Design of dual band MIMO antenna with improved isolation

A compact dual band multiple input and multiple output (MIMO) antenna was proposed. It resonates at 5.93 and 7.68 GHz. A 2 × 1 MIMO antenna with edge to edge distance of λ0/25 (f = 5.93 GHz) developed and its performance is evaluated in terms of mutual coupling using three techniques: (a) defected g...

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Bibliographic Details
Published in:Microwave and optical technology letters 2019-06, Vol.61 (6), p.1579-1583
Main Authors: Pasumarthi, Srinivasa Rao, Kamili, Jagadeesh Babu, Avala, Mallikarjuna Prasad
Format: Article
Language:English
Subjects:
ACPS
Antennas
Correlation coefficients
DGS
ECC
MIMO
Mutual coupling
radiation pattern and VSWR
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Summary:A compact dual band multiple input and multiple output (MIMO) antenna was proposed. It resonates at 5.93 and 7.68 GHz. A 2 × 1 MIMO antenna with edge to edge distance of λ0/25 (f = 5.93 GHz) developed and its performance is evaluated in terms of mutual coupling using three techniques: (a) defected ground structure (DGS), (b) asymmetrical coplanar strips (ACPS), and (c) combination of DGS and ACPS. Results show that with DGS mutual coupling (S21) is reduced by −30.61 dB at 5.93 GHz and −29.5 dB at 7.68 GHz. Using ACPS mutual coupling (S21) is reduced by −27.91 dB at 5.93 GHz and −47 dB at 7.68 GHz. With ACPS and DGS mutual coupling (S21) is reduced by −58 dB at 5.93 GHz and −28.65 dB at 7.68 GHz. Its performance is also evaluated in terms of radiation patterns, VSWR, envelope correlation coefficient, and diversity gain.
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.31832