March 30 - April 3, 2009
at
OKLAHOMA STATE UNIVERSITY
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Host The course
is hosted by the School of Electrical and Computer Engineering of Oklahoma
State University. Technical and equipment support is provided by the Naval
Surface Warfare Center, Dahlgren Division (NSWCDD), Dahlgren, VA. Background Several standards including MIL-STD 461E, RTCA DO 160D, IEC 61000-21, and SAE J551/J113 permit the use of reverberation chambers for EMC certification testing. This course is designed for engineers and technicians (with a fair amount of statistical background) who will be involved in radiated emission or immunity testing of commercial or military systems using reverberation chambers. The course will also be valuable to personnel evaluating the use of reverberation chambers as a complement to or replacement for other types of radiated test facilities. The theory portion covers the statistical nature of reverberation chamber testing, characterization of the EM test conditions, and the tradeoff between uncertainty in test results and test time. In groups, participants will work various problems associated with the operation of reverberation chambers and will perform analyses of experimental data and compare results with theoretical predictions. Participants will also develop a test plan for a reverberation chamber immunity test. Extensive course notes and a reference list are provided. The experimental portion includes demonstrations, test setups and instrumentation, statistical sampling techniques (mechanical tuner operation and frequency sweeps), and chamber characterization and calibration measurements. While the experimental portion includes reverberation chamber demonstrations it consists primarily of a series of hands-on experiments conducted in 4 to 5 person groups. Lab notes provide a guide for the experiments and along with the data files generated provide a permanent record of the experiments. The notes format includes the objective, a description of the experiment, instrumentation, test setup, procedures, and room for specific measurements, analyses, results, and conclusions. The experiments and demonstrations are conducted in the small (2.5 x 4 x 7 feet) OSU reverberation chamber. The chamber, constructed in-house by OSU students for less than $1000, indicates the flexibility of the reverberation chamber concept. The chamber can be used for radiative immunity and emission testing above 1 GHz in accordance with several standards. The chamber demonstrates the statistical equivalence of the electromagnetic environment in all conductive cavities independent of size and construction materials.
Participants will have a thorough understanding of the operation of a reverberation chamber for EMC testing. They will have developed a test plan for an immunity test with specified conditions and objectives. They will also have a permanent record of data collected and analyzed, and an extensive set of notes.
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Dates: March 30 - April 3, 2009 Time: 8.00AM to 5.00PM Fee: $2500 if registered before
February 27, 2009 4.0 CEUs/40 PDHs
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Administration
The class will start with administrative items at 0800, 30
March 2009 in (Advanced Technology and Research Center building) on the OSU campus and will end at 1700,
3 April 2009. A local area map and lodging options will be provided with
registration.
Both in-class problems and analyses of experimental data will require a computer
with a spreadsheet application program capable of reading ASCII files. Data for
problems will be provided to each participant on a CD, a USB flash memory, or
3.5" floppy disks. Experimental data collected by each group can be copied from
a CD, a USB flash memory, or 3.5" floppy disk.
Participants should bring a laptop computer and be familiar with a spreadsheet
application program including data manipulation and plotting (EXCEL will be the
spread sheet program used in the presentation). In particular, participants
should be able to perform the following analyses on data sets: maximum, average,
minimum, standard deviation, and correlation coefficient.
Participants should also bring a hand calculator for evaluation of simple
problems during class
Note: The course length is 5days (8.00AM - 5.00PM Monday - Thursday; 8.00AM - 3.00PM Friday). This is an intensive course and after-hours work on exercises is expected. To gain full benefit from the course, please plan to attend the entire course through 3.00PM Friday.
Presenters
1. Dr. Gus Freyer
Gustav Freyer has over 30 years experience in test and evaluation. For over 15 years he was involved in characterization of the electromagnetic environment in reverberation chambers. He participated in many cavity characterization tests as well as equipment and full system tests. He participated in the first full aircraft, Hazards of Electromagnetic Radiation to Ordnance, test in a reverberation chamber. He developed a Data Base of approximately 20 reverberation chambers worldwide. He developed this unique course on reverberation chambers and has presented it numerous times both nationally and internationally. He has authored or co-authored numerous papers and technical reports on topics related to reverberation chambers. Mr. Freyer has a BS Eng., a MS Nuc Eng., and a Ph.D. in Physics.
2. Dr. Charles F. Bunting
Bunting received the A.A.S. degree in electronics technology from the Tidewater Community College, Norfolk, VA, in 1985, the B.S. (honors) degree in engineering technology from the Old Dominion University, Norfolk, in 1989, and the M.S. and Ph.D. degrees in electrical engineering from the Virginia Polytechnic Institute and State University, Blacksburg, in 1992 and 1994, respectively. From 1981 to 1989, he was with the Naval Aviation Depot, Norfolk, first as an apprentice, then an electronics mechanic, and later an electronics measurement equipment mechanic. From 1991 to 1994, he held a Bradley Fellowship and a DuPont Fellowship. From 1994 to 2001, he was an Assistant/Associate Professor at the Old Dominion University, where he worked closely with NASA Langley Research Center on electromagnetic field penetration in aircraft structures and reverberation chamber simulation using finite element techniques. Since 2001, he is an Associate Professor at Oklahoma State University, Stillwater. His research interests include fundamental variational principles and computational electromagnetics, statistical electromagnetics, electromagnetic characterization and application of reverberation chambers, and the analysis of optical and microwave structures using numerical methods including finite element techniques.
3. Vignesh Rajamani
Vignesh Rajamani received the B.E. degree in electronics and communication engineering from the University of Madras, Chennai, India, in 2002, and the M.S. degree in electrical engineering from Oklahoma State University, Stillwater, in 2004. He is currently pursuing the Ph.D. degree at Oklahoma State University. Since 2003, he has been a Research Assistant at the REFTAS Lab, Oklahoma State University. In 2005, he was also a Research Associate for the Department of Electrical Engineering and Industrial Engineering. His research focuses on statistical electromagnetics, antenna engineering, RFID, reverberation chamber operations, validation, and optimization techniques. He was also involved in building the chamber at Oklahoma State University and his current research focuses on characterizing reverberation chamber for different tuner speeds.
Additional Courses Offered
by OSU
Introduction to Reverberation Chambers
This one day course covers the statistical nature of testing in
reverberation chambers, the uniformity and isotropy characteristics of the
electromagnetic environment in a reverberation chamber, directivity and
polarization effects, chamber design issues, and correlatibility with other
radiative tests.
Theory of Radiative Testing Using Reverberation Chambers
This three day course covers the statistical nature of reverberation chamber
testing, typical test setups, and the characteristics of the test
electromagnetic environment. Data from several operational chambers provide
the basis for analyses of chamber performance. Participants work several
problems including development of a test plan for a reverberation chamber
immunity test.
Overview of Radiative Test Facilities
This one day course covers the physical characteristics, the test
electromagnetic environment, and the advantages and disadvantages of the
following radiative test facilities: Open Area Test Site (OATS), Partially and
Fully Absorber Lined Chambers, "Screen Rooms", Reverberation Chambers,
Transverse Electromagnetic (TEM) Cells, Gigahertz Transverse Electromagnetic (GTEM)
Cells, and several less common techniques.
If you have interest in any of the above courses or desire further information including scheduled presentations, email your request to reverb@okstate.edu URL: http://cbunting.ecen.ceat.okstate.edu
