A triangular MIMO array antenna with a double negative metamaterial superstrate to enhance bandwidth and gain


Ojo, Rasheed and Jamlos, Mohd Faizal and Soh, Ping Jack and Jamlos, Mohd Aminudin and Bahari, Norfatihah and Lee, Yeng Seng and Al‐Bawri, Samir Salem and Abdul Karim, Mohamad Shaiful and Khairi, Khairil Anuar (2020) A triangular MIMO array antenna with a double negative metamaterial superstrate to enhance bandwidth and gain. International Journal of RF and Microwave Computer-Aided Engineering, 30 (8). ISSN 1096-4290

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Multiple-input-multiple-output (MIMO) array antenna integrated with thedouble negative metamaterial superstrate is presented. The triangularmetamaterial unit cell is designed by combining two triangular elements posi-tioned in complementary on the same plane at different sizes. Such designwith more gaps is used to excite rooms for more capacitance effects to shift theresonance frequency thus enlarging the bandwidth of the MIMO antenna. Theunit cell is arranged in 7×7 periodic array created a superstrate metamaterialplane where theCstrayexists in parallel between the two consecutive cells. It isfound that the existence ofCstrayand gaps for each unit cells significantlyinfluenced the bandwidth of the MIMO antenna. The higher value of thecapacitance will lead to the negativity of permittivity. The superstrate plane isthen located on top of the 4×2 MIMO with a gap of 5 mm. The integrationresulted in improving the bandwidth to 12.45% (5.65-6.4GHz) compared toonly 3.49% bandwidth (5.91-6.12GHz) of the MIMO antenna itself. Moreover,the negative permeability characteristic is created by a strong magnetic fieldbetween the complementary unit cells to have 14.05-dBi peak gain. Besidesthat, the proposed antenna managed to minimize the mutual coupling andimprove the mean effective gain, envelope correlation coefficient, and mul-tiplexing efficiency.

Item Type: Article
Uncontrolled Keywords: Antenna arrays, double negative (DNG) metamaterial superstrate, MIMO
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics > TK7871 Electronics--Materials
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Rosnani Abd Wahab
Date Deposited: 15 Dec 2020 12:34
Last Modified: 15 Dec 2020 12:34
URII: http://shdl.mmu.edu.my/id/eprint/7861


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