# An Elliptical-Shaped Dual-Band UWB Notch Antenna for Wireless Applications
## 5 Conclusions  
An elliptical ultrawideband (UWB) antenna and a dual-band UWB notch antenna are described in this study. The rectangular slot on the partial ground plane is carved with two corner cuts in order to obtain UWB bandwidth. On a partial ground plane, two parasitic resonators, one of which is an inverted-U-shaped resonator, and the other  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Ref. No. \& Size** & **Area** & **Notch Frequency** & **No. of Notch** & \multicolumn{3}{c}{**Band Notch**} \\
**Year** & **(mm\({}^{2}\))** & **(mm\({}^{2}\))** & **Range** & **Frequencies** & **(GHz)** & **Gain** \\  & & & **(GHz)** & **f1** & **f2** & \\ \hline
[23], 2017 & 0.25 \(\lambda_{0}\times\) 0.25 \(\lambda_{0}\) & 900 & 4.97–5.48, 5.69–5.99 & 2 & 5.2 & 5.8 & –4.0–5.0 \\
[24], 2018 & 0.46 \(\lambda_{0}\times\) 0.55 \(\lambda_{0}\) & 2100 & 3.3–3.6, 5–6 & 2 & 3.56 & 5.4 & 2–8.5 \\
[25], 2019 & 0.28 \(\lambda_{0}\times\) 0.26 \(\lambda_{0}\) & 1720 & 2.3–2.5, 3.3–3.6 & 2 & 2.4 & 3.45 & 1.26–5.5 \\
[26], 2019 & 0.28 \(\lambda_{0}\times\) 0.28 \(\lambda_{0}\) & 1296 & 2.5–2.69, 3.3–4.2 & 2 & 2.6 & 3.5 & 1.4–3.5 \\
[27], 2020 & 0.35 \(\lambda_{0}\times\) 0.46 \(\lambda_{0}\) & 1200 & 5.5–6.2, 6.6–7.1 & 2 & 5.8 & 6.8 & 2–6 \\
[28], 2020 & 0.32 \(\lambda_{0}\times\) 0.30 \(\lambda_{0}\) & 960 & 3.45–4.81, 5.24–6.2 & 2 & 4.4 & 5.8 & 2.7–5.1 \\
[29], 2019 & 0.30 \(\lambda_{0}\times\) 0.30 \(\lambda_{0}\) & 900 & 5.1–6, 7.13–7.63 & 2 & 5.4 & 7.4 & 1.1–4.89 \\
[30], 2019 & 0.52 \(\lambda_{0}\times\) 0.37 \(\lambda_{0}\) & 875 & 3.3–3.96, 4.7–5.9 & 2 & 3.6 & 5.3 & 2.4–5.5 \\
[31], 2019 & 0.45 \(\lambda_{0}\times\) 0.42 \(\lambda_{0}\) & 786 & 5.1–5.9, 7–7.8 & 2 & 5.8 & 7.6 & 2.1–6.6 \\ Proposed work & 0.32 \(\lambda_{0}\times\) 0.42 \(\lambda_{0}\) & 768 & 5.2–5.7, 7.2–8.5 & 2 & 5.3 & 8.1 & 0.8–5.9 \\ \hline \hline \end{tabular} Note: \(\lambda_{0}\) is calculated using the lowest operating frequency of the antenna.  
\end{table}
Table 2: Comparison of the proposed antenna with previous works.  
Figure 29: Gain of the UWB notch antenna.  
of which is an iron-shaped resonator, are employed in order to obtain dual-band notch characteristics. The suggested antenna has an overall size of 24 \(\times\) 32 mm\({}^{2}\). The suggested UWB antenna has a gain of 4.9 dB, an impedance bandwidth of 2.5-11 GHz, a linear phase response, a group delay of less than one nanoseconds, and a consistent radiation pattern. The proposed UWB notch antenna demonstrates high rejection in the WLAN band between 5.2 and 5.7 GHz, with a sharp notch at 5.3 GHz, and in the ITU band between 7.2 and 8.5 GHz, with a sharp notch at 8.1 GHz, with an impedance bandwidth ranging from 2.5 to 11 GHz. The UWB notch antenna has a linear phase, less than 1 ns group delay, and a steady radiation pattern.  
Conceptualization, O.P.K., T.A., P.K. ([PERSON]), P.K. ([PERSON]) and J.A.; Methodology, O.P.K., T.A., P.K. ([PERSON]) and J.A.; Software, O.P.K.; Validation, O.P.K. and T.A.; Formal analysis, O.P.K. and P.K.; Investigation, O.P.K., T.A. and P.K. ([PERSON]), Resources, P.K. ([PERSON]), P.K. ([PERSON]) and J.A.; Data curation, O.P.K.; Writing--original draft, O.P.K.; Writing--review & editing, T.A., P.K. ([PERSON]), P.K. ([PERSON]) and J.A.; Visualization, T.A. and J. Supervision, T.A., P.K. ([PERSON]) and J.A.; Project administration, T.A. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
Not applicable.  
The authors declare no conflict of interest.