With the exponential increase in the number of electronic and wireless systems, electromagnetic interference (EMI) has become a major technical challenge limiting the development of modern optoelectronic systems. To address the optoelectronic synergy requirements of EMI shielding materials in scenarios such as aircraft optical windows, these materials must balance shielding effectiveness (SE) with high light transmittance. This paper proposes two transparent electromagnetic shielding film structures: a double-layer nested circular mesh, and a bionic double-layer honeycomb grid structure. By optimizing variables including unit period and metal line filling ratio, we achieve effective balance between high SE and optical transparency. Full-wave simulations demonstrate that the single-layer nested circular metal mesh exhibits light transmittance exceeding 88% with SE greater than 28.8 dB below 40 GHz, while the double-layer version achieves SE greater than 45.7 dB in the same frequency range. Another solution involves a transparent EMI shielding film based on double-layer honeycomb grid structures. Simulation results show 46 dB SE at 18 GHz. Both solutions outperform most existing photolithography-patterned metal wire structures in performance, showing significant potential for practical optoelectronic applications in aerospace vehicles.
