources (MAS) is implemented to solve the problem-of EM field diffraction upon an open metallic object such as a car body. The key idea of the MAS is to present the unknown scattered field by a superposition of fundamental solutions of the appropriate wave equation Auxiliary Sources (AS), whose radiating centers are located on some auxiliary surface, shifted outside the area, where the field is to be found. In the case of semi-open objects constructed by a thin metallic surface with cavities and partitions (like the car or other means of transportation), the imaginary surfaces covering the apertures presented in the investigated object are introduced to represent the separated domains that are applicable for the MAS algorithm. The efficiency of MAS is illustrated and some resonant properties of the described objects are investigated.