A study on dual-sense broadband circularly polarised monopole antenna for UWB applications

The proposed work is designed with the embedded of stubs and Parasitic Strips (PSs) under the radiator. An FR4 substrate is used to design the antenna (εr = 4.4, h = 1.6 mm). The overall size of the antenna is 0.8 λ0 × 0.75 λ0 × 0.04 λ0, where λ0 is the free space wavelength at f0 = 7.5 GHz. Two orthogonal modes are generated with the same magnitude and 90° phase difference over the frequency band. The stubs and strips are used to maintain the EX and EY ratio for better Axial Ratio Bandwidth (ARBW). The measured impedance bandwidth of 7.74 GHz (3.9–11.64 GHz), 99.6%, two ARBW of 4.80 GHz (5.12–9.92 GHz), 63.83% and 0.75 GHz (11.1–11.85 GHz), 6.53% are achieved. The proposed antenna is preferred for the applications of 5.8 GHz ISM band, WiMAX (5.7–5.85 GHz), WLAN (5.2–5.8 GHz), Satellite (7.25–7.75 GHz, 7.9–8.4 GHz) and X-band (8–12 GHz). Copyright © 2024 Inderscience Enterprises Ltd.