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High Performance electrically small Huygens Rectennas Enable Wirelessly Powered Internet of Things Sensing Applications:A Review

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Engineering 2022年第4期8卷 42-59页

作者： Wei Lin Richard W.Ziolkowski Global Big Data Technologies Centre School of Electrical and Data EngineeringUniversity of Technology SydneyUltimoNSW 2007Australia

Far-field wireless power transfer(WPT)is a major breakthrough technology that will enable the many anticipated ubiquitous Internet of Things(IoT)applications associated with fifth generation(5G),sixth generation(6G),and beyond wireless ***,which are the combination of rectifying circuits and antennas,are the most critical components in far-field WPT ***,compact application devices require even smaller integrated rectennas that simultaneously have large electromagnetic wave capture capabilities,high alternating current(AC)-to-direct current(DC)(AC-to-DC)conversion efficiencies,and facilitate a multifunctional wireless *** paper reviews various rectenna miniaturization techniques such as meandered planar inverted-F antenna(PIFA)rectennas;miniaturized monopole-and dipole-based rectennas;fractal loop and patch rectennas;dielectric-loaded rectennas;and electrically small near-field resonant parasitic *** performance characteristics are summarized and then compared with our previously developed electrically small Huygens rectennas that are proven to be more suitable for IoT *** have been tailored,for example,to achieve batteryfree IoT sensors as is demonstrated in this ***-free,wirelessly powered devices are smaller and lighter in weight in comparison to battery-powered ***,they are environmentally friendly and,hence,have a significant societal benefit.A series of high-performance electrically small Huygens rectennas are presented including Huygens linearly-polarized(HLP)and circularly-polarized(HCP)rectennas;wirelessly powered IoT sensors based on these designs;and a dual-functional HLP rectenna and antenna ***,two linear uniform HLP rectenna array systems are considered for significantly larger wireless power *** arrays illustrate how they can be integrated advantageously with DC or radio frequency(RF)power-combining schemes for practical IoT applications.

关键词： antenna Array Cardioid pattern electrically small antenna Huygens dipole antenna Internet of Things(IoT) Rectenna Rectifier circuit Wireless power transfer

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Near-field magnetic induction communication device for underground wireless communication networks

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Science China(Information Sciences) 2014年第12期57卷 157-167页

作者： MA Jing ZHANG XiaoTong HUANG QiWei School of Computer and Communication Engineering University of Science and Technology Beijing

Electromagnetic(EM)waves are the most versatile and widely adopted physical layer technology for underground wireless communication networks(UWCNs).However,they are not suitable for underground communication especially when coils are buried in ***-inductive(MI)communication is a promising technique for UWCNs;it is not affected by large propagation delays,multipath propagation,and ***,MI communication has lower transmitting power and smaller antenna size than EM.A near-field low-power communication device with an electrically small antenna for low-frequency UWCNs is proposed in this *** device can be easily buried *** proposed device is analyzed in terms of basic communication metrics,i.e.,magnetic field intensity,bandwidth,path losses,and received *** of these four metrics shows that the experimental data closely match those of the theoretical model,and the maximum communication distance of 28.5 m,can be ***,according to the experimental results of our device,we further propose the modified received power *** show that the device exhibits good performance and can be used as a stand-alone module in directional underground wireless communication.

关键词： magnetic induction low power electrically small antenna underground wireless communication received power model

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