IEEE Trans Biomed Circuits Syst. 2020 Dec;14(6):1160-1178. doi: 10.1109/TBCAS.2020.3038599. Epub 2020 Dec 31.
In neurostimulation, wireless power transfer is an efficient technology to overcome several limitations affecting medical devices currently used in clinical practice. Several methods were developed over the years for wireless power transfer. In this review article, we report and discuss the three most relevant methodologies for extremely miniaturised implantable neurostimulators: ultrasound coupling, inductive coupling and capacitive coupling. For each powering method, the discussion starts describing the physical working principle. In particular, we focus on the challenges given by the miniaturisation of the implanted integrated circuits and the related ad-hoc solutions for wireless power transfer. Then, we present recent developments and progresses in wireless power transfer for biomedical applications. Last, we compare each technique based on key performance indicators to highlight the most relevant and innovative solutions suitable for neurostimulation, with the gaze turned towards miniaturisation.
在神经刺激中，无线功率传输是一种有效的技术，可以克服目前临床实践中使用的医疗设备所面临的一些限制。多年来已经开发出了几种无线功率传输方法。在这篇综述文章中，我们报告并讨论了用于极小型植入式神经刺激器的三种最相关的方法：超声耦合、感应耦合和电容耦合。对于每种供电方法，讨论都从描述物理工作原理开始。特别是，我们专注于植入集成电路小型化带来的挑战，以及针对无线功率传输的专门解决方案。然后，我们介绍了生物医学应用中无线功率传输的最新进展和进展。最后，我们根据关键性能指标对每种技术进行比较，以突出最相关和创新的解决方案，这些解决方案适用于神经刺激，并着眼于小型化。
