Low Mutual Coupling Wideband 1x2 Rectangular Slot Micro-Strip Antenna

A very simple approach for bandwidth enhancement, reducing the mutual coupling and return loss of 1x2 rectangular patches multiple inputs and multiple outputs (MIMO) antenna for Wi-Max operation is proposed. Resonate frequency of proposed antenna is 6.2GHz. For enhancing the bandwidth a simple rectangular slot has been used and bandwidth is enhanced from 3% to 13% at -11dB of return loss. For reducing the mutual coupling two micro-strip lines are placed in between the two closely spaced (edge to edge separation of λo/10) rectangular patches which are connected to ground, to exhibits capacitive behavior which results in field cancellation. Return loss is reduced from -27 db to -38 dB and Mutual coupling is reduced from -20dB to -27dB at the center frequency 6.2GHz.