A four bands?notched UWB antenna based on novel electromagnetic band gap ( EBG) structures is pres?ented. The antenna is printed on a 1.5 mm thick substrate, which has a relative dielectric constant 3. In order to a?chieve the collaborative work between some narrow communication bands ( WIMAX, dual band of WLAN and downlink satellite communications signals in X band) and UWB antennas, by improving the mushroom?shaped EBG ( M?EBG) structure, the via is moved to the corner and the technology of meandering current is adopted, reducing the size and bandwidth of EBG unit effectively. On this basis, four novel EBG structures, which are resonant at 3.5, 5.25, 5.78 and 7.5 GHz, are designed and loaded at two sides of a hexagonal UWB antenna feeder sequential?ly. Simulation and test results show that the proposed antenna can meet the requirements of the UWB wireless com?munication system and suppress effectively the signals of four bands with high spectral utilization and stable omnidi?rectional radiation.