Measurement and Estimation Methodology for EMC and OTA Testing in the VIRC

Abstract

In recent years, promising results have been reported with the vibrating intrinsic reverberation chamber (VIRC) combining performance and cost-efficiency for electromagnetic compatibility (EMC) measurements. This also makes it a potentially attractive solution for over-the-air (OTA) testing, which is yet to be investigated. Therefore, this article proposes the first systematic and thorough methodology to characterize the VIRC for use in EMC and OTA testing of wireless baseband algorithms of narrowband single-input single-output channels. This methodology has been developed to measure and estimate the channel first-and second-order temporal and spectral characteristics taking into consideration the effect of different carrier frequencies, rotational speeds of VIRC motors, and loading conditions. It is then applied to a channel setup inside a VIRC for a preliminary investigation before the VIRC itself is fully characterized. It is shown that mounting an absorber in a specific location on the hatch significantly improves the rejection rate of the chi-squared goodness-of-fit test for Rician distribution without increasing the K-factor above −10 dB over the frequency range 755-2740 MHz in the VIRC under investigation. However, the proposed methodology has been devised to be universal to any reverberation chamber, and the obtained results can be used to improve EMC testing due to the better understanding of the unique VIRC environment.

Empirical Characterization and Modeling of the Propagation Channel Inside the VIRC

“…However, these characteristics are either individually investigated using different VIRC frameworks or not estimated following a VIRC systematic methodology. In [22], a measurement and estimation methodology was recently proposed to characterize the propagation channel inside the VIRC regarding the firstand second-order temporal and spectral characteristics. The literature from [15]- [22] contributes valuable complementing frameworks for analyzing the VIRC.…”

“…In [22], a measurement and estimation methodology was recently proposed to characterize the propagation channel inside the VIRC regarding the firstand second-order temporal and spectral characteristics. The literature from [15]- [22] contributes valuable complementing frameworks for analyzing the VIRC. However, these works lack a practical guide for generating a propagation channel with predefined characteristics or establishing hands-on relationships between channel parameters and VIRC variables.…”

“…This article, building upon the foundation laid out in [23], addresses these gaps by applying the methodology derived from [22] to a specialized channel behavior. Our proposed practical recipe establishes empirically derived relationships connecting channel characteristics with VIRC variables.…”

Experimental Investigation of the Metasurfaced Reverberation Chamber

“…Uniform electromagnetic fields ensure consistent exposure across the test volume, which is essential for valid testing of devices and materials. Expanding the test volume without affecting field uniformity allows for accommodating larger or multiple test subjects, thus increasing chamber versatility [9].…”

A Practical Approach to Generating First-Order Rician Channel Statistics in a RC plus CATR Chamber at mmWave

“…The characterization of the K−factor in RCs has been extensively studied in the literature [13]- [16], since a K−factor as low as possible is required for accurate emulation of RIMP. This leads to lower uncertainty in classic RC RIMP measurements such as Total Radiated Power (TRP) [17], [18].…”