Fig. 1. Design description of the random double-line ring metal mesh. (a) Square metal mesh structure; (b) double-line metal mesh structure; (c) double-line ring metal mesh structure; (d) random double-line ring metal mesh structure; (e) random double-line ring metal mesh; (f) geometric details of the connecting part of the random double-line

Fig. 2. Electromagnetic shielding effectiveness curves. (a) Random double-line metal meshes with different randomness and different double-line gaps; (b) random double-line ring metal meshes with different randomness and different ring radii

Fig. 3. Electromagnetic shielding effectiveness and obscuration ratio curves. (a) Electromagnetic shielding effectiveness curves of random double-line ring metal meshes under different line widths; (b) obscuration ratio curves of random double-line ring metal meshes under different line widths; (c) electromagnetic shielding effectiveness curves of random double-line ring metal meshes under different periods; (d) obscuration ratio curves of random double-line ring metal meshes under different periods

Fig. 4. Obscuration ratio and average electromagnetic interference shielding effectiveness curves. (a) Random double-line metal mesh;

Fig. 5. Normalized diffraction energy distributions. (a) Square metal mesh; (b) double-line metal mesh; (c) double-line ring metal mesh; (d) random double-line ring metal mesh, p=25%; (e) random double-line ring metal mesh, p=50%; (f) random double-line ring metal mesh, p=75%

Fig. 6. Three-dimensional diagrams of normalized diffraction energy distribution. (a) Square metal mesh; (b) double-line metal mesh; (c) double-line ring metal mesh; (d) random double-line ring metal mesh, p=25%; (e) random double-line ring metal mesh, p=50%; (f) random double-line metal mesh, p=75%

Fig. 7. Three-dimensional diagrams of normalized diffraction energy distribution. (a) Random in x-axis direction; (b) random in y-axis direction