## 3 Methodology: PRISMA for Information Filtering
* **Included:** In the third phase, we conducted a thorough review of each article, including those that provided detailed formulations of their results. This in-depth review ensured that only the most relevant studies were included in our final analysis. Table 2 summarizes the articles included in our review (\(n=80\)). This table includes the authors, source, year, and country of each study. Regarding document type, 75.00% (\(n=60\)) are journal articles, 21.25% (\(n=17\)) are book chapters, and 3.75% (\(n=3\)) are conference articles. This distribution reflects the diversity and depth of the research conducted in the field of energy harvesting antennas. Regarding the origin country of studies, it is noted that the majority of contributions come from India, accounting for 20.00% (\(n=16\)), followed by China with 12.50% (\(n=10\)). Other countries such as United States, Iran, the United Kingdom, and Malaysia each contribute 6.25% (\(n=5\)); Greece contributes 5.00% (\(n=4\)); Brazil, Pakistan, Egypt, and Ecuador each contribute 3.75% (\(n=3\)); and Japan and France contribute 2.50% (\(n=2\)). Remaining countries, including Germany, Italy, Thailand, Belgium, Saudi Arabia  
Taiwan, Israel, Argentina, Iraq, Vietnam, Cyprus, Spain, and Senegal, each contribute one article, equivalent to 1.25% (\(n=1\)). \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Ref.** & **Author** & **Source** & **Year** & **Country** \\ \hline
[29] & [PERSON] et al. & Web of Science & 2012 & USA \\ \hline
[30] & [PERSON] et al. & Web of Science & 2012 & Greece \\ \hline
[31] & [PERSON] et al. & MDPI & 2012 & Germany \\ \hline
[32] & [PERSON] and [PERSON] & Springer & 2014 & Iran \\ \hline
[33] & [PERSON] et al. & Web of Science & 2014 & China \\ \hline
[34] & [PERSON] et al. & Web of Science & 2014 & USA \\ \hline
[35] & [PERSON] et al. & Web of Science & 2015 & Italy \\ \hline
[36] & [PERSON] et al. & Web of Science & 2015 & Japan \\ \hline
[37] & Pookkapund and Phongcharoenpanich & Springer & 2016 & Thailand \\ \hline
[38] & [PERSON] et al. & Web of Science & 2016 & Belgium \\ \hline
[39] & [PERSON] et al. & Springer & 2017 & Saudi Arabia \\ \hline
[40] & [PERSON] and [PERSON] & Springer & 2017 & India \\ \hline
[41] & [PERSON] et al. & Web of Science & 2017 & United Kingdom \\ \hline
[42] & [PERSON] et al. & Web of Science & 2017 & Malaysia \\ \hline
[43] & [PERSON] et al. & Springer & 2018 & India \\ \hline
[44] & [PERSON] et al. & Springer & 2018 & India \\ \hline
[45] & [PERSON] and Kunte & Springer & 2018 & India \\ \hline
[46] & [PERSON] et al. & Web of Science & 2018 & Brazil \\ \hline
[47] & [PERSON] et al. & Web of Science & 2018 & United Kingdom \\ \hline
[48] & [PERSON] et al. & Web of Science & 2018 & Algeria \\ \hline
[49] & [PERSON] et al. & Web of Science & 2018 & Iran \\ \hline
[50] & [PERSON] et al. & IEEE & 2018 & Pakistan \\ \hline
[51] & [PERSON] and Vairavel & Springer & 2019 & India \\ \hline
[52] & [PERSON] et al. & Springer & 2019 & India \\ \hline
[53] & [PERSON] and Lan & Springer & 2019 & Taiwan \\ \hline
[54] & Haerinia and Noghanian & Web of Science & 2019 & USA \\ \hline
[55] & [PERSON] and Aliakbarian & Web of Science & 2019 & Iran \\ \hline
[56] & [PERSON] & Web of Science & 2019 & Israel \\ \hline
[57] & [PERSON] et al. & Web of Science & 2019 & Iran \\ \hline
[58] & [PERSON] et al. & IEEE & 2019 & Brazil \\ \hline
[59] & [PERSON] et al. & IEEE & 2019 & Argentina \\ \hline
[60] & [PERSON] et al. & IEEE & 2019 & Pakistan \\ \hline
[61] & Mansour and Kanaya & MDPI & 2019 & Japan \\ \hline
[62] & Karampatea and Siakavara & MDPI & 2019 & Greece \\ \hline
[63] & [PERSON] et al. & MDPI & 2019 & Egypt \\ \hline
[64] & Karampatea and Siakavara & ScienceDirect & 2019 & Greece \\ \hline
[65] & [PERSON] & ScienceDirect & 2019 & Iraq \\ \hline
[66] & [PERSON] et al. & Springer & 2020 & Malaysia \\ \hline
[67] & [PERSON] et al. & Springer & 2020 & India \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Articles included in the review.