Low-Profile Monopole Antenna Design with Dual Notch Bands and Ultra-Wide Impedance Bandwidth

This study presents an ultra-wideband (UWB) monopole antenna with dual band-notched characteristics for future wireless communications. Its structure contains modified circular radiation patch with an embedded rectangular stub and also a pair of modified slits. The results indicate that the antenna operates at frequencies 3–11 GHz, covering the UWB spectrum (3.1–10.6 GHz). Additionally, two notched characteristics have been achieved at 3.5 GHz (3.3–3.7 GHz) and 5.5 GHz (5-6 GHz) using modified radiation stub resonators to suppress the interfaces from the wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX). The introduced design is examined in terms of its fundamental characteristics. It has been determined that sufficient frequency response, radiation patterns, efficiency, and gain are all achievable with the planned UWB antenna design. The proposed antenna system meets the requirements well for UWB applications.