1. Yang, L. Q. and G. B. Giannakis, "Ultra-wideband communications: An idea whose time has come," IEEE Signal Processing Magazine, Vol. 21, No. 6, 26-54, 2004.
doi:10.1109/MSP.2004.1359140
2., Federal Communications Commission (FCC), ``First report and order," 2002.
3. Yazdandoost, K. Y. and R. Kohno, "Ultra-wideband antenna," IEEE Communication Magazine, Vol. 42, No. 66, 29-32, 2004.
doi:10.1109/MCOM.2004.1304230
4. Ma, T. and S. Wu, "Ultra-wide band band-notched folded strip monopole antenna," IEEE Trans. Antennas Propag., Vol. 55, No. 11, 2473-2479, 2007.
doi:10.1109/TAP.2007.904137
5. Medeiros, C. R., J. R. Costa, and C. A. Fernandes, "Compact tapered slot UWB antenna with WLAN band rejection," IEEE Antennas and Wireless Propagation Letters, Vol. 8, 661-664, 2009.
doi:10.1109/LAWP.2009.2022063
6. Lazaro, A., D. Girbau, and R. Villarino, "Simulated and experimental investigation of microwave imaging using UWB," Progress In Electromagnetics Research, Vol. 94, 263-280, 2009.
doi:10.2528/PIER09061004
7. Chen, Z., "Novel bi-arm rolled monopole for UWB applations," IEEE Trans. Antennas Propag., Vol. 53, 672-677, 2005.
doi:10.1109/TAP.2004.841285
8. Klemm, M., I. Z. Kovcs, G. F. Pedersen, and G. Troster, "Novel small-size directional antenna for UWB WBAN/WPAN appliations," IEEE Trans. Antennas Propag., Vol. 553, No. 12, 3383-3896, 2005.
9. Ma, T. and S. Jeng, "Planar miniature tapered-slot-fed annular slot antennas for ultrawide-band radios," IEEE Trans. Antennas Propag., Vol. 53, No. 3, 1194-1202, 2005.
doi:10.1109/TAP.2004.842648
10. Cho, Y., K. Kim, D. Choi, S. Lee, and S. Park, "Miniature UWB planar monopole antenna with 5-GHz band-rejection filter and the time-domain characteristics," IEEE Trans. Antennas Propag., Vol. 54, No. 5, 1453-1460, 2006.
doi:10.1109/TAP.2006.874354
11. Powell, J. and A. Chandrakasan, "Differential and single ended elliptical antennas for 3.1--10.6 GHz ultra wideband communication," IEEE Int. Symp. Antennas Propag., Vol. 3, 2935-2938, 2004.
12. Chair, R., A. A. Kishk, and K. F. Lee, "Ultrawide-band coplanar waveguide-fed rectangular slot antenna," IEEE Trans. Antennas Propag., Vol. 51, No. 8, 1982-1986, 2003.
doi:10.1109/TAP.2003.814747
13. Suh, S. Y. A comprehensive investigation of new planar wideband antennas, Ph.D. dissertation, Virginia Polytech. Inst. State Univ., Blacksburg, VA, USA, 2002.
14. Suh, S. Y., W. L. Stutzman, and W. A. Davis, "A new ultrawideband printed monopole antenna: The planar inverted cone antenna (PICA)," IEEE Trans. Antennas Propag., Vol. 52, No. 5, 1316-1365, 2004.
doi:10.1109/TAP.2004.827529
15. Suh, S. Y., W. Stutzman, W. Davis, and J. Schiffer, "A novel CPW-fed disc antenna," IEEE Antennas and Propagation Society International Symposium, Vol. 3, 2919-2922, 2004.
16. Pell, B., E. Sulic, W. Rowe, K. Ghorbani, S. John, R. Gupta, and K. F. Zhang, "The design and realization of uniplanar CPW fed PICA slot antennas," IEEE Microwave Conference, 2008. AMPC 2008. Asia-Pacific, 1-4, 2008.
17. Cheng, S., P. Hallbjorner, and A. Rydberg, "Printed slot planar inverted cone antenna for ultrawideband applications," IEEE Antennas and Wireless Propagation Letters, Vol. 7, 18-21, 2008.
doi:10.1109/LAWP.2007.914115
18. Kharakhili, F. G., M. Fardis, G. Dadashzadeh, A. K. A. Ahmadi, and N. Hojjat, "Circular slot with a novel circular microstrip open ended microstrip feed for UWB applications," Progress In Electromagnetics Research, Vol. 68, 161-167, 2007.
doi:10.2528/PIER06071901
19. Chen, D. and C.-H. Cheng, "A novel compact ultra-wideband (UWB) wide slot antenna with via holes," Progress In Electromagnetics Research, Vol. 94, 343-349, 2009.
doi:10.2528/PIER09062306
20. Zhang, G. M., J. S. Hong, B. Z. Wang, Q. Y. Qin, J. B. Mo, and D. M. Wan, "A novel multi-folded UWB antenna fed by CPW," Journal of Electromagnetic Waves and Applications, Vol. 21, No. 14, 2109-2119, 2007.
doi:10.1163/156939307783152911
21. Stutzman, W. L. and G. A. Thiele, Antenna Theory and Design, 2nd Ed., John Wiley & Sons, 1998.
22. Chen, N. W. and Y. C. Liang, "An ultra-broadband, coplanar-waveguide FED circular monopole antenna with improved radiation characteristics," Progress In Electromagnetics Research C, Vol. 9, 193-207, 2009.
doi:10.2528/PIERC09071610
23. Chen, N. W. and Y. C. Liang, "Coplanar-waveguide fed circular disc monopole antenna with improved radiation characteristics," IEEE Trans. Antennas Propag., 1-6, 2007.
24. Lamberty, B. J., "A class of low gain broadband antennas," Proc. IRE Wescon Convention Rec., 251-259, 1958.