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Design of ultra wide-band low-band implant antennas for capsule endoscope application

机译:胶囊内窥镜应用的超宽带低频带植入天线设计

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摘要

This paper investigated two kinds of design of implant antennas in ultra wide-band (UWB) low-band (3.4–4.8 GHz) for capsule endoscopes. First, two kinds of hemispherical antennas, one has a helical structure and the other has a loop structure, were designed. The hemispherical antennas match for the shape of capsule endoscopes. The reflection coefficient S11 and the directivity of the hemispherical antennas in UWB low-band were investigated in detail. Next, a simplified planar design of the hemispherical loop antenna was proposed for being easy to fabricate. The characteristic of the planar loop antenna in UWB low-band was investigated by both numerical simulation and experiment. In addition to the S11, the path loss of the fabricated planar loop antenna was also measured in a fluid phantom simulating a human body tissue, with a planar unbalance dipole antenna as the receiving antenna. The measured path loss was compared with the simulated result, and good agreement was confirmed between them.
机译:本文研究了两种用于胶囊内窥镜的超宽带(UWB)低频带(3.4–4.8 GHz)植入天线的设计。首先,设计了两种半球形天线,一种具有螺旋结构,另一种具有环形结构。半球形天线适合胶囊内窥镜的形状。详细研究了UWB低频段的反射系数S 11 和半球形天线的指向性。接下来,为了易于制造,提出了半球形环形天线的简化平面设计。通过数值模拟和实验研究了超宽带低频带平面环形天线的特性。除了S 11 ,还使用平面不平衡偶极子天线作为接收天线,在模拟人体组织的流体模型中测量了制造的平面环形天线的路径损耗。将测得的路径损耗与模拟结果进行比较,并确认它们之间的一致性。

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