Plane wave converter for 5G massive MIMO basestation measurements

Corbett Rowell, Adam Tankielun

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Basestation antenna systems in 5G present two significant challenges for antenna measurement: up to 256 antennas and integrated transceiver with antenna, resulting in an elimination of traditional RF port interfaces and large DUTs (device under test). Several transceiver performance metrics are typically measured in far-field type conditions, including Error Vector Magnitude (EVM), Adjacent Channel Leakage Power (ACLR), and Spectral Emissions Mask (SEM). Due to the basestation size in the 5G sub 6GHz frequency bands, this requires a far-field chamber with 10 to 50 meters of range length. This paper proposes a method using a variant of a hardware based Fourier transform located in the near-field of the DUT antenna in order to create far-field conditions-a plane wave converter (PWC). A phased antenna array of 156 elements is placed within 1.5 meters of a high gain basestation antenna of dimensions 60x60 cm. There is excellent agreement between the gain measurement results of the PWC with measurement results from a certified chamber. The measurement system is bidirectional and able to directly measure both traditional antenna metrics of gain as well as transceiver metrics of EVM, ACLR, SEM, and receiver sensitivity.

Original languageEnglish
Title of host publicationIET Conference Publications
PublisherInstitution of Engineering and Technology
EditionCP741
ISBN (Electronic)9781785618161, 9781785618437, 9781785618468, 9781785618871, 9781785619427, 9781785619694, 9781839530036
ISBN (Print)9781785617911
DOIs
Publication statusPublished - Jan 1 2018
Event12th European Conference on Antennas and Propagation, EuCAP 2018 - London, United Kingdom
Duration: Apr 9 2018Apr 13 2018

Publication series

NameIET Conference Publications
NumberCP741
Volume2018

Other

Other12th European Conference on Antennas and Propagation, EuCAP 2018
CountryUnited Kingdom
CityLondon
Period4/9/184/13/18

Keywords

  • 5G
  • Antenna
  • Measurement
  • OTA
  • Plane wave
  • Propagation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Rowell, C., & Tankielun, A. (2018). Plane wave converter for 5G massive MIMO basestation measurements. In IET Conference Publications (CP741 ed.). (IET Conference Publications; Vol. 2018, No. CP741). Institution of Engineering and Technology. https://doi.org/10.1049/cp.2018.1046