"‘From ‘DC to Daylight’: Reunifying the Electro-magnetic Spectrum in Silicon and the Opportunities it Opens up"

Kaushik Sengupta, California Institue of Technology

February 27th (Monday), 11:00am
Harold Frank Hall, Room 4164 (ECE Conference Room)

After Maxwell reunified the Electro-magnetic spectrum in the 1850s, the spectrum broke on frequency lines into separate, specialized and mature disciplines of study. Almost a century and half later, we see a reunification of electromagnetism in one single platform, opening up opportunities to create cutting-edge technology for the next-generation systems. Having the ability to synthesize, control and manipulate such a large portion of the spectrum (DC-THz) with a billion transistors in a single platform, silicon, opens up a plethora of opportunities spanning a wide range of applications in sensing, imaging, spectroscopy, medical diagnostics, communication and beyond. Such unprecedented levels of integration can be leveraged only we remove the artificial partitions among various levels of abstraction in system design such as analog, digital, electromagnetics, antenna, communication and control theory and take a holistic approach.

In this talk, I will show some practical examples how such an approach enables us to go beyond transistor speed limits into the terahertz frequency range (0.3-3 THz). I will introduce the concept of Distributed Active Radiation (DAR) combining electromagnetics, circuits, radiation, nonlinear dynamics which synthesizes and controls near-fields to realize the first CMOS THz chip with digitally controlled beam-steering and the first all-silicon active terahertz imaging system fully integrated in commercial silicon technology(~0.3 THz). The intersection of analog, digital and RF creates new opportunities for novel and robust system design and at the end of the presentation, we will discuss a fully integrated, closed loop and autonomous self-healing mm-wave power amplifier capable mitigating process variations, load mismatches and unintentional failures.

About Kaushik Sengupta:

Kaushik Sengupta received the B.Tech.and M.Tech. degrees in electronics and electrical communication engineering, from the Indian Institute of Technology, Kharagpur, India, in 2007. He is working toward the Ph.D. degree at California Institute of Technology, Pasadena. During his undergraduate studies, he was invited for summer research at USC and MIT. His research interests are in the areas of THz sensing and imaging, electromagnetics, novel EM and circuit designs for communication and emerging applications.

Mr. Sengupta was awarded the IBM PhD fellowship for 2011-12, the IEEE Solid-state Circuits Society Predoctoral Achievement Award in 2012, IEEE Microwave Theory and Techniques Graduate fellowship and Analog Devices Outstanding student designer award in 2011. He is also the recipient of the Prime Minister Gold Medal Award in 2007 from IIT, and the IEEE Microwave Theory and Techniques Undergraduate Fellowship in 2006. He also received the Caltech Institute Fellowship and most Innovative Student Project Award in 2007, from the Indian National Academy of Engineering.

Hosted by: Professor John Bowers