Flexible and Wearable Dual-Band Differential Extraoral Antenna for eTDS Applications

IF 3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2023-03-09 DOI:10.1109/JERM.2023.3271459
Sarita Ahlawat;Binod Kumar Kanaujia;Karumudi Rambabu
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Abstract

Wearable assistive devices are essential for performance monitoring and inferring the tongue gestures of disabled individuals in medical rehabilitation. In this paper, a flexible and wearable differential extraoral antenna is proposed with dual resonances (915 MHz and 2.4 GHz) in the Industrial, Scientific, and Medical (ISM) band for extraoral tongue drive system (eTDS) applications. The size of the fabricated prototype of the extraoral differential antenna is (0.135 ${{\bm{\lambda }}}_{\bm{g}} \, \times\, $ 0.065 ${{\bm{\lambda }}}_{\bm{g}} \, \times \, $ 0.002 ${{\bm{\lambda }}}_{\bm{g}}$ ). The performance of the differential extraoral antenna is analysed using a realistic human head model. Further, the extraoral antenna is fabricated and experimentally validated its performance in the close vicinity of the artificial head model. The measured impedance bandwidth (≤ −10 dB) and peak gain values are 90 MHz and $ -$ 20.00 dBi, respectively, at 0.915 GHz; and 180 MHz and $ -\!$ 12.87 dBi, respectively, at 2.4 GHz. The specific absorption rate (SAR) parameter values have also been analyzed for both the resonating frequencies over 1 g and 10 g of mass tissue through simulations. Further, the link budget was theoretically calculated based on these acceptable SAR values. The proposed antenna could communicate effectively by eliminating balun's additional impedance mismatch loss due to direct interfacing. Thus, the proposed extraoral differential antenna can establish an effective communication link for data and power transfer in the eTDS technology-based applications.
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用于eTDS应用的灵活可佩戴双频差分口外天线
在医疗康复中,可穿戴辅助设备对于监测和推断残疾人的舌头手势至关重要。在本文中,提出了一种在工业、科学和医学(ISM)波段具有双谐振(915MHz和2.4GHz)的柔性可穿戴差分口外天线,用于口外舌驱动系统(eTDS)应用。所制造的口外差分天线原型的尺寸为(0.135${\bm{\lambda}}_{\bm{g}}\,\times\,$0.065${。使用逼真的人头模型分析了差分口外天线的性能。此外,制作了口腔外天线,并在人工头部模型附近对其性能进行了实验验证。在0.915 GHz时,测得的阻抗带宽(≤−10 dB)和峰值增益值分别为90 MHz和$-$20.00 dBi;以及180 MHz和$-\!$2.4GHz时分别为12.87dBi。还通过模拟分析了1g和10g质量组织上的共振频率的比吸收率(SAR)参数值。此外,链路预算在理论上是基于这些可接受的SAR值计算的。所提出的天线可以通过消除巴伦由于直接接口而产生的额外阻抗失配损失来有效地通信。因此,所提出的口外差分天线可以在基于eTDS技术的应用中为数据和功率传输建立有效的通信链路。
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来源期刊
CiteScore
5.80
自引率
9.40%
发文量
58
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Front Cover Table of Contents IEEE Journal of Electromagnetics, RF, and Microwaves in Medicine and Biology About this Journal IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology Publication Information Models of Melanoma Growth for Assessment of Microwave-Based Diagnostic Tools
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