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Title:Efficient Finite Element Electromagnetic Analysis for High-Frequency/High-Speed Circuits And Multiconductor Transmission Lines
Author(s):Lee, Shih-hao
Director of Research:Jin, Jianming
Doctoral Committee Chair(s):Jin, Jianming
Doctoral Committee Member(s):Cangellaris, Andreas C.; Schutt-Ainé, José E.; Feng, Milton
Department / Program:Electrical and Computer Engineering
Discipline:Electrical and Computer Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):electromagnetics
microwave
finite element method
fem
nodal elements
vector elements
edge elements
higher-order elements
triangular elements
tetrahedral elements
finite element analysis
full-wave analysis
impedance boundary condition
port boundary condition
wave port
lumped port
deembedding
thin-wire approximation
thin wire modeling
internal impedance
lumped elements
lumped circuits
field-circuit simulation
EM-circuit simulation
stamping
reduced-order modeling
model order reduction
MOR
fast frequency sweep
solution space projection
SSP
quasi-static analysis
quasi-TEM analysis
generalized eigenproblem
Lanczos algorithm
modal analysis
eigenanalysis
frequency-dependent media
anisotropic media
Debye model
multiconductor transmission lines
transmission line parameters
frequency-dependent losses
conductor loss
dielectric loss
substrate loss
characteristic impedance
skin effect
proximity effect
parameter extraction
resistance
inductance
capacitance
conductance
per-unit-length
composite conductors
waveguide
filter
coplanar waveguide
CPW
striplines
microstrip lines
high-frequency circuits
RF circuits
high-speed circuits
tree-cotree splitting
low-frequency breakdown
low-frequency instability
preconditioning
bonding wire
printed circuit board
multilayer PCB
via-holes
signal integrity
electromagnetic coupling
interconnects
domain decomposition
approximate modal interface
AMI
AMI–SSP
DD–MOR
CAD
Abstract:This dissertation comprises the following four components. (1) Development of a robust and efficient 3-D finite element electromagnetic field solver with high-order vector elements for high-frequency and high-speed circuit simulations. The solver supports wave port and lumped port excitations as well as the incorporation of lumped networks and circuit models in a distributed finite element model. An adaptive multipoint model order reduction method is developed for fast broadband analysis. (2) Development of a fast and accurate multiconductor transmission line simulator and parameter extractor with improved model order reduction techniques. A methodology is further proposed for a combined quasi-TEM and full-wave transmission line analysis, which possesses their respective advantages and ensures full-wave accuracy from DC to very high frequencies. The transmission line analysis also takes into account the frequency dependence of dielectric materials. (3) Study of the low-frequency instability problem in the 3-D full-wave finite element simulation. The tree-cotree splitting is combined with several other techniques to improve the matrix conditioning and extend full-wave solutions down to very low frequencies for a more robust broadband characterization of high-speed digital circuits. (4) A combined domain decomposition–model order reduction (DD–MOR) method for efficient full-wave analysis of interconnections in multilayer printed circuit boards. The method not only brings a significant enhancement to computational efficiency while maintaining full-wave accuracy, but also provides great flexibility in the finite element mesh generation.
Issue Date:2009-06-01
URI:http://hdl.handle.net/2142/11987
Rights Information:Copyright 2009 Shih-Hao Lee
Date Available in IDEALS:2009-06-01
Date Deposited:May 2009


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