NDLI: Improving the Performances of a Reverberation Chamber: a Real Case

Content Provider	IEEE Xplore Digital Library
Author	Pocai, M. Dotto, I. Festa, D. D'Abreu, G.
Copyright Year	2009
Description	Author affiliation: IBD International Business Development - 25032 Chiari (BS), Italy, d.festa@ibdonline.it (Festa, D.) \|\| CISAM - Centro Interforze Studi per le Applicazioni Militari, 56010 San Piero a Grado (PI), Italy, mariopocai@nettare.it (Pocai, M.) \|\| ETS Lindgren - 78613 Cedar Park, TX, USA, garth.d'abreu@ets-lindgren.com (D'Abreu, G.) \|\| CISAM - Centro Interforze Studi per le Applicazioni Militari, 56010 San Piero a Grado (PI), Italy, ivan.dotto@cisam.it (Dotto, I.)
Abstract	In a previous measurement campaign [1] it was found that the reverberation chamber (RC) of CISAM EMC Department evidenced anomalous values of the Quality factor (Q) - too low to be "right" for a fully aluminum chamber - and moreover, after some use it became absolutely evident that it was too easy to improve - lowering it, of course - the value of the Lowest Usable Frequency (LUF) of this chamber. After some investigations on the chamber materials/components and on the assembly procedures, the authors developed the idea that this strange behavior had to be attributed to the tuners - being the original ones made with somehow absorbing material - and therefore they decided to replace them with new, all metal tuners. In this paper, the results of a calibration campaign on the reverberation chamber after tuner replacement are presented, as well as the results of an emission test on a standard reference source before and after the replacement. The calibration has been done in the frequency range 80 MHz ÷ 3 GHz, and the emission tests have been performed in the range 100 MHz to 1 GHz, which is exactly the frequency range of the reference radiator used to generate a standard spectrum. The comparison between the results obtained, under the same conditions, with the old and with the new tuners is presented, and the goodness of the assumptions demonstrated: with the new tuners the performances of the chamber have been considerably improved.
Starting Page	53
Ending Page	56
File Size	198226
Page Count	4
File Format	PDF
ISBN	9783952328644
DOI	10.1109/EMCZUR.2009.4783388
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-01-12
Publisher Place	Switzerland
Access Restriction	Subscribed
Subject Keyword	Q measurement Tuners Q factor Reverberation chamber Inorganic materials Frequency conversion Electromagnetic compatibility Calibration Frequency measurement Testing
Content Type	Text
Resource Type	Article

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