DESIGN OF A DUAL-BAND FREQUENCY SELECTIVE SURFACE WITH HIGH SHIELDING EFFECTIVENESS AND PHASE LINEARITY FOR ELECTROMAGNETIC PROTECTION IN NEXTGENERATION COMPUTING AND IOT SYSTEMS

In this paper, an ultra-compact 16161.6 mm dual-band Frequency Selective Surface (FSS) is proposed for EM interference shielding in computing and IoT devices.The FSS demonstrates two stop bands (6.96-10.22GHz with a suppression of 38 dB, and 12.34-13.82GHz with a suppression of 28 dB), with a peak shielding effectiveness of 88 dB.The structure remains stable against TE/TM waves at diverse angles, and surface currents at 8.28 GHz affirm resonance localization.Near-linear reflection phase facilitates smart antennas, beamforming, and reconfigurable RF modules and is therefore suitable for secure, AI-driven IoT platforms.