E-Textile Origami Dipole Antennas With Graded Embroidery for Adaptive RF Performance
E-Textile Origami Dipole Antennas With Graded Embroidery for Adaptive RF Performance
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DOI：
10.1109/lawp.2018.2871643
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发表时间：
2018-12-01
影响因子：
4.2
通讯作者：
Kiourti, Asimina
中科院分区：
文献类型：
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作者：
Alharbi, Saad;Chaudhari, Shreyas;Kiourti, Asimina
我们提出了一种新的基于折纸的可重构天线，该天线由刺绣导电E线组成。用于实现折纸天线的最先进技术使用易碎的导电油墨和/或铜带。相比之下，由于E螺纹的固有强度，所提出的方法提供了增强的健壮性和耐用性。为了便于沿折痕折叠，同时提供接近铜的射频(RF)性能，提出了一种分级刺绣工艺。分级方案在天线上使用7个E线/mm的密度，在折痕周围使用较低的密度(在本研究中最少为1个E线/mm)。手风琴偶极天线在760至1015 MHz范围内可调谐的概念验证结果显示，所有电子纺织原型和铜等效物的模拟和测量之间具有很好的一致性。值得注意的是，折痕处的刺绣密度可以降低到低至1E线/毫米，而不会明显降低射频性能。总体而言，电子纺织折纸天线可能会改变可重新配置天线在可穿戴和结构应用中的机会。
We present a new class of reconfigurable origami-based antennas formed by embroidered conductive E-threads. State-of-the-art techniques used to realize origami antennas employ fragile conductive inks and/or copper tape. By contrast, the proposed approach brings forward enhanced robustness and durability as attributed to the inherent strength of the E-threads. To facilitate folding along the creases while also providing the radio frequency (RF) performance close to that of copper, a graded embroidery process is proposed. The grading scheme uses a density of 7 E-threads/mm on the antenna and a reduced density around the creases (as few as 1 E-thread/mm in this study). Proof-of-concept results for an accordion-based dipole antenna tunable from 760 to 1015 MHz show excellent agreement between simulations and measurements for all E-textile prototypes and the copper equivalent. Notably, embroidery density at the creases can be reduced to as low as 1 E-thread/mm without apparent degradation in the RF performance. Overall, the E-textile origami antennas may transform opportunities for reconfigurable antennas to be leveraged in wearable and structural applications.