Rectangular monopole antenna with arrow-shaped slot etching for UWB-MIMO application

This paper proposes the rectangular monopole antenna with arrow-shaped slot etching for multiple-input multiple-output (MIMO) application. The presented antenna system works efficiently in the frequency range of 3.1-10.6 GHz for ultra-wideband (UWB) communications which are defined by the Federal Communications Commission (FCC) band. The proposed antennas were fabricated on FR4 substrate with dimensions 34×80 mm2, dielectric constant (εr) of 4.3 and substrate thickness (h) of 0.764 mm. The antenna structures were placed in four different positions. The measured results have been found that the alignment of antenna element in the orthogonal position which has low mutual coupling of less than -22.5 dB and obtains the best envelope correlation coefficient of less than 0.001. The radiation patterns are omnidirectional style.