Employing correlation for wireless components and device characterization in reverberation chambers

Abstract

Reverberation chambers are well-proven test environments for radio frequency (RF) measurements. Typically, mean values are taken from the measurements to characterize the equipment under test. In the novel approach presented in this paper, the correlation of measured sample sequences is utilized to detect deviations, in particular of the radiation characteristics, from reference equipment. This approach is exemplified by a measurement setup using several different antennas with the same housing. The complex correlation coefficient and the correlation coefficient with respect to the transferred power of two measured sample sequences are calculated and evaluated for a suitable frequency range to detect differences between the radiation characteristics.

On the Security of IO-Link Wireless Communication in the Safety Domain

“…General surveys of IOLW as an open-vendor communication solution for factory automation on the shop floor are given in [?, 7,8,9,10] with a focus on roaming in [11], antenna planning in [12], coexistence in [13,14,15], security enhancement in [16,17] and functional safety [1], and on IOLW testing in [19,20,21,22,23]. Nevertheless, a short introduction to IOLW is given here.…”

IO-Link Wireless Sensitivity Testing Methods in Reverberation Chambers

“…A key requirement is always high reliability, which makes testing necessary. In the last years, reverberation chambers (RCs) could be established as test environments for electromagnetic compatibility (EMC) testing with a corresponding standard IEC 61000-4-21 [2] or for antenna measurements [3][4][5] or over-the-air (OTA) evaluation of wireless devices with integrated antennas [6][7][8][9]. In [6], the general use of RCs for wireless device tests was proposed and in [7], different methods for sensitivity measurements were suggested.…”