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用于测量人体组织介电特性的高分辨率探头设计。

High-resolution probe design for measuring the dielectric properties of human tissues.

机构信息

School of Physics and Optoelectronic Engineering, Xidian University, Xi'an, China.

出版信息

Biomed Eng Online. 2021 Aug 28;20(1):86. doi: 10.1186/s12938-021-00924-1.

DOI:10.1186/s12938-021-00924-1
PMID:34454484
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8403451/
Abstract

BACKGROUND

In order to use the microwave to measure the dielectric constant of the human body and improve the measurement resolution, a small near-field probe working at 915 MHz is designed in this paper.

METHOD

Based on the electric small loop antenna model loaded by the spiral resonator (SR), a small near-field probe was designed. The probe model is designed and optimized by the HFSS (high frequency structure simulator) software. The human tissues were tested by the manufactured probe and the relationship between the S11 parameters of the probe and the human tissues was analyzed.

RESULTS AND CONCLUSIONS

A probe with small size was designed and fabricated, with the overall size of 10.0 mm × 12.0 mm × 0.8 mm. The probe has a good performance with a 30.7 dB return loss, a 20 MHz bandwidth at the resonance point, and a distance resolution of 10 mm. Due to the small size and good resolution of the probe, it can be used in the measurement of human tissues.

摘要

背景

为了利用微波测量人体的介电常数并提高测量分辨率，本文设计了一种工作在 915MHz 的小型近场探头。

方法

基于加载螺旋谐振器（SR）的小电小环天线模型，设计了一种小型近场探头。利用 HFSS（高频结构模拟器）软件对探头模型进行了设计和优化。通过制造的探头对人体组织进行了测试，并分析了探头的 S11 参数与人体组织之间的关系。

结果与结论

设计并制作了一种尺寸较小的探头，整体尺寸为 10.0mm×12.0mm×0.8mm。探头的回波损耗为 30.7dB，在谐振点处具有 20MHz 的带宽，距离分辨率为 10mm，性能良好。由于探头尺寸小、分辨率高，可用于人体组织的测量。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/fc5e9528c7bc/12938_2021_924_Fig16_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/26fe75022287/12938_2021_924_Fig15_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/fc5e9528c7bc/12938_2021_924_Fig16_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/516da515b809/12938_2021_924_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/0b1692886c35/12938_2021_924_Fig2_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/13eead648e9d/12938_2021_924_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/c446bb19b882/12938_2021_924_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/805c6a8af9bd/12938_2021_924_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/48940e05c835/12938_2021_924_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/4a9b348cb1f5/12938_2021_924_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/6fd5b2113af6/12938_2021_924_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/4498650c0cb3/12938_2021_924_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/18442ba23dfc/12938_2021_924_Fig12_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/68d01d582908/12938_2021_924_Fig13_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2905/8403451/fc5e9528c7bc/12938_2021_924_Fig16_HTML.jpg

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