Abstract
In this paper, the correlation coefficients and the total scattering cross sections (TSCSs) for different types of metasurfaced stirrers and the traditional metallic stirrer, and the effects on field uniformity when such stirrers are used in reverberation chambers, are analyzed. Three metasurfaced stirrers are considered: A stirrer with two unit cells arranged alternatively (#1), a stirrer with two unit cells arranged in a chessboard-like manner (#2), and a stirrer with two unit cells in random arrangement (#3). From the correlation coefficient and TSCS results obtained in simulations, it follows that metasurfaced stirrer #1 is the best option. Field uniformity analysis of the resulting metasurface reverberation chambers (MRC) equipped with the different stirrers also supports this conclusion.
Highlights
A reverberation chamber (RC) consists of a metal shielded chamber containing stirrers, antennas, a piece of equipment under test, as well as other devices
We study and compare three different types of rotating metasurfaced stirrer on the basis of their influence on RC
We note that metasurfaced stirrer #1 respected the tolerance constraint, in accordance with the results of correlation coefficient and total scattering cross sections (TSCSs)
Summary
A reverberation chamber (RC) consists of a metal shielded chamber containing stirrers, antennas, a piece of equipment under test, as well as other devices. In [13], we analyzed the physical mechanism for increasing the number of modes, lowering the operating frequency, and improving the field uniformity in the reverberation chambers, and concluded that a designed sequential metasurface provided better stirring effect than the random one. After dealing with these studies, it is concluded that the coding metasurface stirrer can improve the uniformity of field distribution in the MRC, and can replace the traditional metallic stirrer. The key performance indicators are the correlation coefficients and total scattering cross section (TSCS)
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