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Electrical and Computer Engineering Faculty Research & Creative Works
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Full-Text Articles in Engineering
Spice-Compatible Cavity And Transmission Line Model For Power Bus With Narrow Slots, Gang Feng, Yaojiang Zhang, James L. Drewniak, Lin Zhang
Spice-Compatible Cavity And Transmission Line Model For Power Bus With Narrow Slots, Gang Feng, Yaojiang Zhang, James L. Drewniak, Lin Zhang
Electrical and Computer Engineering Faculty Research & Creative Works
Segmental lumped circuits are derived from coupled transmission line model for a narrow slot on the power bus. Both electric and magnetic coupling are taken into account by distributed inductances and capacitances. Then a SPICE- compatible circuit model for the power bus with the narrow slot is proposed. In this model, the segmental lumped circuits are connected to the equivalent circuit, which is derived by a hybrid cavity model and segmentation method for irregular power/ground planes. The model is validated by comparing with the calculations of finite element method (FEM) for the self or mutual impedances of the two port …
Predictive Modeling Of The Effects Of Skew And Imbalance On Radiated Emi From Cables, J. Chen, James L. Drewniak, Richard E. Dubroff, James L. Knighten, Jun Fan, J. Flavin
Predictive Modeling Of The Effects Of Skew And Imbalance On Radiated Emi From Cables, J. Chen, James L. Drewniak, Richard E. Dubroff, James L. Knighten, Jun Fan, J. Flavin
Electrical and Computer Engineering Faculty Research & Creative Works
This paper provides an approach for predicting the effects of skew and imbalance on radiated emission of cables inside a commercial 19-inch rack-based cabinet. Scattering parameters (S-parameters) for two sets of cable assembly are measured with a four-port vector network analyzer (VNA) and converted into mixed mode S-parameters. Time-domain input signals with different slew rates and different amount of skew are transferred into frequency-domain using fast Fourier transform (FFT). The spectra of radiation emission associated with different inputs are then estimated.
An Efficient Implementation Of Parallel Fdtd, Xiaohe Chen, Michael A. Cracraft, Yaojiang Zhang, Jianmin Zhang, James L. Drewniak, Bruce Archambeault, Samuel R. Connor
An Efficient Implementation Of Parallel Fdtd, Xiaohe Chen, Michael A. Cracraft, Yaojiang Zhang, Jianmin Zhang, James L. Drewniak, Bruce Archambeault, Samuel R. Connor
Electrical and Computer Engineering Faculty Research & Creative Works
A parallel FDTD algorithm has been realized based on 1-D domain decomposition. Data communication among different adjacent processors is manipulated by a self-defined C++ class ( MPI_FDTD) in which portable functions of the message passing interface (MPI) library are used. The details of the implementation are discussed. EMC applications of the code such as cross talk of traces, cavity, vias, as well as an IC package are provided to demonstrate the parallel efficiency.
Numerical Modeling Of Periodic Composite Media For Electromagnetic Shielding Application, Dagang Wu, Rui Qiang, Ji Chen, Ce Liu, Marina Koledintseva, James L. Drewniak, Bruce Archambeault
Numerical Modeling Of Periodic Composite Media For Electromagnetic Shielding Application, Dagang Wu, Rui Qiang, Ji Chen, Ce Liu, Marina Koledintseva, James L. Drewniak, Bruce Archambeault
Electrical and Computer Engineering Faculty Research & Creative Works
This paper describes a methodology to extract effective electrical properties for periodic composite medium. The extraction algorithm is based on a periodic finite-difference time-domain (FDTD) method. The results are compared with conventional mixing theories and 3D Fourier series expansion methods. Two results show satisfactory agreement. With the extracted effective permittivity and conductivity, one can readily use these parameters to study electrical properties of composite materials with arbitrary micro-geometry and the shielding effects of using composite materials.