Year: 2026
Type: article
Abstract: ABSTRACT Sufficient electromagnetic isolation between the feeding ports is necessary in shared‐aperture patch antennas, where ports are closely configured to feed a single patch radiator. This letter presents a multi‐feeding co‐aperture circular patch antenna layout with hardware‐level self‐decoupling features for pattern diversity applications. A central “Y”‐shaped slot physically divides the radiating patch into three equal sectors, effectively suppressing the direct surface current coupling paths between adjacent ports. The configuration achieves an isolation of more than 15 dB across the active ports within the targeted band. Each independent port excites a sectoral fan beam with the beamwidth of 120, and the multi‐beam combination achieves omni‐directional radiation coverage in the azimuth plane. The cross‐polarisation is 25 dB lower than the copolar component in the far field. The rotationally symmetric design provides a nearly flat gain in the desired direction while effectively suppressing mutual coupling between the ports, making it a promising candidate for pattern‐reconfigurable wireless networks and indoor positioning frontends where more than one port is required.
Source: Electronics Letters
DOI: 10.1049/ell2.70709
Institutions: Nantong University, University College London
Language: English
Topic: Antenna Design and Analysis
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,590
OpenAlex ID: W7204496181