Analysis of Wireless Power Transfer between Near-Field Antennas Using the Bi-Characteristic-Impedance Transmission Line (BCITL) Model

Simple item page
dc.contributor.authorPhaebua, Kittisak
dc.contributor.authorPhongcharoenpanich, Chuwong
dc.contributor.authorLertwiriyaprapa, Titipong
dc.contributor.authorTorrungrueng, Danai
dc.contributor.authorChou, Hsi Tseng
dc.date.accessioned2026-08-06T10:50:09Z
dc.date.available2026-08-06T10:50:09Z
dc.date.issued2025-01-01
dc.description.abstractAnalysis of wireless power transfer (WPT) between near-field (NF) antennas is proposed by using a bi-characteristic- impedance transmission line (BCITL) model. In particular, misalignment between small NF transmitting (TX) and receiving (RX) antennas degrades the power transfer efficiency (PTE). The proposed novel optimization procedure, based on the BCITL model, effectively maximizes WPT area, which is strongly influenced by antenna characteristics, the RX antenna's position, and the load reflection coefficient (Γ<inf>L</inf>) at each misaligned position. In such misalignment, Γ<inf>L</inf> ≠ 0, which is a crucial parameter in impedance matching to broaden the WPT area. This letter investigates the Γ<inf>L</inf> impact on the PTE at misaligned positions based on BCITL parameters, providing a new optimization framework that adapts to varying degrees of misalignment. In simulation and measurement validation, it is demonstrated that this BCITL model may estimate an optimal Γ<inf>L</inf> (Γ<inf>L</inf> ≠ 0) to produce WPT areas much broader than those using the conventional matching condition (Γ<inf>L</inf> = 0).
dc.identifier.citationIEEE Antennas and Wireless Propagation Letters, 24(8), 2192-2196, 2025
dc.identifier.doi10.1109/LAWP.2025.3558525
dc.identifier.issn15361225
dc.identifier.other2-s2.0-105002683380
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/16717
dc.sourceIEEE Antennas and Wireless Propagation Letters
dc.subjectAntenna matching circuit
dc.subjectbi-characteristic-impedance
dc.subjectnear-field communication
dc.subjectwireless power transfer (WPT)
dc.titleAnalysis of Wireless Power Transfer between Near-Field Antennas Using the Bi-Characteristic-Impedance Transmission Line (BCITL) Model
dc.typeArticle

Files

Collections

Research