Frequency-Selective Surface-Based Composite Radar Absorbing Structures Using Transferred Laser-Induced Graphene on Glass Fiber Fabric with Enhanced Interlaminar Shear Strength

초록

Stealth technology often relies on frequency-selective surfaces (FSS) for radar absorption. Traditional FSS-RAS fabrication requires time-consuming steps involving conductive inks and metallic masks. This study replaces these with laser-induced graphene (LIG) [1] patterns transferred onto glass fiber prepregs, forming an FSS-RAS based on a Jerusalem cross design. Using a CO2 laser, LIG is created on polyimide film, then pressure-rolled transferred on glass fiber fabric. The composite is vacuum-bagged and cured, achieving over 90% radar absorption across X-band with a thin 2.91?mm thickness. This scalable, straightforward approach facilitates precise patterning without complex tasks. Short-beam shear test results also shows that interlaminar shear strength (ILSS) of composite increases when integrating LIG as interlayer between each ply of glass fabric.