Flexible planar inverted F antenna

摘要

A flexible inverted “F” antenna (PIFA) is shown. The flexible PIFA is not only applicable to flat surfaces, but it can be applied to curved surfaces, both convex and concave, without degrading performance. The flexible PIFA can also be used close to living bodies or to a metal surface without detuning. The flexible PIFA is formed from a flexible printed circuit board (PCB) having a metal layer on one side and over which a cover layer is positioned. The flexible PCB is folded, on its reverse side, around a flexible dielectric element with the covered metal layer facing outward to form a metal conducting service, an impedance matching stub and a ground plate. An adhesive layer forms a portion of the ground plate that is not in contact with the dielectric element. This adhesive layer is applied against the desired surface. A coaxial cable is electrically coupled to corresponding feed and ground tabs at the short circuit plate portion of the flexible PIFA.

主权项

1. A flexible planar inverted “F” antenna (PIFA), said flexible PIFA comprising:
a flexible printed circuit board (PCB) having a metal layer on a first side that is covered by a cover layer, said flexible PCB comprising a second side opposite said first side; a flexible dielectric element around which said second side is folded to form a main element and a ground plate that are substantially parallel to each other such that the main element and the ground plate are defined by the flexible PCB; a cable having a first end electrically connected to said metal layer and having a second end adapted to electrically connect to a wireless device; and wherein said flexible PIFA comprises an antenna performance when electrically connected to said wireless device and wherein said antenna performance is maintained when said main element and ground plate are bent into a concave shape or into a convex shape.