Abstract
In the present paper, a multi-band circle shape MIMO radiator with and without dumbbell-shaped parasitic element for all wireless applications is proposed. The proposed antenna comprises MIMO circular shape radiating patch with U-shaped inverted slot and pair of rectangular slits. By adjusting U-shaped inverted slot, a pair of rectangular slits and neutralisation line we obtain distinct resonance frequencies centred at 3.5, 5.3, 7.0 and 8.8 GHz. The VSWR results are centred on ≤ 2 at these resonant frequencies. The far field values obtained at a wide operational bandwidth, the simulated results represent that the multi-band antenna can cover sufficient bandwidth for entire frequency bands. The multi-band antenna also shows a radiation pattern of an omni directional with an acceptable average peak gains at the resonant frequencies are 5.238 dBi, 7.044 dBi, 6.763 dBi and 7.852 dBi of LTE/WLAN bands, WiMAX band, and ITU and satellite band system applications.
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