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A MIMO Antenna Using I-Shaped Metamaterial Superstrate with Improved Gain and Isolation for Multiband Wireless Systems


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DOI: https://doi.org/10.15866/irecap.v13i4.23184

Abstract


This paper introduces a novel approach to the design of a two-port Multiple-Input Multiple-Output (MIMO) microstrip antenna by integrating an I-Shaped Metamaterial (ISMeTM) superstrate. The objective is to address the challenges of mutual coupling reduction and gain enhancement in MIMO antenna systems. The proposed antenna consists of an ISMeTM unit cell that is mounted on a FR-4 substrate with dimensions of 10×10 mm2 and thickness of 1.6 mm. A 3×5-unit cell array of the ISMeTM is used as a superstrate and is etched over the two-port MIMO patch antenna in order to enhance the performance of the antenna. The two-port MIMO antenna with the superstrate provides triple-band operation and operates over three resonance frequencies at 6.31, 9.09, and 11.41 GHz. A significant gain increase and mutual coupling reduction of 26 dB, 33 dB, and 22 dB over the three frequency bands at 6.31, 9.09, and 11.41 GHz, respectively, is achieved. The introduction of ISMeTM superstrate leads to a notable improvement in the antenna's overall performance. The design and simulation of the antenna are done using the Computer Simulation Technology (CST) studio suite and Matlab.
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Keywords


Multiple Input Multiple Output (MIMO); Mutual Coupling (Mu-CP); Metamaterial

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References


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