###### Abstract
This research jointly enhances the development of epoxy resin composites for electromagnetic applications. Iron pyrite, sometimes called fool's gold, has attracted interest for its prospective uses across several domains. Researchers have investigated its use in photovoltaics because of its energy characteristics. Pyrite, also known as iron sulfide, has been used in laboratory studies for high-frequency electromagnetic tests to illustrate polarization effects [36; 37]. Iron pyrite's crystalline structure and magnetic characteristics make it a viable candidate for applications including electrodes [38; 39]. Table 1 shows the electromagnetic absorption values of different building materials. Compared with other materials, such as concrete, which typically exhibits reflection coefficients between \(-10\) dB to \(-20\) dB, the FeS\({}_{2}\)-epoxy composite outperforms with much lower reflection losses (\(-45\) dB) and more robust energy transfer at higher frequencies. For brick (5 dB to 15 dB reflection), the composite offers superior transmission with reduced reflection losses, showing an overall 25% improvement in transmission efficiency. Gypsum board, with absorption values between 8 dB and 25 dB, performs similarly at lower frequencies, but the FeS\({}_{2}\)-epoxy composite demonstrates 30% better transmission and 15% less reflection at higher frequencies [47]. Wood, typically reflecting 5 dB to 12 dB, is outperformed by the composite, which offers tunable absorption and a reflection reduction of nearly 35%. Compared to other composite materials (10 dB to 30 dB), the FeS\({}_{2}\)-epoxy material demonstrates enhanced electromagnetic interaction with a 40% increase in energy transfer [48]. Finally, steel and natural stone, ranging from 20 dB to 40 dB in absorption, show stronger absorption than the FeS\({}_{2}\)-epoxy composite. However, their high reflection coefficients make them less suitable for applications requiring low signal reflection. The FeS\({}_{2}\)-epoxy composite, with its reflection coefficient reduced by 20%, offers a better balance between absorption and reflection. The FeS\({}_{2}\)-epoxy composite's tunable electromagnetic properties, including its transmission efficiency of 90%, low reflection losses of 10%, and controlled absorption, make it superior for high-performance electromagnetic applications, especially as an antenna substrate. Its performance, particularly at frequencies between 1 GHz and 15 GHz, significantly exceeds that of traditional materials like concrete, brick, and steel, making it a strong option for applications requiring efficient energy transfer and minimized signal loss. Composite materials are essential in electromagnetic applications because they integrate several qualities, including electrical conductivity and magnetic permeability, to fulfil particular functional needs. A prevalent instance is Carbon Fiber Reinforced Polymer (CFRP), extensively used for electromagnetic shielding in aeroplanes, vehicles, and consumer electronics, owing to carbon fiber's high electrical conductivity and lightweight nature [49]. Ferrite composites, composed of iron oxides and ceramics, are widely used in antenna and transformer cores owing to their elevated magnetic permeability and re \begin{table}
\begin{tabular}{c c c} \hline \hline
**Materials Value** & **Electromagnetic Wave Absorption dB** & **References** \\ \hline Concrete & 10–20 & [40] \\ Brick & 5–15 & [41] \\ Gypsum board & 8–25 & [42] \\ Wood & 5–12 & [43] \\ Composite material & 10–30 & [44] \\ steel & 20–40 & [45] \\ Natural stone & 20–40 & [46] \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Building materials’ electromagnetic wave absorption. duced electrical conductivity, which aids in minimizing eddy current losses. Conductive polymer composites, including conductive elements such as silver or carbon nanotubes in flexible polymers, are used in wearable electronics, flexible antennas, and electromagnetic sensors, providing electrical conductivity and flexibility.