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用于生物遥测物联网医疗设备的高效中场无线电力传输系统的开发。

Development of an efficient mid-field wireless power transmission system for biotelemetric IoT medical devices.

作者信息

Abbas Naeem, Basir Abdul, Ali Shah Izaz, Rizqi Iman Usman, Yoo Hyoungsuk

机构信息

Department of Electronic Engineering, Hanyang University, Seoul, 04763, South Korea.

Department of Biomedical Engineering, Hanyang University, Seoul, 04763, South Korea.

出版信息

Sci Rep. 2025 Apr 28;15(1):14889. doi: 10.1038/s41598-025-99609-1.

DOI:10.1038/s41598-025-99609-1
PMID:40295706
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12037764/
Abstract

Wireless power transfer (WPT) technology facilitates Internet of Things medical devices (IoTMDs) for healthcare monitoring by providing reliable, continuous, and non-invasive power sources. This paper presents an efficient WPT system featuring a flexible receiver ([Formula: see text]) antenna integrated with an efficient rectifier and a flexible transmitter ([Formula: see text]) antenna operating in the midfield band of 1.5 GHz. The implantable [Formula: see text] antenna has a small footprint with a volume of 4.9 [Formula: see text] and can be easily fitted within miniaturized IoTMDs. Extensive simulations and measurement analyses were performed to validate the versatility of the system. The [Formula: see text] antenna exhibited a measured - 10 dB bandwidth of 130 MHz (1.43-1.56 GHz), whereas the rectifier demonstrated a peak measured efficiency of 80% at an input power of 0 dBm. The flexible and conformal nature of the [Formula: see text] facilitates wireless power transmission by enhancing comfort and coupling to nonplanar body surfaces. Remarkably, the system yielded a measured transmission coefficient ([Formula: see text]) of - 22.5 dB at a distance of 51 mm without the use of any additional intermediate structures, such as matching layers, metamaterials, and metasurfaces. For safety reasons, the specific absorption rate was analyzed and confirmed to be within acceptable limits. Furthermore, real-time wireless power transmission capabilities and the potential for operating IoTMDs were demonstrated. In this demonstration, the rectenna's output was used to power an IoT-based temperature sensor-integrated communication module, showcasing the real-time functionality and capability of the proposed WPT system for wirelessly powering IoTMDs.

摘要

无线功率传输（WPT）技术通过提供可靠、持续且无创的电源，为医疗物联网设备（IoTMDs）的医疗保健监测提供了便利。本文提出了一种高效的WPT系统，该系统具有一个集成了高效整流器的柔性接收器（[公式：见原文]）天线和一个在1.5 GHz中场频段工作的柔性发射器（[公式：见原文]）天线。可植入的[公式：见原文]天线占地面积小，体积为4.9 [公式：见原文]，并且可以轻松安装在小型化的IoTMDs中。进行了广泛的仿真和测量分析，以验证该系统的通用性。[公式：见原文]天线测得的 - 10 dB带宽为130 MHz（1.43 - 1.56 GHz），而整流器在输入功率为0 dBm时测得的峰值效率为80%。[公式：见原文]的柔性和保形特性通过提高舒适度并与非平面身体表面耦合，促进了无线功率传输。值得注意的是，该系统在不使用任何额外中间结构（如匹配层、超材料和超表面）的情况下，在51 mm的距离处测得的传输系数（[公式：见原文]）为 - 22.5 dB。出于安全考虑，对比吸收率进行了分析，并确认其在可接受的范围内。此外，还展示了实时无线功率传输能力以及运行IoTMDs的潜力。在该演示中，整流天线的输出用于为基于物联网的集成温度传感器的通信模块供电，展示了所提出的WPT系统为IoTMDs无线供电的实时功能和能力。

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