A Simple Technique for Optimizing the Implementation of the Aperture Theorem Based on Equivalence Principle
The electromagnetic characteristics of the aperture located on a PEC (Perfect Electric Conductor) cavity is an important and challenged research in CEM(Computational Electromagnetics) and practical applications. Researches have been done well when the aperture locates on a large flat surface. But the complex slots and apertures are still difficult to analyze, such as a thin long slot. Thin long slots present on different kinds of the structures, such as missiles, aircrafts, handset equipments, and computers. And, most of the surfaces are non-flat. Furthermore, the multiscale characteristic of the structure makes the modeling very difficult in such cases. It becomes an increasing interested research recently. A better result can be obtained by generating much more denser meshes. Because of the complexity of the algorithm and ill-posed matrix problem, It is not an optimized option. In order to get a better use of the aperture theorem in the multiscale problems, a separation technique is developed in this paper. By using readjustment of the equivalence electric and magnetic currents, a simplified model is proposed. Arbitrary shaped aperture can be very well handled through this method, especially the thin long slots.