H EL-Tamaly, HassanM. Eltayeb, MaherAbd El Hamid Salem, Deena2020-02-172020-02-172013[1] Rezaul Azim, Mohammad Tariqul Islam." Compact TaperedShape Slot Antenna for UWB Applications", IEEE antennas and wireless propagation letters , Vol.10, 2011 , pp. 1190-1193. [2] First Report and order, "Revision of part 15 of the commission's Rule Regarding Ultra-Wideband Transmission System FCC 02-48", Federal Communication Commission, 2002. [3] D.Rajesh, P.K. Sahu, S.K. Behera, "A Compact UWB Parasitic Microstrip Antenna with Band Dispensation", IEEE International Conference on Devices and Communications ( ICDeCom), 2011, pp. 1-5. [4] Osama M. Haraz, Ayman Elboushi, Abdel-Razik sebak, "Band Rejection Capabilities of UWB Elliptical Slot Antenna with Half Circular and Crescent Ring Shaped Radiators", IEEE international Symposium on Antennas and propagation, Canada, 2010, pp. 1-4. [5] X. Li, L. Yang, S.-X. Gong, Y.-J. Yang, "Ultra-Wideband Monopole Antenna with Four-Band-Notched Characteristics ", Progress In Electromagnetics Research Letters, Vol.6, 2009, pp. 27-34. [6] Xianglong Liu, Yingzeng Yin, Pingan Liu, Junhui Wang, Bin Xu, " A CPW-Fed Dual Band-Notched UWB Antenna with a Pair of Bended Dual-L-Shape Parasitic Branches ", Progress In Electromagnetics Research , Vol.136, , 2013, pp. 623-634. [7] F. Zhu, S. Gao, A. T. S. Ho, C. H. See, R. A. Abd-Alhameed, J. Li, J. Xu , " Design and Analysis of Planar Ultra-WideBand Antenna with Dual Band-Notched Function ", Progress In Electromagnetics Research , Vol.127, 2012, pp. 523-536. [8] Zhi-Qin Wang, Wei Hong, Zhen-Qi Kuai, Cheng Yu, Yan Zhang, Yuan-Dan Dong, " Compact Ultra-Wideband Antenna with Multiple Notches ", IEEE International Conference on Microwaves and Millimeter Wave Technology (ICMMT),Vol. 3, 2008, pp. 1030-1033. [9] G.-M. Zhang, J.-S.Hong, B.-Z. Wang, "Two Novel BandNotched UWB Slot Antenna Fed by Microstrip Line", Progress in Electromagnetics Research, PIER 78, 2008 pp. 209-218. [10] Hassan H. EL-Tamaly, Maher M. Eltayeb, Deena Abd El Hamid Salem, Korany M.Ragab, " A Compact Planar UWB Monopole Antenna with Double Notches and Bluetooth Support ", The Online Journal on Electronics and Electrical Engineerring (OJEEE), Vol.5 – No.2, 2012 Reference Number: W13_E_0015 , pp. 544-548. [11] C. M. Li, L. H. Ye, " Improved Dual Band-Notched UWB Slot Antenna with Controllable Notched Band Widths ", Progress In Electromagnetics Research, Vol.115, 2011, pp. 477-493. [12] S.-T. Fan, Y.-Z. Yin, H. Li, S.-J. Wei, X.-H. Li, L. Kang, "A Novel tri-Band Printed Monopole Antenna with an Etched ∩-Shaped Slot and a Parasitic Ring Resonator for WLAN and WIMAX applications ", Progress In Electromagnetics Research letters , Vol.16, 2010, pp. 61-68.ISSN (Print): 1694-0814ISSN (Online): 1694-0784https://t.ly/g7x8WMSA Google ScholarA new modified compact microstrip line-fed Ultra-Wide Band (UWB) tapered- shape antenna with WLAN (5.5GHz) band notch function using inverted C-slot is presented. The overall antenna dimensions are 22x24 mm2 fabricated on FR4 substrate with a thickness h of 1.5mm and a relative permittivity εr of 4.5 and easily fed by a 50Ω microstrip line. A complete analysis on the inverted C-slot was simulated and measured. The modified antenna is successfully fabricated and measured. Simulation and measurements agree that the modified antenna has a stable gain, high radiation efficiency(about 90%), and near omni-directional radiation pattern within the UWB operating frequency range while a good characteristics are obtained at the specified notch with a low gain of -4.2dB and VSWR of 6.3 .enUltra wide band (UWB) antennaMicrostrip fed lineSlot antennaNotch band.Article