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首页> 外文期刊>Applied Computational Electromagnetics Society journal >Input Resistance Changes and Related Performances of a Normal-Mode Helical Antenna in a Human Body Application
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Input Resistance Changes and Related Performances of a Normal-Mode Helical Antenna in a Human Body Application

机译：人体应用中普通模式螺旋天线的输入电阻变化及相关性能

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摘要

Recently, ingestible capsule endoscopy has been developed to ease the dosimetry process in the stomach and tract. In this application, a helical antenna is used because its shape is suitable for a capsule. The electric performance of a coil antenna can be analyzed by the normal-mode helical antenna (NMHA) concept. Previously, the design equations for NMHA have already been developed in free space application. Application of NMHA in the human body is innovative. Antenna design equations and electrical performance should be clarified. Presently, only self-resonant structure equations are clarified.In this paper, fundamental electric performances such as the input resistance, bandwidth and radiation characteristics are clarified through electromagnetic simulations and experiments. As for a human body tissue, the muscle is selected and a muscle phantom is used for measurements. It is made clear, that the input resistance and the bandwidth are increased by the increase of the human body conductivity, while the antenna gains are decreased.
机译：最近，已经开发出可摄取的胶囊内窥镜以减轻胃和管道中的剂量测定过程。在此应用中，使用螺旋形天线是因为其形状适合于胶囊。线圈天线​​的电性能可以通过正常模式螺旋天线（NMHA）概念进行分析。以前，NMHA的设计方程式已经在自由空间应用中开发出来。 NMHA在人体中的应用是创新的。天线设计方程式和电气性能应予以阐明。目前仅阐明了自谐振结构方程。本文通过电磁仿真和实验阐明了基本电性能，如输入电阻，带宽和辐射特性。对于人体组织，选择肌肉并将肌肉体模用于测量。显然，随着人体电导率的增加，输入电阻和带宽也随之增加，而天线增益却下降。

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    Le Quy Don Tech Univ Fac Radioelect Engn Hanoi Vietnam;

    Telecommun Univ Khanhhoa Vietnam;

    Univ Teknol Malaysia Malaysia Japan Int Inst Technol Kuala Lumpur Malaysia;

    Natl Def Acad Dept Elect & Elect Engn Yokosuka Kanagawa Japan;

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  • 正文语种 eng
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  • 关键词

    Human body; NMHA; phantom; RF;

    机译：人体;NMHA;幻影;射频;

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