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Full-Text Articles in Engineering
Reconstruction Of Dispersive Dielectric Properties For Pcb Substrates Using A Genetic Algorithm, Jianmin Zhang, Marina Koledintseva, James L. Drewniak, David Pommerenke, Richard E. Dubroff, Zhiping Yang, Wheling Cheng, Konstantin Rozanov, Antonio Orlandi, Giulio Antonini
Reconstruction Of Dispersive Dielectric Properties For Pcb Substrates Using A Genetic Algorithm, Jianmin Zhang, Marina Koledintseva, James L. Drewniak, David Pommerenke, Richard E. Dubroff, Zhiping Yang, Wheling Cheng, Konstantin Rozanov, Antonio Orlandi, Giulio Antonini
Electrical and Computer Engineering Faculty Research & Creative Works
An effective method for extracting parameters of a Debye or a Lorentzian dispersive medium over a wideband frequency range using a genetic algorithm (GA) and a transmission-line model is presented. Scattering parameters (S-parameters) of the transmission-line sections, including a parallel plate, microstrip, and stripline, are measured. Wave equations for TEM/quasi-TEM mode with a complex propagation constant and a frequency-dependent wave impedance are used to evaluate the corresponding S-parameters in an analytical model. The discrepancy between the modeled and measured S-parameters is defined as the objective function in the GA. The GA is used for search of the dispersive-medium parameters by …