 A printed inverted @-@ F antenna can be implemented in the classic inverted @-@ F shape , usually to one side of the circuit board where the ground plane has been removed from underneath the antenna . However , another approach is a modified patch antenna , the shorted patch antenna . In this approach , one edge of the patch , or some intermediate point , is grounded with grounding pins or <unk> through to the ground plane . This works on the same principle as an inverted @-@ F ; viewed sideways , the F shape can be seen , it is just that the antenna element is very wide in the horizontal plane . The shorted patch antenna has a wider bandwidth than the thin line type due to the greater radiation area . Like the thin line type , the shorted patch antenna can be printed on the same printed circuit board as the rest of the circuitry . However , they are commonly printed on to their own board , or on to a dielectric fixed to the main board . This is done so that the antenna , can be suspended and effectively be in air dielectric , is a greater distance from the ground plane than it would otherwise be , or the dielectric used is a more suitable material for RF performance . 
