TY - JOUR
T1 - A 28-Port MIMO Cube for Micro Base Station Applications
AU - Zetterstrom, Oskar
AU - Kolitsidas, Christos I.
AU - Jonsson, Bengt Lars Gunnar
AU - Alayón Glazunov, Andrés
N1 - Funding Information:
Manuscript received October 17, 2018; revised August 7, 2019; accepted December 20, 2019. Date of publication January 7, 2020; date of current version May 5, 2020. This work was supported in part by The Swedish Governmental Agency for Information Systems (VINNOVA) within the VINN Excellence Center, ChaseOn through the Research Project Integrated Antenna Arrays. (Corresponding author: Oskar Zetterstrom.) Oskar Zetterstrom and Bengt Lars Gunnar Jonsson are with the Division for Electromagnetic Engineering, KTH Royal Institute of Technology, 114 28 Stockholm, Sweden (e-mail: [email protected]).
Publisher Copyright:
© 1963-2012 IEEE.
PY - 2020/5
Y1 - 2020/5
N2 - A novel multiband, dual-polarized, 28-port multiple-input multiple-output (MIMO) cube is presented. The cube structure enables dense placement of the antennas, whilst still allowing for low correlation between the individual antenna ports. The total size of the cube is roughly 2 × 2 × 0.7 λ 3 0 , where λ 0 is the wavelength at the lowest used frequency. The novelty of the design lies in the use of a combination of orthogonally polarized endfire and broadside radiating antenna elements. Full use of all facets of the cube is achieved without the need to sacrifice bottom or top facets for mounting. Therefore, full azimuthal coverage for communication in two orthogonal polarizations is readily achieved. The system operates in both cellular and Wi-Fi bands (2.4 and 5.5 GHz), with a targeted |S 11 | below -10 dB. The MIMO performance of the system is evaluated in two environments: the rich isotropic multipath environment and the random line-of-sight environment. These two scenarios represent the edge environments of any real-life propagation scenario in terms of the directional distribution of outgoing or incoming waves at an MIMO transceiver. The intended application of the system is micro base stations and repeaters, with possible extension to massive MIMO.
AB - A novel multiband, dual-polarized, 28-port multiple-input multiple-output (MIMO) cube is presented. The cube structure enables dense placement of the antennas, whilst still allowing for low correlation between the individual antenna ports. The total size of the cube is roughly 2 × 2 × 0.7 λ 3 0 , where λ 0 is the wavelength at the lowest used frequency. The novelty of the design lies in the use of a combination of orthogonally polarized endfire and broadside radiating antenna elements. Full use of all facets of the cube is achieved without the need to sacrifice bottom or top facets for mounting. Therefore, full azimuthal coverage for communication in two orthogonal polarizations is readily achieved. The system operates in both cellular and Wi-Fi bands (2.4 and 5.5 GHz), with a targeted |S 11 | below -10 dB. The MIMO performance of the system is evaluated in two environments: the rich isotropic multipath environment and the random line-of-sight environment. These two scenarios represent the edge environments of any real-life propagation scenario in terms of the directional distribution of outgoing or incoming waves at an MIMO transceiver. The intended application of the system is micro base stations and repeaters, with possible extension to massive MIMO.
KW - Cube antenna
KW - Multiple-input multiple-output (MIMO)
KW - Random line-of-sight (LOS)
KW - Rich isotropic multipath (RIMP)
KW - 22/4 OA procedure
UR - http://www.scopus.com/inward/record.url?scp=85077971258&partnerID=8YFLogxK
U2 - 10.1109/TAP.2019.2963231
DO - 10.1109/TAP.2019.2963231
M3 - Article
SN - 0018-926X
VL - 68
SP - 3443
EP - 3452
JO - IEEE transactions on antennas and propagation
JF - IEEE transactions on antennas and propagation
IS - 5
M1 - 8951444
ER -