Open AccessPlane wave compensation technique for multiple‐input multiple‐output over‐the‐air testing in small multi‐probe anechoic chamber
Author(s) -
Wang Heng,
Wang Weimin,
Gao Huaqiang,
Wu Yongle,
Liu Yuanan,
Gao Jinchun
Publication year - 2019
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2019.0036
Subject(s) - anechoic chamber , compensation (psychology) , acoustics , plane (geometry) , plane wave , physics , optics , mathematics , geometry , psychology , psychoanalysis
Multiple‐input multiple‐output (MIMO) over‐the‐air (OTA) testing is often executed in multi‐probe anechoic chamber (MPAC), the size of which is generally large enough so that the waves radiated from the probes can be considered plane waves in test area. The physical dimension of test setups is a key cost factor. In order to save laboratory space and reduce the cost, a compensation technique for spherical waves synthesising plane waves is proposed, which can be applied in small anechoic chamber. The object is to investigate the performances of the proposed plane wave compensation technique on MIMO terminal OTA testing in small MPAC. In the simulation, this technique presents good performances on various metrics, e.g. field distribution, spatial correlation, power angular spectrum estimation. As demonstrated in simulation, the ring radius of anechoic chamber can be reduced and the conventional far field criteria can be relieved.