FDTD Method And Its Application In Electromagnetic Compatibility

The background of electromagnetic compatibility is introduced. The basic principle of Finite Difference Time Domain (FDTD) and the foreground of this technique's application are set forth in this thesis. The key problems to calculate fields distribution using FDTD method are discussed. These problems include numerical stability, numerical dispersion, connection boundry, absorbing boundary condition, etc. The amplitude of scattering electric field and magnetic field distribution of two-dimensional medium and metal are computed. The electromagnetic shielding of the two-dimensional aperture is analyzed by using a special finite difference time domain method and the basic theory of electromagnetic scattering knowledge. The shielding effect of the aperture with difference thickness and gap width is discussed. Finally, shielding effect of double-shielding layers with apertures is computed by FDTD method.