Performance Analysis of MICS-Based RF Wireless Power Transfer System for Implantable Medical Devices
Performance Analysis of MICS-Based RF Wireless Power Transfer System for Implantable Medical Devices
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DOI：
10.1109/access.2019.2891815
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发表时间：
2019-01-01
期刊：
影响因子：
3.9
通讯作者：
Yakovlev, Alex
中科院分区：
文献类型：
--
作者：
Abdulfattah, Ahmad N.;Tsimenidis, Charalampos C.;Yakovlev, Alex
在医学应用中，植入设备用于测量人体生物信号并将其远程传输到离体设备。迄今为止，为植入式医疗器械（IMD）提供恒定和永久的能源仍然是一个持续的挑战。因此，远场射频供电，代表接入点（AP），结合能量收集能力部署在本文中的IMD的连续供电。在这方面，理论分析用于建立安全供电条件，以符合由联邦通信委员会建立的安全限制。通过推导中断概率和平均收获能量的解析闭合形式表达式，研究了向IMD进行无线功率传输的可行性，并利用Monte Carlo仿真对两者进行了验证。本文的研究结果表明，AP和身体表面之间的距离不超过0.5 m，因为系统性能已经经历了超过此值的高中断概率，而在403 MHz的电源频率下，最小允许距离为17 cm。还提出了AP应配备有0.4W的最小发射功率，以便将能量收集的中断概率保持为小于10（-1）。
In medical applications, implant devices are used to measure and remotely transmit the human biological signals to off-body devices. To date, providing the implantable medical devices (IMDs) with a constant and perpetual energy source remains an ongoing challenge. Accordingly, a far-field radio-frequency powering, represented by an access point (AP), in conjunction with energy-harvesting capability is deployed in this paper for continuous powering of the IMDs. In this respect, theoretical analysis is used to establish safe powering conditions in order to comply with the safety limits established by the Federal Communications Commission. The feasibility of the wireless power transfer to the IMDs is investigated by deriving the analytical closed-form expressions for outage probability and average harvested energy, both of which are validated with Monte Carlo simulations. The findings of this paper suggest not to exceed a distance of 0.5 m between the AP and the body surface, as the system performance has experienced high outage probability beyond this value, while the minimum allowable distance is 17 cm at a powering frequency of 403 MHz. It is also presented that the AP should be equipped with a minimum transmit power of 0.4 W in order to maintain an outage probability for the energy harvesting to be less than 10(-1).