Bipolar Spiral Midfield Wireless Power Transfer for Cardiac Implants Application
| Autor: | Chulhun Seo, Hoang Le-Huu |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | IEEE Antennas and Wireless Propagation Letters. 20:1631-1635 |
| ISSN: | 1548-5757 1536-1225 |
| DOI: | 10.1109/lawp.2021.3092011 |
| Popis: | This letter proposes a midfield wireless power transfer system using a bipolar spiral-shape transmitter (BPSP-Tx) for cardiac implants application. Optimal current distribution is built on BPSP-Tx surface following spiral structure to generate a focused field inside human tissue and adapt the implantable receiver (Rx) misalignments. Source performance has been verified by implantable hooked-shape Rx (HKSD-Rx) that separated at a distance of 45 mm from Tx. Measurements are conducted in minced pork for validation. Experimental results show that the transmission coefficient can achieve −20.48 dB at a distance of 45 mm and −22.15 at 60 mm. Furthermore, the Rx misalignment is verified by output power level, which shows that the proposed system can maintain high performance on a rotation range of Rx from $-90^\circ$ to $90^\circ$ . Finally, the human safety regulations are verified to present a low specific absorption rate, which demonstrates the potential for cardiac implants. |
| Databáze: | OpenAIRE |
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