Quad-port octagon slotted high isolation MIMO antenna for GSM1800 to X-band wireless applications

This research article outlines the evolution of an octagon slotted quad port MIMO antenna with enhanced isolation in 1.71–12 GHz band, which includes GSM1800 to X-bands. This MIMO is printed on an FR4 material substrate of area 78 × 78 mm 2 (0.343λ 0  × 0.343λ 0 ), where λ 0 is calculated at lower c...

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Bibliographic Details
Published in:Analog integrated circuits and signal processing 2023, Vol.114 (1), p.125-141
Main Authors: Garikipati, Srinivasu, Tangirala, Gayatri, Durbhakula, Manikya Krishna Chaitanya, Sharma, Virendra Kumar
Format: Article
Language:English
Subjects:
Antennas
Circuits and Systems
Decoupling
Design
Electrical Engineering
Engineering
MIMO communication
Radiators
Signal,Image and Speech Processing
Substrates
Superhigh frequencies
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Summary:This research article outlines the evolution of an octagon slotted quad port MIMO antenna with enhanced isolation in 1.71–12 GHz band, which includes GSM1800 to X-bands. This MIMO is printed on an FR4 material substrate of area 78 × 78 mm 2 (0.343λ 0  × 0.343λ 0 ), where λ 0 is calculated at lower cut off frequency, and 2 mm (0.009λ 0 ) inter-element separation between the radiators. It has four octagon slotted circular radiating elements placed orthogonally. The isolation of the presented MIMO design is enhanced by the introduction of decoupling networks. The performance characteristics are S 11  ≤ – 10 dB in the range 1.32–12.10 GHz, S 21  ≤ – 21.94 dB, and S 31  ≤ – 20 dB. The peak gain is 6.2 dBi, maximum efficiency is 96%. The diversity characteristics of the proposed design are ECC ≤ 0.03, MEG ratio ≈ 1, TARC ≤  − 10 dB, CCL 
ISSN:0925-1030
1573-1979
DOI:10.1007/s10470-022-02127-7