Reducing Non-Through Body Energy Transfer in Microwave Imaging Systems

IF 3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology Pub Date : 2023-03-07 DOI:10.1109/JERM.2023.3247904
Peter Serano;Johnathan W. Adams;Louis Chen;Ara Nazarian;Reinhold Ludwig;Sergey Makaroff
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Abstract

On-body antennas for use in microwave imaging (MI) systems can direct energy around the body instead of through the body, thus degrading the overall signal-to-noise ratio (SNR) of the system. This work introduces and quantifies the usage of modern metal-backed RF absorbing foam in conjunction with on-body antennas to dampen energy flowing around the body, using both simulations and experiments. A head imaging system is demonstrated herein but the principle can be applied to any part of the body including the torso or extremities. A computational model was simulated numerically using Ansys HFSS. A physical prototype in the form of a helmet with embedded antennas was built to compare simulations with measured data. Simulations and measurements demonstrate that usage of such metal-backed RF-absorbing foams can significantly reduce around-body coupling from Transmit (Tx) and Receive (Rx) antennas by approximately 10 dB. Thus, the overall SNR of the MI system can be substantially improved using this low-cost and affordable method.
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减少微波成像系统中的非穿透体能量传递。
用于微波成像(MI)系统的体上天线可以将能量引导到身体周围而不是通过身体,从而降低系统的整体信噪比(SNR)。这项工作通过模拟和实验,介绍并量化了现代金属背衬射频吸收泡沫与体内天线的结合使用,以抑制身体周围的能量流动。本文演示了头部成像系统,但该原理可应用于身体的任何部位,包括躯干或四肢。使用Ansys HFSS对计算模型进行了数值模拟。建立了一个带有嵌入式天线的头盔形式的物理原型,以将模拟与测量数据进行比较。模拟和测量表明,使用这种金属背衬的RF吸收泡沫可以将来自发射(Tx)和接收(Rx)天线的绕体耦合显著减少约10dB。因此,使用这种低成本和可负担的方法,MI系统的总体SNR可以显著提高。
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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 Front Cover
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