A 4 × 4 multiple input multiple output (MIMO) rectangular patch antenna array loaded with massive sequentially rotated split ring resonators (SRR) operating at 3.5 GHz is presented for 5G new radio (NR) frequency range 1 (FR1) n77 mid band base station application. SRR are placed in such a novel arrangement to avoid radiation pattern overlapping and improve overall gain of antenna array. Each sub array consists of three layers, top layer is made up of 2 × 2 patch elements each surrounded with four rings of sequentially rotated split ring resonators to support high port pattern isolation, middle layer act as ground plane, bottom layer consists of calculated corporate feeding network which feed antenna elements using via through ground plane at an optimized location to achieve impedance matching. More than 100 MHz impedance bandwidth, at least 14.47 dBi gain for any sub array, more than 90% of efficiency, 0.0027 of envelop correlation coefficient (ECC) and port isolation less than −25 dB is achieved using proposed MIMO array system. Overall, 20.6 dBi gain is achieved for whole array system. Leveraging a novel interlaced subarray topology, this work achieves superior port to port isolation and improved gain compared to prior state of the art MIMO designs. These optimistic results make proposed array an excellent candidate for 5G base station application.