PIFAS antennas design for mobile communications

To answer to the increasing demand of antennas for portable terminals, many works were carried out these last years starting from the shorted-circuit quarter wave antenna more commonly called PIFA (Planar Inverted-F Antenna). These antennas have for principal advantages, their compactness and their weak manufacturing costs, in addition to their significant performances. In this article, we present new geometries for this antenna type. The element feed is carried out by means of a coaxial probe. The suggested structure design, starting from a simple PIFA antenna, by HFSS and IE3D software makes it possible to have Bi-bands, tri-bands and quadribands antennas. The obtained results are then presented and commented.