PEDRO, H .J. G.; http://lattes.cnpq.br/9620256708244128; PEDRO, Haslan José Gonçalves.
Resumen:
A reverberation chamber is a test environment used to evaluate the electromagnetic
compatibility of electronic equipment. Inside the Reverb chamber there is a volume
called the uniform field zone where the equipment under test is positioned. In this
volume the value of the standard deviation of the electric field can not exceed 3 dB. The
position of the equipment under test may raise the standard deviation of the electric
field within the uniform field zone. In this sense, it is important to verify, equalize and
reduce the values of the electric field component standard. The standard deviation can
be used as a performance metric, but to evaluate the performance of the reverberation
chamber and the stirrers it is necessary to choose a set of metrics that can characterize
different aspects of the electric field without interior of the chamber, allowing to investigate
a convergence of the results. Each performance metric is obtained by measuring
the electric field at one or more vertices of the uniform field zone. In this work, we used
a set of performance metrics more common in the literature as: coefficient of anisotropy,
coefficient of non-homogeneity, standard pattern and quality factor. The results were
obtained in the range of 700 MHz to 3 GHz, allowing to prove that the reduction of
the working area, the introduction of roughness and the use of opening angles in the
blades of the agitator contribute to the increase of the operating range (in 150 MHz) of
the reverberation chamber, reduction and equalization of the standard deviation (from
1.35 GHz to 3 GHz) within the uniform field zone, allowing the equipment under test
to be tested regardless of its position.