Mao Jingna, Zhang Zhiwei
Annu Int Conf IEEE Eng Med Biol Soc. 2020 Jul;2020:4169-4174. doi: 10.1109/EMBC44109.2020.9176287.
Energy harvesting from the ambient wireless electromagnetic energy has grown recently in the field of self-sustained and autonomous sensor networks. This technique needs to design a dedicated antenna to receive ambient power within the corresponding frequency band, which increases the designing difficulty and complexity of the system in most degrees. Besides, the available power in the low-frequency bands near 100 MHz is a good power source for energy harvesting. But there is less energy harvesting investigation focused on this frequency band due to the requirement of large size antenna. In this paper, we analyze the feasibility of using the human body as a monopole antenna for energy harvesting in the frequency range of 20-120 MHz. A simulation platform based on HFSS software is built to optimize the performance of the human body antenna. Based on the optimum design of human body antenna, actual measurements in a general electromagnetic environment are carried out to measure the received power. The results showed that there are about -51dBm power and -48.67dBm power can be received at a frequency of 57.72 MHz and frequency band of 20 MHz-120 MHz respectively.
近年来，在自供电和自主传感器网络领域，从周围无线电磁能量中收集能量的技术得到了发展。该技术需要设计一个专用天线来在相应频段内接收环境能量，这在很大程度上增加了系统的设计难度和复杂性。此外，100MHz附近低频段的可用能量是能量收集的良好电源。但由于需要大型天线，针对该频段的能量收集研究较少。在本文中，我们分析了将人体用作单极天线在20 - 120MHz频率范围内进行能量收集的可行性。构建了基于HFSS软件的仿真平台来优化人体天线的性能。基于人体天线的优化设计，在一般电磁环境中进行实际测量以测量接收功率。结果表明，在57.72MHz频率和20MHz - 120MHz频段分别可接收约-51dBm和-48.67dBm的功率。
