On-Body Wearable Repeater as a Data Link Relay for In-Body Wireless Implants
On-Body Wearable Repeater as a Data Link Relay for In-Body Wireless Implants
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DOI：
10.1109/lawp.2013.2237880
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发表时间：
2012-01-01
影响因子：
4.2
通讯作者：
Rogier, Hendrik
中科院分区：
文献类型：
--
作者：
Agneessens, Sam;Van Torre, Patrick;Rogier, Hendrik
植入人体不同部位的无线医疗设备有着广泛的应用范围。然而，2.4 GHz 工业、科学和医疗频段的高数据速率通信会遭受高体内衰减损失。链路改善不能通过简单地增加发射功率来实现，因为电池寿命有限并且体内吸收必须保持较低水平。为了克服这些问题，设计和开发了一种灵活的贴体纺织贴片天线，可直接与人体牢固匹配，作为可穿戴中继器的一部分，增强与植入无线设备的通信。这种接收天线可以应对不同的形态和患者的运动，从而实现与植入物的可靠的高数据速率和低功耗通信链路。对放置在人体躯干上的体上中继器系统进行数据链路测量，将信号中继到附近的医疗设备，无需与患者进行有线连接。在不同的测量场景下对数据链路的性能进行实验评估。对于依靠简单模拟放大的中继器系统来说，成本低、节能且可以完全集成到服装中，获得了优异的结果，对于深度达 85 毫米的组织，平均测量信噪比为 33 dB。
Wireless medical devices implanted at different locations in the human body have a wide application range. Yet, high-data-rate communication in the 2.4-GHz Industrial, Scientific, and Medical band suffers from high in-body attenuation loss. Link improvement cannot be obtained by simply increasing transmit power, as battery life is limited and in-body absorption has to remain low. To overcome these problems, a flexible on-body textile patch antenna, robustly matched directly to the human body, is designed and developed as part of a wearable repeater, enhancing communication with implanted wireless devices. This receive antenna, which can cope with different morphologies and patient movements, enables reliable high data rate and low-power communication links with an implant. A data link measurement is performed for the on-body repeater system placed on the human torso, relaying the signals to nearby medical equipment, without wired connection to the patient. The performance of the data link is experimentally assessed in different measurement scenarios. For a repeater system relying on simple analog amplification, which is low-cost, energy-efficient, and can be fully integrated into clothing, excellent results are obtained, with an average measured signal-to-noise ratio of 33 dB for tissue depths up to 85 mm.