Open Ended Microstrip-line-fed Compact Wideband MIMO-Diversity Antenna with Multiple Asymmetric Elliptical Wide-Slots

This paper presents a compact, multiple-input-multiple-output (MIMO) microstrip-line-fed wide-slot antenna with good isolation for wideband applications. The proposed antenna consists of a large wide-slot formed by four asymmetric elliptical wide-slots (AEWSs) of different dimensions. These AEWSs when merged together, give the wideband response of 7.71 GHz (5.77-13.48 GHz; 80.1%) and good isolation with |S
₂₁
| <; -20 dB. The peak gain and maximum radiation efficiency of 8.66 dB and 88.58% respectively are obtained within the passband. The proposed antenna shows good diversity performance in terms of exceptionally low envelope correlation coefficient (<;0.003) and low capacity loss of 0.12. Also, the maximum multiplexing efficiency of 88.56% (or -1.05 dB) along with total active reflection coefficient below 0 dB are reported in the entire frequency band. The proposed MIMO antenna has compact overall dimensions of 22×24 mm
²
that makes it a suitable candidate for modern handheld and portable wireless devices.