C4I Team, Defense Agency Technology and Quality, Jinju 52851, Korea.
Department of Electronics and Electrical Engineering, Hongik University, Seoul 04066, Korea.
Sensors (Basel). 2022 Jan 26;22(3):947. doi: 10.3390/s22030947.
The development of a wireless link for biomedical applications requires an accurate estimation of the delivered power to implanted devices. In particular, a variety of mid-range applications in the biomedical area have gained significant attention. An appropriate method for the mid-range wireless link is required to implement a continuous wireless link through human tissue. Even though formulas used in this work are all based on previous works, this paper presents an implementation of the diverse formulas for the mid-range wireless link of an implanted antenna used for a pacemaker system based on the understanding on radiation properties varied with the distances from the antenna. The formulas based on input far-field data are successfully applied to compute the power transmission for the implanted devices, whose range includes radiative near-field and far-field regions. The wireless link for a pacemaker system is evaluated through using a patch antenna immersed with different depths of human tissue. A comparison of the computed and measured results shows an excellent agreement where the validity of the evaluation is demonstrated.
生物医学应用的无线链路的开发需要对植入设备的传输功率进行精确估计。特别是，生物医学领域的各种中程应用引起了人们的极大关注。需要一种适当的中程无线链路方法来通过人体组织实现连续的无线链路。尽管本文中使用的公式都是基于以前的工作，但它提出了一种基于天线辐射特性随距离变化的理解，对植入天线的中程无线链路的各种公式进行了实现。基于输入远场数据的公式成功地应用于计算植入设备的功率传输，其范围包括辐射近场和远场区域。通过使用浸有人体组织不同深度的贴片天线来评估起搏器系统的无线链路。计算结果和测量结果的比较显示出极好的一致性，证明了评估的有效性。
