Optimisation of compact UWB circularly polarised antenna

This study shows a compact and ultra-wideband (UWB) circularly polarised antenna designed to meet demands of modern wireless communication systems. By incorporating a novel semi-circular slot and innovative decoupling elements, the antenna achieves wideband operation, high isolation, and a miniaturised footprint. Simulations by the software ANSYS HFSS show excellent impedance matching, broad axial ratio bandwidth (ARBW), and stable gain across a wide frequency range. Experimental results further verify its potential for 5G networks and satellite navigation applications. The antenna has a compact structure, high radiation efficiency and effective decoupling strategy, which provides a reference scheme for the further development of wireless communication system.