Abstract
In this research paper, a <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$2\times 2$</tex> MIMO antenna is proposed which is capable of resonating for five narrow bands. The proposed antenna consist of four nested loops which are responsible of generating narrow bands and modified ground plane with etched rectangular slot. The MIMO antenna occupies the overall volume of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$30\times 60\times 1.60 \text{mm}^{3}$</tex> and is designed on FR4 substrate with permittivity <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\varepsilon_{\mathrm{r}}=4.40$</tex> and loss tangent <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\text{tan}\delta =0.02$</tex> , The proposed MIMO (Multiple-Input-Multiple-Output) antenna covers Global Systems for Mobile Communication (GSM), Wireless interoperability for Microwave Access (WiMAX) and Wireless Local Area Network (WLAN) bands. The proposed design is also analyzed with respect to diversity performance and far-field results.
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