Location: MP20 ECE Department
Name of the Speaker: Dr. Debdeep Sarkar
Title of the Talk :Research on MIMO Antenna Systems: Design, Correlation Analysis and Channel Manipulation
Date & Time: Tuesday 21 January, 2020
Venue: Room No. MP20 of ECE Department
Abstract: Multiple-input multiple-output (MIMO) antennas have emerged as the crucial enabling technology in the evolution of wireless communication systems, starting from 1G to 5G (and beyond). The present seminar will uncover various critical electromagnetic aspects in the context of practical realization and characterization of MIMO antennas.
In the first part, a specific case of four-element MIMO antenna based on microstrip-fed inverted L-shaped monopoles will be considered and the general procedure adopted by antenna engineers for synthesis of MIMO antennas will be briefly reviewed. In the process, the importance of estimating spatial correlation (both in far-field and near-field) between various elements in such MIMO antennas would be emphasized upon.
A newly developed construct namely the “Cross-correlation Green’s functions (CGF)” will be introduced next, which establishes the connection between infinitesimal dipole model (IDM) of radiating antenna currents with far field antenna correlation. Further, the mechanism of integrating CGFs with the well-known finite-difference time-domain (FDTD) method will be presented, which facilitates envelope correlation coefficient (ECC) computation in MIMO antennas, over wide frequency range and arbitrary propagation environments.
At this juncture, the recently introduced concept of “near-field antenna correlation coefficient” will be discussed, and its evaluation strategy using FDTD method will be presented. Also the use of IDM-CGF technique in estimating the eigen-space of massive MIMO spatial correlation matrix will be described. The last part of the seminar will showcase some examples of wireless channel manipulation using reconfigurable frequency selective surfaces (FSSs), by adopting FDTD technique. Such large ”intelligent” surfaces (“meta-surfaces”) will potentially lead to the development of green communication, within low power levels and less number of active relays.
Biography: Dr. Debdeep Sarkar received the B.E. degree in Electronics and Telecommunication Engineering from Jadavpur University in 2011, the M.Tech. and Ph.D. degrees in Electrical Engineering from Indian Institute of Technology, Kanpur in 2013 and 2018, respectively. He is currently working as a Post-doctoral Research Fellow in Royal Military College of Canada since November 2018, where he also worked as a Visiting Researcher in May-August 2017.
His research interests include multi-band/ultra-wideband (UWB) antenna design, Electromagnetic analysis of MIMO systems (Correlation and Channel Modelling), space-time Near-field analysis, frequency selective surfaces (FSS) and Computational Electromagnetics (eg. FDTD). He has authored /co-authored more than 30 peer-reviewed journal papers and more than 50 international/national conference papers so far.
Dr. Sarkar is the recipient of the Young Scientist Award in the URSI Asia-Pacific Radio Science Conference (AP-RASC), New Delhi, India, March 2019, along with best paper awards and travel grants in several conferences of international repute. Dr. Sarkar has served as the Chair of IEEE AP-S Student Branch Chapter, IIT Kanpur (April 2017-July 2018), and contributed in IEEE MTT-S Student Branch Chapter, IIT Kanpur as Vice-Chair (April 2016-March 2017), Webmaster (April 2015-March 2016) and Treasurer (Sept. 2014-March 2015).
He also serves as a Regular Reviewer in journals such as the IEEE Transactions on Antennas and Propagation (TAP), IEEE Antennas and Wireless Propagation Letters (AWPL), IEEE Antennas and Propagation Magazine (APM), IEEE Access, Electronics Letters, IET Microwaves, Antennas and Propagation. Dr. Sarkar has been selected as Associate Editor in IEEE Access since December 2019.