Wednesday, October 17
EE Seminar: Dr. James C. Rautio
Invited Speaker:
Dr. James C. Rautio, Sonnet Software
Place: Swearingen Center, Rm 3D05
Time: 2:00PM
Topic: Substrate Dielectric Anisotropy
This presentation describes an easy, broadband, and accurate means of measuring the uniaxial dielectric constants of a microwave substrate. In this case we provide detailed results for Rogers RO3010 and other substrates.
In this presentation, we first go over some terminology, then illustrate the effect of anisotropy. To introduce the more advance anisotropic technique, we review the common technique of measuring isotropic dielectric constants with a resonator. The RA resonator (named after the initials of the authors) is then introduced for measurement of anisotropy. We show how we extract the even and odd modes from a 2-port measurement of the resonator and then precisely evaluate the resonant frequencies. Once we have the resonant frequencies, we show how to determine the precise dielectric constants based on EM analysis of two similar, but different, cases. This has been done for RA resonators built on FR4, Rogers RO3010, and Rogers RO4350B. Of course no measurement is complete without a detailed error analysis. The results for the error analysis are summarized. Time permitting, a Sonnet/Rogers model of roughness is also discussed.
Biography:
James C. Rautio (S'77-M'78-SM'91-F'00) received the B.S.E.E. degree from Cornell University, Ithaca, NY, in 1978, the M.S. degree in systems engineering from the University of Pennsylvania, Philadelphia, in 1982, and the Ph.D. degree in electrical engineering from Syracuse University, Syracuse, NY, in 1986.
From 1978 to 1986, he was with General Electric, initially with the Valley Forge Space Division, then with the Syracuse Electronics Laboratory. During 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 with Syracuse University and Cornell University. In 1988, he joined Sonnet Software, Liverpool, NY, full time, a company he had founded in 1983. In 1995, Sonnet Software was listed on the Inc. 500 list of the fastest growing privately held U.S. companies, the first microwave software company ever to be so listed. Today, Sonnet Software is the leading vendor of high accuracy three-dimensional planar high-frequency electromagnetic analysis software.
Dr. Rautio was the recipient of the 2001 IEEE Microwave Theory and Techniques Society (IEEE MTT-S) Microwave Application Award. He was appointed MTT Distinguished Microwave Lecturer for 2005 - 2007 lecturing on the life of James Clerk Maxwell.
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