June 14, 2009
June 14, 2009
June 17, 2009
Electrical and Computer
14.1269.1 - 14.1269.24
Three Practical and Effective RF and EMC Experiments for a Computer Engineering Course on Electromagnetics and EMC Keith Hoover1, Jianjian Song1, Edward Wheeler1, James Drewiniak2 1 Rose-Hulman Institute of Technology 2 Missouri University of Science and Technology
This paper presents three practical and effective electronic hardware experiments which demonstrate respectively (1) use of a common-mode choke to perform common-mode current suppression, (2) construction and analysis of an FM wireless microphone and (3) study of bypass capacitor effectiveness to demonstrate concepts related to electromagnetic compatibility (EMC), signal integrity (SI) and radio frequency (RF) design. The experiments have been performed as part of the laboratory portion of our required junior-level course for computer engineering students on electromagnetics and EMC. These experiments have helped students understand the underlying physics in addition to demonstrating measurement techniques and solution options for the topics discussed in the course. They are easy and inexpensive to implement and perform because they can be set up on a standard breadboard. They should prove useful in any engineering course on RF circuits, electromagnetic, SI and EMC. As high speed, low power, wireless, and hand-held embedded engineering designs become more common, computer engineering students have a growing need for knowledge and experience in design and manufacturing issues related to SI and EMC. We have found these experiments to be valuable and effective in enhancing student interest in RF, SI and EMC.
Electromagnetic compatibility (EMC) and signal integrity (SI) have become pervasive design issues in high-speed designs of digital systems, wireless devices, mixed signal systems, and hand-held devices. Two ready examples of industries with acute and long-standing need for engineers with an understanding of EMC design issues are automotive electronic systems and home entertainment systems.
Ensuring signal and power integrity in digital electronic systems is vital to maintaining signal viability as these signals propagate along their path amidst noise from different sources. The topic is critical in electronic system design at various levels including backplanes, printed circuit boards, integrated circuit packages and integrated circuits. Signal and power integrity are inherently multidisciplinary topics that draw upon knowledge and techniques from circuit design, electromagnetic field theory, material properties, and packaging design.
As signal speeds increase, lumped element models become inadequate to describe circuit behavior, and coupling and crosstalk between adjacent conductors become significant problems. The models used to describe electronic signals and devices must consider these electromagnetic effects at high speeds when the sizes of devices and signal paths are of the same order as wavelength of the signals. Circuit designers will need to understand that signals propagate as waves in order to successfully design high speed circuits and systems.
Hoover, K., & Song, J., & Wheeler, E., & Drewniak, J. (2009, June), Three Practical And Effective Rf And Emc Experiments For A Computer Engineering Course On Electromagnetics And Emc Paper presented at 2009 Annual Conference & Exposition, Austin, Texas. https://peer.asee.org/4706
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