A simple structure for achieving low mutual coupling between two inverted-F antennas at 2 GHz is studied. The two inverted-F antennas have a rectangular shaped ground plane. Mutual coupling between the antennas can be reduced by using two slits cut into the ground plane. A mutual coupling of -25 dB is achieved at the resonance frequency of 2 GHz. This is 16 dB lower than the structure without slit in the ground plane.
