1. Mitola, J. and G. Q. Maguire, "Cognitive radio: Making software radios more personal," IEEE Pers. Commun., Vol. 6, No. 4, 13-18, Aug. 1999.
doi:10.1109/98.788210
2. Chen, K.-C. and R. Prasad, Cognitive Radio Networks, John Wiley & Sons, West Sussex, United Kingdom, 2009.
3. Arslan, H. and M. Sahin, "UWB-based cognitive radio networks," Cognitive Wireless Communication Networks, Springer, USA, 2007.
4. Zhang, H., X. Zhou, and T. Chen, "Ultra-wideband cognitive radio for dynamic spectrum accessing networks," Cognitive Radio Networks, CRC Press, Boca Raton, Florida, 2009.
5. Parks, T. and J. McClellan, "Chebyshev approximation for nonrecursive digital filters with linear phase," IEEE Transactions on Circuit Theory, Vol. 19, No. 2, 189-194, Mar. 1972.
doi:10.1109/TCT.1972.1083419
6. McClellan, J. and T. Parks, "A personal history of the Parks-McClellan algorithm," IEEE Signal Processing Magazine, Vol. 22, No. 2, 82-86, Mar. 2005.
doi:10.1109/MSP.2005.1406492
7. Shi, X., "Adaptive UWB pulse design method for multiple narrowband interference suppression," The 2010 IEEE International Conference on Intelligent Computing and Intelligent Systems (ICIS 2010), 545-548, Missouri, USA, 2010.
8. Hopfield, J. J., "Neural networks and physical systems with emergent collective computational abilities," Proceedings of the National Academy of Sciences, Vol. 79, 2554-2558, Washington DC, USA, 1982.
9. Powell, J. D., "Radial basis function approximations to polynomials," Numerical Analysis 1987, 223-241, Dundee, UK, 1987.
10. Bin, L., Z. Zheng, and Z. Weixia, "A novel spectrum adaptive UWB pulse: Application in cognitive radio," The 2009 IEEE Vehicular Technology Conference, 1-5, Anchorage, AK, USA, 2009.
11. Kanj, H. and M. Popovic, "Microwave-range broadband Dark Eyes antenna: Detailed analysis and design," IEEE Antennas and Wireless Propagation Letters, Vol. 4, 262-265, 2005.
doi:10.1109/LAWP.2005.852995
12. Pendry, J. B., A. J. Holden, D. J. Robbins, and W. J. Stewart, "Magnetism from conductors and enhanced nonlinear phenomena," IEEE Trans. Microw. Theory Tech., Vol. 47, No. 11, 2075-2084, 1999.
doi:10.1109/22.798002
13. Falcone, F., T. Lopetegi, M. A. G. Laso, J. D. Baena, J. Bonache, M. Beruete, R. Marques, F. Martn, and M. Sorolla, "Babinet principle applied to the design of metasurfaces and metamaterials," Physical Review Letters, Vol. 93, No. 19, 197401-1-197401-4, Nov. 2004.
14. Ansoft HFSS, Pittsburg, PA 15219, USA.
15. Agilent ADS, Santa Clara, CA 95051, USA.
16. Li, C.-M. and L.-H. Ye, "Improved dual band-notched UWB slot antenna with controllable notched bandwidths," Progress In Electromagnetics Research, Vol. 115, 477-493, 2011.
17. Liao, X.-J., H.-C. Yang, N. Han, and Y. Li, "Aperture UWB antenna with triple band-notched characteristics," Electronics Letters, Vol. 47, No. 2, 77-79, Jan. 2011.
doi:10.1049/el.2010.3116
18. Al-Husseini, M., A. Ramadan, A. El-Hajj, K. Y. Kabalan, Y. Tawk, and C. G. Christodoulou, "Design based on complementary split-ring resonators of an antenna with controllable band notches for UWB cognitive radio applications," The 2011 IEEE International Symposium on Antennas and Propagation (APS/URSI 2011), 1120-1122, Spokane, WA, USA, Jul. 3-8, 2011.
19. Gardner, P., P. S. Hall, M. R. Hamid, and F. Ghanem, "Reconfigurable antennas for cognitive radio," The 2011 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC 2011), 1225-1228, Torino, Italy, Sept. 12-16, 2011.
20. Al-Husseini, M., A. Ramadan, M. E. Zamudio, C. G. Christodoulou, A. El-Hajj, and K. Y. Kabalan, "A UWB antenna combined with a reconf-gurable bandpass filter for cognitive radio applications," The 2011 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC 2011), 902-904, Torino, Italy, Sept. 12-16, 2011.