  The proposed UWB antenna covers mobile communications (GSM, EDG, UMTS(3G),
LTE(4G)) and wireless networks (WIFI, WiMAX), within a theoretical bandwidth
defined from 780MHz to 4.22GHz. The UWB antenna is designed and realized on a
FR-4 substrate with an electrical permittivity of 4.4. It presents a 98.75%
average analytical efficiency and an omnidirectional radiation within the
previous bandwidth. The impedance excitation port is fixed at 50 Ohm according
with the SMA impedance used in the practical part. The measured results are in
good agreement with those obtained using CST and ADS softwares. The measured
bandwidth, defined from 980MHz to 4.2GHz, presents an efficiency of 94.14%.
Furthermore, the practical radiation diagram and the excitation port impedance
stay the same as that the simulation one.
