Circularly Polarized MIMO Antenna Based on Microstrip Patch and Metasurface Structures

This paper shows a two-element multiple-input–multiple-output (MIMO) circularly polarized antenna. The proposed design achieves polarization diversity by using two conventional truncated corner square patches. Since the operating bandwidth of the conventional design is extremely narrow, a metasurfac...

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Bibliographic Details
Published inElectronics (Basel) Vol. 12; no. 2; p. 384
Main Authors Tran, Huy-Hung, Nguyen, Tung The-Lam, Pham, Tuyen Danh
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.01.2023
Subjects
Antenna design
Antennas
Bandwidths
Circular polarization
Configuration management
Metasurfaces
MIMO communication
Musical performances
Radiation
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Summary:This paper shows a two-element multiple-input–multiple-output (MIMO) circularly polarized antenna. The proposed design achieves polarization diversity by using two conventional truncated corner square patches. Since the operating bandwidth of the conventional design is extremely narrow, a metasurface is utilized for bandwidth enhancement. In the open literature, several MS-based MIMO antennas have been reported. However, these designs can achieve high isolation with wide spacing between the MIMO elements. For the proposed design, the configuration of the MS is modified so that high isolation can be obtained with smaller element spacing. The design concept is verified by measurements on a fabricated prototype. The measured operating bandwidth (BW), which is an overlap between −10 dB impedance and 3-dB axial ration BWs, is from 5.0 to 5.6 GHz (11.3%). Across this band, the isolation is always higher than 20 dB and the realized gain is higher than 4.4 dBi.
ISSN:2079-9292
2079-9292
DOI:10.3390/electronics12020384