Abstract
This paper presents an optimization of a method to reconstruct the radiated emissions of an equipment under test by the measurement of the electric field samples collected on the walls of a reverberation chamber. This means that only the orthogonal component of the electric field is necessary to obtain the radiative behavior of the device in free space conditions. The use of the equivalence principle allows one to reduce the number of equivalent sources used to reconstruct the radiation of the device. In fact, in the previous version of the method, the sources are placed into the entirety of working volume of the reverberation chamber. In the current version of the method, only the surface surrounding the equipment under test is discretized. The analytical implementation of the method is proposed for a particular stirring action: the multiple monopole source stirring technique. This technique is based on an array of monopoles placed onto the walls of the cavity, and therefore no further hardware is needed for the reconstruction of the radiated emissions. The method is experimentally validated in a real scenario.
Highlights
IntroductionThe first measurement environment was the open-air test site (OATS), which was subsequently substituted by anechoic alternative test sites as anechoic chambers and TEM or GTEM cells
In this direction, [1,2,3,4,5,6,7] introduced a set of equivalent sources to replace the equipment under test (EUT) and to extrapolate the radiation in free space conditions from the measurements performed in these alternative sites
The EUT was placed into the working volume of a rectangular reverberation chamber (RC), with the dimensions a = 800 mm, b = 900 mm, and c working volume of a rectangular RC, with the dimensions a = 800 mm, b = 900 mm, and
Summary
The first measurement environment was the open-air test site (OATS), which was subsequently substituted by anechoic alternative test sites as anechoic chambers and TEM or GTEM cells. For this reason, how to correlate the measurements performed in these sites to OATS conditions has been investigated. How to correlate the measurements performed in these sites to OATS conditions has been investigated In this direction, [1,2,3,4,5,6,7] introduced a set of equivalent sources to replace the equipment under test (EUT) and to extrapolate the radiation in free space conditions from the measurements performed in these alternative sites. The first is based on the variation of the boundary conditions by rotating metallic paddles [8], or by moving [9] or vibrating [10] the RC’s walls
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