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oai:www.ideals.illinois.edu:2142/11987 2023-07-10 col_2142_8888 col_2142_5131 com_2142_8887 com_2142_234 com_2142_5130

Debye model Jin, Jianming Jin, Jianming Cangellaris, Andreas C. Schutt-Ainé, José E. Feng, Milton Lee, Shih-hao 2009-06-01T16:05:25Z 2009-06-01T16:05:25Z 2009-06-01T16:05:25Z 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. Item deposited via ETD process 2009-06-01. Made available in DSpace on 2009-06-01T16:05:25Z (GMT). No. of bitstreams: 3 license.txt: 4061 bytes, checksum: e3e2ae40a5cdb04540393406e81f0621 (MD5) LEE_SHIH-HAO.pdf: 3968061 bytes, checksum: 8f46f083fe949dcd6caa08eb346cae14 (MD5) 1_LEE_SHIH-HAO.pdf: 3968114 bytes, checksum: 2d9a314762e620a69080a566fd5f8a10 (MD5) http://hdl.handle.net/2142/11987 Copyright 2009 Shih-Hao Lee 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 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 printed circuit board (PCB) via-holes signal integrity electromagnetic coupling interconnects domain decomposition Approximate Modal Interface (AMI) Approximate Modal Interface–Solution Space Projection (AMI–SSP) domain decomposition–model order reduction (DD–MOR) computer-aided design (CAD) Efficient Finite Element Electromagnetic Analysis for High-Frequency/High-Speed Circuits And Multiconductor Transmission Lines 2009-5 Electrical and Computer Engineering Electrical and Computer Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.