TY - JOUR
T1 - Fast and rigorous analysis of EMC/EMI phenomena on electrically large and complex cable-loaded structures
AU - Baǧci, Hakan
AU - Yilmaz, Ali E.
AU - Jin, Jian Ming
AU - Michielssen, Eric
N1 - Funding Information:
Manuscript received August 23, 2006; revised January 13, 2007. This work was supported in part by the Multidisciplinary Research Program of the University Research Initiative under the Programs “Effects of RF pulses on electronic circuits and systems” and “Modeling antenna feeds,” in part by the Computational Science and Engineering Fellowship at the University of Illinois, and in part by the Air Force Research Laboratory, Directed Energy Directorate Small Business Innovation Research under Grant “Time-domain BLT solver for electromagnetic coupling to cables and circuits” arranged by the Program Manager Dr. J. Yakura.
PY - 2007/5
Y1 - 2007/5
N2 - A fast and comprehensive time-domain method for analyzing electromagnetic compatibility (EMC) and electromagnetic interference (EMI) phenomena on complex structures that involve electrically large platforms (e.g., vehicle shells) along with cable-interconnected antennas, shielding enclosures, and printed circuit boards is proposed. To efficiently simulate field interactions with such structures, three different solvers are hybridized: 1) a time-domain integral-equation (TDIE)-based field solver that computes fields on the exterior structure comprising platforms, antennas, enclosures, boards, and cable shields (external fields); 2) a modified nodal-analysis (MNA)-based circuit solver that computes currents and voltages on lumped circuits approximating cable connectors/loads; and 3) a TDIE-based transmission line solver that computes transmission line voltages and currents at cable terminations (guided fields). These three solvers are rigorously interfaced at the cable connectors/loads and along the cable shields; the resulting coupled system of equations is solved simultaneously at each time step. Computation of the external and guided fields, which constitutes the computational bottleneck of this approach, is accelerated using fast Fourier transform-based algorithms. Further acceleration is achieved by parallelizing the computation of external fields. The resulting hybrid solver permits the analysis of electrically large and geometrically intricate structures loaded with coaxial cables. The accuracy, efficiency, and versatility of the proposed solver are demonstrated by analyzing several EMC/EMI problems including interference between a log-periodic monopole array trailing an aircraft's wing and a monopole antenna mounted on its fuselage, coupling into coaxial cables connecting shielded printed circuit boards located inside a cockpit, and coupling into coaxial cables from a cell phone antenna located inside a fuselage.
AB - A fast and comprehensive time-domain method for analyzing electromagnetic compatibility (EMC) and electromagnetic interference (EMI) phenomena on complex structures that involve electrically large platforms (e.g., vehicle shells) along with cable-interconnected antennas, shielding enclosures, and printed circuit boards is proposed. To efficiently simulate field interactions with such structures, three different solvers are hybridized: 1) a time-domain integral-equation (TDIE)-based field solver that computes fields on the exterior structure comprising platforms, antennas, enclosures, boards, and cable shields (external fields); 2) a modified nodal-analysis (MNA)-based circuit solver that computes currents and voltages on lumped circuits approximating cable connectors/loads; and 3) a TDIE-based transmission line solver that computes transmission line voltages and currents at cable terminations (guided fields). These three solvers are rigorously interfaced at the cable connectors/loads and along the cable shields; the resulting coupled system of equations is solved simultaneously at each time step. Computation of the external and guided fields, which constitutes the computational bottleneck of this approach, is accelerated using fast Fourier transform-based algorithms. Further acceleration is achieved by parallelizing the computation of external fields. The resulting hybrid solver permits the analysis of electrically large and geometrically intricate structures loaded with coaxial cables. The accuracy, efficiency, and versatility of the proposed solver are demonstrated by analyzing several EMC/EMI problems including interference between a log-periodic monopole array trailing an aircraft's wing and a monopole antenna mounted on its fuselage, coupling into coaxial cables connecting shielded printed circuit boards located inside a cockpit, and coupling into coaxial cables from a cell phone antenna located inside a fuselage.
KW - Cables
KW - Electromagnetic compatibility (EMC)
KW - Electromagnetic coupling
KW - Electromagnetic interference (EMI)
KW - Fast Fourier transform (FFT)
KW - Fast solvers
KW - Integral equations
KW - Parallel processing
KW - Time-domain analysis
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U2 - 10.1109/TEMC.2007.897159
DO - 10.1109/TEMC.2007.897159
M3 - Article
AN - SCOPUS:34347393894
SN - 0018-9375
VL - 49
SP - 361
EP - 381
JO - IEEE Transactions on Electromagnetic Compatibility
JF - IEEE Transactions on Electromagnetic Compatibility
IS - 2
ER -