Abstract
This paper presents a miniaturized (13x13x0.8 mm(3)) quad-port MIMO antenna for 5G NR n257, n258, & n261 for mm-wave usage. The recommended antenna designed at 29 GHz chose an optimal design (Stage 3) after a careful examination of performance at numerous stages. The single radiating plane consists of an inverted L-shaped design with identical hexagonal slotted loaded DGS. The quad components of the MIMO antenna are set orthogonally for best inter-element mutual coupling. The key feature of the recommended design is (a) impedance bandwidth of 25 -29.5 GHz (Simulated) and 25 to 27.5 GHz or 28 to 29 (measured), along with outstanding mutual coupling of > 25 dB suitable for new radio frequency (RF) bands n257, n258, & n261 (b) an impressive peak gain of 9.5 dB at a full band. Diversity parameters, such as the envelope correlation coefficient (ECC), diversity gain (DG), TARC and channel capacity loss (CCL) are analyzed and calculated the performance characteristics of the proposed MIMO antenna. The suggested antenna's findings have been confirmed by experimental data and have been shown to be in close proximity to the simulated results.