## 4 Fabrication and Experimental Verification
### Return Loss  
The suggested antenna has a wide impedance BW S11/S2 coverage of 37.62 percent throughout the entire frequency range of 3.6-4.84 GHz. Over the whole band, the measured MC S21/S12-28 dB is reached. The agreement between simulation and measurement is good, and the tiny gap is primarily due to experimental defects and fabrication mistakes. The simu-lated and measured graphs show two modes, which are caused by a new conformal metal strip introduced at an optimal distance. where Figure 15 depicts the top view of the fabricated antenna. Where Figure 15 shows the front view with DGPS. Figure 16 depicts a comparison of the proposed MIMO antenna's calculated and simulated S-parameters. The reflection coefficient bandwidth is to be computed as 37.14 percent, that is a bit greater as compared to the fabricated values of 36.63 percent. with a minor difference due to the use of a predetermined PEC plane and fabricated acceptance Furthermore, due to the small mass of the antenna, it was impossible to completely reduce the possible air holes. There is a 1.55 percent variation among the two pairs of results because the lowest S11 is calculated at 3.73 GHz against 3.72 GHz in the fabric \begin{table}
\begin{tabular}{c c c c c} \hline
**Literature** & **Antenna Type** & **Isolation Technique** & **3 dB BW (\%)** & **Isolation (dB)** \\ \hline Ref [27] & DRAs & DGS and sliding & 13.23 & \(\sim\)17 \\ \hline Ref [28] & DRAs & DGS and sliding & 3.50 & \(\sim\)19 \\ \hline Ref [29] & Hybrid & SRR and Metasurface Shield & 3.55 & \(\sim\)31 \\ \hline Ref [30] & Printed & MPR. & 1.03 & \(\sim\)18 \\ \hline Ref [16] & DRA & Sliding and Parasitic Patch & 26 & \(\sim\)24 \\ \hline Proposed Antenna & Rectangular DRA & DGS & 28.33 & \(\sim\)28.25 \\ \hline \end{tabular}
\end{table} 
Table 6: Comparisons with other MIMO antennas on the basis of CP. Figure 15: Photographs of a fabricated, circularly polarized, wideband MIMO antenna: (**a**) Top view with DGPS; (**b**) Front view without DGPS. the findings accord nicely with the expected operating frequency for the mode induced by the DRA computed using the DWM approach. The comparison of the tested and simulated reflection coefficients shows that the tested findings closely match the simulated results. With reference to Figure 17, it is noticed that theoretical results of the transmission coefficient of wideband circularly polarized MIMO antenna depict suitable isolation (\(\mathbb{S}_{12}/\mathbb{S}_{21}\)\(\leq-28\) dB) through the circularly polarized operating band. During the measurement, one port is excited while one is attached to a 50 \(\Omega\) paired load. The measured isolation is varied with respect to frequency. Maximum Measured isolation between the radiators is achieved at 4.3 GHz. On the other side, Isolation reduces gradually from 4.3 GHz to 4.65 GHz, and the minimum isolation is attained at \(\sim\)4.65 GHz. The axial ratio broad bandwidth was calculated and evaluated in the weary-sight track, as presented in Figure 18, as its clear that the least calculated AR is 0.35 dB at 3.89 GHz, equated to a comparable assessed quantity of 0.55 dB at 3.91 GHz. With orientation book to the shape, the simulated cp bandwidth extended on or after 3.60 to 4.4. The GHz was 3.61, as compared to 4.39 GHz in the measurements. Furthermore, based on the findings, the intersecting 3-dB AR and return loss bandwidths from the simulated and fabricated were 100%. The theoretic efficient 3 dB AR bandwidth was found to be 28.33%, compared to  
Figure 16: Comparison of the return loss of the fabricated and simulated MIMO antenna. Figure 17: Comparison of the \(\mathbb{S}_{12}\) of the fabricated and simulated MIMO antenna. 26.52% in the experiment. It was observed that the entire axial ratio bandwidth completely fell within the S\({}_{11}\) bandwidth.