Abstract
This paper presents the design of a small and compact size dual band Microstrip line feed slot antenna and their 2×2 MIMO implementation for WLAN, Bluetooth, and WiMAX applications. The proposed slot antenna consist of a rectangular slot on the ground plane and a pair of U-shaped strips which are embedded symmetrically along the center line of the rectangular slot antenna. For increasing bandwidth of this antenna an octagonal slot is etched on ground plane and one side of this octagon is converted into a half octagon. The simulation results of the single antenna shows that the designed antenna is capable of operating over band 1 (2.26 GHz–2.58 GHz) for 2.4 GHz and band 2 (3.97–6.88 GHz) for 6.0 GHz. Next, a study was performed to implement this antenna in 2×2 MIMO arrangement on the same circuit space. The simulation results of the MIMO antenna shows that it is suitable for working in Bluetooth, WLAN and WiMAX applications. Acceptable antenna gain and nearly omnidirectional radiation pattern, better envelope correlation coefficient are achieved over the two operating bands. Next a study is performed to reduce mutual coupling between antennas. The proposed antenna is suitable for wireless communication systems.
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