Fig. 2
From: Analytical model for helical particle array assessment for EMI shielding applications
(a) The electric field configuration of an infinite periodic planar array of circular waveguides on a specific cross-section in the resonance frequency range below its TE11 mode cutoff frequency. (b) Similar to (a), beyond the TE11 cutoff frequency. (c) The electric field configuration of an infinite periodic planar array of seven-turn helices on a specific cross-section in the resonance frequency range, below the TE11 mode cutoff frequency of a circular waveguide with an identical radius. (d) Similar to (c), beyond the aforementioned TE11 cutoff frequency. (e–f) The contour of Hz magnitude in the array of cylinders at 2 GHz and 3.5 GHz on the y = 0 plane (xz-plane). (g-h) The contour of Hz magnitude in the array of helices at 2 GHz and 3.5 GHz on the y = 0 plane (xz-plane). (i-j) The contour of Hz magnitude in the array of cylinders at 2 GHz and 3.5 GHz on the x = 0 plane (yz-plane). (k-l) The contour of Hz magnitude in the array of helices at 2 GHz and 3.5 GHz on the x = 0 plane (yz-plane). (m) The transmitted power through the infinite periodic planar array of cylinders. (n) The transmitted power through the infinite periodic planar array of helices. (The blue transparent cube represents the surrounding concrete material as the host medium. The total time-averaged power density of the incident wave is assumed to be 1 W/m2 = 0 dBW/m2.)
