A $2\times 2$ MIMO Antenna With Multiband Characteristics Designed for GPS, WiMAX and WLAN Wireless Applications

In this research paper, a $2\times 2$ 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 $30\times 60\times 1.60 \text{mm}^{3}$ and is designed on FR4 substrate with permittivity $\varepsilon_{\mathrm{r}}=4.40$ and loss tangent $\text{tan}\delta =0.02$, 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.