In order to study the coupling law of electromagnetic irradiation to enclosure with short penetrative wire

we established a coupling model of one enclosure with a short penetrative wire in CST. We also established a corresponding experiment platform based on the Gigahertz transverse electromagnetic（GTEM） chamber to verify the calculated results through experiments. Moreover

we analyzed influences of penetrative wire’s length and radius

size of aperture

the polarization direction of electric field on the electromagnetic coupling in enclosure with short penetrative wire under the condition of planar wave radiation

and revealed the coupling mechanism of penetrative wire induced electromagnetic interference. The results indicate that shielding effectiveness（SE） of an enclosure with aperture decreases from 40 d B to-15.29 d B when a wire is put in aperture. The SE of enclosure decreases by 4 d B when the length of external penetrative wire increases by 3 cm

while the resonance frequency is mainly influenced by the length of the penetrative wire inside the enclosure. When the length of a wire maintains a certain value but its length inside and outside the enclosure changes

both SE and resonance frequency change. The SE of enclosure descends when the aperture gets bigger. The SE of enclosure increases with increasing the distance from test point to penetrative wire. The radius of penetrative wire affects both SE and resonance frequency. The resonance frequency of enclosure increases by 8 MHz when the thickness of enclosure wall increases by every 0.3 cm. The higher the parallel electric field value is

the worse the enclosure’s SE will be.