Near-Field Inductive-Coupling Link to Power a Three-Dimensional Millimeter-Size Antenna for Brain Implantable Medical Devices
Near-Field Inductive-Coupling Link to Power a Three-Dimensional Millimeter-Size Antenna for Brain Implantable Medical Devices
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DOI：
10.1109/tbme.2017.2778729
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发表时间：
2018-01-01
影响因子：
4.6
通讯作者：
Abbosh, Amin
中科院分区：
文献类型：
--
作者：
Manoufali, Mohamed;Bialkowski, Konstanty;Abbosh, Amin
目的：近场感应耦合链路可以基于法拉第感应定律为无电池植入式医疗设备建立可靠的电源。研究方法：在本文中，一个离体环形天线和0.9毫米（3）的三维（3-D）领结脑植入天线之间的电感耦合链路的设计，建模和实验验证。为了确保设计的可靠性，植入式天线被嵌入到真实人体头部模型的脑脊液中。根据IEEE安全标准，对频散头部模型中的近电磁场进行了暴露、温度和传播模拟。一致地，提出了植入式天线的制造过程，该过程可以扩展到设计和实现不同的3-D几何形状。结果如下：在生物环境中测试了所提出的感应链路的性能;在猪的头部和小猪中进行了制造原型的体外测量。链路增益的测量结果表明，在猪头中为-35.83 dB，在小猪中为-30.81 dB。重要性：体外测量结果表明，所提出的三维植入式天线是适合于与小型化的无电池脑植入式医疗设备（BIMD）集成。
Objective: Near-field inductive-coupling link can establish a reliable power source to a batteryless implantable medical device based on Faraday's law of induction. Methods: In this paper, the design, modeling, and experimental verification of an inductive-coupling link between an off-body loop antenna and a 0.9 mm(3) three-dimensional (3-D) bowtie brain implantable antenna is presented. To ensure reliability of the design, the implantable antenna is embedded in the cerebral spinal fluid of a realistic human head model. Exposure, temperature, and propagation simulations of the near electromagnetic fields in a frequency-dispersive head model were carried out to comply with the IEEE safety standards. Concertedly, a fabrication process for the implantable antenna is proposed, which can be extended to devise and miniaturize different 3-D geometric shapes. Results: The performance of the proposed inductive link was tested in a biological environment; in vitro measurements of the fabricated prototypes were carried in a pig's head and piglet. The measurements of the link gain demonstrated -35.83 dB in the pig's head and -30.81 dB in piglet. Significance: The in vitro measurement results showed that the proposed 3-D implantable antenna is suitable for integration with a miniaturized batteryless brain implantable medical device (BIMD).