Triple band-notched UWB antenna with tapered microstrip feed line and slot coupling for bandwidth enhancement

A new kind of triple band-notched antenna for ultrawideband (UWB) application is proposed, which can reject potential interference with the existing wireless systems including WiMAX, WLAN and X-Band communication. All the three notched bands are obtained by etching a bent and folded slot and a dipole-like resonator slots on the antenna radiating patch. A tapered microstrip feedline is introduced for good impedance matching. Furthermore, slot coupling is introduced to achieve a steep lower band characteristic. The antenna shows band-notched characteristics at the frequencies of 3.55 GHz (WiMAX), 5.75 GHz (WLAN) and 8.27 GHz (X-Band upper band). Good agreement between the simulation and measured results is observed, suggesting that the proposed antenna is suitable for the UWB communication application.