Our daily lives are filled with a wide variety of electromagnetic waves . To ensure that radio products are safe to use, they must undergo RF exposure evaluation. RF exposure evaluation, EMF measurements, or SAR testing can be used to conduct this evaluation. Time-consuming SAR measurement methods are used by the SAR standard. Mobile wireless device compliance test lead times are incompatible with industry needs and are becoming a significant pain as 5G communications proliferate. When it comes to peak spatialaverage SAR evaluation, this study proposes a new technology aimed to solve this challenge and provide instantaneous and accurate peak SAR evaluation.

There are numerous applications for microwave absorbers in the L, S, C, X, and Ku bands. Creating a terahertz absorber, on the other hand, has proven difficult. This paper presents a metamaterial absorber operates at terahertz frequencies. It has a square shaped outer ring and a circle shaped inner ring unit cell split ring resonator. The substrate is dielectric material and the ground is metallic. According to the simulation results, the unit cell resonates at two frequencies that is at 1.3027THz and 1.7853THz with absorptivity is greater than 90% at normal incidence .The main cause of high absorbance is due to strong electromagnetic field. The proposed structure in this paper is useful for terahertz imaging, detection of malignant tumors and stealth technology.