Compact, high isolation, and dual‐polarized differential dual‐notched UWB‐MIMO slot antenna

A compact differentially fed ultrawideband-multiple-input multiple-output (UWB-MIMO) antenna with very high isolation, dual-polarization, and dual-notched bands is proposed in this letter. The proposed MIMO antenna consists of two pairs of differential ports which share a common circular radiation slot, making the proposed UWB-MIMO antenna as compact as one antenna element with the size of 30 × 30 mm2. By arranging two pairs of differential ports orthogonally in the virtual ac ground of each other, the differential isolation can be infinite theoretically and dual-polarization are obtained. To achieve dual notch-band, half-wavelength stubs and slits are introduced. Besides, the radiation characteristic and diversity performance are discussed. Good agreement is achieved between the measured results and simulated results. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2609–2614, 2015