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Development And Evaluation Of A Characteristic Impedance Calculator

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Conference

2009 Annual Conference & Exposition

Location

Austin, Texas

Publication Date

June 14, 2009

Start Date

June 14, 2009

End Date

June 17, 2009

ISSN

2153-5965

Conference Session

Innovations in ECE Education II

Tagged Division

Electrical and Computer

Page Count

11

Page Numbers

14.463.1 - 14.463.11

Permanent URL

https://peer.asee.org/4705

Download Count

150

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Paper Authors

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Amendra Koul Missouri University of Science and Technology

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Amendra Koul received his B.Tech in electronics and communication from Vellore Institute of Technology in Vellore, India in 2006 and is currently pursuing his M.S. in electrical engineering from Missouri University of Science and Technology. He won the second place in the IEEE India Council best student paper contest 2004. From Jan’06 to June’06 he was selected on a scholarship to pursue his undergraduate project in electromagnetic compatibility laboratory in ESIGELEC France. From July 2006 to July 2007, he was working with Tata Consultancy Services Ltd. in Bangalore, India. His current research interests include electromagnetic compatibility, signal integrity, and microwave engineering.

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Keith Hoover Rose-Hulman Institute of Technology

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Keith Hoover received his B.S. degree from Rose-Hulman Institute of Technology in 1971 and the M.S. and Ph.D. degrees at the University of Illinois in 1972 and 1976, respectively, all in electrical engineering.

He is currently a full professor in the Electrical and Computer Engineering Department at Rose-Hulman Institute of Technology in Terre Haute, IN. His teaching and research interests include electromagnetic compatibility, instrumentation, and embedded systems.

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Vysakh Sivarajan Missouri University of Science and Technology

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JianJian Song Rose-Hulman Institute of Technology

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Jianjian Song (M?88) received his B.S. degree in radio engineering from Huazhong University of Science and Technology in Wuhan, China in 1982, and his M.S. and Ph.D. degrees in electrical engineering from the University of Minnesota in 1985 and 1991. Since 1999, he has been an associate professor with Department of Electrical and Computer Engineering of Rose-Hulman Institute of Technology in Terre Haute, Indiana. From 1991 to 1999, he worked for the Institute of High Performance Computing of the National University of Singapore as research scientist and division manager. His teaching and research interests include electromagnetic compatibility, high-speed digital system design, microcontroller-based system design, embedded and real-time systems, electronics design automation, and algorithms and architecture for parallel and cluster computing.

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Edward Wheeler Rose-Hulman Institute of Technology

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Edward Wheeler (⁍9‵S⁍97) received his B.S. degree from Rose-Hulman Institute of Technology in 1982 and the M.S. and Ph.D. degrees at the University of Missouri-Rolla in 1993 and 1995, respectively, all in electrical engineering.

He is currently an Associate Professor in the Electrical and Computer Engineering Department at Rose-Hulman Institute of Technology in Terre Haute, IN. His teaching and research interests include electromagnetic compatibility, signal integrity, microelectromechanical systems, and the electrical and magnetic properties of materials.

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James Drewniak Missouri University of Science and Technology

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James L. Drewniak (S’85-M’90-SM’01-Fellow’07) received B.S., M.S., and Ph.D. degrees in electrical engineering from the University of Illinois at Urbana-Champaign in 1985, 1987, and 1991, respectively. He joined the Electrical Engineering Department at the University of Missouri-Rolla in 1991 where he is one of the principle faculty in the Electromagnetic Compatibility Laboratory. His research and teaching interests include electromagnetic compatibility in high speed digital and mixed signal designs, electronic packaging, and electromagnetic compatibility in power electronic based systems.

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Abstract
NOTE: The first page of text has been automatically extracted and included below in lieu of an abstract

Development and Evaluation of a Characteristic Impedance Calculator Amendra Koul1, Keith Hoover2, Vysakh Sivarajan1, Jianjian Song2, Edward Wheeler2, James Drewniak1 1 Missouri University of Science and Technology 2 Rose-Hulman Institute of Technology

Abstract This paper presents our development and evaluation of a transmission line characteristic impedance calculator that offers visualization and immediate feedback. Several impedance calculators based on closed-form equations are reviewed in terms of their functionality, accuracy and validity. Two example problems from our calculator are then presented to show how our calculator operates. The accuracy of our calculator for characteristic impedance and per-unit- length capacitance and inductance compares well with that of a commercial 2-D field solver for a range of geometries such as microstrip, stripline, embedded microstrip and asymmetric stripline. Our calculator is written in Matlab and its executable program will be made available on the internet.

1 Introduction Simulation tools with visualization and immediate feedback are effective in engaging interest and in helping them to learn. Visualization appeals to a broad range of learning styles and helps students develop solid conceptual understanding vital for engineering design and application 1. Instant feedback permits students to vary model parameters and to see their affect on the system's response immediately 2,3. In short, simulation tools which permit both visualization and immediate feedback provide an engaging space in which the user can experiment and explore freely.

This paper reports on the development and evaluation of a transmission line characteristic impedance calculator with visualization and instant feedback. The calculator will be made freely available on the internet. Several calculators are currently available on the internet, some being free-of-charge and some available for purchase. Many of these calculators have limited functionalities and have little or no performance evaluation and validation data.

Our calculator employs established closed-form equations from the open literature. We have made great effort to verify them against commercial tools as described in this paper. It includes geometries such as microstrip, stripline, embedded microstrip, and asymmetric stripline. It is compared in terms of functionality, accuracy and validity against other free online impedance calculators also based on closed-form equations. In addition, performance evaluation data of our calculator are also presented over a broad solution space against those obtained from a 2-D field solver, Hyperlynx from Mentor Graphics. The results of the evaluation show that our calculator produces results comparable to Hyperlynx for microstrip and stripline.

The calculator will be especially helpful to engineering students as they explore a variety of transmission lines line behavior and develop the intuitive knowledge needed for design,

Koul, A., & Hoover, K., & Sivarajan, V., & Song, J., & Wheeler, E., & Drewniak, J. (2009, June), Development And Evaluation Of A Characteristic Impedance Calculator Paper presented at 2009 Annual Conference & Exposition, Austin, Texas. https://peer.asee.org/4705

ASEE holds the copyright on this document. It may be read by the public free of charge. Authors may archive their work on personal websites or in institutional repositories with the following citation: © 2009 American Society for Engineering Education. Other scholars may excerpt or quote from these materials with the same citation. When excerpting or quoting from Conference Proceedings, authors should, in addition to noting the ASEE copyright, list all the original authors and their institutions and name the host city of the conference. - Last updated April 1, 2015