Design and investigation of modern UWB-MIMO antenna with optimized isolation

Abstract

This paper proposes a compact, semi-circular shaped multiple input multiple output (MIMO) antenna design with high isolation and enhanced bandwidth for ultrawide band (UWB) applications. A decoupling stub is used for high isolation reaching up to-55 dB over the entire bandwidth. The proposed antenna is used for UWB as well as super wide band (SWB) applications. The overall size of the proposed antenna is 18 × 36 × 1.6 mm3. The |S11| and voltage standing wave ratio (VSWR) of the proposed antenna are less than-10 dB and 2, respectively, in the range of 3-40 GHz. The total impedance bandwidth of the proposed design is 37 GHz. The VSWR, |S11|, |S22|, |S21|, |S12|, gain, envelope correlation coefficient (ECC), radiation pattern, and various other characteristic parameters are discussed in detail. The proposed antenna is optimized and simulated in a computer simulation technology (CST) studio, and printed on a FR4 substrate.