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Electromagnetic topological decomposition of rectangular cavity and CRIPTE simulation

Electromagnetic topology method is used to compute the inner electromagnetic field. In the first, it is established the topological interaction sequence diagram between external excitation source and internal electronic system through multiapertures. Then, the corresponding multistep iterative algorithm of apertures coupling is obtained. Finally, the CRIPTE software is used to calculate the electromagnetic effect from external field coupling to internal one and the terminal load of double conductor transmission lines. Numerical result illustrates that the interaction between apertures should be taken into consideration; more apertures be propitious to electromagnetic shielding under the same area; the farther distance between circuit and aperture, the better the shielding effectiveness; putting the electric circuit in the side of the cavity will achieve better shielding effectiveness than in the front of the aperture.