A novel dual-port textile antenna with a low profile and enhanced bandwidth is proposed for 2.45 GHz IMS-band full-duplex wearable applications. The antenna is developed on a textile material by using an advanced screen-printing technology and, thus, exhibits a very good structural flexibility and a high manufacturing accuracy. To improve the bandwidths at the two input ports, an innovative method is introduced for the first time where two additional strips are incorporated into the antenna design. These additional strips are placed perpendicularly to the feed lines to generate another resonant frequency, which is then combined with the fundamental mode of the patch antenna, producing the second-order resonant properties with enhanced bandwidths. The proposed strips are also beneficial to significantly improve the isolation between the two channels/ports. To maintain a robust linkage, a study of structural deformation is carried out by bending the antenna along both the 0° and 45° directions. The experimental results also show that the antenna is robust to the human tissue loading, where the specific absorption rate (SAR) is lower than 0.37 W/kg when the antenna is fully attached. The measured results agree reasonably well with the simulations providing experimental verification of the design concept. The antenna is believed to be the first dual-mode textile antenna of its type which features a low profile, improved bandwidth, high isolation, and low cost, making it a good candidate for potential full-duplex wearable applications.

中文翻译：

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用于全双工可穿戴应用的具有增强带宽和隔离性的薄型带状纺织天线

为 2.45 GHz IMS 频段全双工可穿戴应用提出了一种具有低剖面和增强带宽的新型双端口纺织天线。该天线采用先进的丝网印刷技术在纺织材料上开发，因此具有非常好的结构灵活性和高制造精度。为了提高两个输入端口的带宽，首次引入了一种创新方法，即在天线设计中加入了两个额外的条带。这些额外的条带垂直于馈线放置以产生另一个谐振频率，然后与贴片天线的基模结合，产生具有增强带宽的二阶谐振特性。建议的条带也有利于显着改善两个通道/端口之间的隔离。为了保持牢固的连接，通过沿 0° 和 45° 方向弯曲天线来进行结构变形研究。实验结果还表明，天线对人体组织载荷具有鲁棒性，当天线完全附着时，比吸收率 (SAR) 低于 0.37 W/kg。测量结果与提供设计概念的实验验证的模拟非常吻合。该天线被认为是同类产品中的第一个双模纺织天线，具有低剖面、更高的带宽、高隔离度和低成本的特点，使其成为潜在的全双工可穿戴应用的理想选择。通过沿 0° 和 45° 方向弯曲天线来进行结构变形研究。实验结果还表明，天线对人体组织载荷具有鲁棒性，当天线完全附着时，比吸收率 (SAR) 低于 0.37 W/kg。测量结果与提供设计概念的实验验证的模拟非常吻合。该天线被认为是同类产品中的第一个双模纺织天线，具有低剖面、更高的带宽、高隔离度和低成本的特点，使其成为潜在的全双工可穿戴应用的理想选择。通过沿 0° 和 45° 方向弯曲天线来进行结构变形研究。实验结果还表明，天线对人体组织载荷具有鲁棒性，当天线完全附着时，比吸收率 (SAR) 低于 0.37 W/kg。测量结果与提供设计概念的实验验证的模拟非常吻合。该天线被认为是同类产品中的第一个双模纺织天线，具有低剖面、更高的带宽、高隔离度和低成本的特点，使其成为潜在的全双工可穿戴应用的理想选择。其中，当天线完全连接时，比吸收率 (SAR) 低于 0.37 W/kg。测量结果与提供设计概念的实验验证的模拟非常吻合。该天线被认为是同类产品中的第一个双模纺织天线，具有低剖面、更高的带宽、高隔离度和低成本的特点，使其成为潜在的全双工可穿戴应用的理想选择。其中，当天线完全连接时，比吸收率 (SAR) 低于 0.37 W/kg。测量结果与提供设计概念的实验验证的模拟非常吻合。该天线被认为是同类产品中的第一个双模纺织天线，具有低剖面、更高的带宽、高隔离度和低成本的特点，使其成为潜在的全双工可穿戴应用的理想选择。