This paper describes the design and simulation by HFSS simulator of a probe-fed Planar Inverted-F Antenna (PIFA) for the use in GSM900 band [890 MHz - 960 MHz] and DCS1800 band [1710 MHz - 1880 MHz]. A methodology based on parametric simulations (parameters are ground plan lenght, height of radiating plate, feeding point position, shorting plate width and position) was used to design optimized antenna. The simulation allowed the characterization of the designed antenna and the computing of different antenna parameters like S11 parameter, resonant frequency, VSWR, bandwidth, impedance in feeding point, gain, diagram pattern and Fields distribution. The results were very interesting and respect the GSM requirements.
 K. L. Virga and Y. Rahmat-Samii, “Low-Profile Enhanced Bandwith PIFA for Wireless Communications Packaging,” IEEE Transactions on Microwave Theory and Techniques, Vol. 45, No. 10, 1997, pp. 1879-1888. doi:10.1109/22.641786
 W.-J. Liao, T.-M Liu and S.-Y. Ho, “Miniaturized PIFA Antenna for 2.4 GHz ISM Band Applications,” IEEE Proceedings of the 6th European Conference on Antennas and Propagation (EUCAP), Prague, March 2012, pp. 3034-3037.
 A. K. Skrivervik, J.-F. Zürcher, O. Staub and J. R. Mosig, “PCS Antenna Design: The Challenge of Miniaturiza- tion,” IEEE Antennas and Propagation Magazine, Vol. 43, No. 4, 2001, pp. 12-27. doi:10.1109/74.951556
 PIFA: The Planer Inverted F Antenna. http://www.antenna-theory.com/antennas/patches/pifa.php
 H. T. Chattha, Y. Huang, M. K. Ishfaq and S. J. Boyes, “A Comprehensive Parametric Study of Planar Inverted-F Antenna,” Wireless Engineering and Technology, Vol. 3, 2012, pp. 1-11. doi:10.4236/wet.2012.31001