## 9 Conclusions
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline
**Ref** & **Year** & **Size (mm3)** & **Flexible** & **No. of Ports** & **Frequency Band (GHz)** & **Gain (dBi)** & **Efficiency (\%)** & **Isolation** & **ECC** \\ \hline
[9] & 2018 & \(\begin{array}{c}142\times 79\\ \times 7.5\end{array}\) & No & 1 & \(\begin{array}{c}\text{(698--960 MHz) and}\\ \text{(1.710--2.690 GHz)}\end{array}\) & \multirow{2}{*}{–} & \multirow{2}{*}{42} & \multirow{2}{*}{–} & \multirow{2}{*}{–} \\ \hline
[10] & 2017 & \(\begin{array}{c}60\times 100\\ \times 0.965\end{array}\) & No & 2 & \(\begin{array}{c}1.870\text{--2.530 GHz}\\ \text{28 GHz}\end{array}\) & & & & & \\ \hline
[11] & 2012 & \(\begin{array}{c}110\times 45\\ \times 5\end{array}\) & No & 2 & \(\begin{array}{c}698\text{--960 and}\\ \text{1.710--2.690 GHz}\end{array}\) & & & & & & \\ \hline
[12] & 2017 & \(\begin{array}{c}145\times 72\\ \times 0.8\end{array}\) & No & 2 & \(\begin{array}{c}824\text{--960 MHz,}\\ \text{1.710--2.690 GHz}\end{array}\) & & & & & & \\ \hline
[13] & 2018 & \(\begin{array}{c}136\times 68\\ \times 6\end{array}\) & No & 2 & \(\begin{array}{c}3.5\text{--}3.9\,\text{GHz},\\ \text{2.3--2.5 GHz,}\\ \text{3.3--3.5 GHz}\end{array}\) & – & & & & & \\ \hline
[14] & 2019 & \(\begin{array}{c}60\times 100\\ \times 1\end{array}\) & No & 2 & \(\begin{array}{c}2.5\text{--}3.6\,\text{GHz},\\ \text{2.5--}3.6\,\text{GHz},\\ \text{2.5--}3.6\,\text{GHz}\end{array}\) & – & & & & & \\ \hline
[15] & 2019 & \(\begin{array}{c}65\times 130\\ \times 1\end{array}\) & No & 2 & \(\begin{array}{c}1710\text{--2690 MHz}\end{array}\) & – & & & & & \\ \hline
[16] & 2018 & \(\begin{array}{c}110\times 120\\ \times 0.508\end{array}\) & Semi & 2 & \(\begin{array}{c}3\text{ to }10\\ \text{2.6}\end{array}\) & – & & & & & \\ \hline
[17] & 2016 & \(\begin{array}{c}100\times 60\\ \times 0.8\end{array}\) & No & 4 & \(\begin{array}{c}2017\text{--}2265 MHz\\ \text{2.77}\end{array}\) & & & & & & \\ \hline
[18] & 2020 & \(\begin{array}{c}120\times 65\\ \times 1.6\end{array}\) & No & 4 & \(\begin{array}{c}\text{N77 (3.3--4.2 GHz),}\\ \text{n78 band (3.3--3.8 GHz) and n79 band}\\ \text{(4.4--5 GHz),}\end{array}\) & & & & & & \\ \hline
[19] & 2018 & \(\begin{array}{c}160\times 85\\ \times 0.8\end{array}\) & No & 4 & \(\begin{array}{c}824\text{--960 MHz/}\\ \text{1710--2690 MHz}\end{array}\) & – & & & & & \\ \hline
[20] & 2018 & \(\begin{array}{c}153\times 77\\ \times 1\end{array}\) & No & 4 & \(\begin{array}{c}3.3\text{--}3.6\,\text{GHz}\\ \text{3.3--}3.6\,\text{GHz}\end{array}\) & – & & & & & \\ \hline
[21] & 2018 & \(\begin{array}{c}150\times 73\\ \times 0.8\end{array}\) & No & 4 & \(\begin{array}{c}3.4\text{--}3.6\,\text{GHz}\\ \text{3.4--}3.6\,\text{GHz}\end{array}\) & – & & & & & \\ \hline
[22] & 2019 & \(\begin{array}{c}140\times 70\\ \times 0.8\end{array}\) & No & 4 & \(\begin{array}{c}3400\text{--}3600 MHz\\ \text{2.7--}3.6\,\text{GHz}\end{array}\) & – & & & & & \\ \hline
[23] & 2019 & \(\begin{array}{c}50\times 100\\ \times 4.5\end{array}\) & No & 4 & \(\begin{array}{c}2.7\text{--}3.6\,\text{GHz}\\ \text{2.7--}3.6\,\text{GHz}\end{array}\) & 3 & & & & & \\ \hline
[24] & 2020 & \(\begin{array}{c}39\times 30\times 1\\ 1\end{array}\) & No & 4 & \(\begin{array}{c}5.15\text{--}5.85\,\text{GHz}\\ \text{3.4--}5.85\,\text{GHz}\end{array}\) & 2.8 & \(\begin{array}{c}>70\\ \text{20}\end{array}\) & & & & & \\ \hline
[25] & 2019 & \(\begin{array}{c}38.3\times 3\\ 38.3\times 0.8\end{array}\) & No & 4 & \(\begin{array}{c}3.4\text{--}3.2\,\text{GHz}\\ \text{3.4--}3.2\,\text{GHz}\end{array}\) & & & & & \\ \hline Proposed & \(\begin{array}{c}70\times 145\\ \times 0.2\end{array}\) & Yes & 4 & \(\begin{array}{c}2.37\text{--}5.85\,\text{GHz}\end{array}\) & 4–5.5 & 85 & 17.5 & \(\begin{array}{c}<0.05\end{array}\) \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Performance comparison of the proposed antenna. levels greater than 15 dB. The diversity parameters of MIMO are also analyzed in terms of ECC, TARC, MEG, and channel capacity, where sufficient results meeting the desired limits are achieved.