en 5-Antenna Antenna Research Paper Research Paper <p style="text-align: justify;">In this article, we present a new design of a coplanar waveguide fed (CPW-fed) ultra-wideband (UWB) antenna with dual band-notched characteristics. Two notched frequency bands are achieved by using two inverted U-shaped stepped impedance resonators. The proposed antenna can operate from 2.82 to 11 GHz (118%), defined by VSWR< 2, except two notched bands around 3.5 GHz (WiMAX) and 5.5 GHz (WLAN). The size of the antenna is 20&times;20&times;1.6 mm3. The experimental and simulated results of the prototyped antenna, including voltage standing wave ratio (VSWR), radiation pattern, and gain characteristics are presented and discussed. In addition, Analytical Hierarchy Process (AHP) method used for comparison the proposed antenna with previous designed structures.</p> Ultra-Wideband Antenna,Dual Band-Notched Characteristics,Inverted U-Shaped Stepped Impedance Resonators,AHP Framework, 205 211 http://ijeee.iust.ac.ir/browse.php?a_code=A-10-1987-1&slc_lang=en&sid=1 Y. Zehforoosh Yashar.zehforoosh@gmail.com 180031947532846005401 180031947532846005401 Yes Department of electrical engineering, Urmia branch, Islamic azad University, Urmia, Iran. M. Sefidi mehdi_sefidi@yahoo.com 180031947532846005402 180031947532846005402 No Department of Electrical Engineering, Miandoab branch, Islamic Azad University, Miandoab, Iran.