{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,16]],"date-time":"2026-06-16T05:43:27Z","timestamp":1781588607617,"version":"3.54.5"},"reference-count":34,"publisher":"AIP Publishing","issue":"5","funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61627901"],"award-info":[{"award-number":["61627901"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2021,5,1]]},"abstract":"<jats:p>A 6.78-MHz wireless power transfer (WPT) system can achieve a long transmission distance, which is based on magnetically coupled resonant technology. Due to its high quality factor coils, the system performance is greatly affected by position displacement. In this paper, a weakly coupled and distance-insensitive WPT system with a dual-coupled L-type matching network was proposed. To improve displacement tolerance, the proposed system used a dual mutual inductance matching network, which did not require feedback to change capacitance or inductance dynamically. To remain lightweight, printed multi-coils without ferrites were used. To obtain a higher efficiency over a weakly coupled distance, a series of parameters were optimized, i.e., the optimal dimension, the matching distance, and the real center. To verify the output performance in X\/Y\/Z-axis displacements, a prototype with a maximum output power of 50\u00a0W was created, and a DC\u2013DC efficiency of 75%\u201381% was achieved in a Z-axis displacement of \u00b115\u00a0mm and in an X\/Y-axis displacement of \u00b120\u00a0mm.<\/jats:p>","DOI":"10.1063\/5.0044619","type":"journal-article","created":{"date-parts":[[2021,5,7]],"date-time":"2021-05-07T09:39:18Z","timestamp":1620380358000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":5,"title":["A 6.78-MHz distance-insensitive wireless power transfer system with a dual-coupled L-type matching network"],"prefix":"10.1063","volume":"92","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3185-0684","authenticated-orcid":false,"given":"Gao","family":"Han","sequence":"first","affiliation":[{"name":"School of Aerospace Science and Technology, Xidian University , Xi\u2019an 710071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanming","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Aerospace Science and Technology, Xidian University , Xi\u2019an 710071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0871-0771","authenticated-orcid":false,"given":"Qian","family":"Li","sequence":"additional","affiliation":[{"name":"School of Aerospace Science and Technology, Xidian University , Xi\u2019an 710071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zikang","family":"Xing","sequence":"additional","affiliation":[{"name":"School of Aerospace Science and Technology, Xidian University , Xi\u2019an 710071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zheng","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Aerospace Science and Technology, Xidian University , Xi\u2019an 710071, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"317","published-online":{"date-parts":[[2021,5,7]]},"reference":[{"key":"2023080608304624700_c1","doi-asserted-by":"publisher","first-page":"18","DOI":"10.1109\/tmag.2015.2440481","article-title":"A promoted design for primary coil in roadway-powered system","volume":"51","year":"2015","journal-title":"IEEE Trans. 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