In this paper, a novel four-layered low-profile, textile antenna operating in the Industrial Scientific and Medical band (ISM) has been proposed for wearable applications. The proposed antenna was completely made from textile materials with the substrate being cotton and the conductive portions done by embroidering Zari threads to the substrate. The realized antenna has a compact profile of 51 mm x 45 mm x 0.785 mm. To improve the return loss and gain, a rectangular slot of dimension 10 mm x 10 mm was introduced. On-body analysis also shows that the antenna has powerful performance with specific absorption rates well below the threshold specified by International Electrotechnical Commission (IEC) for 1g and 10g tissue. In addition to validate the design, real-time deployment with a Particle Photon was done to continuously monitor the heart rate and upload it to the Particle app via cloud. The fabricated antenna was also evaluated under bent, crumpled, moisture absorbed and on-body conditions where the antenna performance was measured by Signal to Noise Ratio (SNR), Received Signal Strength Indicator (RSSI) of the network connected to and the round-trip time taken by the device to successfully respond to the Constrained Application Protocol (CoAP) message sent by the Particle Cloud. On analysis, it was seen that the performance of the antenna was unaffected by the deformations induced making it best suited for on-body applications.

在本文中，提出了一种用于可穿戴应用的新型四层薄型纺织天线，该天线在工业科学和医学频段 (ISM) 中运行。拟议的天线完全由纺织材料制成，基材为棉，导电部分通过在基材上绣扎里线完成。实现的天线具有 51 mm x 45 mm x 0.785 mm 的紧凑外形。为了改善回波损耗和增益，引入了尺寸为 10 mm x 10 mm 的矩形槽。人体分析还表明，该天线具有强大的性能，其比吸收率远低于国际电工委员会 (IEC) 为 1g 和 10g 组织规定的阈值。除了验证设计，使用 Particle Photon 进行实时部署以持续监测心率并通过云将其上传到 Particle 应用程序。制造的天线还在弯曲、起皱、吸湿和贴身条件下进行了评估，其中天线性能通过所连接网络的信噪比 (SNR)、接收信号强度指示器 (RSSI) 和往返来衡量设备成功响应粒子云发送的约束应用协议 (CoAP) 消息所花费的时间。分析表明，天线的性能不受所引起的变形的影响，因此最适合贴身应用。天线性能通过信噪比 (SNR)、所连接网络的接收信号强度指示器 (RSSI) 以及设备成功响应受限信号所需的往返时间来测量吸湿和体表条件粒子云发送的应用程序协议 (CoAP) 消息。分析表明，天线的性能不受所引起的变形的影响，因此最适合贴身应用。天线性能通过信噪比 (SNR)、所连接网络的接收信号强度指示器 (RSSI) 以及设备成功响应受限信号所需的往返时间来测量吸湿和体表条件粒子云发送的应用程序协议 (CoAP) 消息。分析表明，天线的性能不受所引起的变形的影响，因此最适合贴身应用。