Report on the Fluor Daniel Technical Education Funding Program
Visual Displays of Simulated Electromagnetic Phenomena
June 14, 2000
Jooyong Kim, Prof. Dean Neikirk, and Prof. Francis X.
Bostick
Department of Electrical and Computer Engineering
The University of Texas at Austin, Austin TX, 78712
A junior level course in basic electromagnetics and transmission lines is
part of the core curriculum for all undergraduates in the Department of
Electrical and Computer Engineering (ECE). At the present time this course is
taught in a standard lecture format. The course has never been a popular one
because an understanding of many of the concepts taught in the course requires
that the students think abstractly in three dimensional spaces, if not in four
when time variations are included. Students who do not have the natural ability
for this type of abstract thinking find electromagnetics to be difficult, and as
a result uninteresting. This is particularly unfortunate since electromagnetics
is a fundamental subject that is the basis for understanding most aspects of
electrical phenomena, from wave propagation to the operation of
electromechanical systems.
Learning the principles of electromagnetics can be significantly enhanced
with the appropriate visual displays. There are a number of organizations, both
academic and commercial, that have developed software for the display of
computer simulations of such phenomena as static electric and magnetic field
distributions, wave phenomena, and the propagation of current and voltage on a
transmission line, etc. These are all topics taught in our core electromagnetics
course.
Since the advent of world-wide web many electromagnetics researchers have
made a wide range of simulations available via the web. During the Spring 2000
semester we have made use of our Fluor Daniel funding to support a graduate
student who has extensively reviewed the available material on the web. Below is
a summary of links to both on and off campus sites where simulations are
available. This information is posted at a UT-Austin wed site
(http://weewave.mer.utexas.edu/DPN_files/courses/E_M_Tline_rsrcs/fluor_daniel_rprt.htm),
that will then be made available to our electromagnetics instructors and
students. In this way each faculty member teaching the course can incorporate
these supplementary materials into his/her lectures as they see fit. As a
follow-up on the success of the project, the instructors will be asked to
evaluate the efficacy of the presentations on student performance.
WEB SITES WITH DESCRIPTION
CALCULATORS
- SIMIAN (Surface Impedance Method for Interconnect Analysis) Two dimensional
frequency dependent series impedance extraction tool for interconnects and
transmission lines using conductors of rectangular or circular cross section.
- - SIMIAN links -
(http://weewave.mer.utexas.edu/MED_files/MED_research/Intrcncts/SIMIAN_stuff/simian_links.html)
- Wheeler Microstrip Analysis and Design Calculator
- Presents some improved formulas and graphs, including not only the
characteristic impedance but also the losses in the microstrip.
- - Wheeler Microstrip Calculator -
(http://weewave.mer.utexas.edu/DPN_files/courses/363M/microstrip/wheeler_strip_for_web.html)
- *Microstip Analysis and Synthesis Calculator
- Present microstrip transmission
line analysis and design. In analysis mode, the physical width and length of the
transmission line are entered and the program calculates the resulting effective
dielectric constant, the characteristic impedance, the electrical length, and
the loss of the line. In synthesis mode, the desired characteristic impedance
and electrical length are entered and the program calculates the required width
and length for the transmission line.
- - Microstrip Analysis/Synthesis Calculator
-
- (http://www.mit.edu/people/mcmahill/software/mstrip/mscalc.htm)
- Transmission
Line Calculator (Microstrip, StripLine, Coplanar Waveguide, Grounded Coplanar
Waveguide, and Slotline)
- Interactive transmission line calculator for the
analysis and synthesis of transmission line structures such as Microstrip,
Stripline, Coplanar Waveguide, Grounded Coplanar Waveguide, and Slotline.
- -
TXline - Transmission Line Calculator -
- (http://www.appwave.com/txline.htm)
- PCB Trace Impedance Calculator
- *
Inductance Calculator
-
* Harmonic Waveform Calculator
- Calculate the number of periods and harmonics in
the time and frequency domain in case of square, triangle, and trapezoidal case.
-
- Calculator of Digital Wave Form Harmonics -
-
(http://www.emclab.umr.edu/wave/index.html)
- * Mixer Spur Chart Calculator
SPECTRAL ANIMATIONS
- *
Transmission Line Simulation
- * Smith
Chart
- This site introduces the Smith Chart and demonstrates how it can be used
to relate a transmission line reflection coefficient to the load impedance.
- -
Smith Chart -
- (http://www.educatorscorner.com/experiments/spectral/SpecAn9.html)
-
* Measurement Uncertainty
- This site demonstrates the uncertainty in the
measurement of a signal in the presence of an interfering signal at the same
frequency but with an unknown phase.
- - Measurement Uncertainty -
- (http://www.educatorscorner.com/experiments/spectral/SpecAn4.html)
- * Generating
Pulses 3D View
- This site represents the many number of harmonics of the pulse
repetition frequency that are necessary to reproduce a low duty-cycle pulse
train. In a sense this program shows that if you want to amplify a very low
duty-cycle pulse train, you need an amplifier with large bandwidth.
- - Generating
Pulses 3D View -
- (http://www.educatorscorner.com/experiments/spectral/SpecAn2_3d.html)
- * Time
Domain vs. Frequency Domain
- The 3D plot of frequency, amplitude, and time shows
the fundamental of a sine wave and up to three harmonics, as they are formed by
rotating vectors. It is another way to view the construction of a complex
waveform.
- - Time Domain vs. Frequency Domain -
-
(http://www.educatorscorner.com/experiments/spectral/SpecAn3.html)
- *
Superheterodyne Spectrum Analyzer
- This site represents the workings of a
superheterodyne spectrum analyzer.
- - Superheterodyne Spectrum Analyzer -
-
(http://www.educatorscorner.com/experiments/spectral/SpecAn7.html)
- * QuickTime
Movies of Electromagnetic Waves
- This site shows many quick time movies of
electromagnetic waves.
- - EM Wave Movies -
-
(http://www.ee.iastate.edu/~hsiu/em_movies.html)
RECOMMENDED SITES
- *
Computational Magnetics Links
- * EM Simulation All Codes
- * EMLIB
Home Page
- This site presents the database of electromagnetic community, EM
educational resources, and EM software and codes.
- - EMLIB Home Page -
-
(http://emlib.jpl.nasa.gov/)
- * Fachebiet HFS - High Frequency Sites, All Over
The World
- This site presents the web pages of research facilities and groups
main interests are concentrated in the area of high frequency electromagnetic
research and technologies including research topics.
- - Fachgebiet HFS - High
Frequency Sites, All Over The World -
- (http://www.hfs.e-technik.tu-muenchen.de/ext/d07/hf-sites.html)