Ring and circular aperture hexagonal array resonance micromesh coating with infrared dual-bandpass extraordinary transmission and strong electromagnetic shielding

Abstract This paper proposes an infrared dual-bandpass conductive micromesh coating to provide strong electromagnetic shielding (SE) protect for dual-wavelength infrared sensors. Firstly, we design the dual-infrared resonant micromesh coating structure with hexagonal arrays of ring and circular apertures, then we determine the micromesh coating structure parameters and analyze the effect factors of dual-infrared transmittance. Finally, we simulate the dual-infrared bandpass filtering characteristics in infrared waveband and the electromagnetic shielding effectiveness in the microwave interference frequency-band. Simulation results show that the dual-bandpass micromesh coating filter has two resonance wavelengths of 2.63 μm and 7.40 μm with the corresponding extraordinary transmittances of 90% and 97% respectively, while it has a strong shielding effectiveness of 30 dB over 1-18 GHz.