University of Oulu

N. Tervo et al., "Measurement Method for Characterizing Nonlinearity Under Near-Field and Far-Field Interferers in 5G mmW Phased Arrays," 2019 49th European Microwave Conference (EuMC), Paris, France, 2019, pp. 420-423. doi: 10.23919/EuMC.2019.8910825

Measurement method for characterizing nonlinearity under near-field and far-field interferers in 5G mmW phased arrays

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Author: Tervo, Nuutti1; Leinonen, Marko E.1; Jokinen, Markku1;
Organizations: 1Faculty of Information Technology and Electrical Engineering (ITEE), University of Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 3.1 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2019
Publish Date: 2019-12-19


A single antenna output of a phased array receiver has only the directivity of the single element. The array gain is achieved once the parallel branches are summed together. The far-field distance of a large array can be several meters which means that for an indoor scenario the interferer can be located in the radiating near-field. In this paper, we present a measurement method for characterizing the nonlinearity of common and parallel paths of the phased array receiver by controlling the number of active RF branches and common branch attenuation. As a measurement platform, we used a 16-chain, 64-element phased array receiver operating at 28 GHz center frequency. ACPR is used as a figure of merit of linearity of the receiver and it is measured over-the-air over the azimuth sector by using 100 MHz wide 5GNR CP-OFDM waveform.

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ISBN: 978-2-87487-055-2
ISBN Print: 978-1-7281-1798-0
Pages: 420 - 423
DOI: 10.23919/EuMC.2019.8910825
Host publication: 2019 49th European Microwave Conference (EuMC)
Conference: European Microwave Conference
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This research has been supported by the Academy of Finland 6Genesis Flagship (grant no. 318927) and Infotech Oulu Doctoral Programme.
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
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