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oai:www.ideals.illinois.edu:2142/80913 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Eric Michielssen Jin, Jianming Yilmaz, Ali Ender 2015-09-25T20:08:48Z 2015-09-25T20:08:48Z 10000-01-01 2005 2005 This dissertation presents a fast electromagnetic field-circuit simulator that permits the full-wave modeling of transients in microwave systems containing multiscale structures and nonlinear devices. This time-domain simulator is composed of two components: (i) a full-wave solver that models interactions of electromagnetic fields with conducting surfaces and finite dielectric volumes by solving time-domain surface and volume electric field integral equations, respectively, and (ii) a circuit solver that models currents and voltages in lumped circuits, which are potentially active and nonlinear, by solving Kirchoff's equations through modified nodal analysis. The simulator also supports multiport transfer-function blocks (macromodels), which model (lumped or distributed) linear, time-invariant, multi-input multi-output subsystems that are connected to ports modeled by either the full-wave solver or the circuit solver. These field and circuit analysis components are interfaced and the resulting coupled set of nonlinear equations is evolved in time by a multidimensional Newton-Raphson scheme. The solution procedure is accelerated by allocating field- and circuit-related computations across the processors of a distributed-memory cluster, which communicate using the message-passing interface standard. Furthermore, the electromagnetic field solver, whose demand for computational resources far outpaces that of the circuit solver, is accelerated by an FFT-based algorithm, viz. the time-domain adaptive integral method. The resulting parallel FFT-accelerated transient field-circuit simulator is used to (i) analyze electromagnetic scattering from large-scale structures, including an aircraft shell, (ii) characterize microwave circuits with nonlinear devices, including a power-combining array, and (iii) quantify system-level electromagnetic interference for systems with multiple scales of details, including an antenna array on a cockpit. Made available in DSpace on 2015-09-25T20:08:48Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3182431.pdf: 9005740 bytes, checksum: 6491daef707acb003c3db951e4a749db (MD5) Previous issue date: 2005 Embargo set by: Seth Robbins for item 82195 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 134 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2005. http://hdl.handle.net/2142/80913 (MiAaPQ)AAI3182431 eng Computer Science Parallel Fft-Accelerated Time-Domain Integral Equation Solvers for Electromagnetic Analysis text Electrical Engineering Electrical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.