ET Docket 98 - 153, Federal Communication Commissions (FCC), "First Report and Order, Revision of Part15 of the Commission’s Rules Regarding Ultra-Wideband Transmission Systems," Washington, DC, Technical Report, February 14, 2002.
 N. M. Awad and M. K. Abdelazeez, "Multi Slot Microstrip Antenna for Ultra-Wideband Applications," Journal of King Saud University – Engineering Sciences, vol. 30, no. 1, pp. 38-45, 2018.
 N. M. Awad, M. K. Abdelazeez and A. Al-Sharif, "Enhanced UWB Printed Monopole Antenna Based on Ground Plane Modifications," Jordanian Journal of Computers and Information Technology (JJCIT), vol. 4, no. 1, 2018.
 Y. S. Hu, M. Li, G. P. Gao, J. S. Zhang and M. K. Yang, "A Double-printed Trapezoidal Patch Dipole Antenna for UWB Applications with Band-notched Characteristics," Progress in Electromagnetics Research (PIER), vol. 103, pp. 259-269, 2010.
 Z. Ul Abedin and Z. Ullah, "Design of a Microstrip Patch Antenna with High Bandwidth and High Gain for UWB and Different Wireless Applications," International Journal of Advanced Computer Science and Applications (IJACSA), vol. 8, no. 10, 2017.
 V. Sharbati, P. Rezaei and M. M. Fakharian, "Compact Planar UWB Antenna with Enhanced Bandwidth and Switchable Band-Notch Function for WLAN and DSRC," IETE Journal of Research, vol. 63, no. 6, pp. 805-812, 2017.
 A. Dastranjand F. Bahmanzadeh, "A Compact UWB Antenna Design Using Rounded Inverted L-Shaped Slots and Bevelled Asymmetrical Patch," Progress in Electromag. Research C, vol. 80, pp. 131-140, 2018.
 R. M. Elsagheer, "Study on Bandwidth Enhancement Techniques of Microstrip Antenna," Journal of Electrical Systems and Information Technology, vol. 3, pp. 527-531, 2016.
 A. A. Deshmukh, A. A. Desai, S. A. Shaikh, K. A. Lele and S. Agrawal, "Formulations for Hexagon- Shaped Ultra-Wide Band Antennas," International Conference on Communication Technology (ICCT 2015), New York, USA, 2015.
 S. Morya, S. Saxena, S. Singh and R. Mohan, "Study and Design of Hexagonal Patch Antenna for UWB System," International Research Journal of Engineering and Technology (IRJET), vol. 4, no.4, 2017.
 T. Mandal and S. Das, "Microstrip Feed Spanner Shape Monopole Antennas for Ultra-Wide Band Applications," Journal of Microwaves, Optoelec.and Electromag. App., vol. 12, no. 1, pp. 15-22, 2013.
 T. Nilakhe and V. V. Patil, "Bandwidth Enhancement through Fractal Nature of Hexagonal Microstrip Patch Antenna," International Journal of Science, Engineering and Technology Research (IJSETR), vol. 5, no. 6, pp. 1936-1940, 2016.
 B. Premalatha, M. V. S. Prasad and M. B. R. Murthy, "Compact Hexagonal Monopole Antenna," Indian Journal of Science and Technology, vol. 10, no. 19, 2017.
 D. Aissaoui, L. M. Abdelghani, N. Boukli-Hacenand T. A. Denidni, "CPW-Fed UWB Hexagonal-Shaped Antenna with Additional Fractal Elements," Microwave and Optical Technology Letters, vol. 58, no. 10, pp. 2370-2374, 2016.
 G. Al-Jaafreh, Hexagonal Printed Circuit Antenna for Wireless Communication, M. Sc. Thesis, Electrical Engineering Department, The University of Jordan, April 2018.
 D. M. Pozar, Microwave Engineering, Third Edition, New York, Wiley, 2005.
 N. Chattoraj, "Effect of Ground Plane on a Tapered U Slot Ultra-Wideband Antenna," International Journal of Computer Applications (IJCA), Foundation of Computer Science (FCS), no. 2, pp. 8-11, 2013.
 C.- C. Lin, K.-Y. Kan and H.-R. Chauang, "A 3-8 GHz Broadband Planar Triangular Sleeves Monopole Antenna for UWB Communication," IEEE Antenna and Propagation Society Inter. Sym., USA, 2007.
 M. J. Amman, "Control of the Impedance Bandwidth of Wideband Planar Monopole Antennas Using a Bevelling Technique," Microwave and Optical Technology Letters, vol. 30, no. 4, pp. 229-232, 2001.
 S. Jacob and P. Mohanan, Design and Analysis of Printed UWB Antenna with Dual Band-notched Characteristics, Doctoral (PhD) Thesis, Cochin University of Science and Technology, 2015.