{"title":"Efficient Magnetic Resonance SIMO WPT Insensitive to Load Impedance at Short Distances","authors":"B. Choi, Jeong‐Hae Lee","doi":"10.1109/LMWC.2022.3187609","DOIUrl":null,"url":null,"abstract":"In general, it is known that magnetic induction (MI) wireless power transfer (WPT) is used at a short distance (~several millimeters) and magnetic resonance (MR) WPT is applied at a longer distance (more than several tens of centimeters). In this letter, it is shown that the MR coil can be robustly designed to have higher efficiency, even when the load impedance changes significantly at short distances. The simulated power transfer efficiencies of MI and MR coil show that the MR coil was more insensitive to load impedance than the MI coil. A 1:4 single input and multiple output (SIMO) MR coil wasdesigned and fabricated. Its performance with the variation of load impedance was verified through measurement.","PeriodicalId":13130,"journal":{"name":"IEEE Microwave and Wireless Components Letters","volume":"32 1","pages":"1463-1466"},"PeriodicalIF":2.9000,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Microwave and Wireless Components Letters","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1109/LMWC.2022.3187609","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
In general, it is known that magnetic induction (MI) wireless power transfer (WPT) is used at a short distance (~several millimeters) and magnetic resonance (MR) WPT is applied at a longer distance (more than several tens of centimeters). In this letter, it is shown that the MR coil can be robustly designed to have higher efficiency, even when the load impedance changes significantly at short distances. The simulated power transfer efficiencies of MI and MR coil show that the MR coil was more insensitive to load impedance than the MI coil. A 1:4 single input and multiple output (SIMO) MR coil wasdesigned and fabricated. Its performance with the variation of load impedance was verified through measurement.
期刊介绍：
The IEEE Microwave and Wireless Components Letters (MWCL) publishes four-page papers (3 pages of text + up to 1 page of references) that focus on microwave theory, techniques and applications as they relate to components, devices, circuits, biological effects, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, medical and industrial activities. Microwave theory and techniques relates to electromagnetic waves in the frequency range of a few MHz and a THz; other spectral regions and wave types are included within the scope of the MWCL whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design.
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