Mutual coupling reduction using ground stub and EBG in a compact wideband MIMO-Antenna

This paper presents a compact, uni-planer wide band Multiple-Input-Multiple-Output (MIMO) antenna. The designed antenna array has a compact size of (26mm x 31mm) covering a wide frequency band from 3.1GHz - 11GHz. A partial ground plane shared by two radiating patches is used. A ground stub and a si...

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Bibliographic Details
Published inIEEE access Vol. 9; p. 1
Main Authors Khan, Awais, Bashir, Shahid, Ghafoor, Salman, Qureshi, Khurram Karim
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 01.01.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Antenna arrays
Antennas
Channel capacity
Channel Capacity Loss
Columnar structure
Correlation coefficients
Electromagnetic Band gap
Envelope Correlation Coefficient
Far fields
Frequencies
Ground plane
Metamaterials
MIMO communication
Multiple Input Multiple Output (MIMO)
Mutual coupling
Periodic structures
Ultra Wide Band (UWB)
Ultra wideband antennas
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Summary:This paper presents a compact, uni-planer wide band Multiple-Input-Multiple-Output (MIMO) antenna. The designed antenna array has a compact size of (26mm x 31mm) covering a wide frequency band from 3.1GHz - 11GHz. A partial ground plane shared by two radiating patches is used. A ground stub and a single column Electromagnetic Bandgap (EBG) structure in between the two radiating patches results in very low mutual coupling in the designed antenna. The proposed MIMO-antenna was evaluated through different performance metric indicators like channel capacity loss, far-field radiation pattern, S-parameters, envelope correlation coefficient, peak gain, diversity-gain and radiation efficiency. Our designed MIMO antenna has a very high isolation amongst the MIMO antennas (S21 < -25dB), a high Diversity-Gain (DG > 9.995 dB), a very low Envelope Co-relation Coefficient of (ECC < 0.001) and low Channel-Capacity-Loss (CCL < 0.1bits/s/Hz). The said antenna has an average radiation efficiency of 85.5% and a peak gain of (5.67dB) within the ultra-wideband (UWB) spectrum. A 0.8mm thick FR-4 substrate is used to fabricate the MIMO-antenna and tested in an anechoic chamber. The measured results closely match with the simulated results.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2021.3065441