Centre of Excellence on Millimeter and Microwave Research
CoE on Millimeter and Microwave Research is glad to announce a Hybrid-Seminar by Prof. Baidyanath Basu, Retd Professor from IIT-Bhu, Varanasi and Distinguished Adjunct Professor of Supreme Knowledge Foundation Group of Institutions, Mankundu, West Bengal titled
"Circuit Analysis vis-a-vis Electromagnetic Field Analysis"
on 03rd October 2023 at 04:00 PM
Venue: HSB 209 Seminar Room, Department of Physics, IIT Madras.
WebLink: https://meet.google.com/grf-nimc-rau
If you want to get information on our future seminars, please register in the following web link: https://forms.gle/1EmpHzDMZxgtr5qL6
ABSTRACT:
If electromagnetic theory is 'science' then circuit theory is 'engineering'. One can appreciate how Ohm's circuital law follows from Ohm's electromagnetic law and Joule's loss of circuit theory from the concept of Poynting vector. Moreover, it is exciting to see that the dispersion relation of a hollow-pipe waveguide, that supports electromagnetic waves of RF phase velocity greater than the speed of light, can be derived not only by the electromagnetic theory but also by the circuit theory. Similarly, the dispersion relation of a helix slow-wave structure, used in a TWT that supports electromagnetic waves of RF phase velocity less than the speed of light, can be derived not only by the electromagnetic theory but also by the circuit theory. It turns out that the electromagnetic theory gives the interaction impedance of the structure measuring the RF electric field available for interaction with, say, electrons in a vacuum electron device, which cannot be provided by the circuit theory. On the other hand, the circuit theory has an advantage over the electromagnetic theory in that it uses a less number of boundary conditions at a time to derive a circuit parameter and that it can provide the characteristic impedance of the structure for the design of RF input and output couplers in an electron device.
Special Issue on "Electromagnetic Metasurfaces and Metamaterials: From Design to Applications" is scheduled to be brought out by the open access journal "Materials" - IF:3.748. Researchers working on Metamaterials and Metasurfaces can submit their manuscript for publication. The manuscripts can be submitted till 20th April 2023 for consideration.
WEBINAR SERIES
Millimeter and Microwave Research Group is pleased announce the Webinar Series on Millimeter and Microwave Research.
First talk in this series was presented by Professor Alonso Corona Chavez, INAOE, Puebla, Mexico on 24th May 2022 at 06:30 PM IST
Title: Novel microwave filter technologies for modern communication systems
Second talk in this series was presented by Dr. Saptarshi Mukherjee, LLNL, Livermore, USA on 15th June 2022 at 07:00 PM IST.
Title: Electromagnetic Diagnostics for In-situ Metal Additive Manufacturing
Third talk in this series would be a recorded lecture by Prof. Zhengbiao Ouyang, Shenzen University, Shenzen, China. The link for listening the lecture would be provided at a later date.
Title: Photonic crystals and their applications
Fourth talk in this series was presented by Professor Arthur McGurn, Western Michigan University, Kalamazoo, MI, USA on 05th August at 05:30 PM IST
Title: Basic Ideas of Anderson Localization in Electronic and Optical Systems
Fifth talk in this series was presented by Dr Romolo Marcelli, Group Leader, Microwave Micro- and Nano-System Technology Group, CNR-IMM, Rome, Italy on 29th September at 02:30 PM IST
Title: Metamaterial Resonators Implemented by RF MEMS for Reconfigurable K-Band Filters
Sixth talk in this series was presented by Professor Dragomir Neshev, Director, ARC Centre of Excellence for Transformative Meta Optical Systems (TMOS), Research School of Physics, The Australian National University, Acton, Australia on 07th October at 09:30 AM IST
Title: Nonlinear and quantum light sources enabled by dielectric metasurfaces
Seventh talk in this series was presented by Professor Ashwin K Iyer, Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Canada on 22th November 2022 at 18:30 Hrs IST.
Title: Combining Metamaterials and Electromagnetic Bandgap Structures to Enable Multifunctional Compact Antennas and Systems
CENTRE FOR MILLIMETER AND MICROWAVE METAMATERIALS
Centre for Millimeter and Microwave Metamaterials, as part of the Advanced Materials cluster under Institute of Eminence,
combines the power of Materials Science, Computational Electrodynamics and Additive Manufacturing to develop Electromagnetic metamaterials based
components such as Beam Manipulators, Absorbers to fabricate Microwave and Millimeter wave devices for Sensing, Energy Harvesting,
Imaging, Non-Destructive Evaluation, EMI Shielding etc.
Microwave and millimeter wave based applications are constrained by:
(a) materials and processing costs,
(b) energy losses during transmission, propagation, and reception
and
(c) bulky components and systems.
Metamaterials and metasurfaces are poised to revolutionize this scenario through their engineered electrical and magnetic
responses leading to cost-effectiveness, enhanced performance, and reduced footprint.
Metamaterials are media that produce intriguing electrical and magnetic responses to electromagnetic waves through structurally
engineered sub-wavelength features.
Advances in additive manufacturing and novel material synthesis have made it possible to produce complex geometrical structures
with prescribed material properties and responses envisaged through computational electromagnetics simulations.
Scope & Research Initiatives
