Design and analysis of a cross split ring frequency-sensitive surface-based EM shield in wireless communication

Abstract

Due to the growing operational frequency of wireless devices and systems, electromagnetic (EM) interference has escalated into a severe problem. As a result, EM shielding became crucial for safeguarding extremely sensitive radio frequency (RF) electronics. For mobile communication, a frequency selective surface (FSS) based EM shield is presented in this study due to its benefits, including its compact size, frequency selectivity, and high stability. Two exterior square loops and a cross split ring loop make up the FSS unit cell, which was created using geometry. The suggested structure has an overall dimension of (50x50x2) mm and was created using COMSOL software RF module. The findings indicate that the FSS shield resonates with a center frequency of 5 GHz, respectively, spanning the 5G frequency ranges. At this band frequency, the suggested design offers shielding efficacy of roughly -30 dB, which is better than cross design. Moreover, this study shows better electric field norm and contour.