Theoretical Modeling and Design Guidelines for a New Class of Wearable Bio-Matched Antennas
Theoretical Modeling and Design Guidelines for a New Class of Wearable Bio-Matched Antennas
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DOI：
10.1109/tap.2019.2948727
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发表时间：
2020-03-01
影响因子：
5.7
通讯作者：
Kiourti, Asimina
中科院分区：
文献类型：
--
作者：
Blauert, John;Kiourti, Asimina
我们提出了生物匹配天线（BMAs）的理论建模和设计指南，这是一类新兴的可穿戴式体内天线，在带宽和增益方面超越了最先进的水平。简而言之，BMA是一种超宽带的、椭圆形的天线，它利用水和塑料的周期性组合来提高性能。新的建模可以为辐射测量、植入遥测等各种应用提供定制性能。我们的研究利用比较的BMA的圆锥形天线模型的低频截止。此外，我们进行了一个平面波展开方法分析的工程周期性的1）模型的高频截止的BMA和2）预测的介电常数的生物匹配的电介质。进一步进行参数研究，以评估作为BMA高度的函数的传输损耗。我们验证我们的设计框架，通过一种新的BMA，工作频率为1至12 GHz，21.4 dB的传输损耗通过3厘米的组织在2.4 GHz。与之前报道的最宽带和最高效的体内辐射器相比，这具有6.2 dB的传输损耗，新设计的带宽也几乎是其两倍。
We present theoretical modeling and design guidelines for bio-matched antennas (BMAs), an emerging class of wearable, into-body antennas that surpass the state of the art in terms of bandwidth and gain. In brief, BMAs are ultra-wideband, pyramid-shaped antennas that utilize the periodic combination of water and plastic to enhance performance. The new modeling enables customized performance for applications as diverse as radiometry, telemetry with implants, and more. Our studies utilize the comparison of the BMA to a conical antenna to model the low-frequency cutoff. In addition, we conduct a plane wave expansion method analysis of the engineered periodic dielectrics to 1) model the high-frequency cutoff of the BMA and 2) predict the permittivity of the bio-matched dielectric. Parametric studies are further pursued to assess transmission loss as a function of the BMA's height. We verify our design framework through a novel BMA that operates from 1 to 12 GHz with 21.4 dB of transmission loss through 3 cm of tissue at 2.4 GHz. Compared to the most wideband and most efficient into-body radiator previously reported, this has 6.2 dB less transmission loss, with the new design also exhibiting nearly twice as much bandwidth.