Understanding transmission line impedance matching using neural networks and PowerPoint

Thomas L. Hemminger

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations


Impedance matching between transmission lines and antennas is an important and fundamental concept in electromagnetic theory. It is frequently performed with Smith charts or relatively complex formulas, but mathematical methods can yield unanticipated results unless the student has a solid grasp of the underlying theory. Unfortunately, students rarely show interest in graphical techniques and Smith charts can be difficult to use because of optical effects generated by the gridlines. This paper presents an alternative method of teaching single stub impedance matching by permitting students to verify their results from the Smith chart with a neural network. This technology provides instant feedback for most single stub problems, and is re-enforced through web-based PowerPoint demonstrations. The neural network presents the solution, not the procedure, so it is the responsibility of the student to seek help from the instructor or use the PowerPoint tutorial. Student comments have been very positive, and course evaluations have improved.

Original languageEnglish (US)
Title of host publicationProceedings - Frontiers in Education, 35th Annual Conference
Subtitle of host publicationPedagogies and Technologies for the Emerging Global Economy, FIE'05
StatePublished - 2005
EventFrontiers in Education - 35th Annual Conference 2005, FIE' 05 - Indianapolis, IN, United States
Duration: Oct 19 2005Oct 22 2005

Publication series

NameProceedings - Frontiers in Education Conference, FIE
ISSN (Print)1539-4565


OtherFrontiers in Education - 35th Annual Conference 2005, FIE' 05
Country/TerritoryUnited States
CityIndianapolis, IN

All Science Journal Classification (ASJC) codes

  • Software
  • Education
  • Computer Science Applications


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