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Current Induced in Si RFIC Substrates by Spiral Inductors and Patterned Ground Shields

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4/2/14 11:00 am to 4/2/14 12:00 pm EDT

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Technical Education Webinar Series

Current Induced in Si RFIC Substrates by Spiral Inductors and Patterned Ground Shields

Presented by:Sonnet Software

April 2, 2014

8am PT/ 11am ET/ 3pm UTC

It is pure common sense. Everyone knows that Si RFIC inductor loss is mostly due to inductive coupling with the substrate. The current inductively coupled into the substrate will flow parallel to and in the opposite direction of the current flowing in the turns of the spiral inductor. In this presentation, we EM analyze and visualize this substrate induced current and find out that…we are totally, absolutely, and completely wrong! It turns out that understanding why common sense is so wrong is important in understanding how patterned ground shields increase the Q of an inductor, and why in some cases, they don’t work. Join us and realize an in depth understanding of exactly what is going on, and to view some amazing visualizations.

Dr. James Rautio
James C. Rautio received a BSEE from Cornell in 1978, a MS Systems Engineering from University of Pennsylvania in 1982, and a Ph. D. in electrical engineering from Syracuse University in 1986. From 1978 to 1986, he worked for General Electric, first at the Valley Forge Space Division, then at the Syracuse Electronics Laboratory. At this time he developed microwave design and measurement software, and designed microwave circuits on Alumina and on GaAs. From 1986 to 1988, he was a visiting professor at Syracuse University and at Cornell. In 1988 he went full time with Sonnet Software, a company he had founded in 1983. In 1995, Sonnet was listed on the Inc. 500 list of the fastest growing privately held US companies, the first microwave software company ever to be so listed. Today, Sonnet is the leading vendor of 3-D planar high frequency electromagnetic analysis software. Dr. Rautio was elected a fellow of the IEEE in 2000 and received the IEEE MTT Microwave Application Award in 2001 and is an adjunct professor at Syracuse University.

Dr. Joy Laskar
Joy Laskar received his B.Sc. in Computer Engineering (with Physics and Math Minors) from Clemson University and the M.Sc. and Ph.D. degrees from the University of Illinois at Urbana-Champaign. Dr. Laskar is currently a partner at Anayas360, an investment and advisory group in Silicon Valley and serving as Director of Business Development for Sonnet Software. From 1992 to 2011, Dr. Laskar held various faculty positions at the University of Hawaii and at Georgia Tech. Dr. Laskar’s technical expertise and research contributions are at the intersection of Radio Frequency Electronics, Analog Electronics and Electromagnetics. Since 1995, Dr. Laskar has co-founded 4 companies, co-authored 5 textbooks, published more than 600 peer-reviewed journal and conference papers, more than 60 patents (issued or pending) and graduated 41 Ph.D. students. He has pioneered the development of integrated high efficiency integrated Power Amplifier (PA) technology in both GaAs and CMOS, aggressive mixed-signal communication architectures and low power millimeter wave gigabit wireless circuits.

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