##
Electromagnetic Field Calculation for a High-Frequency
Wave in a Lossy Transmission Line.

The Postscript thesis
text is available, as well as the accompanying EMCROSS
software package.

The objective of this research is to calculate electromagnetic field
distribution on the cross section of a lossy transmission line in a
Multi-Chip Module(MCM) for predicting the performance of a
high-frequency wave propagation in the module. Our approach is to use
the hybrid edge/nodal Vector Finite Element Method (VFEM) and apply
the 3-component Measured Equation of Invariance (MEI) boundary
condition to the calculation. By using the hybrid edge/nodal VFEM
the relation between propagation constant and the field distribution
on the cross section of the transmission line is obtained, and by
using 3-component MEI boundary the field distribution of an open
transmission line is calculated with the limited computer resources.
The propagation constant of a lossy transmission line with coated
conductor strip is also calculated. This 3-component MEI boundary
condition simulates the field propagation on the artificial boundary
for the electromagnetic field excited from the surface charge, from
the current distribution in the axial direction, and from the current
distribution on the transverse plane of the transmission line.
Numerical experiments are performed to test the numerical calculation
with 3-component MEI boundary condition by comparing calculated
transmission loss with the measured data. At high frequency, the
calculated results are about 10% lower than the measured data.
That's because the ground loss is not included in the calculation.

LO, HUNGYING
(Under the direction of Frank Kauffman)