Shielding Effectiveness of a Rectangular Enclosure with Aperture and Wire Penetration

An enclosure without aperture and wire penetration are impracticable due to the requirement for ventilation and cables. This paper is written to present the measurement of shielding effectiveness (SE) and S₂₁ for such enclosure at frequencies below 1 GHz. The measurement results indicate that a wire or cable penetrating into an enclosure has impact to the shielding effectiveness. The coupling between a wire penetration and a detector inside the enclosure show good agreement between experiment and simulation. All results indicate the same resonant frequency approximately 707.1 MHz for a 300 times 120 times 300 mm enclosure.