{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/80913"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/80913","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Parallel Fft-Accelerated Time-Domain Integral Equation Solvers for Electromagnetic Analysis","abstract":"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.","abstract_html":"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.","abstract_has_math":false,"creators":["Yilmaz, Ali Ender"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Electrical Engineering","degree_department":null,"school":null,"contributors":["Eric Michielssen","Jin, Jianming"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T20:08:48Z","date_published":"2015-09-25T20:08:48Z","updated_at":"2026-07-22T22:26:15Z","subjects":["Computer Science"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI3182431"],"render_values":[{"text":"(MiAaPQ)AAI3182431","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/80913","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Eric Michielssen","Jin, Jianming"]},{"key":"dc:creator","label":"Author","values":["Yilmaz, Ali Ender"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T20:08:48Z","10000-01-01","2005"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Computer Science"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/80913","(MiAaPQ)AAI3182431"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["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). 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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). 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