An Angularly Stable Frequency Selective Surface with Vent Holes for 5G Electromagnetic Shielding

A frequency selective surface (FSS) based electromagnetic shielding structure with vent holes is proposed for 5G electromagnetic (EM) shielding. The proposed FSS structure is developed for the demanding requirements of EM shielding at 28 GHz without worsening the ventilation. Through a number of simulations using full-wave analysis, the optimized FSS achieves a bandwidth of more than 2 GHz with 30 dB shielding effectiveness. Moreover, the proposed FSS-based shielding structure has the advantage of response stability to the incident angle from 0° up to 60° for both TE and TM polarization. Results show that there is a good agreement between the measurement and the simulation.