Wireless sensor nodes are characterized by limited energy sources. Although the interest in wireless connectivity is ever-increasing and the need for Internet-of-Things (IoT) applications, such as automated remote access, monitoring, and control are well-appreciated, widespread adoption of networked wireless devices is largely constrained by their affordable deployment and maintenance costs and convenience of their long-term usage.
To this end, while energy-efficient protocol design is a key for long-lasting network operation, energy harvesting-aware solutions are becoming widely popular as green and affordable approaches towards sustainable network operation. Since ambient energy harvesting is not reliable or suitable for many field applications, an interesting approach is charging them via wireless energy transfer. In this presentation, we will discuss the limitations of radio frequency (RF) energy transfer, the performance of multihop RF energy transfer, and some of the use cases of RF energy
transfer combined with wireless information transfer. In particular, we will discuss the possible ways of improving RF energy transfer efficiency through passive and active distributed beamforming. The role of polarization along with phase alignment in achieving maximum beamforming gain will be discussed. Throughout the presentation, we will mutually corroborate our experimental findings and analytical intuitions in a few application scenarios.
Dr. Swades De is a Professor in the Department of Electrical Engineering and an Institute Chair Professor at the Indian Institute of Technology Delhi. Before moving to IIT Delhi in 2007, he was a tenure-track Assistant Professor of Electrical and Computer Engineering at the New Jersey Institute of Technology (2004-2007).
He worked as a post-doctoral researcher at ISTI-CNR, Pisa, Italy (2004), and has nearly 5 years of industry experience in India on communication hardware and software development (1993-1997, 1999). He received his Ph.D. in Electrical Engineering from the State University of New York at Buffalo, MTech in Optoelectronics and Optical Communications from the Indian Institute of Technology Delhi, and BTech in Radiophysics and Electronics from the University of Calcutta.
Dr. De’s research interests are broadly in communication networks, with an emphasis on performance modeling and analysis. Current directions include resource optimization, energy harvesting, wireless energy transfer, sustainable and green communications, spectrum sharing, smart grid networks, and IoT communications. To date, he has published over 230 articles in top journals and conferences, a few book chapters, an edited book, 1 US/EU/WO patent, and filed 9 Indian patents and 6 US/EU patents.
Dr. De currently serves as an Area Editor for IEEE Communications Letters and Elsevier Computer Communication, and Editor for IEEE Transactions on Vehicular Technology, IEEE Wireless Communications Letters, and IEEE Wireless Communications Magazine. He is a Fellow of the Indian National Academy of Engineering, National Academy of Sciences, India, Institute of Engineers, India, and Institution of Engineering and Technology, UK. Dr. De is a recipient of the Abdul Kalam Technology Innovation National Fellowship and an IEEE Vehicular Technology Society Distinguished Lecturer