An antenna system comprising: first and second planar inverted-F antennas (PIFAs), each of the first and second PIFAs being operable within at least a first frequency range and a second frequency range different than the first frequency range and comprising: an upper radiating patch element having a slot, a lower surface spaced apart from the upper radiating patch element; a first shorting element electrically connecting the upper radiating patch element to the lower surface, a second shorting element electrically connecting the upper radiating patch element to the lower surface, the second shorting element configured to have a length greater than a spaced distance separating the upper radiating patch element and lower surface; and a feeding element electrically connected between the upper radiating patch element and the lower surface; a ground plane, the lower surface of each of the first and second PIFAs being mechanically and electrically connected to the ground plane; a first isolator disposed between the first and second PIFAs, the first isolator including a vertical wall portion that is generally rectangular and perpendicular to the ground plane, whereby the first isolator is operable for increasing isolation between the first and second PIFAs; and a second isolator extending outwardly from the ground plane and including a first portion extending vertically upwards from the ground plane and a second portion extending from the first portion generally parallel to the ground plane. first and second planar inverted-F antennas (PIFAs), each of the first and second PIFAs being operable within at least a first frequency range and a second frequency range different than the first frequency range and comprising: an upper radiating patch element having a slot, a lower surface spaced apart from the upper radiating patch element; a first shorting element electrically connecting the upper radiating patch element to the lower surface, a second shorting element electrically connecting the upper radiating patch element to the lower surface, the second shorting element configured to have a length greater than a spaced distance separating the upper radiating patch element and lower surface; and a feeding element electrically connected between the upper radiating patch element and the lower surface; an upper radiating patch element having a slot, a lower surface spaced apart from the upper radiating patch element; a first shorting element electrically connecting the upper radiating patch element to the lower surface, a second shorting element electrically connecting the upper radiating patch element to the lower surface, the second shorting element configured to have a length greater than a spaced distance separating the upper radiating patch element and lower surface; and a feeding element electrically connected between the upper radiating patch element and the lower surface; a ground plane, the lower surface of each of the first and second PIFAs being mechanically and electrically connected to the ground plane; a first isolator disposed between the first and second PIFAs, the first isolator including a vertical wall portion that is generally rectangular and perpendicular to the ground plane, whereby the first isolator is operable for increasing isolation between the first and second PIFAs; and a second isolator extending outwardly from the ground plane and including a first portion extending vertically upwards from the ground plane and a second portion extending from the first portion generally parallel to the ground plane.