Monopole Antenna with Ultra-Wideband Characteristics for Broadband Communication Systems

Abstract

This study presents the design, simulation and performance evaluation of a transparent Ultra-wideband (UWB) monopole antenna employing a shrinked-trapezoidal defected ground structure (DGS) fabricated on a quartz substrate. The antenna was modeled and optimized using CST Studio Suite. A transparent quartz glass substrate was selected due to its low loss tangent and optical clarity, while a silver mesh was used as the conductive layer to preserve transparency and enhance conductivity. The design supports deployment on see-through surfaces such as glass panels, windshields, and display screens. Simulation results show an impedance bandwidth of 157%, spanning 1.52–12.58 GHz, which meets UWB specifications and enables applications in high-data-rate wireless communication, radar sensing, and Internet of Things (IoT) systems. Radiation characteristics including gain, efficiency, and polarization were analyzed, confirming stable omnidirectional patterns