Y. J. Ren and K. Chang, “An Annual Ring Antenna for UWB Communications,” IEEE Antennas Wireless Propagation Letters, Vol. 5, No. 1, 2006, pp. 274-276. http://dx.doi.org/10.1109/LAWP.2006.875897
 C. Zhou, H. L. Cao and L. S. Yang, “An Improved Coplanar Waveguide-Fed Ultra-Wideband Antenna Design,” Chongqing University of Posts and Telecommunications (Natural Science), Vol. 20, No. 1, 2008, pp. 39-41.
 A. Subbarao and S. Raghavan, “A Novel Pot Shaped CPW-Fed Slot Antenna for Ultra Wideband Applications,” Emerging Trends in Electrical and Computer Technology, Vol. 23, No. 24, 2011, pp. 1119-1122.
 Y. Z. Shen and Law Choi Look, “A Microstrip-Fed Quasi-Spiral Circularly Polarized Ultra-Wideband Antenna,” 2011 IEEE International Symposium on Antennas and Propagation, Vol. 20, No. 23, 2011, pp. 1-4. http://dx.doi.org/10.1109/APS.2011.5996570
 Y. S. Jia, I. G. Chung and W. C. Zhi, “Broadband CPW-Fed Circularly Polarized Square Slot Antenna with Lightening-Shaped Feedline and Inverted-L Grounded Strips,” IEEE Transactions on Antennas and Propagation, Vol. 3, No. 58, 2010, pp. 973-977. http://dx.doi.org/10.1109/TAP.2009.2039335
 M. A. Habib, A. Bostani and A. Djaiz, “Ultra Wideband CPW-Fed Aperture Antenna with WLAN Band Rejection,” Progress in Electromagnetics Research, Vol. 106, 2010, pp. 17-31. http://dx.doi.org/10.2528/PIER10011905
 M. S. Yuan and Y. L. Chung, “CPW-Fed Dual Folded Symmetry Planar Antenna for Multiband Operation,” International Conference on Electromagnetics, Applications and Student Innovation (iWEM), Taipei, 2011, pp. 43-47.
 P. Pongsoon and D. Bunnjaweht, “CPW-Fed Disc Patch Antennas with an Annular Ground Plane for UWB Applications,” International Symposium on Intelligent Signal Processing and Communications Systems (ISPACS), Chiang Mai, 2011, pp.1-4. http://dx.doi.org/10.1109/ISPACS.2011.6146217
 J. X. Huang, F. S. Zhang and Q. Zhang, “Novel Wide-Slot Antenna Fed by Equiangular Spiral for Ultra-Wideband Communications,” Processing IEEE International Conference on Ultra-Wideband (ICUWB), 2010, Vol. 1, pp. 1-3.
 S. Shrestha, J.-J. Park, S.-K. Noh and D.-Y. Choi, “Design of 2.45 GHz Sierpinski Fractal Based Miniaturized Microstrip Patch Antenna,” 18th Asia-Pacific Conference on Communications (APCC), 15-17 October 2012, pp. 36-41.
 D. Nashaat, H. A. Elsadek, E. A. Abdallah, M. F. Iskander and H. M. Elhenawy, “Ultrawide Bandwidth 2 × 2 Microstrip Patch Array Antenna Using Electromagnetic Band-Gap Structure (EBG),” IEEE Transactions on Antennas and Propagation, Vol. 59, No. 5, 2011, pp. 1528-1534.
 F. Zhang, F.-S. Zhang, Y.-B. Yang and Z. Zhang, “Wide Band Antenna Array Using Bowtie-Shaped Microstrip Patch Antenna,” 2010 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 8-11 May 2010, pp. 424-427