# A Frequency-Selective Reconfigurable Antenna for Wireless Applications in the S and C Bands
## 4 Experimental Results and Discussion
### Comparative Study
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Ref.**} & **Dimensions** & \multirow{2}{*}{**No. of Diodes**} & \multirow{2}{*}{**Diode Location**} & \multirow{2}{*}{**Operating Frequencies (GHz)**} & \multirow{2}{*}{**Max Gain**} & \multirow{2}{*}{**DGS**} \\  & **(mm\({}^{2}\))** & & & & & \\ \hline \multirow{2}{*}{[31]} & \multirow{2}{*}{\(25\times 25\)} & \multirow{2}{*}{2} & \multicolumn{2}{c}{Patch and} & \multirow{2}{*}{4.80, 5.32, 6.01, 6.22, 6.41} & \multirow{2}{*}{3.85} & \multirow{2}{*}{Yes} \\  & & & Ground Plane & & & \\ \multirow{2}{*}{[32]} & \multirow{2}{*}{\(16\times 22\)} & \multirow{2}{*}{2} & \multirow{2}{*}{Resonator} & \multirow{2}{*}{2.09, 2.15, 3.16, 4.3, 4.8, 5.2, 5.3} & \multirow{2}{*}{2.5} & \multirow{2}{*}{No} \\  & & & & & & \\ \multirow{2}{*}{[14]} & \multirow{2}{*}{\(66\times 58\)} & \multirow{2}{*}{1} & \multirow{2}{*}{Patch} & \multirow{2}{*}{2.4, 3.8, 5.3} & \multirow{2}{*}{5.34} & \multirow{2}{*}{No} \\  & & & Radiating & & & \\ \multirow{2}{*}{[33]} & \multirow{2}{*}{\(44\times 14\)} & \multirow{2}{*}{2} & \multirow{2}{*}{Radiating} & \multirow{2}{*}{0.84, 2.12} & \multirow{2}{*}{2.12} & \multirow{2}{*}{No} \\  & & & Element & & & \\ \multirow{2}{*}{[34]} & \multirow{2}{*}{\(23\times 31\)} & \multirow{2}{*}{3} & \multirow{2}{*}{Ground Plane} & \multirow{2}{*}{3.1, 6.8, 2.5–4.2, 6.2–7.4} & \multirow{2}{*}{4.6} & \multirow{2}{*}{No} \\  & & & & & & \\ \multirow{2}{*}{[24]} & \multirow{2}{*}{\(32\times 40\)} & \multirow{2}{*}{4} & \multirow{2}{*}{Patch} & \multirow{2}{*}{1.8, 2.1, 2.6, 3.5, 5.6, 6.4, 6.5} & \multirow{2}{*}{3.6} & \multirow{2}{*}{No} \\  & & & Resonator & Multiple between 1.74 and 4.84 GHz & 3.86 & & \\ \multirow{2}{*}{[36]} & \multirow{2}{*}{\(30\times 30\)} & \multirow{2}{*}{4} & \multirow{2}{*}{Patch} & \multirow{2}{*}{2.52, 2.68, 3.49, 3.58} & \multirow{2}{*}{4.46} & \multirow{2}{*}{No} \\  & & & & & & \\ \multirow{2}{*}{[37]} & \multirow{2}{*}{\(46\times 32\)} & \multirow{2}{*}{12} & \multirow{2}{*}{Patch} & \multirow{2}{*}{1.95–2.30, 2.36–4.17, 4.52–5.39} & \multirow{2}{*}{4.67} & \multirow{2}{*}{No} \\  & & & & & & \\ \multirow{2}{*}{[38]} & \multirow{2}{*}{\(30\times 20\)} & \multirow{2}{*}{3} & \multirow{2}{*}{Patch} & \multirow{2}{*}{2.1, 2.6, 3.5, 5.0, 6.2, 6.4, 3.51–8.51} & \multirow{2}{*}{2.5} & \multirow{2}{*}{No} \\  & & & Ground Plane & & & \\ \multirow{2}{*}{[39]} & \multirow{2}{*}{\(58\times 50\)} & \multirow{2}{*}{2} & \multirow{2}{*}{Ground Plane} & \multirow{2}{*}{1.750, 1.7750, 1.815, 1.610} & \multirow{2}{*}{1} & \multirow{2}{*}{Yes} \\  & & & & & & \\ \multirow{2}{*}{[40]} & \multirow{2}{*}{\(80\times 50\)} & \multirow{2}{*}{2} & \multirow{2}{*}{Patch} & \multirow{2}{*}{0.915, 0.433, 0.868} & \multirow{2}{*}{2} & \multirow{2}{*}{No} \\  & & & Ground & & & \\ \multirow{2}{*}{[41]} & \multirow{2}{*}{\(50\times 46\)} & \multirow{2}{*}{5} & \multirow{2}{*}{Ground} & \multirow{2}{*}{1.777, 1.909, 1.986, 2.151, 2.302, 2.421} & \multirow{2}{*}{3.23} & \multirow{2}{*}{No} \\ \multirow{2}{*}{This Work} & \multirow{2}{*}{\(70\times 60\)} & \multirow{2}{*}{1} & \multirow{2}{*}{Ground Plane} & \multirow{2}{*}{2.07, 4.63, 6.22} & \multirow{2}{*}{12.79} & \multirow{2}{*}{Yes} \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Comparison between the proposed antenna and those of other, related works. applications where portability is important and where reduced space is a key matter such as in military applications.