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用于基于微波的头部成像应用的开槽单极贴片天线。

Slotted Monopole Patch Antenna for Microwave-Based Head Imaging Applications.

机构信息

Department of Medical Equipment Technology, College of Applied, Medical Science, Majmaah University, Majmaah City 11952, Saudi Arabia.

Department of Biomedical Technology, College of Applied Medical Sciences in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia.

出版信息

Sensors (Basel). 2022 Sep 23;22(19):7235. doi: 10.3390/s22197235.

DOI:10.3390/s22197235
PMID:36236334
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9573509/
Abstract

A modified monopole patch antenna for microwave-based hemorrhagic or ischemic stroke recognition is presented in this article. The designed antenna is fabricated on a cost-effective FR-4 lossy material with a 0.02 loss tangent and 4.4 dielectric constant. Its overall dimensions are 0.32 λ × 0.28 λ × 0.007 λ, where λ is the lower bandwidth 1.3 GHz frequency wavelength. An inset feeding approach is utilized to feed the antenna to reduce the input impedance (z = voltage/current). A total bandwidth (below -10 dB) of 2.4 GHz (1.3-3.7 GHz) is achieved with an effective peak gain of over 6 dBi and an efficiency of over 90%. A time-domain analysis confirms that the antenna produces minimal signal distortion. Simulated and experimental findings share a lot of similarities. Brain tissue is penetrated by the antenna to a satisfactory degree, while still exhibiting a safe specific absorption rate (SAR). The maximum SAR value measured for the head model is constrained to be equal to or below 0.1409 W/kg over the entire usable frequency band. Evaluation of theoretical and experimental evidence indicates the intended antenna is appropriate for Microwave Imaging (MWI) applications.

摘要

本文提出了一种用于基于微波的出血性或缺血性中风识别的改进型单极贴片天线。该设计的天线是在具有 0.02 损耗角正切和 4.4 介电常数的经济型 FR-4 损耗材料上制造的。其整体尺寸为 0.32 λ × 0.28 λ × 0.007 λ，其中 λ 为较低带宽 1.3 GHz 频率波长。采用嵌入式馈电方法为天线馈电，以降低输入阻抗（z = 电压/电流）。天线实现了总带宽（低于-10 dB）为 2.4 GHz（1.3-3.7 GHz），有效峰值增益超过 6 dBi，效率超过 90%。时域分析证实，该天线产生的信号失真最小。模拟和实验结果非常相似。天线对脑组织的穿透程度令人满意，同时仍表现出安全的比吸收率（SAR）。在整个可用频段内，对头模型进行测量的最大 SAR 值被限制在等于或低于 0.1409 W/kg。理论和实验证据的评估表明，预期的天线适用于微波成像（MWI）应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/1552402765fb/sensors-22-07235-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/8ab9c0f90ead/sensors-22-07235-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/c0126de6bf1d/sensors-22-07235-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/cd5ef130f8ba/sensors-22-07235-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/c76c0d0c2b72/sensors-22-07235-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/35c3de378949/sensors-22-07235-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/bc2bbbc969de/sensors-22-07235-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/cc881b4ded5a/sensors-22-07235-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/373956937ac1/sensors-22-07235-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/c8914fb32e54/sensors-22-07235-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/b5eac2ab971e/sensors-22-07235-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/f0e70f7a99d8/sensors-22-07235-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/bbaa7744212b/sensors-22-07235-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/e4862e8ad85c/sensors-22-07235-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/1552402765fb/sensors-22-07235-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/8ab9c0f90ead/sensors-22-07235-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/c0126de6bf1d/sensors-22-07235-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/cd5ef130f8ba/sensors-22-07235-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/c76c0d0c2b72/sensors-22-07235-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/35c3de378949/sensors-22-07235-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/bc2bbbc969de/sensors-22-07235-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/cc881b4ded5a/sensors-22-07235-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/373956937ac1/sensors-22-07235-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/c8914fb32e54/sensors-22-07235-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/b5eac2ab971e/sensors-22-07235-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/f0e70f7a99d8/sensors-22-07235-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/bbaa7744212b/sensors-22-07235-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/e4862e8ad85c/sensors-22-07235-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/243f/9573509/1552402765fb/sensors-22-07235-g014.jpg

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