Gui, Y; Loh, T H; Borrill, J (2025) Near-Field Evaluation of an Radiated-Two-Stage- Based Millimeter-Wave 5G New-Radio Multiple- Input-Multiple-Output Over-the-Air Test System. In: 2025 19th European Conference on Antennas and Propagation (EuCAP), 31 March 2025 - 04 April 2025, Stockholm, Sweden.

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Abstract

The paper presents a preliminary near-field evaluation of a radiated-two-stage (RTS)-based mm-wave 5G new-radio (NR) MIMO OTA test system. The aim is to verify whether the RTS method is applicable in near-field for the frequency range 2 (FR2). In this paper, a software-definedradio-based user equipment emulator has been developed, which contains a fully functioning baseband processing unit compliant to the 5G NR physical layer protocol. At the transmitting end, a base station emulator (BSE) from Anritsu has been incorporated with a channel emulator (CE). A controlling program to coordinate all different functional blocks in the testbed have also been developed. Some key factors which can significantly influence the performance of the RTS such as the ATF have been carefully studied through performing actual measurement campaign in a fully anechoic chamber. Finally, the performance evaluation of the RTS method in the near field is presented through the preliminary measurement results.

Item Type:	Conference or Workshop Item (Paper)
Keywords:	Radiated Two Stage, Over The Air
Subjects:	Electromagnetics > Electromagnetic Materials
Divisions:	Electromagnetic & Electrochemical Technologies
Identification number/DOI:	10.23919/EuCAP63536.10999715
Last Modified:	08 Oct 2025 14:15
URI:	https://eprintspublications.npl.co.uk/id/eprint/10239