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Title: Optimisation of compact UWB circularly polarised antenna

Authors: Shanyue Guan; Shiyue Wu; Shaoshuai Liu; Zhiyong Zhao

Addresses: Guizhou Areospace Institute of Measuring and Testing Technology, Guiyang 550009, China ' Guizhou Areospace Institute of Measuring and Testing Technology, Guiyang 550009, China ' Jiangnan Design Institute of Machinery and Electricity, Guiyang 550009, China ' Department of Design, Manufacturing and Engineering Management, University of Strathclyde, Glasgow G1 1XQ, UK

Abstract: 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.

Keywords: circular polarisation antenna; ultra-wideband; compact; multiple-input multiple-output; MIMO; MIMO technology; neutralisation line decoupling.

DOI: 10.1504/IJICT.2025.146694

International Journal of Information and Communication Technology, 2025 Vol.26 No.18, pp.48 - 64

Received: 15 Apr 2025
Accepted: 29 Apr 2025
Published online: 13 Jun 2025 *