\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline
**Ref.** & **Frequency** & **Material** & **Size** & **Bandwidth** & **SAR (W/Kg)** & **Description** \\  & **(MHz/GHz)** & **Substrate/Patch** & **(W \(\times\) L) (mm\({}^{2}\))** & **(BW) (MHz)** & **(1 g/10 g)** & **Us** & **Us** \\ \hline \hline
[14] & 2.4 & Fully Textile & \multirow{2}{*}{\(50\times 57\)} & 140.0 & Fully-textile, large size, single \\  & & Sleeve-Badge & & (Multiple Layers) & (Free Space) & 0.34 (10 g) & \begin{tabular}{c} Fully-textile, large size, single \\ band. Not fully tested on \\ the body. \\ \end{tabular} \\  & Textile Antenna & & & & & \\ \hline \multirow{5}{*}{[15]} & 2.5/4.2/5.5/6.8 & \multirow{5}{*}{\(40\times 40\)} & \multirow{5}{*}{\(70/90/350/710\)} & \multirow{5}{*}{NA} & Multiband, small size, not fully textile. Might be difficult to fabricate. \\  & & Structure (DGS) & & & & \\ \cline{1-1}  & with Meander & & & & & to fabricate. \\ \cline{1-1}  & line & & & & & \\ \hline \multirow{5}{*}{[16]} & 2.4/5.2 & \multirow{5}{*}{Felt/Shieldlt} & 85/200 (Free Space) & 0.2/0.15 & Fully textile, dual-band, small \\  & Metamaterial- & loaded & & & & (On-Arm) & size, measured on body, use of \\  & Antenna & & & & & (On-Chest) & 0.12/0.25 \\ \cline{1-1}  & 2.5 & \multirow{5}{*}{Monopole Patch} & Shieldt/(leans & \multirow{5}{*}{\(50\times 60\)} & 667 (Free-Space) & \multirow{5}{*}{NA} & Fully textile, small size, single \\  & antenna & & Cotton) & & (Free-Space) & & band, Not tested on the body. \\ \hline \multirow{5}{*}{[17]} & 2.5 & \multirow{5}{*}{U-slot Patch Antennas} & \multirow{5}{*}{Felt/Copper Foil} & \multirow{5}{*}{85\(\times\)70} & 270 (Free space) & \multirow{5}{*}{NA} & Fully flexible, single band, \\  & & & & & & & large size, mostly evaluated \\ \cline{1-1}  & 2.4 & \multirow{5}{*}{Felt/Shieldlt} & \multirow{5}{*}{85\(\times\)70} & 270 (Free space) & \multirow{5}{*}{NA} & \multirow{5}{*}{\
\begin{tabular}{c} Fully flexible, small size, use \\ of frequency selective surface \\ might make it difficult to fabricate, single band, not fully tested on the body and under bending. \\ \end{tabular} \\  & Antennas & & & & & \\ \hline \multirow{5}{*}{[19]} & 2.075 to 2.625 & \multirow{5}{*}{\(38\times 50.8\)} & 101 Free Space & 2.88/0.35 & Fully flexible, single-band, not fully tested on the body. Used \\  & Monopole & & & & (Hybridt Arm/Chest) & & \\ \cline{1-1}  & Antenna with FSS & & & & & \\ \cline{1-1}  & Surface & & & & & \\ \hline \multirow{5}{*}{[20]} & 2.4/5.5 & \multirow{5}{*}{Felt/Shieldlt Slots Antenna} & \multirow{5}{*}{\(82\times 72\)} & 132/422 & 0.16/0.2 & Fully textile, dual bands, large \\  & & Reader Line & & & 138/409 (On-Chest) & & size, not fully tested on the body. \\ \cline{1-1}  & Slots Antenna & & & & (On-Body) & (On-Chest) & \\ \hline \multirow{5}{*}{[21]} & 2.4 GHz & \multirow{5}{*}{Felt/Shieldlt Antennas} & \multirow{5}{*}{\(80\times 100\)} & 101 Free Space & 2.88/0.35 & Fully flexible, single-band, not fully tested on the body. Used \\ \cline{1-1}  & Microstrip Patch Antennas & & Super & & (Right- & (Upper Right Arm) & for exposure to the \\ \cline{1-1}  & 2.45 & Polyphenylene & & & & \\ \cline{1-1}  & L-Shaped Patch Antenna & Ether & \multirow{5}{*}{\(50\times 50\)} & 120 (On-Body) & 0.6414/1.524 & \multirow{5}{*}{
\begin{tabular}{c} Large size, single band. Not \\ 10 g (On-Chest) \\ \end{tabular} \\ \cline{1-1}  & Full Flexible Monopole Antenna & & & & & \\ \cline{1-1}  & Full Flexible Monopole Antenna & & & & & \\ \cline{1-1}  & 2.45 & \multirow{5}{*}{Felt/Shieldlt} & \multirow{5}{*}{\(40\times 60\)} & 720 (Free space) & \multirow{5}{*}{NA} & Fully flexible, single-band, \\ \cline{1-1}  & Full Flexible Monopole Antenna & & & & & & large size, not fully tested on the body. \\ \cline{1-1}  & 2.00-3.00/5.60– & Substrate & & & 1282.4/450.5 & On-Chest & Fully flexible, compact size, \\ \cline{1-1}  & 6.00 & (Felt)/Copper & & & (Free space) & 1.22/0.75 (1 g), & dual-band, tested in free-space \\ \cline{1-1}  & Meaner Line Monopole Antenna & & & & & & (On-Chest) & on-Arm \\ \cline{1-1}  & & & & & & & \\ \cline{1-1}  & & & & & & & \\ \cline{1-1}  & & & & & & & \\ \hline \multirow{5}{*}{[23]} & 2.20–3.00/5.60– & Substrate & & & 1282.4/450.5 & On-Chest & Fully flexible, compact size, \\ \cline{1-1}  & 6.00 & (Felt)/Copper & & & (Free space) & 1.22/0.75 (1 g), & dual-band, tested in free-space \\ \cline{1-1}  & Meaner Line Monopole & & & & & & & \\ \cline{1-1}  & & & & & & & \\ \cline{1-1}  & & & & & & & \\ \cline{1-1}  & & & & & & & \\ \cline{1-1}  & & & & & & & \\ \cline{1-1}  & & & & & & & \\ \cline{1-1}  & & & & & & & \\ \hline \hline \end{tabular}
\end{table}