Masters Theses


Jianmin Zhang


"This thesis consists of two parts. In Part 1, a method for reconstruction of the parameters of Debye or Lorentzian dispersive media using a genetic algorithm is proposed. In this method, S-parameters of a simple parallel-plate transmission line fixture filled with dispersive medium are measured first. Then, a transmission line model is set up, based on the test fixture in frequency domain for the genetic algorithm, provided a single TEM mode propagates in the parallel-plate waveguide. The genetic algorithm is used for searching the parameters of the dispersive medium by means of minimizing the discrepancy between the measured and modeled S-parameters. The results are verified using a full-wave numerical Finite-Difference Time-Domain (FDTD) method, realized as the EZ-FDTD codes.

In Part 2, the fundamental technique of EZ-FDTD based on Maxwell’s curl equations and Yee’s algorithm is presented. The basic elements, source, media, absorbing boundary conditions and output files are given in detail for building an EZ-FDTD model. A brief introduction to the EZ-FDTD GUI, a graphical user interface, and some special notes for applications are also presented. Finally, three EZ-FDTD modeling examples are presented, and a comparison between the simulations and measurements is given to demonstrate agreement between the two"--Abstract, page iii.


Drewniak, James L.

Committee Member(s)

Pommerenke, David
Koledintseva, Marina
O'Keefe, Matthew


Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering

Research Center/Lab(s)

Electromagnetic Compatibility (EMC) Laboratory


University of Missouri--Rolla

Publication Date

Fall 2003


x, 62 pages

Note about bibliography

Includes bibliographical references (pages 60-61).


© 2003 Jianmin Zhang, All rights reserved.

Document Type

Thesis - Restricted Access

File Type




Thesis Number

T 8383

Print OCLC #


Link to Catalog Record

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