Prof Debatosh Guha of University of Calcutta

This talk discusses Role of Antenna Science and Engineering: in the light of 75th Anniversary of IEEE Antennas and Propagation Society.

Biography:

Debatosh Guha is a Professor of the Institute of Radio Physics and Electronics, University of Calcutta, India Abdul Kalam Technology Innovation National Fellow of INAE-DST/SERB, Govt. of India, and an Adjunct Professor at the National Institute of Technology Jaipur. He is formerly HAL Chair Professor of the Indian Institute of Technology, Kharagpur, Head of the Institute of Radio Physics and Electronics, and Director of the Centre for Research in Nanoscience and Nanotechnology of the University of Calcutta.

He received the B. Tech. and M. Tech. degrees in Radio Physics and Electronics and Ph. D. in microwave engineering from the University of Calcutta in 1987, 1989, and 1994 respectively. He joined the same university as an assistant professor in 1994. He had undertaken his post-doctoral research at the Canadian defense university- Royal Military College of Canada, Ontario. He has been connected to different Universities and research institutes across the globe as a regular visitor and collaborator.

Email:

Address: Institute of Radio Physics and Electronics , UNIVERSITY OF CALCUTTA 92 A P C Road, Kolkata , India, 700009

Prof Chinmoy Saha of Indian Institute of Space Science and Technology

Microwave wireless power transfer (WPT) and energy harvesting is attracting focused and unpresented research
attention from the applied electromagnetics community across the globe over last few years, thanks to the growing
applications and market demands. Various means of WPT, such as, near-field techniques using resonant coupling or
far-field techniques using recentness are being explored for various applications such as, IoT sensors, defence and
surveillance, automobiles, agricultures etc. Microwave wireless power transfer via the use of resonant coupling is
basically non-radiative electromagnetic transmission with great potential for diversified applications in the charging
of electronic gadgets, electric vehicles, powering implants in the human body. Wireless transfer of power in a fully
enclosed environment has the potential of efficiently charging 3D distributed wireless sensors and other devices in a
contained environment such as rooms and satellites. Since the revival of WPT via inductive resonant coupling,
capacitively loaded coils have been widely used in near field WPT schemes, yielding moderate transfer efficiencies
in the sub-wavelength regime. Quite recently, the resonant coupling between the high Q-Dielectric Resonator (DR)
modes was exploited to demonstrate the feasibility of using DRs as alternatives to capacitively loaded coils. High Q
values of the DRs contribute to high effective coupling in the system. Moreover, introducing an additional resonator
(hereafter, relay or mediator) that interacts with both the source and receiver DRs can stretch the transfer distances.
The interaction between the source, receiver and relay resonators opens an EIT like channel between the source and
receiver through the creation of a non-bonding mode. In the context of Electron Spin Resonance Spectroscopy, it
was shown that the TE 01 of a DR inserted in a cylindrical cavity strongly couples with the cavity TE 011 mode.
Additionally, placing two DRs inside the cavity generates bonding, non-bonding and anti-bonding modes; hence
generating an EIT like channel between the two DRs. This talk will provide a brief insight into the principle of
microwave wireless power transfer (WPT) using high  r dielectric material in SCR (split Cavity Resonator) and
aqueous medium. Recent work, emphasizing coupled mode theory, systematic studies in FEM based simulation and
recent experimental work demonstrating power transfer with efficiency, will be highlighted in the talk. The talk
will also summarize some of the recent research activities of our group on various designs of efficient recentness
and new ideas on the timed array.

Biography:

Chinmoy Saha received his PhD degree from University of Calcutta, India and currently working as a Professor in the Indian Institute of Space Science and Technology, India. He has research collaboration with several International Universities in North America and Europe. He is a senior Member of IEEE & USRI, current chair of MTT-S SIGHT committee and region-10 coordinator MTT-S since 2023. He is the founder and past chair of MTT-S Kerala (2019- 2021) and former chair of AP-S Kerala chapter (2018-2019). Dr. Saha has received several prestigious awards which includes Teaching Award from Government of India, “IETE Prof. SN Mitra Memorial Award”, several IEEE volunteers’ awards, and 12+ best paper awards. His research interest includes WPT and Energy Harvesting, Metamaterial/ metasurface inspired systems, multi-functional antennas for
wireless applications, mm-wave/THz systems and antennas & components for space applications. He has more than 190 publications including in journal/conference and authored three books He is an associate editor in IEEE Microwave Magazine and IEEE Access.

Email:

Address:Department of Avionics , Indian Institute of Space Science and Technology , Thiruvananthapuram, Kerala, India, 695547