A Compact Double-Layer On-Body Matched Bowtie Antenna for Medical Diagnosis
A Compact Double-Layer On-Body Matched Bowtie Antenna for Medical Diagnosis
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DOI：
10.1109/tap.2013.2297158
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发表时间：
2014-04-01
影响因子：
5.7
通讯作者：
Zwick, Thomas
中科院分区：
文献类型：
--
作者：
Li, Xuyang;Jalilvand, Malyhe;Zwick, Thomas
提出了一种紧凑型双层鲍蒂天线，并对其进行了优化设计。这种身体上的天线与人体相匹配，允许更多的能量辐射到人体，以获得更强的反射，用于图像处理。通过使用双层Bowtie天线以及折叠结构和底部弯曲的微带线，在相同的工作频率范围内，与50x50 mm(2)的参考天线相比，实现了30x30 mm(2)的小尺寸，尺寸缩小了40%。在天线参数优化后，天线的特性是从0.5 GHz到2 GHz，其中低频可以实现对人体的高穿透，而大的频率范围有助于高带宽和良好的距离分辨率。从阻抗匹配、近场方向图、增益和合成孔径雷达分布等方面给出了仿真和测量结果。该设计具有体积小、工作频率低、前后比高等特点，在中风、乳腺癌的医学诊断和人体积水检测方面具有很大的潜力。
A compact double-layer Bowtie antenna optimized for medical diagnosis is presented in this paper. This on-body antenna is matched to the human body to allow more energy to be radiated into the human body to obtain stronger reflections for image processing. By using a Bowtie antenna with double layers as well as a folded structure and meandered microstrip lines at the bottom of the antenna, a small size of 30 x 30 mm(2) with a size reduction of 40% is achieved, compared to the reference antenna of 50 x 50 mm(2) within the same operational frequency range. After the optimization of the antenna parameters, the antenna is characterized from 0.5 to 2 GHz, where the low frequencies enable a high penetration into human body and the large frequency range contributes to a high bandwidth and hence a fine range resolution. The simulated and measured results are shown with respect to the impedance matching, near-field pattern, gain and SAR distributions. With features such as a very small size, very low operational frequency, high front-to-back ratio, this design shows a high potential for use in medical diagnosis of stroke, breast cancer and water accumulation detection in the human body.