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A novel approach to characterization of frequency dependent losses in transmission lines
Akinwale, Oluwafemi Mofeyisayo
Engin, Arif E.
harris, fred j.
xii, 63 p. : ill.
An accurate measurement technique is required to fully characterize the losses observed at high frequencies in transmission lines. Evaluation of losses seen at high frequencies is necessary to meet the high-speed data transfer rates that future applications will demand. Conductor properties and losses are two critical issues in signal path characterization. The nature of conductor losses is not well understood at high speeds. Classical models used for predicting the effects of surface roughness on signal propagation are known to breakdown around 5 GHz. Novel methods are sought to quantify the effects beyond 5 GHz. Direct simulation and measurements of surface roughness effects are difficult, because dielectric loss has similar impact on measured data. In this study, the phenomenon of copper surface roughness will be addressed. A novel methodology to extract conductor based on a stripline configuration of two different widths will be proposed. This new methodology does not suffer from inaccurate assumptions on the dielectric loss tangent as the contribution of the dielectric loss is completely eliminated. Simulation will be performed using ANSYS HFSS and AGILENT ADS. The final outcome of this thesis will be to verify electromagnetic simulations with surface roughness against measurements and to demonstrate the importance of surface roughness
Includes bibliographical references (p. 62-63)
Electrical and Computer Engineering
Master of Science (M.S.) San Diego State University, 2011
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