Progressive Structural Development of a UWB Strip Antenna using a Ground Structure (DGS)

zeena12 mahdy; Nabeel Abbas Areebi

doi:10.71229/bpmrd368

Authors

Zeena Yaseen Mahdy Physics Department, College of Education, University of Al- Qadisiyah, Diwaniyah, Iraq
Nabeel Abbas Areebi Physics Department, College of Education, University of Al- Qadisiyah, Diwaniyah, Iraq

DOI:

https://doi.org/10.71229/bpmrd368

Keywords:

Progressive structural,, UWB, , Improvement, , Wi-Fi, , hexagonal shape

Abstract

This research presents a step-by-step development methodology for a wideband strip antenna, based on four stages of structural evolution: starting with a reference circular shape, progressing through a hexagonal shape, then an octagonal configuration with symmetrical crescent apertures on a full ground surface, culminating in the fourth and crucial stage of introducing a defect in the ground plane (a partial ground structure). The antennas were designed on a Rogers RO4003C substrate, and simulations were performed using CST Microwave Studio software.

In the first three stages, the octagonal configuration extended the operational frequency bandwidth from 3% in the initial circular design to a wide bandwidth of 10.6%, with a directivity of 5.76 dB. In the fourth stage, reducing the ground surface to a partial rectangle resulted in a radical performance leap, achieving exceptional ultra-wideband response that clearly surpasses previous full ground-surface designs, along with good stability in the stop wave ratio and a significant improvement in gain and radiation pattern. These results show that replacing the entire ground surface with a partial ground structure is the decisive factor in achieving a truly ultra-wide response that surpasses the results of recent published research in the same field, which qualifies this design for modern applications without increasing the overall area.

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