A dual notched band MIMO slot antenna system with Y-shaped defected ground structure for UWB applications

摘要

In this letter, a compact ultrawideband polarization diversity MIMO antenna system with dual band-notched characteristics is proposed. The proposed antenna element consists of a metal ground with a stepped slot etched on it. The stepped slot is fed by a 50- microstrip line on the top layer. Dual notched bands (5G WLAN and 8G X band) are achieved by etching an open ended slot and a split ring resonator in the ground plane, respectively. Two identical antenna elements are arranged orthogonally and fed perpendicularly to obtain polarization diversity and enhance port isolation. A simple Y-shaped defected ground structure is etched in the ground plane to suppress mutual coupling between two antennas and improve the impedance matching. Diversity performance in term of envelop correlation coefficient (ECC) and mean effective gain (MEG) are studied. The simulated and measured results show good agreement, which demonstrates that the proposed MIMO antenna system can be a good candidate for UWB MIMO system applications. (c) 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:626-630, 2016