Electromagnetic Coupling Field Multi-step Iterative Algorithm And Simulation

With the fast development of the electric information technology, the electric systems themselves and the electromagnetic environment have become more and more complex. Nowadays, the electromagnetic coupling of electric systems has become an interesting and hot issue in the area of electromagnetic compatibility. In order to play the task performance of electronic system under the complex electromagnetic environment, electronic system is usually required to be installed in the shutter. However, with the requirement of ventilation and heat dissipation, some tiny apertures are made on the surface of the shielding cavity which will cause the problem of aperture shielding. In this thesis, coupling analysis and computation of a rectangular cavity with apertures are studied based on the electromagnetic topology method. The main results are included as follows.Firstly, it Studies multi-step iterative algorithm based on topological theory of electromagnetic, proves the convergence of multi-step iterative algorithm with numerical analysis methods, and provides a theoretical basis for electromagnetic coupling of the aperture rectangular cavity model.Secondly, combining topological theory based on electromagnetic multi-step iterative algorithm, it establishes the electromagnetic interaction model of single aperture of cavity with time-harmonic sine wave irradiating, and applies CRIPTE software simulation to verify the theoretical reliability.Then, combining topological theory based on electromagnetic multi-step iterative algorithm, it establishes the electromagnetic interaction model of double apertures of cavity with time-harmonic sine wave irradiating, and applies CRIPTE software to simulate. Numerical results show that: It needs to consider electromagnetic interactions in the case of many apertures; More apertures are conducive to electromagnetic shielding on even shielding and heat dissipating condition.Finally, combining topological theory based on electromagnetic multi-step iterative algorithm, it establishes the electromagnetic interaction model of two electronic systems model, and applies CRIPTE software to simulate. Numerical results show that: The farther Distance between Circuit and aperture, the better the shielding effectiveness; Putting the circuit in the side of the cavity will achieve better shielding effectiveness than facing the aperture.