Compact MIMO Antenna with Improved Isolation for 5g/Ultra-Wideband Communications

In this contribution, a compact 13 GHz notched band Multiple-Input Multiple-Output (MIMO) antenna with improved isolation is presented for Ultra-Wide Band/broadband communication in millimetre wave band. The antenna structure has been designed on a single substrate of FR-4 of thickness 1.6 mm. Two symmetrical microstrip patch antenna elements positioned in vertical direction to realised better diversity performance. The antenna elements are made up of a rectangular patch with microstrp feed line, operating on the frequency of 28 GHz for Ultra-wide band applications. To improve the isolation between two orthogonal antenna elements, one diagonal slot line is cut on ground plan. The result of designed structure has been computed numerical by FEM based solver HFSS v 13. From the simulation result it is clear that the bandwidth of proposed MIMO antenna structure covers 24.048 GHz to 37.04 GHz with bandwidth of 13 GHz and S11 better than - 10dB and also the isolation is found better than -20 dB in over all bandwidth. The gain of proposed MIMO antenna designed structure has found satisfactory approximately 2.39 dB which is 13.27% more than antenna-1.