Mutual coupling reduction for 5 GHz PIFAs in MIMO terminal

In this paper, two planar inverted-F antennas on a slitted ground plane is proposed for MIMO mobile terminal. This antenna is designed to operate at 5 GHz with 1 GHz bandwidth. In simulation stage, the length and width of slitted are varied. The optimum slit's dimension is shown to be λ/4 length and 0.0333λ width, which produced reflection coefficient of −16.38 dB and isolation of −23.52 dB at 5 GHz, while maintaining 1 GHz bandwidth. It is found that the slitted ground plane has resulted a better isolation of 7.2 dB compared to the full ground plane. Simulated and measured results indicate a satisfactory agreement.