Electromagnetic exposure became an alarming issue in the 20th century, which has resulted in the creation of shielding metamaterial to reduce the radiation effects from any wireless devices. In this research work, a square-shaped metamaterial structure was designed and numerically simulated using a well-known computer simulation technology microwave studio software. The relationship between human head and cellular phone was explored for L- and S-bands, respectively. The proposed metamaterial design is utilized by placing inside a mobile phone to reduce the electromagnetic effect that is absorbed by the human head. The simulation frequency range is adopted from 1 to 6 GHz where the square-shaped metamaterial manifests resonance frequencies at 1.602 GHz (L-band), 2.712 and 3.888 GHz (S-band). Meanwhile, the specific absorption rate results reveal that the reduction happened approximately 1.591% at L-band, 36.646% and 17.864% at S-band over 1 g of tissue volume. Moreover, the second highest reduction value exhibited at 2.712 GHz for 10 g of tissue volume with 20.077% respectively. Briefly, the findings reveal a strong specific absorption rate reduction accomplishment and the proposed square-shaped metamaterial design believed to be a promising aspect in the telecommunication field.

电磁辐射在20世纪成为一个令人震惊的问题，这导致了屏蔽超材料的产生，以减少任何无线设备的辐射影响。在这项研究工作中，设计了一个方形的超材料结构，并使用著名的计算机模拟技术微波工作室软件对其进行了数值模拟。分别针对L波段和S波段探讨了人头与手机之间的关系。拟议的超材料设计可通过将其放置在手机中来减少人头吸收的电磁效应。仿真频率范围为1到6 GHz，其中方形超材料显示的共振频率为1.602 GHz（L波段），2.712和3.888 GHz（S波段）。与此同时，比吸收率结果表明，在1 g组织体积中，L波段的吸收率下降了约1.591％，S波段的下降率分别为36.646％和17.864％。此外，第二高的降低值在2.712 GHz处显示于10 g组织体积中，占20.077％。简而言之，该发现揭示了很强的比吸收率降低效果，并且所提出的方形超材料设计被认为是电信领域中一个有希望的方面。