Penetration electric field characteristics of dual plates with narrow slots for the incident plane wave

Abstract

This study examined the properties of the electric field penetration of a dual metallic wall with narrow slots when the plane wave is incident. Integral equations for aperture electric fields on slots were derived and solved by applying Galerkin's method of moments (MoM). The numerical results showed that a high level of electric field penetration, which is known as transmission resonance, can be obtained for a small plate spacing and two slots with the resonant length when both slots have a slight offset in the slot width direction. The maximum transmission resonance occurred at a transverse slot offset of 0.07λ for a given plate spacing. In addition, the penetration electric field fluctuates with the spacing of the plate, and the fluctuation period is approximately 0.5λ. The experimental measurements are also presented to validate the theory.

Resonance Transmission of Dual Plates with Narrow Small Slots due to Two Parallel Wires for Frequencies around 2 GHz

“…Recent studies have focused on the reduction of electromagnetic penetration through narrow slots in a conducting screen, and electric shielding effectiveness has been considered for a dual plate with narrow slots [12][13][14][15][16][17][18]. The resonant behavior of a small aperture backed by a conducting body has been reported [19], and enhanced resonance transmission has been investigated on shaped apertures, narrow small slots, and small square slots using two parallel wires (acting as a reactance) loaded in the slot [20][21][22][23][24][25][26].…”

Enhanced resonance transmission of a small square aperture loaded with parallel wires in a ground plane

“…The penetration of electromagnetic fields and wave transmission through a slot aperture in a conducting screen have been extensively studied [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16]. The reduction problem of the electromagnetic field penetration through a half-wavelength narrow slot has been investigated in the electromagnetic compatibility (EMC) fields as an aperture cutoff filter [17,18].…”