A Fast Procedure for Total Isotropic Sensitivity Measurements of Cellular IoT Devices in Reverberation Chambers

Nogueira, Carnot; Remley, Kate A.; Catteau, Sara; Vance, Scott L.; Kristoffersen, Mats; Skousen, Derek; Horansky, Robert D.

doi:10.1109/tim.2022.3219479

Cited by 3 publications

(1 citation statement)

References 17 publications

(33 reference statements)

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“…The multiple-input and multiple-output (MIMO) techniques have been adopted in communication systems to increase data rates [1], which also brings challenges to the over-theair (OTA) testing of multi-antennas. Several OTA testing solutions have been proposed in [2][3][4][5][6][7] to evaluate the performance of multi-antennas. These testing methods are mainly categorized into two groups, e.g.…”

Section: Introductionmentioning

confidence: 99%

Switchable metasurface absorber used for enabling reconfigurable power angular spectrum in reverberation chamber

Zhang,

Zhao,

Liu

et al. 2024

J. Phys. D: Appl. Phys.

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The reverberation chamber (RC) provides a fast and repeatable method for over-the-air (OTA) testing of wireless devices. Moreover, the RC-based method can reduce the OTA testing cost to a great extent. But the defect of the RC is also obvious. Compared to a multi-probe anechoic chamber, the channel spatial characteristics in RC are uncontrollable. The device under test in a RC usually sees a statistically isotropic channel and there is a strong impediment to control the channel in RC, which constrains the RC’s OTA applications. In this paper, we propose a method to realize reconfigurable RC enabling arbitrary channel power angular spectrum (PAS) by using a switchable metasurface absorber. Specifically, the unit cell of the metasurface can be switched between the reflection and absorption states by providing different bias voltages. By mounting the switchable metasurface absorber on theRC’s inside walls, the boundary conditions of the RC in the covered area could be switched electronically. Consequently, the channel’s PAS can be controlled by changing the local states of the switchable metasurface absorber. As a proof of concept, a prototype of the switchable metasurface absorber is made and comprehensive experiments are conducted to verify the effectiveness of the switchable metasurface applied to enable reconfigurable PAS in RC.

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