Broadband Multi-Shaped Metasurface Circularly Polarized Antenna With Suppressed Non-CP Radiation Modes

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dc.contributor.authorSupreeyatitikul, Nathapat
dc.contributor.authorLertwiriyaprapa, Titipong
dc.contributor.authorChudpooti, Nonchanutt
dc.contributor.authorKrairiksh, Monai
dc.contributor.authorPhongcharoenpanich, Chuwong
dc.date.accessioned2026-08-06T10:39:27Z
dc.date.available2026-08-06T10:39:27Z
dc.date.issued2023-01-01
dc.description.abstractIn this research, a multi-shaped metasurface broadband circularly polarized (CP) patch antenna with parasitic elements is proposed for 5G new radio (NR) applications. The proposed metasurface CP patch antenna comprises triple-layered substrates without air gap. The upper layer sits with multi-shaped metasurface elements and parasitic patches. The middle layer consists of an L-shaped slot functioning as the ground plane, and the lower layer contains a microstrip and a fan-shaped stub functioning as the feed line. The proposed metasurface CP patch antenna with parasitic elements is evaluated using characteristic mode analysis (CMA). The CMA results indicate that the modal significance of Modes 1 and 2 of the multi-shaped metasurface CP antenna are orthogonal, giving rise to circular polarization. The non-CP radiation of Modes 3 and 4 are suppressed by using the multi-shaped metasurface elements and parasitic patches. The measured impedance bandwidth and axial ratio bandwidth are 42.85% (3.4 - 4.9 GHz) and 38% (3.27 - 4.6 GHz), achieving the maximum gain of 7.23 dBic at 3.7 GHz. The experiments demonstrate that the multi-shaped metasurface CP patch antenna with parasitic elements is suitable for 5G NR wireless applications. The novelty of this study is attributed to its utilization of multi-shaped metasurface elements and parasitic patches, which effectively suppress non-circularly polarized radiation modes.
dc.identifier.citationIEEE Open Journal of Antennas and Propagation, 4, 900-911, 2023
dc.identifier.doi10.1109/OJAP.2023.3314770
dc.identifier.issn26376431
dc.identifier.other2-s2.0-85171590162
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/13881
dc.sourceIEEE Open Journal of Antennas and Propagation
dc.subjectCharacteristic mode analysis
dc.subjectimpedance
dc.subjectmetasurfaces
dc.subjectpatch antennas
dc.subjectsubstrates
dc.titleBroadband Multi-Shaped Metasurface Circularly Polarized Antenna With Suppressed Non-CP Radiation Modes
dc.typeArticle

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