In this article, a novel dual-polarized embroidered textile antenna array with an omnidirectional radiation pattern is proposed for both on- and off-body wearable applications. The flexible antenna is composed of a group of circularly oriented dual-polarized patch antennas excited with uniform amplitude and phase. The antenna array can be wrapped around a cylinder, such as an arm or a leg, for realizing a quasi-omnidirectional radiation pattern in the azimuthal plane, which is highly desirable in both on-body and off-body wearable applications. The operating principles and design consideration for how to achieve the omnidirectional radiation and how to avoid radiation nulls are investigated in detail. Moreover, these analytical studies are verified through the experimental results. In addition, a dual orthogonal polarization capability is employed to improve the link reliability. Due to the high front-to-back ratio (FBR) exhibited by each patch antenna element, the proposed omnidirectional antenna array also features a low specific absorption rate (SAR) and high efficiency, which are extremely important for wearable applications. As a proof-of-concept, an antenna array prototype operating at 5.8 GHz is designed, fabricated, and tested. The measured results agree reasonably well with the simulations in terms of S-parameters, polarization isolation, and radiation patterns, demonstrating that the proposed antenna array is ideally suited for potential wearable applications.

中文翻译：

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具有全向辐射的双极化刺绣纺织臂带天线阵列，适用于身体/离体可穿戴应用

在本文中，提出了一种具有全向辐射模式的新型双极化刺绣纺织天线阵列，适用于体上和离体可穿戴应用。柔性天线由一组以均匀幅度和相位激励的圆形定向双极化贴片天线组成。天线阵列可以缠绕在一个圆柱体上，例如手臂或腿，以实现方位平面内的准全向辐射模式，这在身体上和离体可穿戴应用中都是非常理想的。详细研究了如何实现全向辐射以及如何避免辐射零点的工作原理和设计考虑。此外，这些分析研究通过实验结果得到验证。此外，采用双正交极化能力提高链路可靠性。由于每个贴片天线元件表现出高前后比（FBR），所提出的全向天线阵列还具有低比吸收率（SAR）和高效率的特点，这对于可穿戴应用非常重要。作为概念验证，设计、制造和测试了在 5.8 GHz 下运行的天线阵列原型。测量结果在 S 参数、极化隔离和辐射方向图方面与模拟相当吻合，表明所提出的天线阵列非常适合潜在的可穿戴应用。所提出的全向天线阵列还具有低比吸收率 (SAR) 和高效率的特点，这对于可穿戴应用极为重要。作为概念验证，设计、制造和测试了在 5.8 GHz 下运行的天线阵列原型。测量结果在 S 参数、极化隔离和辐射模式方面与模拟相当吻合，表明所提出的天线阵列非常适合潜在的可穿戴应用。所提出的全向天线阵列还具有低比吸收率 (SAR) 和高效率的特点，这对于可穿戴应用极为重要。作为概念验证，设计、制造和测试了在 5.8 GHz 下运行的天线阵列原型。测量结果在 S 参数、极化隔离和辐射方向图方面与模拟相当吻合，表明所提出的天线阵列非常适合潜在的可穿戴应用。