In recent years planar inverted-F antenna stay as one of the most popular antenna used in mobile phone, because of its low profile, light weight and simple structure. This study presents a simulation of a planar inverted-F antenna (PIFA) with a radiating plate to the associated ground plane by a shorting plate and a FR-4 substrate between the ground plane and the radiating plate. The PIFA antenna is fed by a coaxial cable through a SMA connector. In this work the different parameters are changed to observe their effects on the characteristics of PIFA as the resonance frequency, the length of the bandwidth and the radiation pattern. The kind of this PIFA element is to cover a wide frequency band from 2.31 GHz to 2.71 GHz; therefore, we can find these applications: Wi-Fi (2.45GHz), Bluetooth (2.4 GHz) and the two Long Term Evolution bands (LTE 2.3GHz, LTE 2.5GHz) includes.