A Parabolic Torus Compact Antenna Test Range for 5G NR Massive MIMO OTA Multi-User Test Applications

This paper presents a novel design for a compact antenna test range (CATR) that uses a parabolic toroid as the main reflector which possesses superior pseudo-plane wave scanning capabilities than existing comparable CATR designs. The wide-angle scanning capability is a crucial feature for successful over-the-air test and measurement of mm-wave 5G NR Massive Multiple Input Multiple Output (MIMO) antenna systems in multi-user applications where existing far-field multi-probe anechoic chamber (FF-MPAC) systems become unattractive due to their large far-field distance requirements. CATR quiet-zone results are presented and discussed.