Design and implementation of MIMO antenna using swastika slot for wireless applications

Abstract

MIMO (Multiple-Input Multiple-Output) antenna has gained a lot of attention for research today due to various advantages such as increase in capacity, low signal loss, and less multipath fading. The main objective of this work is to design and implement a compact antenna using MIMO systems to reduce the mutual coupling between the antenna elements and to provide high isolation for Wi-Fi (2.4 GHz to 5 GHz) & Bluetooth (2.4 GHz to 2.57 GHz) and WLAN 802.11(2.4-2.485 GHz) applications. Different shapes of MIMO antennas are implemented but they have some interference with high mutual coupling and low gain. In order to avoid this, “Dumbell” shaped patch is introduced with a ‘Swastika’ slot between the patches. The antenna is designed over a frequency of 2.51GHz using FR-4 epoxy as a substrate material. The proposed antenna shows better performance than many existing systems with an overall size of 93.02 × 54.72 mm2 having isolation better than-16 dB, obtained gain of 8.29 dB and envelope correlation coefficient (ECC) is investigated about 0.0092. The proposed MIMO antenna is simulated using HFSS 18.0 (High Frequency Structural Simulator) software and fabricated to validate the results. It is clearly observed that simulated results are close to practical measured results.