Design of a Modified Wilkinson Power Divider for Ultra-Wideband Antipodal Vivaldi Antenna Arrays

Sajjad Ahmed Bhatti; Fawad Salam Khan; Imran Khan Keerio; Arslan Ahmed; Syed Qutaba

Authors

Sajjad Ahmed Bhatti Department of Computer Science, The University of Larkano, (TUL), Larkana, Sindh, Pakistan
Fawad Salam Khan Campus Cit´e scientifique, University’s de Lille, Villeneuve-d’Ascq, Lille, 59650, Hauts-de-France, France
Imran Khan Keerio Departement of Computer Science, Sindh Madressatul Islam University, Karachi Pakistan
Arslan Ahmed Faculty of Engineering, The University of Larkano, (TUL), Larkana, Pakistan
Syed Qutaba Department of textile Engineering, BUITEMS, 87300, Quetta, Baluchistan, Pakistan

Keywords:

Feeding Network, Antenna Array, Imaging, Modified Wilkinson Power Divider, UWB, AVA, CST

Abstract

This paper presents the design of a two-way Modified Wilkinson power divider (MWPD) feeding network for a two-element Antipodal Vivaldi Antenna (AVA) array, operating in the 3–10 GHz ultra-wideband (UWB) frequency range. The proposed feeding network is optimized by incorporating bent corners, which help reduce unintended radiation and improve signal distribution. Additionally, the antenna design is enhanced using a compact structure to improve radiation performance and impedance matching. The design, simulation, and optimization of both the feeding network and antenna array are conducted using CST Microwave Studio. Experimental validation confirms that the proposed array meets UWB specifications, making it a suitable candidate for wideband communication and imaging applications.

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