This paper presents a performance comparison of a comb-shaped Vivaldi antenna for ultrawideband (UWB) applications, which is antipodal in nature. The antenna utilizes a 50 Ω microstrip feed line for energizing the antenna. To achieve ultrawide-band behavior, a parasitic elliptical-shaped patch and corrugated slots are employed. The patch controls frequency shifting along with high-gain behavior via electromagnetic coupling. To validate the proposed antenna, Rogers RT5880 substrate is used (εᵣ=2.2., tan .δ=0.0009). The proposed antenna operates in a frequency range from 5 to 28 G H z, with the highest gain of 12.5dBi at 27.5GHz. It has a total radiation efficiency of $97 %$ at 21.25GHz. The proposed Vivaldi antenna is a suitable candidate for high-gain wireless applications. The CST Studio Suite is employed to extract the simulation results of the antenna.
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Razib et al. (2024) studied this question.
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