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Research Article |

Design and Analysis of Vivaldi Antenna for UWB Applications

Author(s): Mustafa Ghanim1, Mohaimen Q. Algburi2, Ayman N. Muhi3

Published In : International Journal of Electrical and Electronics Research (IJEER)        Volume 14, Issue 1

Publisher : FOREX Publication

Published : 10 March 2026

e-ISSN : 2347-470X

Page(s) : 18-26

DOI: https://doi.org/10.37391/IJEER.140103

Abstract

This paper is about the design and analysis of an ultra-wideband Vivaldi antenna. The antenna is fabricated on FR4 of size 90x53 mm² and thickness of 1.4 mm. The slot profile of the antenna is exponentially tapered and is designed to support ultra-wideband (UWB) communication. Two identical slots were made on the radiator of the antennas to enhance the efficiency of radiation and reduce surface current. Measurement results show that it has a wide operating frequency of 3 GHz to 12 GHz with good impedance of (S11 < -10 dB) across all the band. The gain of the antenna is measured to be 8.37 dBi which is classified as high gain antenna and may be utilized in high frequency and other high gain applications. This design enables end-fire radiation, meaning the directional radiation characteristic of Vivaldi antennas in the axis of the antenna aperture, and steady directional operation, suitable to advance communication systems, such as 5G, radar, ground-based radar (GPR), microwave imaging, and ultra-wideband sensing as well as the FR4 material is a low cost and viable substrate to be used in various applications. The suggested antenna was developed and simulated through Computer Simulation Technology (CST) software, and it showed fair correspondence between theoretical and experimental findings, which showed correctness in the design. In general, the proposed antenna presents an attractive prospect for next-generation broadband wireless applications that require compact, wideband, and high-performance radiating elements.

Keywords: Ultra-wideband, FR4, ground-penetrating radar, Gain, CST.




Mustafa Ghanim, College of Communication Engineering, University of Technology, Iraq; Email: mustafa.g.rzooki@uotechnology.edu.iq

Mohaimen Q. Algburi ,College of Communication Engineering, University of Technology, Iraq; Email: mohaimen.q.khalaf@uotechnology.edu.iq

Ayman N. Muhi ,College of Communication Engineering, University of Technology, Iraq; Email: aymen.n.muhi@uotechnology.edu.iq

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Mustafa Ghanim, Mohaimen Q. Algburi and Ayman N. Muhi (2026),Design and Analysis of Vivaldi Antenna for UWB Applications . IJEER 14(1), 18-26. DOI: 10.37391/IJEER.140103.