DISTINGUISHED LECTURERS LIVE WEBINAR SERIES 2025 | | |
Transmission Lines for High Speed/High Frequency Integrated Circuits
WEDNESDAY, May 28, 2025 • 12:00 - 1:30PM EDT
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Present day high speed/high frequency circuits fall within the realm of radio frequency integrated circuits. These circuits will generate strong EMI in the process of signal transmission. Furthermore, if these circuits operate in the same EM environment, they are prone to mutual interference. It is therefore important to study EMI effects and suggest effective suppression mechanisms. Transmission line is the backbone of any RF integrated circuit which use some sort of parallel or serial signals that are run at high speeds from a transmitter to a receiver. Proper selection of a transmission line will determine insertion loss, time delay, impedance levels, cross talk, and radiation from discontinuities. Some of the conventional transmission lines used in high-speed layouts are stripline, microstrip line, and embedded microstrip line.
The talk will first present characteristics of these conventional transmission lines and then list their advantages and disadvantages. Next, characteristics of several newer transmission lines for application in high speed/high frequency integrated circuit development will be presented. These transmission lines include inverted microstrip, suspended microstrip, recessed ground microstrip, micromachined microstrip, coplanar waveguide, suspended substrate line, suspended integrated substrate line, MEMS coaxial line, and non-radiative dielectric integrated guide. Characteristics of each of these transmission lines in terms of loss, cross talk, and radiation will then be described. Furthermore, some of the commonly used shielding suppression methods will also be briefly presented. Finally, the talk will conclude by discussing practical RF circuit development of novel components using the newer transmission lines. The components include filters, mixers, and complete transceiver based on electromagnetic compatibility that minimizes mutual interference and ensures stability of signal transmission.
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FEATURED DISTINGUISHED LECTURER:
Prof. Shiban Koul, Emeritus Professor, Indian Institute of Technology Delhi, India
Prof. Koul received his Bachelor of Engineering in electrical engineering in 1977 from REC Srinagar, Master of Technology in microwave engineering in 1979, as well as Doctor of Philosophy in the same field in 1983 from IIT Delhi. He is currently an Emeritus Professor with the IIT Delhi since 2019. From 2012 to 2016, he held the position of Deputy Director (Strategy & Planning) at IIT Delhi. In 2016, he was appointed Professor in charge of establishing IIT Jammu, and from 2018 to 2022, he served as Mentor Deputy Director (Strategy & Planning and International Affairs). Prof. Koul was also the Chairman of Astra Microwave Products Limited, Hyderabad, from 2009 to 2019, and the Dr. R. P. Shenoy Astra Microwave Chair Professor at IIT Delhi from 2014 to 2019. He served for a decade on the Governing Board of Electronics Sector Skills Council India. His research interests include RF MEMS, high frequency wireless communication, microwave engineering, microwave passive and active circuits, device modeling, millimeter and sub-millimeter wave integrated circuit design, body area networks, flexible and wearable electronics, medical applications of sub-terahertz waves, and reconfigurable microwave circuits including miniaturized antennas. He successfully completed 38 significant sponsored research projects, 52 consulting projects, and 61 technology development projects. He has authored 615 research papers, 23 state-of-the-art books, four book Chapters, and two electronic books. He holds 26 patents, six copyrights, and one trademark. He supervised over 30 PhD and 120 MTech theses.
Prof. Koul is the recipient of numerous awards including Indian National Science Academy (INSA) Young Scientist Award (1986); Top Invention Award (1991) of the National Research Development Council for his contributions to the indigenous development of ferrite phase shifter technology; VASVIK Award (1994) for the development of Ka-band components and phase shifters; Ram Lal Wadhwa Gold Medal (1995) from IETE; Academic Excellence Award (1998) from Indian Government for his pioneering contributions to phase control module development for Rajendra Radar; Shri Om Prakash Bhasin Award (2009) in the field of Electronics and Information Technology; VASVIK Award (2012) for the contributions made to the area of Information, Communication Technology; Teaching Excellence Award (2012) from IIT Delhi; an award for contributions made to the growth of smart materials technology (2012) by Institute of Smart Materials and Systems Bangalore; MN Saha Memorial Award (2013) from IETE, IEEE MTT Society (MTT-S) Distinguished Educator Award (2014) and Life Time Achievement Award from IETE (2023). His name has recently been included in the “Year 2021” category of Scopus Elsevier, recognizing him as one of the top 2% of scientists.
Prof. Koul is an IEEE Life Fellow, USA, an INAE Fellow, India, and an IETE Fellow, India. He is the Editor in Chief of the Journal of Research, IETE, India and an Associate Editor for the Cambridge, UK-based International Journal of Microwave and Wireless Technologies. From 2012 to 2014, he served as Distinguished Microwave Lecturer (DML) for IEEE MTT-S. Previously, he served as Speaker Bureau Lecturer for IEEE MTT-S. In addition to serving as an AdCom member of the IEEE MTT-S from 2010 to 2018, he is currently a member of the Society’s Awards, Nominations and Appointments and Education Committees. Prior to this, he served for over a decade as regional coordinator for IEEE Region 10. He is currently a Distinguished Microwave Instructor of IEEE MTT-S.
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