High-Contrast Low-Loss Antenna: A Novel Antenna for Efficient Into-Body Radiation.
High-Contrast Low-Loss Antenna: A Novel Antenna for Efficient Into-Body Radiation.
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DOI：
10.1109/tap.2022.3188354
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发表时间：
2022-11
影响因子：
5.7
通讯作者：
Kiourti, Asimina
中科院分区：
文献类型：
--
作者：
Rice, Allyanna;Kiourti, Asimina
我们提出了一种生物相容性高对比度低损耗天线（HCLA），设计用于有效的体内辐射，应用于医疗遥测，传感和成像等多种应用。HCLA是可穿戴的，紧凑的尺寸为2.62 cm3，在1至5 GHz的带宽范围内工作。准领结天线加载高对比度（即高介电常数和低介电常数材料的交替层）和低损耗介电介质，以提高进入生物组织的方向性和增益。2.4 GHz的测量结果与模拟结果很好地吻合，与过去报道的最有效的入体散热器相比，传输损耗提高了5.72 dB。在高频带宽的高端，仿真结果显示，两根天线相互交叉放置，中间有组织，传输损耗改善了约12.5 dB。HCLA由稳定、低损耗的材料制成，在制造过程中具有可重复性和一致性，从而解决了当前最先进技术的局限性。它还由生物相容性材料制成，使其能够直接放置在皮肤上，以便在现实世界中实施。本文讨论了HCLA的工作原理、设计、传输性能、辐射方向图和比吸收率。
We present a biocompatible high-contrast low-loss antenna (HCLA) designed for efficient into-body radiation for applications as diverse as medical telemetry, sensing, and imaging. The HCLA is wearable with a compact size of 2.62 cm3 and operates across the 1 to 5 GHz bandwidth. The quasi-bowtie antenna is loaded with a high-contrast (i.e., alternating layers of high and low permittivity materials) and low-loss dielectric to improve directivity and gain into the biological tissues. Measurement results at 2.4 GHz are in good agreement with simulations and show 5.72 dB improvement in transmission loss over the most efficient into-body radiator reported in the past. At the high end of the frequency bandwidth, simulation results for two antennas placed across each other with tissue in between show ~12.5 dB improvement in transmission loss. The HCLA is fabricated with stable, low-loss materials that allow for repeatability and consistency in the fabrication process, thus, addressing limitations of the current state-of-the-art. It is also made from biocompatible materials that enable it to be placed directly on the skin for real-world implementation. In this paper, we discuss the operation principle and design of the HCLA, its transmission performance, radiation patterns, and specific absorption rate.
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