Antennas and Electromagnetics Group seminar
When: Thursday, January 30, 2025, 10:00 AM - 11:00 AM
Where: Bancroft 1.01.1 + Online , Mile End
On the 30th of January, we will have a talk from Dr Mahesh Abegaonkar. The title of his talk is: “Recessed Ground Technique for Millimeter Wave Circuits and Antennas”.
This talk introduces "Recessed Ground," a simple, low-loss, robust, and cost-effective technique designed to enhance the performance of microstrip filters and antennas operating at 60 GHz. By incorporating a recessed ground beneath a standard 50 Ω microstrip line, the technique achieves a higher characteristic impedance, a significantly reduced effective dielectric constant, and lower dielectric losses, as validated through experimental studies on an alumina substrate. The effects on key lumped circuit elements such as series-gaps, open-ends, and steps are also analyzed. The concept is demonstrated with the design and characterization of a fifth-order Chebyshev bandpass filter and a recessed ground microstrip patch antenna, supported by a 2D capacitance model to evaluate dielectric effects. Additionally, a tapered recessed ground approach is explored for impedance transformation, leading to the development of a recessed ground partial reflective surface patch antenna. This technique offers a practical pathway for advancing millimeter-wave filter and antenna designs, with significant implications for next-generation communication systems.
About the Speaker:
Dr. Mahesh P. Abegaonkar (SM IEEE, FIETE) is an Associate Professor at the Centre for Applied Research in Electronics (CARE), IIT Delhi, and Chair of the IEEE AP-S Chapter, Delhi Section. He holds a Ph.D. in Microwave Sensors from the University of Pune (2002) and has served as a PostDoctoral Researcher and Assistant Professor in South Korea. His research focuses on microwave and millimeter-wave technologies, including metamaterials, Intelligent Reflection Surfaces (IRS), millimeter-wave antennas, antennas for: IBFD, CubeSat, MIMO and reconfigurable applications. He has published ~200 papers, co-authored two books on periodic structures and metamaterials for antennas, and holds multiple patents. Dr. Abegaonkar has led 16 research projects as PI, totalling ₹9 Crores, and contributed to four large-scale projects worth ₹20 Crores. He has supervised 12 Ph.D. students and over 90 M.Tech. projects. Recognized for his contributions, he received the INAE Young Engineer Award (2008) and CSIR Senior Research Fellowship (1998). His
students have won several best paper awards at various conferences.
Key contact: Dr SaeJune Park
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