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Dr. Islam Mansour Abdelfattah Abdelrahman :: Publications: |
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| Title: | Improvement of Magnetic Field for Near-Field
WPT System Using Two Concentric Open-Loop
Spiral Resonators |
| Authors: | Mohamed Aboualalaa , Islam Mansour, Adel Barakat , Kuniaki Yoshitomi, and Ramesh K. Pokharel |
| Year: | 2020 |
| Keywords: | Capacitive coupling feeding, charging distance, near-field wireless power transfer (WPT), open-loop spiral resonator (OLSR), power transfer efficiency (PTE). |
| Journal: | IEEE Microwave and Wireless Components Letters |
| Volume: | Not Available |
| Issue: | Not Available |
| Pages: | 1-4 |
| Publisher: | IEEE |
| Local/International: | International |
| Paper Link: | |
| Full paper | Islam Mansour Abdelfattah Abdelrahman_Improvement of Magnetic Field for Near-Field.pdf |
| Supplementary materials | Not Available |
| Abstract: |
This letter introduces two concentric open-loop spiral resonators (OLSRs) that are used to improve magnetic field for nonradiative wireless power transfer (WPT) systems. OLSRs are fed through metal–insulator–metal (MIM) capacitive coupling using a 50- microstrip transmission line. First, a single OLSR is designed and implemented for WPT, then two OLSRs are used instead of a single OLSR to emphasize the surface current on the spiral resonators. Therefore, it helps to intensify the electromagnetic field in order to get a high transmission distance or higher efficiency. The proposed WPT system operates at 438.5 MHz with a measured power transfer efficiency (PTE) of 70.8% at a transmission distance of 31 mm and a design area of 576 mm2. An equivalent circuit of the proposed WPT system is presented as a heuristic approach to show the electrical behavior of the WPT system. |
