Electromagnetic Coupling Effect Emulation Analysis of Metal Body with Small Hole

In order to study the electromagnetic coupling law of a metal body with different form holes, the body model and electromagnetic field needed were set up by the electromagnetic emulation software FEKO. Data showed that: the electromagnetic wave near the source presented obvious reflection; the intensity of electric and magnetic field changed tempestuously at frequency of 700MHz, which was the resonance frequency of electromagnetic coupling; the intensity of the round hole coupling field in the experiment is higher than the square hole; obvious electromagnetic wave diffraction happended at a distance from the body; the vertical far field changed greatly, affected by the body reflection mainly; in z, y direction the internal electromagnetic fields had asymmetry nature as to the hole.