Publication: A high gain multiband offset MIMO antenna based on a planar log-periodic array for Ku/K-band applications
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2022-03-08
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Scientific Reports
Abstract
An offset quad-element, two-port, high-gain, and multiband multiple-input multiple-output (MIMO)
planar antenna based on a log-periodic dipole array (LPDA) for Ku/K-band wireless communications
is proposed, in this paper. A single element antenna has been designed starting from Carrel’s theory
and then optimized with a 50-Ω microstrip feed-line with two orthogonal branches that results mainly
in a broadside radiation pattern and improves diversity parameters. For experimental confirmation,
the designed structure is printed on an RT-5880 substrate with a thickness of 1.57 mm. The total
substrate dimensions of the MIMO antenna are 55 × 45 mm2.
According to the measured results, the
designed structure is capable of working at 1.3% (12.82–12.98 GHz), 3.1% (13.54–13.96 GHz), 2.3%
(14.81–15.15 GHz), 4.5% (17.7–18.52 GHz), and 4.6% (21.1–22.1 GHz) frequency bands. Additionally,
the proposed MIMO antenna attains a peak gain of 4.2–10.7 dBi with maximum element isolation of
23.5 dB, without the use of any decoupling structure. Furthermore, the analysis of MIMO performance
metrics such as the envelope correlation coefficient (ECC) and mean effective gain (MEG) validates
good characteristics, and field correlation performance over the operating band. The proposed design
is an appropriate option for multiband MIMO applications for various wireless systems in Ku/K-bands.
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Bibliographic citation
Fakharian, M. M., Alibakhshikenari, M., See, C. H., & Abd-Alhameed, R. (2022). A high gain multiband offset MIMO antenna based on a planar log-periodic array for Ku/K-band applications. In Scientific Reports (Vol. 12, Issue 1). Springer Science and Business Media LLC.