Masters Theses


Jing Wu


"“Numerical analysis using the finite-difference time-domain (FDTD) algorithm with a piecewise linear recursive convolution (PLRC) procedure for linear isotropic dispersive magnetic materials is presented herein. The frequency dependence of the susceptibility used for this algorithm is represented in Debye, narrowband Lorentzian, and wideband Lorentzian forms, depending on the ratio of the resonance frequency and the resonance line width. Some numerical examples along with measurements are provided.

The FDTD formulation for composite Debye and Lorentzian media are detailed in Section 2. A special algorithm has been developed for magnetic media interfaces. Also, the parameter limitation of Debye and Lorentzian media is presented.

In Section 3, the frequency dependent permittivity and permeability parameter measurements of NiZn ferrite by stripline resonator are introduced. A test fixture with a microstrip line structure with NiZn ferrite substrate has been used for FDTD simulation and measurements. FDTD simulation results are presented along with the corresponding measurements, demonstrating that the agreement between the measurements and the simulations is satisfactory within the required accuracy”"--Abstract, page iii.


Drewniak, James L.

Committee Member(s)

Pommerenke, David
DuBroff, Richard E.
Koledintseva, Marina


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


viii, 56 pages

Note about bibliography

Includes bibliographical references (pages 54-55).


© 2003 Jing Wu, All rights reserved.

Document Type

Thesis - Restricted Access

File Type




Subject Headings

Electromagnetic fields
Time-domain analysis
Finite differences

Thesis Number

T 8441

Print OCLC #


Link to Catalog Record

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