Wearable sensing technology and body-centric wireless systems have received widespread attention due to their tremendous prospective in e-health, the Internet of Things (IoT), and smart cities. Low-cost textile antennas for body-centric radio-frequency identification (RFID) sensing technology are the future for such wearable sensing systems. The antennas can sustain bending and stretching and offer a maintenance-free communication link with the human body, environment, and IoT infrastructure. Its sensing technology provides the seamless real-time wireless monitoring of important physiological signals. Understanding its significance in emerging applications, this article reviews wearable passive RFID tag sensors that monitor various physical parameters. The primary goal of these research works is to design RFID sensors and test their performances in various environmental conditions. Chip-based RFID sensors are too expensive for mass deployment, hence, chipless RFID tag sensors have become a low-cost and maintenance-free alternative, addressing market demands for the emerging IoT, where trillions of such sensors will be used. Observing the significance of the technology, a few important design parameters, such as tag radar cross section (RCS) and various form factors of tag antennas, are examined in this article. The article also presents some emerging applications of the developed sensors.

中文翻译：

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用于生物医学应用的可穿戴无芯片射频识别标签：综述 [天线应用专区]

可穿戴传感技术和以身体为中心的无线系统因其在电子健康、物联网 (IoT) 和智慧城市方面的巨大前景而受到广泛关注。用于以身体为中心的射频识别 (RFID) 传感技术的低成本纺织天线是此类可穿戴传感系统的未来。天线可以承受弯曲和拉伸，并提供与人体、环境和物联网基础设施的免维护通信链接。其传感技术提供重要生理信号的无缝实时无线监测。了解其在新兴应用中的重要性，本文回顾了可监测各种物理参数的可穿戴无源 RFID 标签传感器。这些研究工作的主要目标是设计 RFID 传感器并测试其在各种环境条件下的性能。基于芯片的 RFID 传感器对于大规模部署来说过于昂贵，因此，无芯片 RFID 标签传感器已成为一种低成本和免维护的替代方案，满足新兴物联网的市场需求，其中将使用数万亿个此类传感器。观察该技术的重要性，本文研究了一些重要的设计参数，例如标签雷达截面 (RCS) 和标签天线的各种形状因素。本文还介绍了开发的传感器的一些新兴应用。解决新兴物联网的市场需求，其中将使用数万亿个此类传感器。观察该技术的重要性，本文研究了一些重要的设计参数，例如标签雷达截面 (RCS) 和标签天线的各种形状因素。本文还介绍了开发的传感器的一些新兴应用。解决新兴物联网的市场需求，其中将使用数万亿个此类传感器。观察该技术的重要性，本文研究了一些重要的设计参数，例如标签雷达截面 (RCS) 和标签天线的各种形状因素。本文还介绍了开发的传感器的一些新兴应用。